Page 67 - M1-12 Ops Manual McMurdo 2016

RTD INPUT
LINEAR INPUT
RTD
RTD
10 9
+ mA, mV
8 9 10
8 9 10
10 +
mA
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
Fig. 6 NOTE:
mA, mV
AND V INPUTS WIRING
resistance may cause measurement errors. 3) When shielded cable is used, it should be
1) 2) 3)
Don’t run input wires together with power cables.
Pay attention to the line resistance; a high line resistance may cause measurement errors. When shielded cable is used, it should be grounded at one side only to avoid ground loop currents.
The input impedance is equal to:
< 5 W for 20 mA input
> 1 MW for 60 mV input
> 200 kW for 5 V input
> 400 kW for 10 V input
grounded at one side only to avoid ground loop
currents.
4) The resistance of the 3 wires must be the
same.
1604-1-BC.p65
4
5/16/00, 10:25 AM
4
4)
9
_ G
mV or V
_
or V
Shield