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BT37 MarkII: Service Manual MA200606 1.0.0
Maintenance and trouble shooting
Sources of unexpected electrical noise could include other laboratory equipment or poor
insulation of wires.
Continue and request customer monitors unit for 7 days. In the event that the issue
persists, send fault template to service@planer.com
In the event of a memory failure:calibration lost alarm message, re-calibrate the
machine. Continue and request customer monitors unit for 7 days. In the event that the
issue persists, send fault template to service@planer.com
In the event of a diagnostics ADC alarm, refer to section 3.
7. Incorrect CO2/pH
There are a number of possible causes of incorrect CO2 levels within the incubation
chamber which could result in a sub-optimal pH value
a. Gas supply
i. Using a handheld CO2 monitor, check the gas in the gas cylinder is at the correct
percentage for the culture media you are using
ii. Check the connection from the cylinder to the incubator for possible leaks (in this
case, a flow alarm should have already been produced ā see 5.0)
iii. Check the internal gas connections within the BT37 (not the humidity system). It is
possible there is a loose/broken connection here. Also check the internal syringe
filter to tightness and correct fitting (again, in the case an alarm should have been
produced by the unit ā see 5.0)
iv. Check the humidity system is correctly installed (specifically, check for physical
obstructions in the tubing which could impair gas flow). (Refer to bottle fitting
guide).
4.2 Gas leak test
In order to establish that there is not a leak between the back of the BT37 and the flow
sensor, a
pressure check should be performed.
Gas Leak Test Method
Ensure that the incubator does not contain samples.
Put the Incubator into "Bottle Change" mode to stop the valves opening.
Referring to Figure 2, connect Gas Leak Tester to Incubator input port.
Important:- When connecting Leak Tester to Incubator Gas Input Port take care not to
over tighten the pre-swaged ferrules into the fitting body. Rotate the nut with a wrench
until a significant increase in resistance is encountered. Tighten a further 1/3 turn.
Ensure that a blanking plug is also fitted to the back of the incubator. If there is more
than one one incubator connected to the same gas supply, use the male/male
connector supplied with the kit to remove one unit from the "Daisy Chain" .
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