Electrical Test Instruments PI-2500-G2 and PI-5000-G2
Section V - Service Information and Documentation
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SECTION V
SERVICE INFORMATION AND DOCUMENTATION
MAINTENANCE AND CALIBRATION OF THE PI-2500 and PI-5000
The PI-2500 and PI-5000 require only minimal maintenance. Mechanical
components such as casters and hinges may need periodic lubrication. External
surfaces should be kept clean, and screws on access panels should be checked
for tightness. The output stab adapter plates and interconnecting bus
connections must be kept clean and smooth, and studs should be maintained
in good condition. Poor output connections are the main cause of overheating
and poor performance.
Occasionally, or more often if used in dusty environments, it is important to
inspect and clean interior components. Disconnect from all sources of power
and remove all access covers. Carefully blow out any dust and inspect all
connections for tightness and any sign of deterioration due to corrosion or
overheating.
The fans should be cleaned with a damp rag and checked for signs of bearing
wear by spinning.
Vernier brushes should be inspected for signs of wear or overheating and
cleaned or replaced as required.
Calibration of the PI-2500 and PI-5000 requires accurate current measurement
in 1000A, 2000A, and 4000A connections. Adjustment may be accomplished by
means of the potentiometers accessible through the PI-2500 output face plate.
Special Calibration Instructions
The pots on the configuration switch PCB are used to adjust the calibration for
1000A, 2000A, and 4000A modes. They should be set so that the readings are
one half or one fourth the readings in full parallel configuration.
The MAC-21 should be calibrated for its standard input value.
