Electronics International US-8A - Manual (Page 33)

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connect an ohmmeter, set to 10K range, to the open probe ends of the suspected bad Extension Cable. Set
the Ultimate Analyzer to the proper channel and look for a very high (+ or -) reading. A near cabin tempera-
ture reading or no change in reading indicates an open in the cable or its connectors. Also, look for a reading
on the ohmmeter around 12K ohms. Most problems of this kind are usually one of the following:
1. Poor Connections: When plugging the probe into the extension cable it is possible to get the tab on
the male connector to wedge between the red nylon and metal receptacle in the female connector. This
connection may work for a few weeks or even months and then you will start to see jumpy readings.
Disturbing the connection, without actually fixing it, will get it to work for a short time and then the
problem will reappear. Physically check your connections at the probe for a proper mate.
2. Loose Connections: The female slip-on connector between the Extension cable and probe can
become loose if the connector has been used many times. This loose connection may work for a few
weeks or even months and then you will start to see jumpy readings. A good connection is difficult to
pull apart. If your connector is loose it can be tightened using a pair of needle nose pliers. Check your
connectors at the probe for a good tight connection.
3. Poor Crimp: This is usually only a problem if you have removed the connectors and replaced them.
This connection may work for a few weeks or even months and then you will start to see jumpy read-
ings. To check a crimp, give a sharp pull on the wire and connector. The wire should be tight in the
crimp (no movement). When putting a new connector on a wire, double the wire over and put two tight
crimps on the connector.
TROUBLESHOOTING SUGGESTIONS C. Extension Cable Check Out: