Reconfiguring The Analogue Outputs; Without Hardware Setting Change; With Hardware Setting Change - Camille Bauer EURAX DME 424 Betriebsanleitung

Outputs E, F, G and H in the case of EURAX DME 424
and outputs G and H in the case of EURAX DME 442
are available (see Section "Electrical connections").
External power supply: 8 ... 40 V
Output current: ON 10 ... 27 mA
OFF ≤ 2 mA
DME4
Fig. 10. Block diagram for operation of the binary outputs.
6. 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

6.1 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. 11 and 12).
400kV/400V 1000/1.0A
 0.25c 
A 22d+ 22z-
P 0W 0.0mA
500W 20.0mA
 0.25c 
C 14d+ 14z-
I1 0.000A 0.0mA
0.500A 20.0mA
 1.0 
G 6d+ 6z-
P 5000 / kWh
R
Fig. 11. Example of a type label with the present 20 mA output
and an accuracy class of 0.25 c.
+
+
–
–
Procedure
Reconfigure the software, but
do not change the hardware
setting. Accuracy is reduced
(see Section 6.1)
Reconfigure the software and
change the hardware setting.
Accuracy is not reduced (see
Section 6.2)
Reconfigure the software,
change the hardware setting
and calibrate the output (see
Section 6.2)
50Hz
 0.25c 
B 18d+ 18z-
U1N 215V 0.0mA
240V 20.0mA
 .15+0.03c 
D 10d+ 10z-
F 49.5Hz 0.0mA
50.5Hz 20.0mA
 0.25 
H 2d+ 2z-
I1< 0.225A ON
U1N> 233V Ydel=0s
F> 50.0Hz OR
400kV/400V
 0.45c 
A
P 0W
500W
 0.25c
C
I1 0.000A
0.500A
 1.0
G
P 5000
R
Fig. 12. Example of a type label with the new output of 10 mA
and an accuracy class of 0.45 c.

6.2 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/power supply PCB. The
range limit is realized by means of a resistance, which is sepa-
rated 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
3N~
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
EN 60 688).
1000/1.0A 50Hz
 0.25c
22d+ 22z- B
0.0mA U1N 215V
10.0mA 240V
  .15+0.03c
14d+ 14z- D
0.0mA F 49.5Hz
20.0mA 50.5Hz
 0.25

6d+ 6z- H
/ kWh I1< 0.225A
U1N> 233V
F> 50.0Hz
3N~

18d+ 18z-
0.0mA
20.0mA

10d+ 10z-
0.0mA
20.0mA

2d+ 2z-
ON
Ydel=0s
OR
37