JB Academy, JB Nova and SUB Aqua Pro 31394 V7
Detailed operating manual Page 8
www.grantinstruments.com
6 Operating procedures
6.1 Operation
6.1.1 Water level
The bath will provide optimum performance when filled to the swage line which is
typically 25mm below the top of the tank.
Do not fill above the swage line.
The water level used in the tank will influence the temperature accuracy and stability.
Using liquid levels below the swage line needs consideration, especially when operating
at higher water temperatures (>50ºC) and without a lid. We recommend the following
minimum fill levels
Tanks size Recommended
min % fill
Approximate water
depth (mm)
2L
40%
50
18L 50
34L 70
Table 1 - Recommended minimum fill levels
When using a larger bath with vessels which only require a shallow immersion, we
recommend filling the bath as close to the swage line as possible and using raised
shelves in the bath to elevate the vessel to the desired immersion depth.
6.1.2 Operating the bath without water (,)
Do not attempt to use your bath without water in the tank. The bath has an inbuilt
protection mechanism known as dry start protection which will detect this condition in
most circumstances and prevent the bath from continuing to heat. In this instance the
bath will display and sound an alarm.
The tank internal surface can become very hot if an accidental dry start
has occurred, even if the dry start cut out has operated. Avoid touching
the tank until it has been left to cool for several minutes.
Once you have filled the bath, you will need to switch the bath off and on in order to
resume operation.
Repeated dry starting of the bath stresses key components in the bath
which can affect service life and the equipment’s warranty.
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