M9B-HFS INTERFACE
CALIBRATION
Release 1.0 (97/10)
4-1
4.
CALIBRATION
4.1 Introduction
WARNING
Exercise caution when using and servicing power supplies. High energy
levels can be stored at the output voltage terminals on all power supplies
in normal operation. In addition, potentially lethal voltages exist in the
power circuit and the output connector of power supplies which are rated at
40V and over. Filter capacitors store potentially dangerous energy for some
time after power is removed.
You calibrate the M9B-HFS interface so that signal levels on the interface card correspond to the expected signal
levels on the power supply's main assembly. You may need to recalibrate the interface whenever you install a
new interface board, or, if the unit falls out of specification due to component aging drifts.
You can calibrate the M9B-HFS interface for:
•
voltage program
•
voltage readback
•
current program
•
current readback
•
over voltage protection.
For reading accuracy, perform the calibration procedures in this section at an ambient temperature of 25°C
± 5°C.
4.2 Voltage Mode Calibration
Follow all procedures in the sequence given. Make sure that you are set up as in Section 4.2.1 Voltage
Calibration Setup Procedure
prior to any voltage calibration.
4.2.1
Voltage Calibration Setup Procedure
1. Disconnect any load from the power supply which is to be calibrated.
2. Connect a voltmeter across the power supply’s output terminals.
Figure 4.2-1 Voltage Calibration Setup
Содержание Internal M9B-HFS Series
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