User manual

Page 86
PSI 9000 2U Series
www.elektroautomatik.de
[e-mail]
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
► How to calibrate the voltage
1. Connect a multimeter to the DC output. Connect a load and set its cur-
rent to approx. 5% of the nominal current of the power supply, in this
example ~6 A, and 0 V (if the load is electronic).
2. In the display, tap MENU, then „General Settings“, then go to Page 6
and then tap START.
3. IIn the next screen select: Voltage calibration, then Output voltage
calibration and NEXT. The power supply will switch the DC output on,
set a certain output voltage and show the measured value as U-mon.
4. The next screen requests you to enter the measured output voltage from the multimeter at Measured data=.
Enter it using the keypad, that appears when tapping the value. Assure yourself the value is correct and
submit with ENTER.
5. Repeat step 4. for the next three steps (total of four steps).
► How to calibrate the current
1. Set the load to approx. 102% nominal current of the PSI device, for the sample model with 120 A this would
be 122.4 A, rounded to 123 A.
2. In the display, tap MENU, then „General Settings“, then go to Page 6 and then tap START.
3. In the next screen select: Current calibration, then Output current calibration and NEXT. The device will
switch on the DC output, set a certain current limit while loaded by the load/sink and show the measured
output current as I-mon.
4. The next screen requests you to enter the output current Measured data= measured with the shunt. Enter
it using the keypad, assure yourself the value is correct and submit with ENTER.
5. Repeat step 4. for the next three steps (total of four steps).
In case you are generally using the remote sensing feature, it is recommended to also readjust this parameter
for best results. The procedure is identical to the calibration of voltage, except for it requires to have the sensing
connector (Sense) on the rear to be plugged and connected with correct polarity to the DC output of the PSI.
► How to calibrate the remote sensing voltage
1. Connect a load and set its current to approx. 5% of the nominal current of the power supply, in this example
~6 A, and 0 V (if the load is electronic). Connect a multimeter to the DC input of the load and connect the
remote sensing input (Sense) to the DC input of the load with correct polarity.
2. In the display of the PSI tap MENU, then „General Settings“, then go to Page 5 and then tap START.
3. IIn the next screen select: Sense volt. calibration, then Output sense voltage calibration and NEXT.
4. The next screen requests you to enter the measured sensing voltage Measured data= from the multimeter.
Enter it using the keypad, that appears when tapping the value. Assure yourself the value is correct and
submit with ENTER.
5. Repeat step 5. for the next three steps (total of four steps).
After calibration you may furthermore enter the current date as “calibration date” by tapping in the
selection screen and enter the date in format YYYY / MM / DD.
Last but not least save the calibration data permanently by tapping .
Leaving the calibration selection menu without tapping “Save and exit” will discard
calibration data and the procedure would have to be repeated!