Speedtronic Control Calibrator Handbook

f/
-
GENERAL
ELECTRIC
COMPANY
D R I V E S Y S T E M S P R O D U C T D E P A R T M E N T
SALEM, VA. 24153
f
@
INSTRUCTIONS
GEK-28673
SPEEDTRONIC" CONTROL
CALTRRATOR HANDBOOK
4 t h Editton
June 23, 1978
PROPRIETARY INFORMATION OF THE GENERAL ELECTRIC COMPANY
IS CONTAINED IN THESE INSTRUCTIONS
* Trademark of General Electric Company
GENENil @ E L E C T R I C
Sheet -1
CONTENTS
Page
3
Introduction
4
I. Features
A. Physical
4
B. Signal Sources
4
1.
Millivolt
4
2.
Variable Frequency
5
39
Standard Voltage Source
6
6
4. Current/Volta,ge
5.
6
Test Pot and Switches
7
6. Sequence Switches
C.
8
Patchboard
II. Ca.libration
10
General
10
1.
10
A.
2.
B.
III.
IV.
10
Instrumentation
3. References
11
4.
12
Techniques
Signal
1.
c.
Connections
Thermocouple
Sample
Revision
16
Sources
Simulation
Calibration
Variation
Procedure
Definition
DEVICE INFORMATIOE
A.
Calibrator, I:c4g88Aloo,
B.
1c36oo~~ss, shs. 3.0-Fl.
Shs. 3 .l-3.23
1c36ooscz~, Shs. 3.0-Fl.
c.
IC36OOSVFA.
Shs. 3.0-Fl.
Patchboard
Layout
16
17
18
Sheet - 2
INTRODUCTION
$
The SPEEDTRONIC*
Control calibrator provides a convenient method of accessing
important variables within a SPEEDTRONIC* control system and supplying signals to t .he
panel to simulate the input from sensors external to the panel. The calibrator
patch board and the two connectors ___whichplug between the SPEEDTRONIC* control
“page” and calibrator are the means for reading out and inputing signals to the
control.
The calibrator is dedicated to the SPEEDTRONIC*
controls by its plug-in
feature and by the fact that it is powered by the control to which it is connected.
Its signal sources are universal types however; (such as millivolt, variable
frequency, current and voltage) which may be used to calibrate special circuits
that may be part of-a particular SPEEDTRONIC* control application.
These instructions cover the calibrator and how it may be used to calibrate a
SPEEDTRONIC* control system.
The actual procedure for calibrating and the settings
are contained in the Control Specifications.
also needed for calibrating.
The System Elementary drawing is
The interconnection between the calibrator and the
__-_--- -.._- -_- -_----_--_--_.__--
control system is shown on the
42 series sheets of the System Elementary.
-..___._---___-__----------.
---
On the last sheet of this publication is a patchboard layout showing points on
the patchboard which are generated within the calibrator.
The System Instruction
book will be useful for both general information about the system and specific
information about each piece of equipment and should be referred to in the event
trouble-shooting,
changes, or repair need be accomplished.
This calibrator may be used to calibrate any Mark I or Mark II Speedtronic* control
panel.
The calibrator is presently in its 3rd revision, but changes have been
minor.
For revision variations, refer to Section III, Revision Variation
Definition.
* Trademark of General Electric Company
Sheet - 3
SPEEDTRONIC*
"
CONTROL
CALIBRATOR
See Revision Variations Section III
ICF37009
I.
FEATURES
. i,
A. PWSICAL
The calibrator is packaged in a carrying case with additional space
available for a digital voltmeter and frequency counter.
It is connected
to the SPEEDTRONIW control panel by means of 2 connector cables which
plug into slots 'A" and "Brc in the calibrator and 2 slots on the "page"
designated "CALIBRATOR TEST" and "AUX TEST" respectively.
Each
connector
cable contains 51 wires.
The circuits for power supply, signal sources etc. are built on
DIRECTOMATIW II cards and plugged into the
the connector cables A and 3.
card slot rack along with
Card Slot C contains SVFA on which the
circuits for the 2 variable frequency oscillators are built.
Card Slot I)
contains SCZh on which the 2 millivolt sources and voltage/current source
are built.
The EPSS card in slot E contain a-SOVDC to-12VDC power supply.
B. SIGNAL SOURCES
1,
The millivolt source is designed to simulate low level signals such
as turbine exhaust thermocouples over a range 0-50MV with FINE adjustment of 23 MV.
a. There are two sources.
b.
Their respective power is derived each from one of the 3 KHZ
power oscillators in the SPEEDTRONIC% page.
c. Outputs are available on patchboard @WA, C4 and C5; MVB, C6
and C7).
* Trade Nark of General Electric Co.
Sheet - 5
I.
FEATUHES - (continued)
B.
SIGNAL SOURCES - (continued)
a.
"S$:c switch can be used to switch each source to either
position on the patchboard.
SWITCH DOWN MV#l AT MY-A; MV#2 AT MVB
SWITCH Up
MV#2 AT MVA; MV#lAT MVB
This allows the two sources to be set up at convenient end points,
for instance, when calibrating gain and offset on the temperature
amplifier.
e. Circuit details: IC~~OOSCZA
2. The two Variable Frequency sources are 10 to 11 volt peak to peak
variable from 15 Hz to 12.5 KHZ Sine wave (66.7 millisec. to 80.0
microsec).
The sources may be used to simulate a speed signal from
a"pulse tach" ma.gnetic pick-up in order to calibrate pulse rate to
analog circuit and speed control loop.
a. Fine adjustment + 25OHZ.
b.
Output available on patchboard
(FRE.2, #lat Cl and FREQ #2 at Cl0 with respect to ACOM)
c. Circuit 5s powered by 1c36oo~~ss MINUS jOV TO MUNUS 12V converter
unless MINUS I2 VOLT supply is available in SPEEDTRONIC* control
in which case MINUS 5oV is not available; it also requires plus
12V supply from SPEEDTRONIC* control.
d.
Circuit details IC36OOSVFA.
Sheet 6
_I
I.
FEATURES - (Continued)
B.
SIGNAL SOURCES - (Continued)
3. The Standard voltage sources are approximately 6 volts and 20
millivolts.
The actual values will be recorded on the 1~3600~~~~
card on which the terminal binding posts are located.
These
standard sources may be used to calibrate instruments such as
voltmeter or scope.
4. The combination CURRENT/VOLTAGE source makes available a current
and a voltage to simulate pressure transmitters, etc.
a. With 50 volt bus available in control:
current, 0-50ma (500n MAX load); voltage 0-34VDC
With only 12 volt bus available in control:
current, O-50ma (50 n MAX load); voltage 0-LIVDC
b.
