10
• Power Supply: Connect a 3-wire power
cable to the terminal strip, while paying
attention to the correct line (L), earth (PE)
and neutral (N) terminal connections.
Power: 115VAC - 100 mA / 230VAC - 50 mA
Line Contact: fused inside 400 mA.
PE must be connected to ground; leakage current 1mA.
• Electrode: Connect the pH or ORP electrode to the BNC
socket (#10 at page 7).
To benefit from the differential input, connect the proper
electrode wire (if available) or a cable with a potential
matching pin (grounding bar) to the relevant terminal (#9
at page 7).
Note
When it is not possible to immerse the Potential Matching
Pin together with the pH electrode in the solution, disable
the differential input by connecting the Connection for Po-
tential Matching Pin (#9 at page 7) with the Connection for
Electrode Reference (#8 at
page 7) with a jumper wire.
• Pt 100 Terminals: these contacts (#7 at page 7) connect
the Pt 100 temperature sensor for automatic temperature
compensation of pH measurement. In the case of shielded
wire, connect the shield to pin 4.
In the case of a 2-wire sensor
connect the Pt 100 to pins 1 and
3, and short pins 2 and 3 with a
jumper wire.
If the Pt 100 has more than 2
wires, connect the two wires of
one end to pins 2 and 3 (pin 2 is
an auxiliary input to compensate
for the cable resistance) and one
wire from the other end to pin
1. Leave the fourth wire unconnected, if present.
• Power Supply Output: these terminals
p5 Vdc and -5 Vdc signals to
supply power to amplified electrodes.
Note
All cables connected to rear panel should
end with cable lugs.
