Grant Instruments TC120 Operating Manual - Manual (Page 18)

30423 V3 T100 & TC120
Page 17 Operating Manual
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5.3.3 Cancelling the timer
The countdown timer can be easily cancelled.
1. Press the F button twice – the display will show “Cloc”.
2. Press the S button to select.
3. Use the main dial to select “Off” and press the S button to select. The display will
revert to the bath temperature and the timer will be cancelled.
5.3.4 Setting a high temperature warning alarm
The high temperature alarm sets a warning buzzer to sound if the bath temperature
exceeds a defined level.
1. Press the F button three times – the display will show ”Alar”.
2. Press the S button to select.
3. Use the main dial to select “On” and press the S button to select. The display flashes
the high temperature alarm value. Rotate the dial to set the high temperature alarm
required.
4. Press the S button to save and return to liquid temperature.
If the high temperature alarm value is exceeded then TC120 will sound the buzzer
intermittently and show “-Al-” on the display. The alarm can be acknowledged by
pressing either the F or S buttons. However, the alarm is persistent and will trigger again
if the temperature still exceeds the high temperature value. The alarm can be cancelled
by following the steps above but using the dial to select “Off” in step 3 and pressing the S
button to confirm.
Note: the high temperature alarm will not switch off the heater.
5.3.5 Selecting liquid type
The liquid type determines the limits of the set temperature range.
1. Press the F button four times – the display will show the current liquid type.
2. Use the main dial to select the required liquid.
3. Press the S button to set the liquid type and return to normal temperature display.
Selection of the liquid types below changes the settable range as follows:
Liquid Set temperature range
H2O 0°C to 100°C
Oil 0°C to 120°C
LTL* -20° to 50°C
* LTL = low temperature liquid, for example 50% water/50% glycol