Vanguard EZCT-S2 User Manual
Page 3
REV 3 EZCT S2 USER’S MANUAL
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TABLE OF CONTENTS
CONVENTIONS USED IN THIS DOCUMENT ....................................................................... 1
1.0
INTRODUCTION .................................................................................................................... 2
1.1
General Description and Features ................................................................................... 2
1.2
Furnished Accessories ...................................................................................................... 3
1.3
Technical Specifications ................................................................................................... 4
1.4
EZCT S2 Controls and Indicators ...................................................................................... 5
2.0
PRE-TEST SETUP ................................................................................................................... 7
2.1
Operating Voltages .......................................................................................................... 7
2.2
LCD Screen Contrast Control ............................................................................................ 7
2.3
Printer Paper Control ....................................................................................................... 7
2.4
Printer Paper .................................................................................................................... 7
3.0
OPERATING PROCEDURES ................................................................................................... 9
3.1
EZCT S2 Cable Connections .............................................................................................. 9
3.2
Performing Tests ............................................................................................................ 11
3.2.1.
Entering Test Record Header Information ............................................................. 11
3.2.2.
Performing Excitation and Ratio Tests ................................................................... 14
3.3
Working With Test Records ........................................................................................... 22
3.3.1.
Restoring and Printing a Test Record From Flash EEPROM ................................... 22
3.3.2.
Printing a Restored Test Record ............................................................................. 25
3.3.3.
Printing a Directory of Test Records Stored in the EZCT S2’s Memory .................. 26
3.3.4.
Erasing Test Records From the Flash EEPROM ...................................................... 28
3.4
Working With Test Plans ................................................................................................ 30
3.4.1.
Extracting the Test Plan From a Test Record ......................................................... 30
3.4.2.
Printing a Directory of Test Plans Stored in the EZCT S2’s Memory ...................... 32
3.4.3.
Printing a Test Plan ................................................................................................. 34
3.4.4.
Erasing Test Plans From the Flash EEPROM ........................................................... 36
3.4.5.
Loading a Test Plan from the EZCT S2’s Flash EEPROM ......................................... 38
3.4.6.
Running a Test Using a Loaded Test Plan ............................................................... 39
3.4.7.
Unloading a Test Plan from the Working Memory ................................................ 43
4.0
CHANGING SETUP PARAMETERS ....................................................................................... 44
4.1
Setting the Knee Point Marker ...................................................................................... 44
4.2
Selecting the Buried CT in Transformer Delta Option ................................................... 46
4.3
Setting the Clock ............................................................................................................ 49
5.0
DIAGNOSTICS, VERIFICATION, AND TROUBLESHOOTING ................................................. 50
5.1
Performing a Diagnostics Test ....................................................................................... 50
5.2
Verifying the EZCT S2’s V
x
Sense Circuit Using an External Meter ................................ 51
5.3
Verifying the EZCT S2’s I
x
Sense Circuit Using an External Meter .................................. 52
5.4
Quickly Verifying the EZCT S2’s Turns Ratio Circuit ....................................................... 53
5.5
Troubleshooting Guide .................................................................................................. 54
6.0
Appendix A - Calculating Turns Ratio on a Shunt Reactor ................................................. 55