AEMC 8500 - VT;PT Testing

Digital Transformer Ratiometer DTR
®
Model 8500 11
4.3.2 VT/PT Testing
1. When the instrument is set for VT/PT testing, the DTR
®
will display the
VT/PTTestModeReadymessageaftertheinitialpower-upsequence.
This message indicates that the DTR
®
is now ready to execute a test.
2. Press the TEST button once.
WARNING: The test should not be performed while personnel are
handling transformer connections.
3. Press [TEST] to Check Continuity is now displayed for three (3)
seconds. If a continuity test is desired, the TEST button should be
pressed once at this time. The results of continuity testing will be
displayedasCONTorOPENforbothXandHconnections.Referto
VT/PT Continuity Test (page 12) for more information.
4. The next message displayed is *Ratio Testing [TEST] to Cancel. The
asterisk ( * ) will blink as testing proceeds. Testing may be cancelled at
this time by pressing the TEST button once. If the test continues, Ratio
and Excitation current will be displayed.
5. Once test results are recorded, press the TEST button to reset for the
next test.
This routine may be repeated as many times as needed without powering
down the unit.