Sources are adjustable by coarse and fine pots marked "current".
c. On Patchboard:
Voltage source located D2
Current source located C2
To read current with voltmeter connect C2, (positive) to D2 across
precision resistor (10 mv/ma).
d.
Circuit details IC~~O@SCZA
5. There are two switches, a resistor pot configuration and a resistor
configuration.
a. SW9 s.p.s.t. switch could be used as a logic level switch
DC()M = "0" ; p12TJ = "1" ; or contact closure to P28v.
(patchboard points Fg and FlO).
Sheet - 7
I.
a
FJWFURJZS - (Continued)
B.
SIGNAL SOURCES - (Continued)
5. (Continued)
b.
SW10 s.p.d.t. switch could be used to switch the voltmeter
between the two overtemperature channels to facilitate
simultaneous
calibration.
(patchboard points Jl, 52, and 53).
c. Pot and resistor configuration may be used to set up a test
voltage or with 3KEZ oscillator to make a test vibration
signal.
d.
Resistor configuration may be used to simulate flame and no
flame condition of impedance expected from detectors to "Ball
park" the detector sensitivity prior to starting. The 10K
connected between Pl2V and "VERY FAST" counter rate will speed
up the digital setpoint counter for calibrating purposes, -.&I some
6. There are 7 sequence switches which may be used to simulate points
in the start-up mode.
Certain portions of the control are operable
only when the turbine has come up to a given point during start-up.
Some or all of these switches may be wired in a given application
if they are needed in order to calibrate the unit. Refer to sheet
42Iof the elementary for switch usage.
IMPORTAI'TT:
These switches normally must be turned off {down)
when starting up or running the turbine with the
calibrator connected.
Sheet - 8
FEATURES - (Continued)
C.
PATCHBOABD
The patchboard layout is shown on the final sheet of this publication
(fold out ) .
Patchboard points are connected to circuitry within the
calibrator such as sources, test switches, and components; or jacks
along the right side of the calibrator to allow hook up of instruments;
or through the connector cable to the SPlZEXYCRONIC* page. The points
on the patchboard which are wired through the connector to the SPEEDTRONIC*
pege are shown in The System Elementary for the specific control on
sheets.
-the 42
- series
The 10 x 10 section of the patchboard, points Al by JlO, are connected
to the SPEEDTRONIG*
page through "Corm A", the "calibrate test" connector,
and the remaining 5 x 10 section, points All by 515, are connected by
"Corm B", the "Aux test" connector.
1‘
On the layout sheet the pin numbers to which the input/output are
connected appear as the small number in the lower left hand corner
of each block.
Sheet - 9
II.
FEATURES - (Continued)
c.
PATCHBOARD - (Continued)
______~~._______.
2. The "calibrate test" connector and the "auxiliary test" connector
-.--_-- - - - - - _._.-_- .---'is shown on the 42 series
sheets - _----of the system
elementary
_--.______
for each unit.
These sheets name and reference the point in the
circuit to which the point is connected - if it is used.
3. To facilitate working from the system elementary to the calibrator
for a particular point, the coordinates on the patchboard are
___...._ ----_------~
the system
given adjacent to each point r&
Lp--_---elementary.
--~ -__
---.-----____
Sheet - 10
_-- -.-.-.-_~- .--__
CALIHRATION
11. TYPICAL
-__-___.~
A.
GEXERAL
Once power is applied after preliminary checkout, the unit is
ready for calibration.
Plug in the.calibrator
and check that proper
power is available at the patchboard points Al thru A6, and 3KHZ
- power oscillators A9 and A10 (refer to patchboard layout -
-__
-
-
of the turbine control elementary).
1. Necessary Connections for SPlZEDTRONIC* Calibrator
Connector "A" from calibrator should be connected to "calibrate test
card slot" on SPEEDTRONIC*
page.
Connector "B" should be connected to "Aux. Test Card Slot" on
SPEEDIRONIC* page.
Refer to job elementary to determine location of these two card slots
- - - (normally shown on sheet 421 of elementary).
- - .
.._
2. -X&iZtib~iT%~GieXZ%~&i---_.--~~-__-___
Other- instruments
that can be suppl_i&-with-the
_______.. _~--I_--..-~..-~_~--.-.--
-__
calihratorare:
.~_ .Digit&Voltmeter. 4-Digits.-(3$ Digits)
_~_. _. _- -.-- ~-- --~------ -- Counter 20Hz - 8OMHz 7 Digits
In additional to the SPEEDTRONIC* calibrator, other devices that
Multi Meter - 20,000 Ohms/Volt
Such as - Triplett Model 630
>
*
-1
or Simpson Model 270
._~._--~--
OsciLlos_cope.~~lfor__traub.leshooting
.-
only)
Such as - Tektronix 453
SPEEDTRONIC* Protective Logic Test Aid Module - catalog #277A6557Gl.
Sheet - 11
II. TYPICAL CALIBRATION - (Continued
A.
GENERAL - (Continued)
3. References:
a) Instruction Book - Comprehensive information, one lines, locations
of adjustments.
b) Job elementary diagram - Circuit, pin numbers, card location,
pot.
identification.
c) Turbine Control Specifications - Design and application
parameters, device settings,
calibration
procedure.
4. Techniques and Procedures
a) Use a voltmeter to determine logic level of signal.
11 0 (1
I1
1
II
= OV to .4V (High thresho&~"O" up to 1.5~)
=
4.75v
to la?
b) Definition of Range, Span, Zero, Offset, Gain
Given:
Exhaust temperature variation of 3000 and 1000° which
produces signals of 1.83 Mv and 23.4l~V;
Signal span = 23.41 IW - 1.83 IVN = 21.58
Signal range =
1.83 MV to 23.41&W
Signal zero or offset =
1.83 M V
If this signal is amplified to l.CV and 4,5V,
MV
Sheet - 12
.--_--_____._
. II.
-
TYPICAL CALIJlRATI.ON - (ContinuedA.
GENERAL - (Continued)
4.
(Continued)
output span
= 4.5-v -
3.5v
l.w =
Output range = l.W 4.5V
Output zero or offset = l.W
Amplifier gain = Output span
Input span
=
3.7.7
=
.1624
21.5&V
d
vMv
Adjusting "zero" and t'gaint' of an amplifier (ZERO: OFFSET)
Theoretically you should adjust the gain first, then adjust
the zero because gain affects zero and zero does not affect
gain.
