Instability of 3554-50 measured values

QWhen I used the 3554-50 to measure a battery’s internal resistance, the instrument was unable to display the reading because the resistance values were unstable.

A

If the measured values are unstable as described below, try the suggested action under “Causes and solutions.”

Symptoms
1. The measured values are abnormal.
2. The instrument display shows “----.”
3. The instrument display shows “OVER.”

Causes and solutions
1. There is a wiring break in the test leads. → Replace the test leads.
*Test leads that have been bent frequently in the past may develop a break in their wiring.
2. The test leads are not connected properly. → Connect the test leads properly.
3. The 3554-50’s fuse has blown. → Replace the fuse.
4. Zero-adjustment has not been performed properly. → Perform zero-adjustment properly.
5. An appropriate range has not been selected. → Select an appropriate range with the instrument’s range button.
6. The tip of the pin-type lead is damaged. → The tip pin on the 9465-10 and 9772 (9465-90/9772-90) is user-replaceable.

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