West Control Solutions MRC 7000 Recorder Manual - Manual (Page 10)

10
FIGURE 2-2
FIGURE 2-3
2.5.2 SENSOR PLACEMENT (THERMOCOUPLE OR RTD)
Thermocouple lead resistance should not exceed 300 ohms. It this is exceeded, instrument
accuracy could be affected.
Two wire RTD's should be used only with lead lengths less than 10 feet.
If the temperature probe is to be subjected to corrosive or abrasive conditions, it should be
protected by the appropriate thermowell. The probe should be positioned to reflect true
process temperature:
In liquid media - the most agitated area.
In air - the best circulated area.
Inductive
Load
R C
MOV
Coil
0.5
mfd
1000V
220
ohms
115V 1/4W
230V 1W