However, since many amplifiers are not perfect and
since you want to start in the right "ball park", an easier
and more practical method is as follows:
Using the va,lues in the example (b) above:
1. Apply 1.83 Mv to input.
2. Adjust zero for I.W output.
3. Apply 23.41 MV to input.
4. Adjust gain for 4.5 output.
Sheet - 13
__-.-~ __. ____-..-_--.-----11. -TYPICAL C~~B&$~~ON_z_@onticlantinued)
A. GEKERAL - (Continued)
4. (Continued)
c) (Continued)
5. Apply 1.83 MV to input.
Note :
Because of the gain adjust, the zero has moved. .
6. Readjust zero for l.OV output.
7. Apply 23.41 Mv
to
input.
8. Readjust gain for 4.5 output.
Note :
The amount of readjustment decreased with each
adjustment.
9. Repeat 1 to 8 until no readjustment is necessary.
d)
"Nulling" or "balancing" the summing junction.
1. Within the stable operating range of an operational amplifier,
the sum of all currents to the summing junction is zero.
2. Many of the amplifiers used herein have integrating feedbacks.
This means that, if the net current to the summing junction
is negative, the output volts will continue to rise and conversely, a net positive summing junction current will cause
the output volts to continue to decrease. When the sTunming
junction current is zero, the output will. stop integrating
and the volts will remain constant.
Sheet - 14
_
.-___.___ -.- _--. .---------
II. TYPICK'CALIBRATION
- (Cont>&ued)
I ---.-A.
GENERAL - (Continued)
4. (Continued)
d) (Continued)
3. A voltmeter on the output of the amplifier can be used to determine when the integration stops. However, an easier method
is to use the function indicating lights. For example, consider
the temperature control card STKA and we want to set the isothermal base reference to 1OOOoF.
4
Input an exhaust temp. signal of 1OOOoF. (4.5V @ pin 17)
b)
Quickly rotate and counter rotate base reference pot. R95
so that temperature control indicating light goes on and
off. (Note:
Pot. movement causes amplifier to integrate
voltage up or down.
Light driver is voltage sensitive;
above 28V = Light out and below 28V = Light on). As you
rotate and counter rotate and the light goes on and off,
reduce the amount of excursion until the light just stays
on.
Set the pot. at the midpoint of this minimum excur-
sion.
4
The summing junction is now "nulled" for this particular
setting.
Sheet - 15
___----e-m-
II. ??@ICAL CALIBRATION - (Continued)
A.
GENERAL - (Continued)
4. (Continued)
e) Inputs and Outputs
1. Frequently, the Control Specification will refer to pin numbers
on various cards, for monitoring, logic forcing, or even
signal insertion.
This does not mean that you should work on
that pin; on the contrary, you should avoid working on the
pin itself.
Rather, you should refer to the pin and the card
on the Turbine Control elementary and, if possible, determine
some more appropriate point, on the same point in the circuit
as the pin, but physically more accessible.
For example, the
point may be available on the calibrator patchboard; it may be
available on a card front; it may be an incoming signal with
isolation LED indication; it may be the output of a SL;EH
element which has LSD indication and is forcible from its
front; it may be the output of a STDC element which has IZD
indication.
2. Logic Forcing
The SLEH element can be forced to a "1" or "0" from the front.
All elements may be forced "0" on the outputs, but must never
be forced to "I.".
i.e.
You may jumper any logic signal to D-COM (to force "0")
but must never jumper a signal to Pl2Y or Pfjiv to force "1".
Sheet - 16
____-__-._.
--.---L_
II, TYPI~&.&..IER&TT~N
B.
SIGNAL
._-__-
- !Con%inued)
SOURCES
The signal source outputs appear on the patchboard so that they may be
connected to any other point on the patchboard by jumpering with the
miniature plugs supplied with the calibrator.
Sources may be accessed
for use into points not on the patchboard by patching them to large
jacks such as Y?COPE", "DVM", or YTR". These jacks will accept
standard "BANANA" plugs or may be wired to by clamping the wire under
terminal binding post.
1.
MILLIVOLT for thermocouple simulation may be accomplished 3 ways:
a.
If a cold junction compensation network is available for the
particular type of thermocouple to be simulated (such a
J type Iron-Constantan; K type Chromal-alumal), it may connected
with the proper thermocouple wire between the source and the
T. C. amplifier.
Standard thermocouple tables can be used to
convert from the temperature desired to the'millivolts which
must be measured.
b.
If the cold junction compensation network is not available the
above method will work provided the ambient temperature is
measured and difference between ambient and 3Z°F (which is the
reference used in the tables) is subtracted from the table value
of millivolts for the particular temperature desired to simulate.
Sheet - 17
_ ----
____----
II. TYPICAL CALIBRATION - (Continued)
B.
SIGNAL SOURCES - (Continued)
1. c.
If a temperature indicator such as the one on the SIEEDTRONIC*
control panel is available the temperature may be read directly.
The amplifiers and trips may then be set without measuring
millivolts .
c.
SAMpI;E CALIBRATION PROCEDURE
The following is a brief description of the steps required to use the
calibrator; as one example let us consider the case where the overspeed
trip points are to be checked.
The actual detail is defined in the
Turbine Control Specification; the following is only a description
of how to find your way around:
'
1.
Calibrator must be plugged into the panel
2.
The panel must be powered up.
3.
Refer to the Turbine Control Elementary Index, sheet AOO, and
determine which sheet the "Overspeed
4.
Protection" is located on.
Refer to the Overspeed Protection circuit in the Turbine Control
Elementary
5.
Refer to the Turbine Control Specification for the details
on settings and procedure.
6.
The control specification will typically say "insert a speed
signal of X frequency to the Overspeed Protection Card, pins
Y:, Z.+'
7.
Refer to the elementary Overspeed Protection circuit and look
for a cross reference to sheet 42~ or 42!c.
8.
Follow the cross reference to sheet 42~ or 42C and determine
the corresponding calibrator patchboard location; one position
Sheet 1.8
per Overspeed Protection card. The return is via A-COM on
-. Patchboard Gl thru G-10.
9. Refer to sheet 42D of the elementary, the patchboard layout.
Pick out a frequency source - Cl or ClO.
10.
Jumper the frequency source to the patchboard position of step
8. The return (COM) is taken care of internally.
For monitoring, jumper El to the frequency source and Fl to A-COM
11.
(ie. Gl).
This puts the frequency signal on test jacks C?; (+)
and (-); These test jacks will accept a standard plug for frequency
monitoring with a counter.
