12
• Electrode: Connect the pH or ORP electrode to the BNC
socket (#1 at page 9) .
To benefit from the differential (symmetrical) input, con-
nect the proper electrode wire (if available) or a cable with
a potential matching pin (grounding bar) to the relevant
terminal (#2 at page 9) and enable the differential input
through the setup code I .04 .
Note
When it is not possible to immerse the Potential Matching Pin
together with the pH electrode in the solution (asymmetrical
input), disable the differential input through the setup code
I .04 . In this case, detach the Potential Matching Pin from
its connector . Failure to do so may cause damage of the
reference electrode .
• Pt 100/Pt1000 Terminals: these contacts (#4 at page 9)
connect the Pt 100/Pt 1000 temperature sensor for au-
tomatic 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/Pt 1000 to
pins 1 and 3, and short pins 2
and 3 with a jumper wire .
If the Pt 100/Pt 1000 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 resis-
tance) and one wire from the
other end to pin 1 . Leave the fourth wire unconnected, if
present .
Note
The instrument automatically recognizes the sensor type
(Pt100 or Pt1000) .
• Analog Outputs: when using shielded cable, if the shield
is not connected at the other end of the cable, then con-
nect it to the “+” terminal, otherwise leave it floating .
All cables connected to rear panel should end with cable
lugs .
A circuit breaker (rated 10A max .) must be connected in
close proximity to the equipment, and in a position easy to
reach by the operator, for disconnection of the instrument
and of all the devices connected to the relays .
Содержание HI 504
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