Calibration and Troubleshooting
5-2 TM-F1OP-C1XN-01
Introduction
Adjustments to programming and readback accuracy for the power supply
are made using cover-off procedures which must be performed by a
service technician.
Calibration Setup
Service Environment and Precautions
• Follow established antistatic procedures.
• Work at a bench with adequate room and support for the test unit and
for all equipment required.
• To reduce shock hazard, use only an insulated, straight-bladed
screwdriver when calibrating trim potentiometers.
• NEVER calibrate these units alone. Ensure that someone is present
who can help should an accident occur.
Equipment Required
You will need the following equipment when calibrating your power
supply.
• 5 1/2-digit true RMS voltmeters (DVMs) (±0.05% accuracy) with test
leads
• Current shunt 1 mV/AMP (±0.25%) and connecting wire. The
recommended current ratings for the DC shunt and connecting wire
must be at least 10% greater than the power supply’s output current
rating. See also Table 2-4 on page 2–14.
• Non-conducting, straight-bladed screwdriver
WARNING: High energy and high voltage
Exercise caution when using and calibrating a power supply. High energy levels
can be stored at the output voltage terminals on a power supply in normal
operation. In addition, potentially lethal voltages exist in the power circuit and on
the output and sense connectors of a power supply with a rated output greater than
40 V. Filter capacitors store potentially dangerous energy for some time after
power is removed.
TM-F1OP-C1XN-01.book Page 2 Thursday, October 25, 2007 9:04 PM
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