12.
Adjust the frequency with the "COURSE" and "FINE" Frequency
adjusting Potentiometer on the Calibrator; The potentiometers
are clearly labeled.
13
Cheek the Overspeed Protection function as defined in the Turbine
l
Control
III.
REVISION
VARIATION
Specification.
DEFINITION
__-The calibrator is presently in its 4133revision. Changes have been minor
and have been made to make the calibrator more versatile.
The revision
number is not on the nameplate, but the revision of any particular calibrator
is readily apparent from the following:
REVISION 1:
The original form used nomenclature on the switches as illustrated
on sheet 3.7
Also it has seven test jacks on the right hand side of sheet 3;‘:
REVISION 2:
Added two test jacks, AUX (f), (-), wired to patchboard points
E2, F2 respectively and spaced all test jacks to take a standard size plug.
REVISION 3:
The switch designations were changed from names to switch numbers,
______ -----__i.e. SW1,2 etc. Note that the switch numbers on the calibrator drawings were
- - changed to -..-facilitate
to right____
flow
This - change
allows
.p--------- - a---left
-- - --...-__ of_. switch
____ numbers.
_ _ _.__ ___----------__.______._ - _._~ - ._ -.--- .-- --
----.-
--
.---....-. ~_
Sheet 19
any one switch to be used for different functions from one panel to another.
The switch's function is defined on sheet 42Eof the panel elementary.
The switch numbering is as follows:
SW1
SW2
SW3
SW4
SW5
sw6
0
0
0
0
0
0
SW7
SW8
SW9
0
0
0
SW10
0
In addition to the change in switch nomenclature, 12 additional wire runs
1
from the panel to the patchboard have been added as follows:
connector A:
pins 49, 51
connector
Pins 1, 2% 23, 24, 27, 28, 29, 30, 50, 51
B;
This further increases the capability of the calibrator. Your calibrator will
have these extra runs if it has switch numbers on the nameplate; it will
not have these runs if the switches have names as illustrated on sheet yl“-----l
Any panel may be calibrated with any calibrator with the following reservations
1
limitations:
(4
Switch designation may be confusing, but are defined above.
(b)
The 3.2 interconnecting wires defined above will not be on revisions
1 and 2 and may be a problem when a Mark II Industrial panel is
to be calibrated with a revision 1 and 2 calibrator. This limitation
may be identified by referring toyhe-mzessheets-----.---.-_
ofXi& Pai
elementary.
A modification kit is available to take care of limitations (a) and
4
(b) where needed.
(cl
The voltage/current source on IC36OOSCZA, Rev. A is not capable
of providing a 50 MA pressure signal when used on a Mark 11
panel. (It's O.K. on Mark I>.
If this signal is required for
__~-
a Eark II panel, _a_-_------Revision B must
be obtained.
_... _.
^~---
_
_
The "TEST"
from a 1 turn lOOK
_REVISION
_.-_-_ __~__4:_-__-__--_- pot
-- -... RHll
-.. -was
.- changed
____ __.
s IC.NAL
03
05
07
09
11
13
IS
DCOM
ACOM
P50
P28
PI2
DIGITAL COMMIN
ANALOG COt+tJN
N12
N50
OSCA
OSCB
NEGATIVE 12 VOLTS
NEGATIVE 50 VOLTS
OSC I LLATOR A
3KC
OSC I LlATOR 8
3%
I7
I.9
I1
13
I5
I7
19
51
POSITIVE 50 VOLTS
POSITIVE 28 VOLTS
POSITIVE 12 VOLTS
h4
Gl - 610
Al
h2
27
A3
29
AS
A6
A9
I410
30
8.4 RMS (LVDT.) 26
8.4 RMS (LVOT) 28
Cl
11
Cl0
12
CURREM SOURCE @-5Cb@j
VOLTAGE SOURCE( &34V, SUPPLY SW; CL8, SUPPLY 12Y
CURRENT SOURCE-EXTERN CONTROL (S Ir4lJlAtlON)
c2
de
14
WA+
MVAMvB+
MYB-
MILLIVOLT
c4
C5
C6
c7
NOTE
I3
1s
PATCH BObRD
LOCAT 1 ON
PsfM
25
31
f
2
24
23
CALlERAlCR S I G N A L S
VARIABLE FREQUENCY OUTPUT t
VARIABLE FREQUENCY 1 - EXTERNAL CONTROL (SIMULATfON)
VARIABLE FREQUENCY OUTPUT 2
VARIABLE FREQUENCY 2 - EXTERNAL CONTROL (SlMlJLAT ION)
21
29
CONN A
P I N No.
rC%dER SUPPLIES
19
!7.
tw4E
S7l~IBOL
STD. A L T .
17
23
DEF It: If I OfI Am LOCAT ION
MVIC
SOURCE
MI LL IVOLT SOURCE
MVAL MV)
HVB:MV2
MYArMY
MVBs.MVt
WITH
WITH
WITH
WITH
SWITCH
SWITCH
SWITCH
SWITCH
SW-1
SW-1
SW-1
SW-1
DOkM
WWJ
UP
‘$
Ml LLiVOU SOURCE 1 - EXTERNAL CONTROL (SIMULATION)
13
C
A
07
09
11
13
15
17
19
21
tI
0
x
8
23
2s
27
29
31
33
35
37
39
41
43
45
47
49
51
Y
4
P-
03
OS
DI
14
SEE SH.
PATCH
tc3Cm
POT
3.6 FOR
SCZAl
BUSS
09
cuw
COA-E
!iOK
CONN
11
+
FINE
AC ‘34
13
13
+12”
17
19
0”
-12v
TRt
FRQt
4
19A
6
21
t
21A
-
,,
-
CPOT
I c3600
FPOT
SVFAt
IAOC
i
PATCH
S,NE 1
cyT
I
9
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ELECTRIC
Jll
CALIWATtYI
INDUSTRY CONTROL DEPT. 1 c 4 9 8aBBA , o o
SALEM. VA. U.S.A.
SW.NO.
3*s
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39
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49
51
INDUSTRY
CONTROL
DEPT.
TO SW ow
SH 3 . 4
3.3
03
05
07
09
11
13
15
17
PURPOSE
Is to provide a convenient, fast and accurate method for checking and
calibrating Spccltr0nf.c Panels. It is packaged in a carrying case
and is electric;llly connected with
ribbon cables. It provides frequency signals to calibrate the speed
c o n t r o l s , millivolt signals f o r the temperature controls, voltage or current
signals for the pressure sensors , precision voltage references for calibrating
lnstrumcnts,
and control signals are made available for monitoring.
