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5.3
TEST THE FAN
This test does NOT apply to the CAL3K-F. This command puts the FAN on.
120
PUT FAN ON
5.4
TESTING FOR OXYGEN LEAKS
CAL3K-AP only : Applies to CAL3k-AP only.
Leaks are easily tested with soapy water, or dishwashing liquid (Bubble water) and a cotton bud.
The oxygen plumbing can be separated in to 3 sections:
5.4.1 TEST OXYGEN SUPPLY
This CAL3K requires a regulated oxygen supply with approx. 33bar max (30bar nominal) as indicated on
the oxygen regulator. A leak on this line is depleting the oxygen bottle, but doesn't influence the unit's
operation:
Check:
Oxygen bottle, regulator with pressure gauge
Optional shutoff valve
Flexible nylon pipe to CAL3K-AP bulkhead or filling station
Flexible nylon pipe from bulkhead to lid or filling head
Filter and throttle jet (not visible)
Open the oxygen bottle and observe that the regulated pressure increases to the prescribed setting.
Then close the bottle and observe that the pressure holds. If it decreases even slightly then you need to
find the leak by putting some 'bubble water' on each joint.
5.4.2 TEST OXYGEN INTERNAL PLUMBING
Replace the filling head nut (grey plastic) with the mushroom look alike blocking device. This blocks the
oxygen feed to the vessel. Insert the vessel WITHOUT the lid in to the well and close the lid. Then
activate command:
94
SYSTEM LEAK TEST
This is a service command to check if the system is leaking. The oxygen must be connected and a vessel
must be in the well, lid closed. Activate the test (YES) and the CAL3K will pressurise the system to the
PRESS LEAK TEST, CMD=99 value. Then it monitors the pressure and displays it. During the test one can
try to find any leak if the pressure is declining. Stop the test with ESC.
Note that the filling is very fast because the volume (no =Vessel) is very small.
Replace the filling nut again. The filling nut is plastic and must be tighten by hand. Do not use tools and
do not 'cross thread' it.
DDS CALORIMETERS OPERATIONS MANUAL V1.1
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2022
Digital Data Systems (Pty) Ltd.
CAL3K Advanced Bomb Calorimeters
www.ddscalorimeters.com
Website:
www.ddscalorimeters.com
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