Tekscope Play-by

1
2012
AE Agricultural Customer Services
Play-by-Play
Tekscope Manual
TABLE OF CONTENTS
I. Definitions
II. Waveform Properties ……………………………………………
III. Scientific Notation …………………………………………..….
IV. Transient Levels of Concern
a. ASAE Paper Number 943597-Graph …………………….
b. Conservative Table of Interpreted Values of Reinemann’s Graph
……………………….………………..……………………
c. Behavioral Response for 5% Most Sensitive Cows ……….
V. TEKSCOPE settings as suggested for Ag Rep 2006-2012 ……….
Play-by-Play
Store a setting as USER 2
………………………………
Overview of Steps
1. RESET to factory default
………………………………
2. VERTICAL
………………………………
3. HORIZOTAL
………………………………
4. TRIGGER
………………………………
MENUS
………………………………
Save current setup
………………………………
Recall current setup
………………………………
Capturing a transient event
………………………………
Display and Hold a transient on the Screen ………………………………
Saving Waveform displayed on the Screen ………………………………
Recall a Saved Waveform
………………………………
Transferring a Waveform to computer from Tekscope
using Waveform Manager
………………………………
Auto Range
………………………………
1
2
3
3
3
4
6
6
6
7
9
10
11
12
13
14
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15
16
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1
Introduction
The Tekscope is a hand held digital oscilloscope. It is intended to be used to measure
both the power line frequency and higher frequency components of steady state and
transient voltages that may be present in the cow contact area.
Definitions
Waveform: The path traced by the voltage and plotted as a function of time.
Instantaneous Value: The magnitude of the waveform a any instant in time. The
magnitude is obtained from the vertical axis. This value can be obtained from
interpreting it from the volts/div setting or use of the cursors function of the Tekscope.
Periodic Waveform: A waveform that continually repeats itself in regular intervals. ie:
60Hz contribution in the cow contact area.
Period (T): The time between regular intervals.
Cycle: The portion of a waveform contained in one period.
Frequency (f): The number of cycles in one second measured in Hertz (Hz).
Figure 1
2.5
2
1.5
One period
(T)
0.5
-1
-1.5
-2
-2.5
5mS/div
500mV/div
Time
1Hz (Hertz) = 1c/s (cycle per second)
T = 1/f
or f =1/T
Example
T = one period measured in seconds
f = frequency measured in Hertz
0.05
0.045
0.04
0.035
0.03
0.025
0.02
0.015
0.01
-0.5
0.005
0
0
Voltage
1
2
One period at 60Hz
16.67ms
1/60Hz
.01667s and 1/.01667s
60Hz
Note: For a clean sine wave, the AC rms value of the waveform is the peak value
divided by the square root of 2. In Figure 1 the maximum value (or peak value) of the
waveform is 0.707V the ACrms value is 0.50V
Scientific Notation
Prefix
Nano
Micro
Milli
Kilo
Mega
Giga
Abbreviation
n
m
k
M
G
Power of 10
0.000000001 = 10-9
0.000001 = 10-6
0.001 = 10-3
1000 = 103
1000000 = 106
1000000000 =109
If one has a unit with a prefix and wishes to remove the prefix (ie: millisecond to
seconds), multiply by the power of 10. To add a prefix to a unit (ie: volts to millivolts),
divide by the power of 10.
Examples
0.026V (volts)
.026 X 0.001
16.67ms (milliseconds)
26mV (millivolts)
16.67 X 0.001
0.01667s (seconds)
3
TRANSIENT LEVELS OF CONCERN
The following table is interpreted from ASAE Paper Number 943597Effects of Frequency and Duration on the Sensitivity of Dairy Cows to Transient Voltages by
Reinamann etal.
Phase Duration
Threshold Voltage*
Tp
Vt
(Peak V)
( sec)
< 10
60
10 – 20
30
20 – 30
21
30 – 40
15.5
40 – 50
14
50 – 60
11.5
60 – 70
10
70 – 80
8.5
80 – 90
7
90 – 100
6
100 – 200
5
200 -300
4.5
300 – 400
4
400 – 500
3.5
500 – 600
3.25
600 – 700
3
700 – 1000
2.5
*Across 500 resistor
Phase Duration
600 Hz = 835
sec
6,000 Hz = 83.5
60,000 Hz = 8.35
sec
sec
Phase duration is the
time between zero
crossings
Threshold Current
It
(Peak mA)
120
60
42
31
28
23
20
17
14
12
10
9
8
7
6.5
6
5
Behavioral response for 5% most sensitive cows, sine waves
muzzle to hooves exposure
10,000
1 cycle Biphasic
1 cycle Monophasic
Fencers
Voltage (Zero to Peak)
500 Ohm Cow Contact
Multi Cycle
1,000
100
10
1
0.1
1
10
100
1000
Phase Duration (microseconds) = time between zero crossings
Reinemann (Reinemann 2002)
10000
4
Overview of Steps
Goal: Want to have a common setting that can be recalled by any ag rep for comparison
to other reps measurements. Listed is an overview of what this setup will provide:
 This basic setup will provide a 20 second rolling view on the Tekscope.
o The Tekscope will detect single pulses as low as 2 Microseconds but will
not identify duration without changing the time on the horizontal axis.
 Triggering will not be needed for the 20 second view but will be needed when set
at or below 200ms SEC/DIV on horizontal axis.
 If the capture of a specific event is desired, just decrease the Horizontal SEC/DIV
to 200ms or less and use RUN/STOP button to reset trigger (no change of Acquire
is necessary).
TEKSCOPE settings as suggested for Ag Rep Italic is what you need to change
SAVE/RECALL
Recall Factory Setup
OK Recall Setup
Step 1
Step 2
Step 3
VERTICAL
Changes below. If not listed, the
factory setting is same.
 Display CH1 and turn all other waveforms off.
MENU
 Coupling = AC
Change from DC to AC
 Invert = Off
 Bandwidth = Full
 Position = 0 div
 Probe type = 1x
Change from 10x to 1x with toggle
Set VOLTS/DIV = 2V
Change
HORIZONTAL
 Set SEC/DIV to 2 S
MENU
 Time Base = Main
 Trigger Position = 10%
Change
Change from 50% to 10%
TRIGGER
MENU
 Type = Edge
 Source = Ch 1
 Coupling = DC
 Slope = positive
 Mode = Auto & Holdoff
MENUS: ACQUIRE
 Mode = Pk Detect
 Stop After Single Sequence
Change to Pk Detect
Change to Stop After Single Sequence
5
MENUS: MEAS
Select Measurement for Ch 1
Pk-Pk
OK Select Measurement
Change
Change
MENUS: SAVE/RECALL
Save Current Setup
To Setup 2 user
OK Save Group
Step 1
Step 2
Step 3
Step 4
TO RECALL this setting can be recalled by:
SAVE/RECALL
Recall Saved Setup
Recall Setup 2 user
If the capture of a specific event is desired, just decrease the Horizontal SEC/DIV to
200ms or less (no change of Acquire is necessary), and adjust the trigger level.
6
Play-by-Play
Store a setting as user 2
Overview of Steps:
Reset to factory default (If you want to save your own settings, save to user 3).
Change settings to common set up for VERTICAL, HORIZONTAL, TRIGGER,
and MENUS.
Save settings so that setup can be recalled at any time.
1. RESET to factory default
SAVE/RECALL
Recall Factory Setup
OK Recall Setup
Step 1
Step 2
Step 3
TRIGGER
LEVEL
Pushing CLEAR MENU will clear the display of the settings being changed.
Italic is what you need to change from the factory setting to set up user 2
7
2. VERTICAL- Changes below. If not listed, the factory setting is
same.
 Set VOLTS/DIV = 2V
Change

