KATC-C1 Instructions Page 10 04/14
Freq. Counter – no Finish
This message is similar to the message above except that it indicates that the KATC-C1 was able to
start taking a measurement but was unable to complete the process.
REF. COUNTER = 0
This message indicates that zero crossings were detected but that there have not been any counts
received from the Counter Card #6. This could be caused by a defective component on Card #6 or
Card #4. Contact Knopp for further diagnosis.
ERROR COUNT>REF. COUNT
This message indicates a defective Card #6 (Counter Card). Contact Knopp for further diagnosis.
S + E*COS() > 25.00
This message indicates an internal math overflow during error calculations. This message could be
caused by a large error in the transformer-under-test when the test current is near the maximum 25
ampere capability of the KATC-C1. Reducing the current should allow the KATC-C1 to take a
measurement and indicate the large error in the transformer-under-test.
WRONG POLARITY
If the Transformer-Under-Test is connected with incorrect polarity, the display will indicate WRONG
POLARITY. Continuing to increase the current will trigger the audible alarm and result in an opening
of the KATC-C1 interlock relay.
PHASE ANGLE > 45°
This message indicates that the phase angle error of the transformer-under-test is greater than 45°. An
error of this magnitude is too large for the KATC-C1 to accurately measure.
(S+Ecos)2+(Esin)2 >625
This message indicates an internal math overflow during error calculations. This message could be
caused by a large error in the transformer-under-test when the test current is near the maximum 25
ampere capability of the KATC-C1. Reducing the current should allow the KATC-C1 to take a
measurement and indicate the large error in the transformer-under-test.
A/D not low (start)
A/D not high
A/D not low (end)
These three messages are related to a malfunction of the KATC-C1 Analog-to-Digital (A/D)
Converter. This could be caused by a failure of the ±15 VDC Analog Power Supply or by a failure of
the A/D Converter located on Card #8.
REF CURRENT TOO HIGH
This message indicates that the current in the secondary of the Reference Transformer has exceeded
the 500% limit of the KATC-C1.
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