Additional Features Of The Tc120; Setting The Over-Temperature Thermostat; Setting A Countdown Timer - Grant Optima Serie Manual De Instrucciones

5.3

Additional features of the TC120

5.3.1 Setting the over-temperature thermostat

An over-temperature cut-out dial with a temperature scale is located at the top right of the
unit. The over-temperature probe independently monitors the bath temperature and
switches the heater off if it goes above the cut-out threshold. The T100 temperature cut-
out threshold is fixed at 110 °C. For the TC120, the temperature cut-out threshold can
be adjusted for convenience.
Coarse setting of the over-temperature thermostat
Rotate the temperature cut-out dial in line with the marked scale to the desired setting.
This should be higher than the set temperature to avoid operating the cut-out before the
set temperature has been reached.
If the alarm is triggered, it can be cancelled by pressing either the F or S button once.
The unit must then be switched off to clear the cut-out alarm. To continue to use the
TC120, let the bath liquid cool by at least 5°C either naturally or by replacing the liquid,
switch the unit off, wait 10 seconds and switch it on again to clear the alarm. To avoid
nuisance tripping the trip point needs to be set at least 5°C above the desired control
temperature.
Alternative setting of the over-temperature thermostat
Rotate the temperature cut-out dial to maximum (or at least a value above the level
required) and configure the set temperature to the cut-out level required. Leave the bath
to reach the set temperature and stabilise for at least 5 minutes. Turn the cut-out dial
slowly anticlockwise until the alarm lamp comes on and the alarm sounds intermittently.
The display will alternate between showing "Cut" and the liquid temperature. This gives
an over-temperature trip point at the set temperature. The audible alarm can be
cancelled by pressing either the F or S button once.
The unit must be switched off to clear the cut-out alarm. To continue to use the TC120,
let the bath liquid cool by at least 5°C either naturally or by replacing the liquid. To avoid
nuisance tripping the trip point needs to be set at least 5°C above the desired control
temperature.

5.3.2 Setting a countdown timer

The TC120 includes a countdown timer in minutes which triggers an audible alarm on
completion. The timer can be set between 1 minute and 6000 minutes (100 hours).
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 "On" and press the S button to select. The display flashes
with time (in minutes) indicated. Rotate navigator control to set time required.
4. Press the S button to save and return to liquid temperature display with timer
countdown started.
When the countdown clock is set the display alternates between bath temperature and
time remaining in minutes.
When the countdown timer reaches zero the audible alarm will sound and the display will
alternate between the water temperature and "End". The alarm can be accepted by
pressing the either the F or S buttons.
Note: the TC120 will continue to control at the set temperature after the timer
reaches zero – the heater will not switch off.
T100 & TC120
Operating Manual
www.grantinstruments.com
EN
30423 V4
Page 16