Maintenance; Sensor Replacement - Kemper CONTROL-PLUS Operating Instructions Manual

EN
Sensor solely for flow and temperature measurement with Pt1000, 4-conductor up to
max. 300 m cable
(only Figure 138 4G)
•
max. 300 m cable
• Cable: 7 x 0.34 mm² symmetric star quad twisted and shielded
•
BMS / DDC evaluation: Frequency input card 5VDC, Pt1000 4-conductor input card
5
The KHS flowmeter valve is not essentially subject to any prescribed maintenance. As the device
concerned is a measuring sensor, an annual visual inspection is recommended, removing deposits
with a soft brush, if required (see also section 6). It is essential to avoid damaging the damming
body and measuring paddle.
6
22/ 24 – K41001384G001-00 – 07.2020 – © www.kemper-olpe.de
Also attach shield to GND
During temperature measurements as 2-conductor, the measurements are
falsified by the cable resistance. With a 10 m 0.34 mm² cable, the falsification
could be about +0.5°C.

Maintenance

Sensor Replacement

In the junction box, distribute both loose Pt1000-2
line strands from cable Figure 138 00 012 in Pt1000
4-strands. Place two each strands on T1 and T2!
After removing the protective caps from the top side of
the shell and the side openings (anti-pollution knobs),
the sealing ring can be dismounted using a pair of pliers.
Extract the shim rings and the spring washer and eject
the sensor, using two screwdrivers through both the side
openings, pressing it through the shell towards the top.
Check that the shell is free from dirt or damage before
inserting the new sensor, washer and rings in reverse
order.