The equipment has been designed to provide a turbine simulate function
within the present housing with a minimum of change.
m
1.
Connectors - two card and ribbon cables with fifty one wires are
used to connect the Speedtronic page with the calibrator. E a c h
c a b l e w i l l b e s i x f e e t l o n g . The A connector (red)is used primarily for the
Calibrator asd its signals while the B connector (bluc)is used primarily for
monitoring speedtronic signals.
2.
Directomatic 2 card rack - an eight card slot sack is provided.
The two left most slots are provided to accept the connector cards
of the ribbon cable. Three slots are for the XC36OOSVF’A,
SCZA, and
&%~o~~ds.
Three slots are provided,without receptacles,as space for future
19
21
23
25
a )
2?
See the card application notes for more information.
29
b
)
31
35
c
39
41
47
49
51
standard voltage source - 3 card front jacks
provided for meter calibration.
voltage and current source.
millivolt sources.
See the card application notes for more information.
37
45
IC36OOSC2A -c alibrator signal source. This card contains
t h r e e d i f f e r e n t t y p e s o f c i r c u i t . These are:
l- one
are
2 - one
3 - two
33
43
IC3~OOSVPA - voltage to frequency convertor. This card is
used in conjunction with the Frq. pots to generate variable
frequency sine waves. There are two circuits OR a card.
3.
)
IC36OOEPSS
- -5OV to -12Y regulator. This card converts
-50V to -12V DC. It is only necessary when -12V is not
availably in the system. The card does not have tg be
removed from its slot when the -5OV’is not present.
Patchboard - There are two patchboards used in the equipment. One
is a one hundred pin (10X10) Vector patchboard; the othet, a fifty
pin (lOX5) Vector patchboard. The 10X10 is used primarily for
calibrator applications and the 10X5 for monitoring speedtronic
control signals. A quantity .of piggyback type patch plugs ate
provided for patching.
T-
01 03
4.
05
07
09
5.
11
Potentiometera - eleven two watt potentiometer8 are provided for use
with the voltage to frequency convertors, millivolt sources, voltage,
source a n d t e s t functions. They are s i n g l e turn pots and full c o u n t e r
clockwise is the minimum position.
Switches - ten miniature size switches are provided for sequence simulation,
thermocouple transfer and test function. All switch toggles in the up position
(toward the card rack> provides a closed circuit.
13
15
6.
Test Jacks - four pairs of miniature binding posts are provided to
accomodate digital voltmeters, counters and oscilloscopes.
7.
Storage - space is provided for two small instruments, instruction
book and connector cables.
8.
Enclosure - is similar to a suitcase and hinged such that it is
17
19
21
23
stable in the open position.
25
Chassis Ground is brought to a Jack (Green) which can be connected to
Earth Ground.
PUNCTICNS-
9.
27
29
31
33
35
37
39
41
43
43
47
49
51
Ronitor - the fifty pin patch board AlldJ15 is provided to
monitor Speedtronic signals. The procedure is to patch the desired
signal to a test jack where it can be instrumented.
Two variable frequency oscillators are contained in the IC36OOSvFA
card. The circuits are used with four pots to achieve a variable
frequency output. By addit ion of a signal conditioning card, it La
possible to achieve voltage control.
A variable voltage source with a. ten ohm shunt is provided. It is
capable of operating from either a +5OV supply or a +12V supply.
It can be controlled from an external voltage signal for the simulate
opt ion.
The Standard voltages are precision voltage references for calibrating
instruments. The two voltages are nominally +6 volts and +20 mv; the
actual values are recorded on the card front during card test. All
calibration rr\ust be done at the tacks on the card front to avoid voltage
drops.
Two millivolt sources are provided which are adjustable from O-50
millivolts with 1 ohm output impedance floating with respect to the
Provision is made for voltage control of mv output. for the
system.
simulate option.
03
6. Switches are provided to accomplish the sequence simulation.
05
07
09
POWER
All power is supplied to the Calibrator”from t h e Spaedtronic Panel v i a
t h e ribbon connectors. 1 DCOM has been used as power common and ACOM
used as signal common.
11
13
15
OPEP?TING
A.
Install A connector in proper Speedtronic slot.
B.
1.
2.
17
19
21
c;.
23
25
I7
29
31
13
15
17
19
13
15
Ii
19
CHECK OF ELECTRONICS
D.
Check to see that the necessary DC buses are present.
Check to see that the 8.4V 3KH voLtages are present.
(use Signal, Definition and Location chart to determine
proper points).
Millivolt Source 1. P u t Swi
switch in the down positfon.
Put millivoltmeter from MVA+ to WA- by patching ~6 to C4
2.
and F6 to CS.
3 . Turn MVl-coarse pot from one e?d to the other. MV meter
should vary between OV and at least +5OW.
4 . Set output at 25 mv with MVL coarse.
‘ 5 . Turn MVL fine pot from one end to the other. MV meF,:r
’
should vary at least 3 mv from the 25 mv reading.
switch in the up posit ion.
6 . P u t SW1
7 . Millivoltmeter should read OV from WA+ to MVA-. (No control from HVl Knob)
Put mLlli.voltmeter from ?lVB+ to MVB- by patching E6 to C6; F6 to C7 and
8
G5. (Remove E6 to C4 and F6 to CS and C5 to GS) .
Meter should read 25 mv 53 mv.
9.
switch in down position.
10. P u t SW1
11. Turn MV2-coarse pot from one end to the other. W meter
should vary-between OV and at least i-50 mv.
1 2 . Set output at 25 mv with W2 coarse.
1 3 . Turn MV2 fine pot from one end to the other. MV meter
should vary at least 3 mv from the 25 mv reading.
switch in the up position.
14. Put, SW1
should read 25 mv 23 mv (same reading as
I S . Millivoltmeter
s t e p 5 ) . (No Control, From MV2 Knob)
Current Source 1. Patch C2 to E6 and Gl to F6.
2.
Monitor between +DW and -DVMA at the test facks with a
vpltmeter.
3 . Vary Curr. Coarse from one end of the pot to the o t h e r .
Voltage should vary between OV and at least 34V when i-5@?
DC Ls present.
Voltage should vary between OV and at least 8V when only +12V
DC is present.
r
!&%?%!5 “f#~?& &- G E n E R A t
“ 10, /4 7
3
I”^“’ ‘* J, A. F,bJc CI1% z.CLP
rlrsr’hof fOI
ix. MO.
fituurf~#rDf~GalY~~Lib,~~~~
EtECTRlC bplicfttion I n f o .
