1

TABLE OF CONTENTS

I. Definitions

II. Waveform Properties …………………………………………… 1

III. Scientific Notation …………………………………………..…. 2

IV. Transient Levels of Concern

a. ASAE Paper Number 943597-Graph ……………………. 3

b. Conservative Table of Interpreted Values of Reinemann’s Graph

……………………….………………..…………………… 3

c. Behavioral Response for 5% Most Sensitive Cows ………. 3

V. TEKSCOPE settings as suggested for Ag Rep 2006-2012 ………. 4

Play-by-Play 6

Store a setting as USER 2 ……………………………… 6

Overview of Steps

1. RESET to factory default ……………………………… 6

2. VERTICAL ……………………………… 7

3. HORIZOTAL ……………………………… 9

4. TRIGGER ……………………………… 10

MENUS ……………………………… 11

Save current setup ……………………………… 12

Recall current setup ……………………………… 13

Capturing a transient event ……………………………… 14

Display and Hold a transient on the Screen ……………………………… 14

Saving Waveform displayed on the Screen ……………………………… 15

Recall a Saved Waveform ……………………………… 16

Transferring a Waveform to computer from Tekscope

using Waveform Manager ……………………………… 17

Auto Range ……………………………… 22

AE Agricultural Customer Services

Play-by-Play

Tekscope Manual

2012

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

-1

-0.5

0

0.5

1

1.5

2

2.5

0

0.0

05

0.0

1

0.0

15

0.0

2

0.0

25

0.0

3

0.0

35

0.0

4

0.0

45

0.0

5

Time

Vo

ltag

e

One period

(T)

5mS/div500mV/div

1Hz (Hertz) = 1c/s (cycle per second)

T = 1/f T = one period measured in seconds

or f =1/T f = frequency measured in Hertz

Example

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 Abbreviation Power of 10

Nano n 0.000000001 = 10-9

Micro 0.000001 = 10-6

Milli m 0.001 = 10-3

Kilo k 1000 = 103

Mega M 1000000 = 106

Giga G 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 26mV (millivolts)

16.67ms (milliseconds) 16.67 X 0.001 0.01667s (seconds)

3

TRANSIENT LEVELS OF CONCERN The following table is interpreted from ASAE Paper Number 943597-

Effects of Frequency and Duration on the Sensitivity of Dairy Cows to Transient Voltages by

Reinamann etal.

Phase Duration

Tp

( sec)

Threshold Voltage*

Vt

(Peak V)

Threshold Current

It

(Peak mA)

< 10 60 120

10 – 20 30 60

20 – 30 21 42

30 – 40 15.5 31

40 – 50 14 28

50 – 60 11.5 23

60 – 70 10 20

70 – 80 8.5 17

80 – 90 7 14

90 – 100 6 12

100 – 200 5 10

200 -300 4.5 9

300 – 400 4 8

400 – 500 3.5 7

500 – 600 3.25 6.5

600 – 700 3 6

700 – 1000 2.5 5

*Across 500 resistor

Behavioral response for 5% most sensitive cows, sine waves

muzzle to hooves exposure

1

10

100

1,000

10,000

0.1 1 10 100 1000 10000

Phase Duration (microseconds) = time between zero crossings

Voltage (

Zero

to P

eak)

500 O

hm

C

ow

Conta

ct

1 cycle Biphasic

1 cycle Monophasic

Multi CycleFencers

Reinemann (Reinemann 2002)

Phase Duration

600 Hz = 835 sec

6,000 Hz = 83.5 sec

60,000 Hz = 8.35 sec

Phase duration is the

time between zero

crossings

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 Step 1

Recall Factory Setup Step 2

OK Recall Setup 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 Change

MENU

Time Base = Main

Trigger Position = 10% Change from 50% to 10%

TRIGGER

MENU

Type = Edge

Source = Ch 1

Coupling = DC

Slope = positive

Mode = Auto & Holdoff

MENUS: ACQUIRE

Mode = Pk Detect Change to Pk Detect

Stop After Single Sequence Change to Stop After Single Sequence

5

MENUS: MEAS

Select Measurement for Ch 1 Change

Pk-Pk Change

OK Select Measurement

MENUS: SAVE/RECALL Step 1

Save Current Setup Step 2

To Setup 2 user Step 3

OK Save Group 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 Step 1

Recall Factory Setup Step 2

OK Recall Setup Step 3

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

TRIGGER

LEVEL

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.

1) Turn off WAVEFORM

2) Turn on CH1

3) CH1 on screen

8

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

9

3. HORIZONTAL

Set SEC/DIV to 2 S Change

MENU

Time Base = Main

Trigger Position = 10%

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

Slope = positive

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.

Previously

set

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.

22

AUTO RANGE

This button will allow the Scope to automatically pick the VERTICAL and

HORIZONTAL voltage and time settings.