ROTRONIC ATEX - Manual (Page 14)

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6. Maintenance and service
6.1 General
The following comments and charts of this chapter refer to the combined humidity and temperature transmitter. They are also applicable
on measuring transmitters, which measure only one of the parameters.
6.2 Service plug
For the display of humidity and temperature during service works, all transmitters of the series HygroClip IC–EX, ID–EX,
IE–EX, and IW–EX contain a 5-pin service plug on the print. This print socket is accessible after removing the cover plate. Together
with the service cable obtainable as spare parts, the signals can be led onto a display instrument (Art.No. AC 1628).
Attention!
The necessary accessories for the calibration adjustment are not approved for hazardous areas.
In case the transmitter is faulty,it has to be sent to ROTRONIC Switzerland for repair because a special test is required.
This is not necessary for the exchange of a humidity or a temperature sensor.
6.3 Check of the humidity transmitter
We recommend to subject the humidity transmitter periodically to a check. (Calibration and/or adjustment).
Under normal conditions a check every 1 to 2 years is sufficient.
Definition: Calibration = Check measurement with a reference value (e.g. ROTRONIC Humidity - Standard)
Adjustment = New-adjustment to a reference value.
6.3.1. Comparison Measurement on site with ROTRONIC reference probe
Material required: - reference probe
- service cable (Art. no. AC1628)
- handheld instrument HygroPalm2 or 3
We recommend that you check the reference probe beforehand with our humidity standards and adjust it,
if necessary. For the proceeding, please consult the operating instructions of theHygroPalm
Arrangement
A
Operation of the HygroPalm according to HgroPalm
Operating instructions Menu ADJ REF, section 7
+
_ 1
2
B4 B3 B2 B1
1
Connector 5-pole situated on the print
AC1628
Transmitter
probe
Reference probe (HygroClip)
☞
For adjustment- and calibration purposes, the device must be
removed from the EX-zone, because the accessories needed
for these are not ATEX-approved.
The transmitter must be supplied with
10 VDC via the terminals.
Terminal 1: GND
Terminal 2: +10 VDC