GW Instek PSM-Series User Manual - Manual (Page 27)

PSM-SERIES PROGRAMMABLE POWER SUPPLY
USER MANUAL
⎯ ⎯
47
2) The calibrated devices:
For general calibration, user can select the suitable calibration devices
by their own. Please refer to the below recommendation:
A. Electronic Load
In order to meet the demand of the auto calibration, the Electronic
Load with GPIB is well recommended. The main function of the
Electronic Load is to control the short test (CC current calibration),
the connection test (voltage load regulation, transient response
time) and open test( CV voltage calibration).
Measurement Techniques
Assure a precise Load regulation, Voltage peak to peak, and
transient response time, the test joint point must be configured to
sampling terminals of S+ and S-.
B. Current Monitoring Resistor
The resistor must have sufficient Watt value that can meet the
calibration need to control the change amount less than 15mA
when a 20.00A current run over it for a long period.
C. DVM or RMS Voltmeter
The meter used for the output voltage measurement should have
0.1mV resolution (accuracy: 0.01%). For the output current
measurement, the meter should have 0.001mV resolution(accuracy:
0.01%) to measure the voltage of the shunt, then transfer it to the
corresponding current value.
PSM-SERIES PROGRAMMABLE POWER SUPPLY
USER MANUAL
⎯ ⎯
48
D. Oscilloscope
To test the voltage noise and output oscillator when the power supply
is in the CV and CC mode.
E. Person Computer (PC)
This is a supplementary tool for the auto calibration including interface
card and auto calibration software of its own.