Chapter 5
CALIBRATION
5.1 INTRODUCTION
This power supply has been design to be extremely easy to calibrate. A minimum of
tools and instrumentation are required, and all adjustments are made from the front
panel.
5.2 REQUIRED EQUIPMENT
Four items are needed to calibrate the power supply; these are:
1. A 5 ½ digit voltmeter
2. A current shunt rated for the full output current of the power supply with a
minimum accuracy of ¼ of the desired calibration accuracy (.025% to
achieve .1% calibration)
3. A small resistive load of approximately 10% to 50% of the full rating of the
power supply (at full output voltage).
4. Wire of sufficient size to carry the full output current of the supply
5.3 CALIBRATION PROCEDURE
The calibration of the power supply is done by observing the output voltage and the
output current of the supply at two points each. With this data the controller can
determine both gain and zero information. Each step of the calibration is accompanied
by on-screen instructions. It is important to fully complete the calibration procedure once
started or the power supply will not function properly.
To enter the calibration mode, press the MENU key until the Power Supply Calibration
Screen as shown in Figure 5-1 is reached. Press ENTER to begin power supply
calibration.
Figure 5-1
Power Supply Calibration Screen
M550004-01
5-1
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