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• Power system check: Display of all the system values,
ideal as a wiring check (RS 232 only)
• The simulation of the analogue outputs for test purposes
(RS 232 only)
• Printing of nameplate.
7. Reconfiguring the analogue outputs
The alternative configurations for the analogue outputs can
be seen from Table 1.
Table 1:
Action
Change the current full-
scale value from, for
example, 20 mA to 10 mA
(a hardware setting always
has to be made when
changing from a lower to
a higher value)
Change a current output
[mA] to a voltage output
[V] or vice versa
7.1 Without hardware setting change
The PC software DME 4 (Order No. 146 557) and a pro-
gramming cable (Order No. 980 179) are needed in order to
reprogram the device. The reduced accuracy resulting from
this change can be determined by printing a type label (see
Fig. 12 and 13).
400kV/400V
1000/1.0A
22d+ 22z-
0.25c
A
P
0W
0.0mA
500W
20.0mA
0.25c
14d+ 14z-
C
I1
0.000A
0.0mA
1:
I1
2:
P
R
000
3:
Q
L
4:
S
Fig. 12. Example of a type label with the present 20 mA output
and an accuracy class of 0.25 c.
40
Procedure
Reconfigure the software
but do not change the
hardware setting.
Accuracy is reduced
(see Section 7.1)
Reconfigure the software,
and change the hardware
setting. Accuracy is not
reduced
(see Section 7.2)
Reconfigure the software,
change the hardware
setting and calibrate the
output
(see Section 7.2)
50Hz
3N~
18d+18z-
0.25c
B
U1N
215V
0.0mA
240V
20.0mA
.15+0.03c
10d+10z-
D
F
49.5Hz
0.0mA
20.0mA
RS485
6d
2d
Tx+/Rx+
GND
6z
2z
MODBUS
Tx–/Rx–
1
9600 Bd
400kV/400V
1000/1.0A
22d+ 22z-
0.45c
A
P
0W
0.0mA
500W
10.0mA
0.25c
14d+ 14z-
C
I1
0.000A
0.0mA
1:
I1
2:
P
R
000
3:
Q
L
4:
S
Fig. 13. Example of a type label with the new 10 mA output and
an accuracy class of 0.45 c.
7.2 With hardware setting change
Unauthorized repair of alteration of the unit
invalidates the warranty!
The PC software DME 4 (Order No. 146 557) and a pro-
gramming cable (Order No. 980 179) are needed in order to
reprogram the device.
If modifying hardware range limits of analog outputs you
have to change resistances on the output PCB. The range
limit is realized by means of a resistance, which is separated
in two resistances for better accuracy. The resistances must
be selected for minimized error. The calculation of this values
and the assembling of the other variable components is
shown below. However, the consequence of every hardware
modification is a new output calibration.
Output calibration
With this function you can perform a new calibration of the
analog outputs. You can adjust the outputs to the given
facts of subsequent devices as well. However, you have to
calibrate every output after changing its hardware to achieve
the desired accuracy.
To perform an output calibration you have to connect a
voltmeter respectively ammeter of sufficient accuracy to
the output terminals. On software demand you have to read
measurands and put them to the software. If you adjust the
output for subsequent devices, you have to take the measu-
rands from these devices logically. The new calibration data
will be stored as customer calibration. Any time you can load
the factory calibration separately for each output.
Before performing any output calibration warm up the
device to operating temperature first (min. 30 min. acc. to
DIN EN 60 688).
50Hz
3N~
18d+18z-
0.25c
B
U1N
215V
0.0mA
240V
20.0mA
.15+0.03c
10d+10z-
D
F
49.5Hz
0.0mA
20.0mA
RS485
6d
2d
Tx+/Rx+
GND
6z
2z
MODBUS
Tx–/Rx–
1
9600 Bd
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