Micromod Micro-DCI: 53ML5100A LOADING STATION - Manual (Page 47)

5.0 MAINTENANCE
RETAIN THE INSTRUMENT CALIBRATION SHEET
The factory set calibration constants for the analog inputs and analog
outputs are recorded on the instrument calibration sheet. This sheet
should be retained in the event one or more of the constants is
inadvertently changed to the wrong value and field recalibration is
necessitated.
5.1 SERVICE APPROACH
This instrument is a microprocessor based device: data manipulation and sequencing operations
are software controlled. Adjustment, diagnostic testing, and preventive maintenance of the hard-
ware are not required.
Generally, when a process malfunction occurs, it usually manifests itself as an instrument problem
even though it might be a defective process variable monitoring device, remote transmitter, or the
connecting wires. These associated remote devices and the connecting wires should be checked
first to ensure the problem is isolated to the instrument.
If it is determined the instrument is malfunctioning, attempting fault finding analysis beyond the
board level to the integrated circuits (ICs) of the main printed circuit board (PCB) is not recom-
mended, as it requires familiarity with CMOS technology, microprocessor functionality, and the
proper test equipment.
STATIC SENSITIVE
INTEGRATED CIRCUITS (ICs) ARE STATIC SENSITIVE DEVICES AND
CAN BE DAMAGED IF THE PROPER STATIC REDUCTION
PRECAUTIONS ARE NOT IMPLEMENTED WHEN THEY ARE HANDLED.
5.2 PARTS REPLACEMENT
WARNING
ALWAYS REMOVE POWER BEFORE ATTEMPTING TO INSTALL,
DISASSEMBLE, OR SERVICE ANY OF THE EQUIPMENT. FAILURE TO
REMOVE POWER MAY RESULT IN SERIOUS PERSONAL INJURY
AND/OR EQUIPMENT DAMAGE.
WARNING
REMOVE POWER TO THE INSTRUMENT BEFORE DISCONNECTING THE
FRONT DISPLAY.
Access to internal instrument parts is achieved by removing the front display panel. The front dis-
play panel can be removed by inserting a small screwdriver into the notch at the top center of the
display and twisting the screwdriver to depress the retaining latch. The upper sides of the display
are held and pulled forward as the latch is depressed. Disconnect the cable at the rear of the front
display panel from its socket. The other cable end connects to the main printed circuit board.
Section 5. Maintenance
5-1