KATC-C1 Instructions
Page 12
04/14
Troubleshooting and Repair
Prior to initiating any repair of the KATC-C1, we encourage you to call us at one of the numbers
listed above. Quite often, after hearing a brief description of the problem, we are able to identify the
failed component and save you significant amounts of time.
Doesn't Work The First Time
If your KATC-C1 doesn't work after you have just unpacked it and applied power for the first time,
the problem is probably a bad connection resulting from shipment. Remove the rear panel and
"re-seat" all the printed circuit cards and the ribbon cables. Make sure that the cards "snap" into place.
Also check your connections to the transformer(s) and to the loading system.
Identical Or Near Zero Results
If you get near identical results for a number of transformers (or near zero errors), the Error Resistor
Card has probably been damaged. This can occur if a TUT has been connected with wrong polarity or
you have selected the wrong current range (wrong ratio). Both conditions will cause excessive error
current and, if the condition is severe enough, may defeat the protective circuitry in the KATC-C1.
Remove Card 1 and inspect it for any burned resistors or traces. The relays on this card are also
susceptible to excessive error current — but damage may not be visually evident.
Make sure that the "interlock" feature is connected to help prevent future problems.
Note that the internal KATC-C1 interlock relay is capable of carrying a maximum of 120 or 240
Volts at 10 Amperes. If this relay is being used to interrupt the main supply of a current source, it
may be necessary to use the KATC-C1 interlock relay to control a larger “contactor” type relay in
order to minimize the voltage and/or current passed through the KATC-C1 interlock relay.
Chapter
5
You Can Contact Knopp At:
(800) 227-1848 or
(510) 653-1661
