Grant Instruments LTC4 - Manual (Page 28)

31115 V1 LTC4
Page 27 Operating Manual
www.grantinstruments.com
3. Rotate the dial to toggle between on/off, press S
to save the selection.
The display returns to the settings screen.
4. Press F to return to the home screen.
5.4
Completing a calibration
The TX150 allows up to five temperature points to be calibrated. The calibration menu
can be accessed by simultaneously pressing the F and S buttons for 3 seconds
The calibration temperatures are constrained by the temperature limits of the liquid type
setting. Calibration should be carried out using a traceable reference thermometer with
an accuracy of at least 0.1°C. This thermometer should be held securely in the centre of
the bath or vessel.
Two factory defined calibration points (20˚C and 70˚C) already exist and are displayed in
the calibrate probe menu, these may be recalibrated if required and up to a further three
calibration points added. Calibration points should be chosen to be at critical
experimental temperatures where accuracy is important or at the extremes of the working
range of used temperatures.
The TX150 calculates the temperature at any point using calculated values that pass
through each calibration point. This ensures precision at all critical experimental
temperatures throughout the range in use. In the example below, 4 calibration points
have been used.
User recorded
Temperature
Measured
Temperature
t3 t4 t2 t1
T4
T3
T2
T1

.

°c
Alarms
Settings
Buzzer
Language
Relay On