Calibration And Maintenance - Siemens 7MF4333 User Manual

UMSITRPDS3-1

7.0 CALIBRATION AND MAINTENANCE

This section discusses calibration, preventive maintenance, troubleshooting, assembly replacement,
software compatibility, and return shipments.
The Calibration section contains a brief discussion of the cause of position induced zero shift and it
provides references to needed calibration procedures. The Preventive Maintenance portion has procedures
that are employed to protect the reliability of the transmitter. Should a malfunction occur, procedures in
the Troubleshooting section can help minimize downtime. The Assembly Removal and Replacement
section provides step-by-step assembly replacement procedures. Later sections discuss recommended
spare and replacement parts, software compatibility, and return shipments.
Tools and Equipment Required
The procedures in this section can require the following equipment. See the Note below.
•
Model 275 HART Communicator or Model 375 Field Communicator
Note: If using a Model 375 Field Communicator, see the inside
of the front cover of this manual.
•
Laboratory grade digital multimeter (DMM) for troubleshooting and calibrating the 4 to 20 mA
output signal; a meter certified for use in intrinsically safe circuits must be used in an intrinsically
safe installation
Voltmeter Section
Ammeter Section
•
24 Vdc power supply; for bench setup
•
Resistor 250Ω ±1%, carbon, ¼ watt; for bench setup
•
Set of Phillips and flat-blade screwdrivers
•
Set of open-end or box-end wrenches
•
Larger tweezers, 4" to 6"
November 2010
WARNING
Explosion can cause death or serious injury.
In a Division 1 area, where an explosion-proof rating is
required, remove power from the transmitter before
removing either enclosure cap.
Accuracy ±0.01% of reading
Resolution 1.0 mV
Input impedance 10 MΩ
Accuracy ±0.1% of reading
Resolution ±1 μA
Shunt resistance 15Ω or less
Calibration And Maintenance
7-1