Parr Instrument Company 6300, Руководство по эксплуатации

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M
AINTENANCE
& T
ROUBLESHOOTING
6300
9
w w w . p a r r i n s t . c o m
51
B
OMB
R
EMOVAL AND
R
EPLACEMENT
To service or remove the bomb cylinder from the bucket
assembly, remove the 941DD Wedge with needle nose
pliers. Remove the 668DD Check Valve from the bomb
cylinder. Remove the two SA1631RD018 Machine
Screws (see Figure F-20). Then remove the 942DD
Bushings and the 1081DD Quad-ring.
Carefully lift the bucket and bomb assembly out of
the air chamber and position horizontally on the
calorimeter to remove the 925DD Oxygen Bomb
Retainer Nut (see Figure F-19). Now the cylinder can
be removed from the bucket assembly. Note the position
of the locating pin.
To replace, follow these steps in reverse.
6300 C
ALORIMETER
E
RROR
L
IST
The calorimeter will run a number of diagnostic checks
upon itself and will advise the operator if it detects any
error conditions. Most of these errors and reports will
be self explanatory. The following list contains errors
that are not necessarily self evident and suggestions for
correcting the error condition.
Start and Pretest buttons dim.
The Start and Pretest buttons will be dim (not lit) when
the calorimeter is not ready to begin a test or pretest.
When the heater and pump are first turned on the jacket
temperature will be less than 30 °C. Once the jacket
temperature reaches 30 °C ± .5 °C it will be another 10
minutes before the Start and Pretest buttons light up.
This is to make sure that all of the jacket water is stable
at the correct temperature.
A Misfire Condition Has Been Detected.
This error will be generated in the event the total
temperature rise fails to exceed 0.5 °C after the first
minute of the post-period and the test run is aborted.
If the cotton thread is gone when the bomb head is
extracted, the thread simply failed to ignite the sample.
In most cases, the sample can be re-run with a new
thread.
If the thread is present, make sure it is dry. If the
thread is dry, it is best to check and/or change the
metal heating wire. If it is wet, replace it and re-run the
sample if no sample has adhered to the wet thread.
The Lid has Failed to Lock or is not Closed Properly.
This error will be reported when the controller fails to
detect continuity through the bomb ignition circuit.
The most probable cause will be either a poor electrical
connection between the bomb’s internal electrodes and
the fuse wire, carbon build up on the electrodes or a fuse
wire that has burned out.
The heater loop break limit has been detected. The
heater will now be shutdown.
This error means that the calorimeter is trying to heat
the water in the unit for an extended period of time.
The calorimeter suspects that there is a short and shuts
the system down in order to “save” itself. This is a fairly
normal occurrence if the lab temperature is very cool
at night. It is acceptable practice to ignore the warning
and re-start the unit. However, if this error occurs
more than three times in a row, then it may be a true
thermistor problem and the user should contact Parr
Technical Service.
A Preperiod Timeout Has Occurred.
The calorimeter has failed to establish an acceptable
initial temperature, prior to firing the bomb, within the
time allowed. Possible causes for this error are listed
below:
907DD failing (check valve head)
•
Poor jacket water circulation due to a kinked hose
•
or insufficient water in the tank.
A bomb leak.
•
Poor bucket stirring.
•
Leaking bucket water solenoid.
•
Metal to metal contact between the bucket and the
•
jacket.
• Lid not tight may be high in back.
Could Not Cool the Bomb Successfully.
The calorimeter has failed to establish the desired cool
down temperature within the time allowed. See Jacket
Fill and Cooling Problems section on page 47.
The Current Run Has Aborted Due To Timeout.
The calorimeter has failed to establish an acceptable
final temperature within the time allowed. Possible
causes for this error are listed below:
Poor jacket water circulation due to a kinked hose
•
or insufficient water in the tank.
A bomb leak.
•
Poor bucket stirring.
•
Leaking bucket water solenoid.
•