Parr Instrument 6300 - Manual (Page 50)

9
M
AINTENANCE
& T
ROUBLESHOOTING
P a r r I n s t r u m e n t C o m p a n y 50
J
ACKET
F
ILL AND
C
OOLING
P
ROBLEMS
Jacket Fill Error – A problem has been detected while
attempting to fill the bomb jacket; please correct the
problem and press ‘OK’ to continue…
Error – Could not cool the bomb successfully; check
water supply and drain.
Jacket Fill Error: When the water level in the jacket
drops a level switch closes. This tells the CPU board
(through the I/O board) that more water is needed in
the jacket. If the jacket is still low after 10 minutes this
error will be generated. Pressing ‘OK’ will restart the
jacket fill process. To troubleshoot this error start with
step 3 below.
Cooling Error: At the end of the test cool water is
pumped into the bucket to bring down the temperature
of the cylinder quickly. If it takes too long to cool then
this error is generated.
There are several things to check for this cooling error.
The drain tubing should go straight to the water han-
dling system or sink. The drain works by gravity. If
water backs up in the drain it can cause cooling prob-
lems.
The cooling water could be too warm. The cooling
water should be between 10 and 25 °C. The higher the
temperature the longer it can potentially take to cool the
bomb. The following steps assume that there is a water
handling system present.
Look at the display and note the temperature. The 1.
temperature should not read higher than 25 °C.
Take the top off the water handling system and
2.
look inside. There are two tubes. The shorter tube
should have water coming out of it in a good stream
into the top of the reservoir. If it doesn’t then the
recirculation pump in the water handling system is
bad (A308HWEE). The other tube should go to the
bottom of the reservoir.
Turn off the water handling system.
3.
Remove the tube from the water input at the back of 4.
the 6300.
Get a bucket or point the hose into a sink or some-
5.
thing.
Turn on the water handling system. Water should
6.
be pumped out very quickly (faster than 2 liters/
min). If water does not come out or is not very fast
then the A1418DD output pump on the water han-
dling system is bad. Turn off the water handling
system.
Remove the 1245DD water filter. This is the fitting
7.
that attaches to the tubing that you took off in step
4. See the A1257DD Water Regulator Assembly
figure in Appendix F of the manual for a picture.
Attach the tube from the water handling system to
8.
1245DD water filter.
Turn on the water handling system. Water should
9.
be pumped out at the same rate that you saw in step
6. If the water flow is less than the 1245DD needs
to be cleaned or replaced.
Turn off the water handling system and re-attach
10.
the water filter and tube to the back of the 6300.
Refill the water handling system if it needs it. Turn
the water handling system back on.
Remove the lower cover of the 6300. This will give
11.
a view of all the solenoids and much of the tubing.
Find the A1275DD Cold Water Solenoid assembly.
12.
It is located on the bottom left of the calorimeter as
you face the front. Coming out of the front of this
solenoid is a right angle hose barb and a hose. Fol-
low the hose to the other end (another right angle
hose barb that goes into the jacket reservoir) and
disconnect the tubing there.
Get a beaker capable of measuring 600 ml.
13.
Go to the Diagnostics Menu and then to the I/O 14.
Diagnostics Menu.
Put the head into the calorimeter and lock it in
15.
place.
Turn on the H2O Fill solenoid. After a few sec-
16.
onds (10 seconds or so) water should start to flow
through the disconnected tube.
Time the water flow into the beaker. The water
17.
should flow at a rate of 400 – 600 ml/min. If the
flow is less than 400 ml/min the water regulator
needs to be adjusted. Loosen the 1343DD retain-
ing nut on the 1244DD regulator (note that this is
black plastic on black plastic and may be hard to
see initially). Turn the black plastic slotted screw
clockwise (to the right) to increase the water flow.
Adjust the water flow for approximately 500 ml/
min. Tighten the 1343DD retaining nut (this helps
keep the setting from shifting over time).
Reattach the hose to the hose barb going into the
18.
jacket reservoir.
Reinstall the cover.
19.