JNDUSTRY CONTROL DEPT.
SALEM. VA. U.S.A.
Ic4988AIOO
CoMI.OUSH 323 s*.Mo
3.22
03
E.
05
O?
09
1 11
13
15
37
19
21
Voltage C O Frequency Converbor hatch c l
to ~4 &td ~1 o CO ~4.
:: Monitor FRQl with oscilloscope dt Scope A test jacks. A 10 to 11
volt peak to peak variable frequency 15HZ to 12..SKHZ Sine W a v e
Will. be observed. (Lt is necessary to vary coarse p o t to start wave).
3.
Vary FRQL coarse from one end of the pot to the other. Frequency
s h o u l d v a r y from a t t e a s t 1SHZ t o 12.5KHZ (66,7MS T o 80.0
m i c r o s e c . period).
Set frequency at 6KHZ (167 microsec period). Vary FRQl fine
4.
from one end of the pot to the other. The frequency should
change approx. 2fO HZ.
llonitor FRO2 with oscilloscope . Remove Cl to E4, instaLl CL0 to E4. A 10
to 11 volt peak to peak variable frequency 15HZ to 1:!.5KLiZ Sine
wave will be observed.
Vary FRQ2 coarse from one end of the pot to the other.
6.
Frequency should vary from at least LSHZ to 12.5KHZ (66.7MS To
80.0 microsec. period).
Set frequency at 6KHZ (167 microsec. period). Vary FRQZ fine
from one end of the pot to the other. The frequency should
change approximately 250 HZ.
23
25
27
25
31
33
35
37
34
41
43
45
47
49
51
t
rR’lA”@v$ypi~
>I hoa
I
IS. MO.
EE#EBAL
BLIMCYTAIV DlAGBW ~a 1 jCbra to
ELECTRIC
lNDUSTRY t6MTROl DEPT.
SALEM. VA. U.S.A.
A p p l i c a t i o n Info.
IC4988AlOO
wo.3~
cow. ON In. Lo
.01
A
- _ . - , ,
5
c
D‘
E
F
G
H
J
K
VOLTAGE AND CURRENT SOURCE
STANOARO VOLTAGE
*
+50V C R 6
33
(24)
(14)Pof
a5
37
19
SPl
@) ---y-q
HSl
11
13
15
I7
19
CR5 - 68+l82ooPl
CRlO - 68AR38Pl
21
Pl -2wn4-~7373~8
23
92 - 2Ns320 - 68A7nm
CRl4,S.d -.63A?25OPl
MILLIVOLT SOURCE (2 CIRCUITS PER
!5
.I
CRT
!9
CARD)
-BCR2
31
3
5
7
t3b;
W)
9
cm OUT
(36)
I1
(34)
3
14%
5
7
9
CARD
FRONT
it
1. 1 SBH
fir%3
tL3/72
IW.
1. 2
‘ssuEo
1. 3
MAO1
,
RLV.
5
y- 2 a - 70,
PIwrS TO
6-r
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OLl
pa
.I
JH SMITH
1338
dP
iJzrhvb,
,
I FtaslM2Df
I.C. NO.
FOP
ELIM~WlA.LIY
OIAGPAM c&L 1 BRATOR
GEH ERA1 @ ELECTRIC S!GNAL SOURCE
INDUSTRY CONTROL DEPT. 1 c 3 6 0 0 s c z A 1
SALEM. VA. U.S.A.
CONT. ON SW. 3 -1
IN. NO. 3 . 0
l
D3
D5
D7
09
11
13
15
17
19
21
23
25
27
29
APPLlcATtoN NOTES - 1cmJosczA
THIS C A R D CfflTAtNS T H R E E DIffERENT T Y P E S DF ClRCUit;
A . CM STAHDARU V O L T A G E SQURCE
8. ONE VOLTAGE AND CURRENT SCURCE
C. IWO HlLLIVOLT SOURCES
A.
T H E S E AREJ
STANDARD VOLTAGE SCURCE
THIS CONSISTS OF IWO VOLTAGE SOURCES WHICH CAN BE USED FOR CALIBRATING INSTRLMENTS.
THE SOURCES ARE NCMINALlY 6 VOLTS AND 20 MiLLlVOLTS. THE PRECISE VALUE AT ROCM
TP(PERATURE WILL BE RECORD&D ON THE C4RD. THE VOLTAGES ARE DERIVED FROM THE 12’
D.C. BUS By MEANS OF A REfERENCE DIDDE CRT0 AND A RESISTANCE BRIDGE. THE NOMINAL
6 VOLTS WILL BE A M I N . DF 5 . 9 V O L T S A N D A M A X . Of 6 . 5 V O L T S A T 25” C. T H E V A R I A TION OF VOLTAGE WITH TEMPERATURE CHANGE IS .65 MV.,‘?. THE 20 W. WINAL OUTPUT
WILL BE .3% 4 2% OF THE NOMINAL 6’ OUTPUT.
ME RECORDED 6 VOLT VALUE WILL BE MEASURED
WITH A &5% METER .CRBmER.
fNPUTS: +12’ D.C. P I N 2 7 1 0 M A ,
mRfTs: +& D.C. Jl
+20 W .
D,C. J2
THE CUTPUTS SHaJLD BE MCNITORED W I TH I N S TR U ME N TS W H I C H H A V E H I GH INPUT IMPEDANCES.
0. VOLTAGE AND WRRENT SOURCE
THIS IS A VOLTAGE SOURCE WHICH IS CAPABLE Df DELIVERING 0 TO 35 VOLTS AND 0 TO 50
MA, cd Bu5Sl
It CAN a CONTROLLED FRCM AN EXTERNAL VOLTAGE S IGNAt FOR THE S fMULATE OPTICN.
IN
A S SHCMN
THE CALIBRATE MODE, THE SPDT TERMINRL IS CDNNECTED TO A PAlR Df F’OTMTICMETERS
I N FIG, 1 , COARSE AND f INE CoKTROt. CF THE DUTPVT I S P R O V I D E D By THE nj0
Fm
31
33
35
37
39
41
43
45
47
FIG. 1 - PO-fENTlavlETER
PC% T H E QSIM OmPm I S A CURREM
USED FOR THE SitMATE OPTION.
ARRANGEMENT FOA VOLTAGE AND CURRENT SDURCE,
LlMiTED B4lTTE.R
:QLLCMR.
