WPI Biological Signals Amplifier, Instruction Manual, Page: 11 / 16

Biological Signals Amplifier
World Precision Instruments 7
Calibrating the Temperature Sensor to the TH Module
1. In an insulated container, prepare 2–3L of water or fluid at about 20ºC. In a
second insulated container prepare 2–3L of water at a higher temperature,
about 40ºC.
2. Put a precision thermometer (0.1ºC) through the lid of each insulated container
so that the bulb of the thermometer is in the middle of the container. Leave an
opening on the lid of each container for the temperature sensor.
3. Place the temperature probe into the cooler fluid. Place the tip of the probe as
close to the bulb of the thermometer as possible without touching it.
4. Turn the 3-way program switch to the MEAS position. Wait until the
temperature reading on the TH module stabilizes. Then, read the temperature
on the thermometer. Set the 3-digit
display to the temperature of the
thermometer by adjusting the
LOW
potentiometer on the front of the TH
module.
5. Repeat Steps 3 and 4 for the warmer
fluid in the other insulated container.
Since the temperature of the fluid
is warmer, adjust the 3-digit display
to read the temperature of the
warmer fluid by adjusting the
HIGH
potentiometer. The TH module and
sensor is now set and calibrated for a
range of 20–45ºC.
Fig. 7—(Right) The TH temperature sensor.