Connection; Electrical Connection; Terminal Connection Diagram - ECOLAB MULTRONIC Bedienungsanleitung

3

Connection

3.1

Electrical connection

CAUTION
3.1.1

Terminal connection diagram

Electrode
Signal+
2. Shield
cable
Contact controller enabling closed ⇒ controller active
417101804_Anhang03_pH.doc
Always use a shielded probe cable. A double shielded cable must be used for the
cable connection to the electrode for a distance of more than 2 m.
It is recommended to implement an impedance converter (Material-No. 418853005)
for distances of more than 5 to 10 m between measuring chain and measuring
device. A single shielded cable can be used again in this case.
The maximum length of the cable should not exceed 50 m.
Electrode cables must not be placed into one cable duct together with mains leads.
pH-electrodes are subject to ageing and must be inspected at regular intervals.
The 3-wire connection system should be used if a Pt 100 is connected for
temperature compensation.
pH – Measurement Amplifier
K61 K62 K63 K64
Electrode
Signal/COM
Core 1.Shield
cable cable
pH probe
pH Measuring Module
K65 K66 K67
Temperature compensation
Input COM
Pt 100 2 Leads
brown white
Pt 100 3 Leads
Terminal arrangement
- 34 -
K68 K69 K70
Controller
Reference Enable
Enable
green
Rev.: 07-07/10