Siemens UM344-2 user manual Preventive Maintenance, Tool and Equipment Requirements

CALIBRATION AND MAINTENANCE UM344-2

4.Press CONT (F4). Screen will display:

5.Adjust the output of the millivolt source to -18.000 mV.

6.Press CONT (F4). Screen will display:

7.Press CONT (F4) to calibrate.

Press ABRT (F3) to quit without changing calibration.

8.Wide Millivolt calibration is completed.

APPLY -18.000 mV TO mV+ (1) TO AND mV- (3)

WITH COPPER WIRE

CONT

WARNING: BURNING EPROM WILL CHANGE CALIBRATION CHARAC-

TERISTICS

ABRT CONT

Disconnect test equipment, reconnect wires, and install enclosure cap.

This completes the calibration checks and procedures

6.2 PREVENTIVE MAINTENANCE

Preventive maintenance consists of periodic inspection of the transmitter, cleaning the external surface of the transmitter's enclosure, and draining condensate from conduit. Preventive maintenance should be performed at regularly scheduled intervals.

NOTE

The electronics module contains integrated circuits that can be damaged by improper handling. The high quality devices used contain built-in protective circuitry, however, they can be damaged by low energy, high voltage electrostatic discharge. Follow procedures to prevent the buildup and discharge of electrostatic energy (see Service Kit below).

6.2.1 Tool and Equipment Requirements

The following tools and equipment are required for servicing:

ŸSet of Phillips, flat-blade, and Torx-Head screwdrivers.

ŸService Kit containing wrist strap and conductive mat (P/N 15545-110 or equivalent) for handling semiconductor components and circuit board assemblies.

ŸDigital Multimeter (DMM); see Section 6.1.1 for specifications

6-14 September 1995