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UM344-2 CALIBRATION AND MAINTENANCE

September 1995

6.0 CALIBRATION AND MAINTENANCE

This section describes calibration, preventive maintenance, and troubleshooting

The Maintenance section has preventive maintenance procedures that are employed to prevent conditions

from occurring that would be detrimental to the reliability of the transmitter. Should a malfunction occur,

troubleshooting procedures will assist in minimizing down-time. This section also includes transmitter

removal and replacement procedures, recommended spare and replacement parts, and an exploded view

drawing with a parts list.

WARNING

In Division 1 areas, where an explosion-proof rating is required, remove

power from the transmitter before removing the transmitter's end cap

for access to the electrical terminal compartment.

The MXC is approved for use in non-hazardous areas only.

6.1 CALIBRATION

A transmitter is calibrated at the factory and should not require field calibration. Sections 6.1.2 and 6.1.3

describe field and bench calibration of a transmitter.

Transmitter calibration should be checked at least annually and the procedures in this section performed if

out of tolerance.

An MXC is needed for calibration. It provides four calibration programs:

Ÿ DAC OUTPUT - Calibrates the Digital-to-Analog Converter that sets the transmitter's analog output

signal.

Ÿ WIDE mV - Calibrates the millivoltmeter for TC/mV inputs between -18.00 mV and 103 mV.

Ÿ NARROW mV - Calibrates the millivoltmeter for TC/mV inputs between -11.00 mV and 26.00 mV

Ÿ CURRENT SOURCE - Calibrates the transmitter’s current source that supplies a forcing current to

RTD/Ohm sensors.

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Siemens Pacemaker UM344-2 Manual de usuario Pagina 103