Oxford Instruments Mercury iTC, Handbook

Page: 127 / 146

Handbook
November 2011 / 59-UMC0071 / Issue 01
Mercury iTC
Page 127
TEMPERATURE SENSOR DAUGHTER BOARD
Original Instructions
13 TEMPERATURE SENSOR DAUGHTER BOARD
This chapter describes the single and dual temperature sensor boards.
13.1 Overview of the temperature sensor board
The unit can accept the following sensor types:

Negative temperature coefficient (NTC) resistance

Positive temperature coefficient (PTC) resistance

Thermocouple

Silicon diode
Each input can be read at a maximum rate of 10 Hz. The unit can detect short-circuit
inputs, open-circuit inputs, and inputs that are shorted to ground.
The iTC contains a temperature sensor that is used to compensate for fluctuations in
ambient temperature.
13.2 Installing a temperature sensor board
13.2.1 Fitting the board
If a temperature board is not used to control a heater, it can be fitted in any expansion
slot. It is preferable to locate temperature boards in slots that are physically separated
from any heater boards that are fitted.
If a temperature sensor board is to be used to control a heater, it must be fitted in the
correct slot (see
Table 4-5 ).
1 Turn off electrical power to the iTC.
2 Remove the electrical power connector from the back of the unit.
3 Remove the screws that secure the lid of the iTC. There are 6 screws on each side
panel of the iTC and 3 screws on the rear panel.
4 Lift off the lid.
5 Remove the two screws that secure the board-clamp. Remove the board clamp.
Figure 13-1 Board-clamp