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EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
PSI 9000 15U/24U Series
5.3.3.1
Calibrating the set values
►
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 ≈50 A, and 0 V (if the load is electronic).
2.
In the display, tap MENU, then „
General Settings
“, then go to
Page 9
and then tap
START
.
3.
In the next screen select:
Voltage calibration
, then
Calibrate output
value
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
value=
. 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 1020 A this
would be 1040.4 A, rounded to 1040 A.
2.
In the display, tap MENU, then „
General Settings
“, then go to
Page 9
and then tap
START
.
3.
In the next screen select:
Current calibration
, then
Calibrate output value
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 value=
measured with your current
sensor. 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).
5.3.3.2
Calibrating the remote sensing
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
≈50 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 9
and then tap
START
.
3.
In the next screen select:
Sense volt. cali.
, then
Calibrate output value
and
NEXT.
4.
The next screen requests you to enter the measured sensing voltage
Measured value=
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 4. for the next three steps (total of four steps).
5.3.3.3
Calibrating the actual values
The actual values of output voltage (with and without remote sensing) and output current are calibrated almost the
same way as the set values, but here you don’t need to enter anything, just confirm the displayed values. Please
proceed the above steps and instead of “
Calibrate output val.
” select “
Calibrate actual val.
” in the submenus.
After the device shows the measured values on display, wait at least 2 seconds for the measured value to settle
and then tap NEXT until you are through all steps.
