Grant Instruments LTC2 - Manual (Page 16)

30933 V2 LTC2
Page 15 Operating Manual
www.grantinstruments.com
Setting the high temperature offset
1. Adjust the set temperature to the required high temperature calibration point.
2. Allow the unit to stabilise for at least 5 minutes after a stable temperature condition
has been achieved.
3. Measure the liquid temperature by placing a reference thermometer into the centre of
the bath.
4. Press the F and S buttons simultaneously for approximately 5 seconds until “LCAL” is
shown.
5. Rotate the dial until the display shows “HCAL” and press the S button to select.
6. Use the main dial to update the display to show the temperature on the reference
thermometer.
7. Press the S button to store the temperature.
Press the F button to cancel the calibration.
5.2.11 Restoring factory calibration settings
The restore factory calibration allows the unit settings to be reset if there is a problem
during calibration or you wish to cancel any of the calibration settings.
1. Press the F and S buttons simultaneously for approximately 5 seconds until “LCAL” is
shown.
2. Rotate the dial until the display shows “rST” and press the S button to select.
3. Press the S button four times (the display will show “Con.3”, “Con.2”, Con.1” and
sound the buzzer to confirm the factory reset has been completed.
5.2.12 Adjusting display brightness
The brightness of the display can be adjusted over a limited range (20% to 100%) if
required.
1. Press F and S buttons simultaneously for approximately 5 seconds until the display
shows “LCAL”.
2. Rotate the dial until the display shows “disP” and press the S button to select.
3. Rotate the dial between the settings and select required brightness
The displayed values show the display brightness
4. Press S button to save the value.
5. Press F button to return to the normal temperature display.
5.2.13 Setting a countdown timer
The LTC2 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.