Page 31 - 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
resistance may cause measurement errors. 3) When shielded cable is used, it should be
Fig. 6
mA, mV
AND V INPUTS WIRING
grounded at one side only to avoid ground loop
NOTE:
1) Don’t run input wires together with power
currents.
4) The resistance of the 3 wires must be the
cables.
2) Pay attention to the line resistance; a high line
same.
4
9
_ G
mV or V
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:
Less than 5 W for 20 mAdc input
Greater than 1 MW for 60 mVdc input Greater than 400 KW for 5 Vdc and 10 Vdc input
_
or V
Shield