Chromalox TEMPERATURE CONTROLLER 1604-7 - Manual (Page 7)

4
LINEAR INPUT
Fig. 6 mA, mV AND V INPUTS WIRING
NOTE:
1) Don’t run input wires together with power
cables.
2) Pay attention to the line resistance; a high line
resistance may cause measurement errors.
3) When shielded cable is used, it should be
grounded at one side only to avoid ground loop
currents.
4) The input impedance is equal to:
< 5 W for 20 mA input
> 1 M W for 60 mV input
> 200 k W for 5 V input
> 400 k W for 10 V input
RTD INPUT
Fig. 5 RTD INPUT WIRING
NOTE:
1) Don’t run input wires together with power
cables.
2) Pay attention to the line resistance; a high line
resistance may cause measurement errors.
3) When shielded cable is used, it should be
grounded at one side only to avoid ground loop
currents.
4) The resistance of the 3 wires must be the
same.
8
RTD
10 9 8
RTD
10 9
Shield
_
+
mA,
mV
or
V
9
+
_
G
mA
mV
or
V
10
9
10
1604-7-1-AB.p65 5/16/00, 10:50 AM 4