Cancelling The Timer; Locking & Unlocking The Control Panel; Single Point Calibration; Twin Point Calibration - Grant GLS Aqua 18 Plus Mode D'emploi

5.2.9 Cancelling the timer

The countdown timer can be cancelled by using the instructions above but using the '-'
key to reset the value to zero. Use the enter key to confirm that you wish to clear the
timer.
5.2.10 Locking & unlocking the control panel
The keys on the front panel can be locked to prevent settings being accidentally changed
or modified. The front panel will display „
panel is locked.
The control panel can be locked by pressing the enter and „+‟ keys simultaneously for at
least 3 seconds. The display will show „
control panel can be unlocked by pressing the enter and „-‟ keys simultaneously for at
least 3 seconds. The display will show „

5.2.11 Single point calibration (

The display of set temperature and actual temperature is accurate to within 1°C at 37°C
but may be up to 5°C out at maximum temperature. Single point calibration allows the
bath to be adjusted to be accurate to ±0.1°C at a single temperature.
1. Press the enter key to enter the menu. The display will show „
2. Use the „+‟ or „-‟ keys to navigate to '
3. Press enter key to select calibration; the display will flash with the current offset
value.
4. Use the „+‟ or „-‟ keys to set an offset correction value (positive or negative) as
measured by a thermometer.
If no key is pressed for 8 seconds then the display will revert back to showing the
bath temperature and the calibration will remain at its original value.
5. Press the enter key to store the new corrected set temperature.
The display will show the corrected bath temperature.

5.2.12 Twin point calibration (

The bath can also be calibrated using a twin point method to give you a linear correction
over the full temperature range. The process consists of three steps:
1. Set low point calibration value.
2. Set high point calibration value.
3. Confirm calibration settings.
The bath is not calibrated until all three steps have been completed. The greater the
difference between the low and high points, the better the calibration will be.
Low calibration point (
1. Set the bath to a temperature between 20°C and 40°C and allow the bath to stabilise,
indicated by the display not fluctuating by more than 0.2°C.
2. Measure the temperature of the water with a calibrated thermometer and make a
note of this reading.
3. Press the enter key. The display will show „
4. Use the „+‟ or „-‟ keys to navigate to „
5. Use the „+‟ or „-‟ keys to navigate to „
6. Using the „+‟ or „-‟ keys adjust the display until the value displayed is the same as the
reading taken earlier.
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‟ if any buttons are pressed and the control
‟ to confirm that the keypad has locked. The
‟ to confirm that the keypad is operational.
)
'.
)
)
‟ and press the enter key.
‟ and press the enter key.
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'.
‟.
GLS Aqua Plus
Operating Manual