T H E SPOT INPUT US A L S O
T H E BUS V O L T A G E FOR T H E ClRCUlt H I L L 8E EiTHER +SO” CR +IZ’. WHEN WE +12’ IS
THE BUS THE DEVICE WILL BE EQUIVALENT TO 0 TO 11’ WORKING THROUGH 2600, THE APPLlCATlDN
IS SUCH THAT’ WHEN THE +SOv IS NOT PRESENT, THE HIGHER VOLTAGE OUTPUT IS NOT REQUIRED,
THE CURRENT SIGNAL PROVIDES ABtLITY TO READ VDLTAGE DROP ACRDSS R17,
I N P U T S ; +d 55 t-94 NCWNAL, 190 MA MAX P I N 2 4
OUTPUTS:
CURRENT SIG
+12V
4 6 M A MAX P I N 2 7
PSIH
SPOT PIN 11
49
51
PROPRIETARY INFORMATION OF THE GENERAL ELECTRIC COMPANY
lNDlJSTRY COMTROL DEPT.
PtN 10
P I N 16
01 A
03
D5
37
09
11
13
15
I7
19
21
8
c
C . WILLWOLT
D
SQURCE
F
.E
( 2 CfRCUITS
G
J
ii
PER CARD)
ADJUSTABLE FRCM ‘O-60 M I L L I V O L T WITH I O+U OU7PW IMPEDANCE, fLaA7lNG WI7H RESPECT
PROVISlDtd I S M A D E FOR V O L T A G E CoNTROt. ff MIUIVDLT OU7PW fOR SIMULA’IE
70 THME SYSTM,
OPTION.
THE MILLIVOLT SOURCE DERIVES 17S PckJER FRCM THE iYDT OSCILLATOR. INPUT VOLTAGE
LFtfEL I S B.4Y; FREQUENCY 3 K H , ME WC; C U R R E N T OWN I S 1SDt.M RMS. T H E A&,
A N EMITTER FOLLCWER
I S U S E D T O CONlROL THE VccrAGE
VOLTAGE IS RECTIFIED AND flLTERED.
ACROSS A RESISTANCE DIVIDER.. T H E CUTPUT IS A PORTlDN O f THIS DIVIDERS; THE S C PDT
INPUT IS CONNECTED To SLIDE OF A 1K FOTENTJMETER
WHICH IS CONNECTED BEiWEEN THE
i+ AND 0’.
I7 PROVIDES THE C O A R S E ADJUSFM&NT of M E pvFM. S C FQT I S ALSO U S E D F O R THE
ShUtATE CCWRDL,
THE SLIDE Of A 1K p07ENTIoMFTER
IS CONNECTED TO SfPDTl THE lJDTEN7I~Ei’ER
IS CONNECTED BETWEEN 3” AND Ov, 7HIS PROVIDES THE FtNE ADJUSTMEW FOR THE UJTF’UT.
imz
8.4’, 3 K H P I N
SW07
P I N
se
P I N
SfPO7
P I N
CONNECflDN
32,
3 5 ,
3 0 ,
3 1 ,
(46)
(451
(471
WI
wrpvr:
O U T PIN 29,138)
3y P I N 2 8 , (36)
FOR CALIBRATOR IS AS SHCMI BELW:
23
(361
25
(38)
!f
(43)
29
31
0, FDUR RESISTORS AND A CAP.4ClTM1
13
WITH T H E CALIB?ATDfI...
. . . .
ARE MDW7D
CN M I S CARD
W H I C H A R E U S E D IN CCWUNttiW
l
I5
17
39
61
13
15
I7
I9
51
K
PROPRIETARY INFORMATION OF THE GENERAL ELEffRlCCOMPANY
SALEM, VA. U.S.A.
(27)
P12
ICI. - MC 1741 = 7672Pl
Ql
- 2N4249
- 68h7355Pl
42
- 2N4899
- 68A772OPl
CR3 4 . N
- 56A8202PO52
CR4
- 68hi2SOPl
APPLICATION KOTES
THIS C tRCU tT CONVERTS -50v D .C. TO -12” D. C. 8Y MEANS OF A VOLTAGE CC:iTROLLED SMlNT
REGULATOR. A SHUNT TRANS tSTOR IS CONTROLLED BY A VOLTAGE SENSING M ICROELECTRCN tC OPERATIONAL
AWLIFIER. A ZENER SUPPLY CAPABLE OF 60 MA. PROV jOES 5.3’ FOR INTEGRATED C IRCU i is.
INPUTS :
OUTPUTS :
REGULAT I ON :
RIPPLE’.
+ L2’ O.C. PlN 27 70 MA. MAX
m 50” D.C. PIN 30 300 MA. MAX
-12’ f .I” PIN 29 250 MA. MAX
+5.3” i 5% PIN 26 60 MA. MA MAX
-12’ D.C. i .03” FROM 10 I%. TO 250 MA.
LESS THAN 1CMV P-P ON -12” SUPPLY
THIS CARD b?UST 6E MOUNTED IN THE LAST USAGCE CART) SLOT IN ME CARD ROW OR LEAVE SPACE FOR 2 CARDS
IN THE CARD Rm.
PROPRlETARYlNFORMATfON OFTHE GENERALELECXiC COMPANY
SH4PER
SPI
I
05
07
.
+12V
--AZ-
PpCR?
y
ClRCUlt
3
1
ClRCUlT
3 0
SP2
l-R1
CPOT
FPOt
16
11
4
6
42
3 7
3 i
32
SW
5
49
SINE
0UTPtj-r 1
09
11
l-R1
cb-
13
R9
3.92K
K
CR
y-3
ICl AND 2
(2,501
5
o-
4s
SINE
OUTPUT
R10
3.92K
23
2
9
I
V
27
741
Q3A 4238
2Nl711
2N4036
2N27i4
45 - Q 8
Q6 - Q 7
2N2714
2N4249
Ql
42
-
68A 7672Pl
-
68A8305Pl
63A77olPl
68A7307Gl
68A7373P7
66A7355Pl
29
(271
31 -
22
OOK
0
39CPOT
RL4
41
1OK
R42
332K
h
45
17
$9
51
Q5
(29)
0
R23
182K
I
L---,-l.oocz!MFD
lNTECRA7aR
SWITCH
q;;I %
R4-l
46
4.7jJmQ
Y K
I
2
fORM 1C 2 3 9 0 (03-68)
APPLICATION
NOTES
F U N C T I O N : T H I S C I R C U I T I S U S E D I N T H E SPEEDTRUNIC
CALI5RATOR/SIMULATOR.
