517 Introduction

Calibration processes for both front panel and computer interface operation are described in Chapter 4 of this manual. Generally, a calibration failure is noted with an error beep and a displayed 'Error' at the front panel and a device dependent error over the computer interface. These indications occur if the input varies from what the meter expects to see by more than ±15%. After one second, the meter reverts to normal operation in calibration mode.

Before suspecting a fault with the Fluke 45, verify that the calibration is being conducted properly.

• Check the connections between the source and the meter. Are all the connections in place.

• Check the output of the calibration source. Does it equal the value called for by this calibration step?

• Check the calibration source. Is it in operate mode? Has it reverted to standby?

If the calibration setup is correct, a faulty component within the Fluke 45 may be causing the failure. Each measurement function depends on a combination of components in and around the Analog Measurement Processor (A1U1). Basic dc measurements depend on the zener reference (A1VR1), reference divider network (A1Z3), and integrate resistors (A1Z3). Resistance measurements and dc measurements above three volts additionally depend on the resistors in the dc divider network (A1Z1). AC measurements depend on the ac divider network (A1Z2), ac buffer (A1AR1), and rms converter (A1A1), as well as the basic dc measurement components.

Note

The Fluke 45 utilizes three measurement rates: slow, medium, and fast. Two sets of measurement ranges are used: one for the medium and fast rates and one for the slow rate. Whenever the meter is powered-up or put in calibration mode, the medium rate is selected. During calibration, the slow rate is selected automatically as required by the calibration step.

DIY Battery Repair

DIY Battery Repair

You can now recondition your old batteries at home and bring them back to 100 percent of their working condition. This guide will enable you to revive All NiCd batteries regardless of brand and battery volt. It will give you the required information on how to re-energize and revive your NiCd batteries through the RVD process, charging method and charging guidelines.

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