Operating A Tr-Mark Ii With A T-Rex - Raytech TR-MARK III Instruction Manual

A.A.E Operating a TR-MARK II with a T-Rex
WARNING!
⇒ BEFORE OPERATING THIS OR ANY OTHER TEST EQUIPMENT
⇒ DO NOT VARY INPUT VOLTAGE (MAINS) AFTER POWERING ON
After following the connection instructions listed in chapter 'A.A.D Operating TR-MARK III
with T-Rex', switch on the power to the TR-Spy MARK II and also on the T-Rex. (Power on
sequence is not critical as the TR-MARK II and the T-Rex communicate constantly). After a 2
seconds delay both systems should turn on.
The T-Rex should have all three phase lamps illuminated and the TR-Spy should have the
display screen illuminated.
The first step in operation of the T-Rex is to ascertain the correct Vector phasing of the
transformer under test (See also Testing Notes in chapter 'A.A.D Operating TR-MARK III
with T-Rex' for better understanding).
This is accomplished by running a standard Ratio test on the transformer using the TR-Spy
MARK II.
If the correct Phase displacement is known proceed to step 2.
1. Select the correct transformer configuration on the TR-Spy MARK II then select "?" if
the Vector phasing is unknown. Run a standard ratio test (refer to the TR-Spy MARK
II manual). The TR-Spy MARK II will display the correct vector phasing at the
completion of the test.
2. Select the following screen on the TR-Spy MARK II to initialize operation of the
T-Rex:
T-Rex Operation screen
3. Enter the correct Phase displacement number. Note: The Vector phasing (number 11
shown in the example) should be the same as previously tested. The Vector phasing
can be changed if desired.
4. Press "GO" then "ALL" on the TR-Spy MARK II and the test sequence will check,
calibrate, and test each phase sequentially (A, B, C) while applying three phase
voltage to the transformer.
5. The Results of the voltage ratio and phase relationship will be displayed on the TR-
Spy MARK II screen.
6. End of Test. It is now possible to print or store the test results (see the TR-Spy MARK
II manual).
90100.1.02 Instruction Manual TR-MARK III
READ ALL SAFETY WARNINGS AND UNDERSTAND THEM FULLY.
TEST SET.
Page 62 of 70