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EPS Stromversorgung GmbH
Alter Postweg 101 • 86159 Augsburg
Germany
PSI 9000 3U Series
Fon: +49 821 / 570451-0
Fax: +49 821 / 570451-25
►
How to calibrate the output 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 ~8 A, and 0 V (if the load is electronic).
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
, 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 output current
1.
Set the load to approx. 102% nominal current of the PSI device, for the example 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
, 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 your shunt. Enter
it using the keypad and 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 calibrate this feature 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 output voltage for remote sensing
1.
Connect a load and set its current to approx. 5% of the nominal current of the power supply, in this example
~8 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.
In 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 your 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!
