Omega Engineering CN3271 Series, User Manual

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4
8
RTD
10 9 8
RTD
10 9
RTD INPUT RTD INPUT RTD INPUT RTD INPUT RTD INPUT
Fig. 5 RTD INPUT WIRING
NOTE NOTE NOTE NOTE 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.
LINEAR INPUT LINEAR INPUT LINEAR INPUT LINEAR INPUT LINEAR INPUT
Fig. 6 mA, mV AND V INPUTS WIRING
NOTE NOTE NOTE NOTE 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:
Less than 5
Ω
for 20 mAdc input
Greater than 1 M
Ω
for 60 mVdc input
Greater than 400 K Ω for 5 Vdc and 10 Vdc
input
Shield
_
+
mA,
mV
or
V
9
+
_
G
mA
mV
or
V
10
9
10
LHL-1-NEUTRO.pmd 19/04/2004, 15.07 4