Display CH1 and turn all other waveforms off.
3) CH1 on screen
2) Turn on CH1
1) Turn off WAVEFORM
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MENU
 Coupling = AC
 Invert = Off
 Bandwidth = Full
 Position = 0 div
 Probe type = 1x
Change from DC to AC
Change from 10x to 1x with toggle
9
3. HORIZONTAL

Set SEC/DIV to 2 S
MENU
 Time Base = Main
 Trigger Position = 10%
Change
10
4. TRIGGER
MENU
 Type = Edge
 Source = Ch 1
 Coupling = DC
 Slope = positive
 Mode = Auto & Holdoff
Trigger level can be adjusted and appears as arrow on screen and a number in lower right
corner of scope display.
11
MENUS

ACQUIRE
o Mode = Pk Detect
Change to Pk Detect
o Stop After Single Sequence Change to Stop After Single Sequence
\
12

SAVE/RECALL
o Save Current Setup
o To Setup 2 user
o OK Save Group
Changes user #
13
TO RECALL
this setting can be recalled by:
SAVE/RECALL
Recall Saved Setup
Recall Setup 2 user
Press RUN/STOP HOLD button to start scoll.
14
If the capture of a specific event is desired, just decrease the Horizontal SEC/DIV to
200ms or less (no change of Acquire is necessary), and adjust the trigger level.
Display and Hold a transient on the Screen
TRIGGER
 Set the TRIGGER LEVEL (the arrow on the right side of the screen) slightly
above or below the steady state waveform.
MENU
 Type = Edge
 Source = Ch 1
 Coupling = DC
Previously
 Slope = positive
set
 Mode = Auto & Holdoff
MENUS: ACQUIRE
 Mode = Pk Detect
 Stop After = Single Sequence
Press the HOLD button until RUN: appears in the Status Line. When the input voltage
exceeds the trigger level a new waveform will appear on the display, and Hold: will
appear in the Status Line. Repeat this procedure until an acceptable waveform is obtained.
15
Save Waveform Displayed on the Screen
MENU: SAVE/RECALL
 Save Ch 1 = (an open waveform memory location 1-10; use +/- to change the
memory location). Note the Location, Date, and Time when waveform was
captured.
 OK Save Waveform, OK Overwrite Waveform (if want to do this)
Waveform is captured as shown below:
Save CH 1
Pick # of waveform saved
Toggle # using TOGGLE switch
OK overwrite waveform
WAVEFORM OFF button will clear screen
16
Recall a Saved Waveform
MENU: SAVE/RECALL
 Recall Saved Waveform = (From Wfm 1-10; use =/- to change the memory
location). Note: Waveforms stored from CH 1 are recalled with REF A, and
waveforms stored from CH 2 are recalled with REF B.
 OK Recall Waveform
17
Transferring a Waveform to computer from Tekscope using Waveform
Manager
Start Waveform Manager
Open New Document under File
18
Choose TRANSFER WAVEFORMS
Edit, then Waveform Window Properties (Ctrl+E)
19
Delete “{WfmLbl} - {DateStamp /d}” and type in Farmname Date Time of Capture
Location
File title appears
Transfer Waveform from Scope
20
Tranfer Waveform that you have displayed
Waveform is tranfered
21
File, Save Document As. Browse to find folder to save in, name file, and save.
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AUTO RANGE
This button will allow the Scope to automatically pick the VERTICAL and
HORIZONTAL voltage and time settings.