User Manual

Page 81
EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
PSI 9000 3U Series
► How to calibrate the voltage
1. Connect a multimeter to the DC output. Connect a load and set it to
approx. 5% of the nominal current of the power supply as load current,
in this example ~8 A.
2. In the display, tap MENU, then „General Settings“, then go to Page 5
and then tap START.
3. In the next screen select: Voltage calibration. The power supply
will switch the DC output on, set a certain output voltage and start to
measure it (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).
Should the externally measured value be too different from the internally measured value (U-mon), then the cali-
bration procedure will fail and the parameter can not be readjusted by the user.
► How to calibrate the current
1. Set the load to approx. 102% nominal current of the PSI device, for the sample model with 170 A this would
be 173.4 A, rounded to 174 A.
2. In the display, tap MENU, then „General Settings“, then go to Page 5 and then tap START.
3. In the next screen select: Current calibration. The device will switch on the DC output, set a certain current
limit while loaded by the load or sink and start to measure the output current (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).
Should the externally measured value be too different from the internally measured value (I-mon), then the cali-
bration procedure will fail.
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 it to approx. 3% of the nominal current of the power supply as load current, in this
example ~5 A. Connect the remote sensing input (Sense) to the load with correct polarity.
2. Put external multimeter in DC connection on the load.
3. In the display of the PSI tap MENU, then „General Settings“, then go to Page 5 and then tap START.
4. In the next screen select: Sense volt. calibration
5. 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.
6. 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!