GARAN EWS-102 Ergänzende Informationen - Seite 2

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GARAN EWS-102 Ergänzende Informationen
5 EWS 102 4-20mA Supplementary Information Garan2.pdf 1 17/05/2016 14:32:24
4-20mA Loop Fine Tune Adjustment
The current loop output is proportional to the elevator load including any attached chain (4mA when empty to 20mA when at capacity).
Although the unit provides an accurate output without the need for any adjustment, this procedure offers a quick and simple means of
measuring the output using a multi-meter connected in series with the 4-20mA Loop output terminals, and without having to monitor the
sensor. The output can also be re-tuned during the process, if required.
Connect the multi-meter as shown below:
Control
Signal
C
M
Y
CM
MY
CY
CMY
K
Control
4-20mA
Signal
Loop
Cal
Load
Model EWS 102
Elevator Load Weighing Device
12-24VDC
1
Power Supply
Rev 2.1 subject to alteration
Do not connect the meter across the 4-20mA output.
This may result in a blown fuse in your meter.
4-20mA
Loop
4-20mA Output to Elevator Drive Unit
Common Ground
Fine Tune Procedure
Zero
3
2
Operating Mode
Controller/Driver Input
Operating Mode
To enter the test and fine tuning procedure,
press the
about a second and then release it (unit beeps
again).
To go straight to the Loop output test, press
4mA output. At this point, the meter should measure
4mA exactly. If necessary, press to enable fine tuning
or press to move to the 20mA setting. To adjust
the 4mA output, use the
the displayed 3-digit value. Once adjusted, save it by
pressing
.
The meter should now measure 20mA exactly. If
necessary, press
to enable fine tuning or press to
exit test mode. To adjust the 20mA output, use the
and
buttons to edit the displayed 4-digit value. Once
adjusted, save it by pressing
button (unit beeps), hold it for
and buttons to edit
.
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