User manual

LABKON Series
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GMC-I Messtechnik GmbH 15
2.9 Output Checkout
The output checkout is to ensure that the power supply develops its rated outputs and properly responds to various
operations. Specific steps are shown as followings:
2.10 Voltage Output Checkout
1. Turn on the power supply.
Press the “Power-on” button, and let the power-on check finish. Usually the power supply will go into the
power-on / reset state automatically. “OFF” will be shown in the lower right corner of the display and both
the output voltage and current are 0.
2. Enable the outputs.
Press the “OUT on/off” button to turn on the power supply outputs. Now the display is in monitor mode; the
“CV” and “ON” annunciator in the lower right corner of the display is lit. At the same time a 5-digit voltage
meter and a 5-digit current meter are displayed, respectively showing the actual value of output voltage
and current of the power supply.
3. Check if the voltmeter properly responds to knob control on front panel of the supply.
Knob Checkout
When the power supply output is on and the display is in monitor mode, move the blinking digit to voltage
value displayed by pressing the key “Left”. Turn the knob clockwise or counter clockwise to check that the
voltmeter responds to knob control to increase or decrease and the ampmeter indicates nearly zero.
Key Checkout
When the power supply output is on and the display is in monitor mode, press key “VSET”, the voltage
setting value in the LCD will blink. Press the number keys on front panel directly to set voltage value
needed. Then press “Enter” to verify and to finish setting and go back to monitor mode. This process is to
check that the voltage value displayed responds to the key operation correctly.
4 Check if the voltage can be adjusted from zero to the maximum rated value.
Adjust the knob until the voltmeter indicates 0V and then adjust the knob gradually until the voltmeter
indicates the maximum rated value with the method explained in last step. At the same time check if the
voltmeter and output voltage changes as voltage changes.