User Guide

6
The wire between the transmitter and the
recorder/indicator/controller should be a PVC
insulated two wire with a wire diameter of at
least 0.7 mm. This wire is fed through one
of the smaller cable glands. The maximum
distance between the power supply and the
amplifier is 300 m (1000'). It is not neces-
sary to use shielded cable. The transmitter
is protected against inversion of supply volt-
age.
Electrode connection: con-
nect the BNC of the cable to the
BNC socket on the transmitter.
For HI8614 & HI8614L only:
for automatic temperature
compensation, connect the 2
terminals of the temperature
probe (HI76608, optional) to
"TEMP. PROBE" terminals.
If automatic temperature com-
pensation is not required, short
the "TEMP. PROBE" terminals
with a resistance according to
the external temperature:
Temperature (°C) Resistance (Ohms)
0 1634
10 1774
20 1922
30 2078
40 2242
50 2412
60 2590
A 2 kohm resistor is factory mounted for 25°C
temperature compensation.
INPUT
-VE LO
O
P
+VE LO
O
P
TEM
P
. PRO
B
E
INPUT
-VE LO
O
P
+VE
LO
O
P
TEM
P
. PRO
BE
INPUT
-VE LO
O
P
+VE LO
O
P
TEM
P
. PR
O
BE