1T CAN ACCEPT
A V O L T A G E V I A A S I G N A L CONDItlONER C R U S E ITS CklN SWlTCH OUTPUT’ V I A .4N MTL%tAL POTENTIOMEJ’ER
TO CONTROL A FIXED MAGNITUDE VARlABLE FREQUENCY SINE WAVE OaPUl.. THE SINE WAVE IS USED TO
SMUtATE THE OUTPUT OF A MAGNETIC PICKUP WHICH IS THE SPEED SIGNAL FOR THE TURBlNE SH4FT.
WHEN USED IN THE CALIBRATOR THE OUTPUI- FREQUENCY IS CONTROLLED BY A f’DTENTIC+tETERf WHEN
U S E D 1N THE SIMULATOR -I% OUT FREQUENCY IS CONTROLLED BY A D.C. VOLTAGE VIA A SIGNAL
CONDITIONER,
CIRCUIT DESCRIPTION:
lb
15
17
THE ClRCUlT
CAN BE BROKEN DOW INTO FOUR PART-S:
I
MEGRATOR
1.
2, SWITCH-HYSTERESIS
3 . SHAPER
4. SIGNAL CONDITIONER
19
INTEGRATOR
21
23
25
SIGNAL
4
CDND-
..
JTIONER
HYSTERESIS
SWITCH
I
29
!
SW.
I
F I G .
I - BLOCK DIAGRAM
THE INTEGRATOR IS A MICROELECTRONIC OPERATIONAL AMPLIFIER.
IT
WILL
INTEGRATE ITS INIjVT
UNTIL
THE OUTPUT CAUSES THE HYSTERESIS SWITCH TO OPERATE.
A T T H I S T I M E T H E I N T E G R A T O R I N P U T WItL
REVERSE POLARITY AND BEGIN INTEGRATING IN THE OPPOSITE DIRECTION UNTIL THE HYSTERESfS
SWfTCH
I S S W I T C H E D BACK T O I T S ORIGiNAL C O N D I T I O N , THE RESULT IS THE GENERATION OF A TRIANG?JLAR
W A V E A T T H E lNTECRATOR O U T P U T . THE FREGUENCY IS CONTROLLED BY VARYING THE M4CNlTUDE CF THE
T H I S I S D O N E B Y M W N S Gf A POTENT1OMEI.ER
I N TilE SIdiTCH
C U R R E N T 1 M O T H E INTEGRATOR I N P U T ,
OUTPUT OR 6-f MEANS OF AN EXTERNAL CURRENT SOURCE FED THRU A PA IR OF DIODE SWITCHES WHICH
ARE CONTROLLED BY THE HYSTERESIS SWITCH OUTPUT.
THE INTEGRATOR OUTPUT IS FED iNT0 A SHAPER WHICH IS AN oPER4TIONAL AMPLIFIER WITH VARIABLE
CAIN.
THE GAIN IS REDUCED AT THREE DISTINCT LEVELS. TWO A R E A T T A I N E D 8Y V A R Y I N G T H E FEEDE4CK
R E S I S T A N C E T H E O T H E R By V A R Y I N G T H E I N P U T R E S I S T A N C E . T H E R E S U L T O F T H E S E G4lN CWNGES
IS A
ROUNDING OF THE TRIANGLE WAVE F&M AND A STEEPENING OF THE ZERO CROSSOVERS TO Al-i-A IN A SINE
WAVE.
C I R C U I T CwRACTERfSTICS:
1. POdER I N P U T
2. SIGNAL INPUT:
+12v
1cy~ bt4 W I T H lOOn L O A D
-12Y
100 :t4 W I T H lo0t-l L O A D
V I A POTENTlCMETER
O R D I O D E S W I T C H E S O-+1,0
t-t4 V A R I E S T H E F R E Q U E N N Fi?CM
0 TO APPROX . 12 KHZ.
PROPPJETARY iNFOR!~lAT:OM
QF THE GENERAL ELECTRJC COMPANY
._.___. -___- _.__ “._.I ..__ __- ^____ --_ .-.~ ___._ _-. _--.
3.
_
-
_
--.
_-_
.
--
_....-
SINE WAVE CUTPUT:
VOLTAGE - 1OV P - P O R 3.53 m.
.
CURRENT - 1 4 0 MA P - P O R 4 9 . 5 MA RMS
(WITHOUT CHANGE IN OUTPUT VOLTAGE LEVEL)
09
fREQUENCY-CONTINUOUSLY
VARlABLE F R O M 0 T O 1 2 K H Z
LOWEST USEASLE FREQUENCY - 15 HZ.
CALI BRATOR HCQKUP:
r-n
23
4
25
t31)
3 (30
29
f POT
C
I C36CQ
SVfAl
POT
91
10K
F
31
33
PROPRIETARY INFORMATIO~IOF THE GEHERAl ELECTRIC fOMPANY
tv
IllMtNTAPI
t s-r/e<*/
//-rl.l
,
VOLTAGE TO fRE(?UEt’ICY CCr!‘i
!V. t
iv. 1
DIAbRIM
MADf YY
, C 3 6 o o S V f A 1
LX PE”sRSON
4 fi 1338 “’ ‘*
SALEM. VA. U.S.A.
l-ON1 ON 1*
FL.
J,‘ NO 3 .2
-
A
B
C
D
Dl
INTERCONNECTION TO PAGE MADE THRaUGH
CONNECTORS _
33
D7
NU’IES CURRENT MAY HE MEASURE,,
1
B Y IN,4 F R O M U2 !*) T O
c2 I-), 1 MA - lcw
2.
S W I T C H ~~SW)~~ W I L L
C O N N E C T E I T H E R MV
SOURCE TO EITHER PATCH
39
I1
13
a .
PJINT
15
S W
I7
.
17
19
22
SW. UP
I9
3.
21
4
23
M V A T O MV2
MVS T O MVl
CONNECT’33 P I N N O ’ S
ARE SHOWN IN LOWER
LEFT OF EACH BLC)CK
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.
49
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20
MI LLVOLT SOURCES
0
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(t, M E! :I
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0
D3WN - M”A T O NV1
MVB T O MV2
0
I
0
(CCNN “8”
23
IO
MARK 1 HAS BOTH PSOV
AND N!iOV BUT MARK I I
H A S O N L Y PSV I N P L A C E
O F T H E S E T W O . (-1
25
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31
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0
(*NnLoo COMMON)
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16
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1
‘DRIVE SYSTEMS PRODUCT DEPARTMENT
SALEM, VA. 24153
GENERAL@!) E L E C T R I C
8-78 (1M)