Grant Instruments SBB Aqua Plus - Manual (Page 11)

SUB, JB & SBB Aqua Plus 29825 Ver. 2 - July 2010 71W
Operating Manual Page 10
www.grant.co.uk
EN
5.3.3 Setting the sample protection thermostat
The bath is fitted with an adjustable sample protection thermostat to protect the sample.
This device is not a safety feature. The sample protection thermostat can be set to be a
few degrees above the bath set temperature.
1. Turn the knob of the sample protection thermostat to maximum.
2. Set the control temperature to 2°C above the desired operating temperature and wait
for the temperature to stabilise.
3. Turn the knob of the sample protection thermostat slowly anti-clockwise until a click is
heard and „‟ is displayed.
The audible alarm will sound continuously to warn you that the bath is controlling
using the sample protection thermostat.
4. Re-set the control temperature to the desired temperature using the „+‟ and „-‟ keys.
The audible alarm will sound continuously until the primary control system is re-
activated.
In the unlikely event of failure of the primary temperature control system, the sample
protection thermostat will maintain the water in the bath at a temperature a few degrees
above the set temperature and with greater fluctuations. The display will cycle between
„‟ and the actual bath temperature and the audible alarm will sound intermittently. If
this happens, first check that the sample protection thermostat is not set to a lower
temperature than the primary control system. If that is not the reason, the bath can
continue to be used without compromising the safety of persons or the surroundings until
current work is completed. However, it is recommended to have the bath checked by a
competent person as soon as conveniently possible.
5.3.4 Configuring a bath preset
Each bath contains three presets which can be configured to different set temperatures
to allow the bath to be conveniently run at frequently used temperatures. Use the method
below to configure preset 1; other presets can be set in a similar manner.
1. Press preset key „1‟ to activate the preset. The display will flash „ ‟ and then the
current preset set temperature.
2. Use the „+‟ or „-‟ to set the desired temperature.
If no key is pressed for 8 seconds then the display will revert back to showing the
bath temperature and the set temperature will remain at its original value.
3. Press preset key „1‟ to save the preset temperature.
5.3.5 Running a bath preset
To run bath preset 1:
1. Press preset key „1‟ to activate the preset. The display will flash „‟ and then the
current preset set temperature.
2. Press the enter key to run the preset; the bath will heat (or cool) to the requested
temperature.