Parr Instrument 6200 - Manual (Page 36)

9
Maintenance & Troubleshooting
P a r r I n s t r u m e n t C o m p a n y 34
before the Start button lights 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.
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.
When the heater and pump are initially turned on the
heater will be at 100% power until the jacket tempera-
ture approaches 29.5 °C. Once it gets close the power
being applied to the heater will be cut back to avoid
overshooting the target of 30 °C.
The calorimeter will turn off the heater and pump if
the heater is at 100% power for more than 10 min-
utes. If the jacket water is approximately 21 ºC or less
when the heater and pump is first turned on it is not
unusual to get this error. In this case clear the error
and restart the heater and pump. If the error occurs
again then there could be a problem.
• Check the 2040E Thermostat reset
• Check the water level in the calorimeter
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:
• A bomb leak
• Poor bucket stirring
• Metal to metal contact between the bucket and
the jacket
• Lid not tight
• Foam seal has deteriorated
• Bucket temperature outside the acceptable range
(3-5 °C below the jacket setpoint)
• Jacket requires water
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
There Is A Problem With The Bucket Thermistor.
Possible electrical open.
• Check connection to board
• Check quick disconnect between cables
• Replace probe
There Is A Problem With The Jacket Thermistor.
Possible electrical open or short. These errors will
result if the temperature probe response is not within
the expected range. Probe substitution can be useful
in determining the cause of the problem (probe or
electronics). The valid working range of the probe
resistance is 1000 to 5000 ohms.
• Room temperature is below 10 °C (50 °F)
A/D Initialization Failed.
Shortly after power is applied to the calorimeter
controller and the operating system has started, the
CPU attempts to read the unique I/O board calibration
information from the I/O board. If the I/O board is
not connected to the CPU, or the information on the
board is not valid, this error will be issued.
Bomb ID – Has Been Fired – Times Which Exceeds The Bomb
Service Interval.
The calorimeter controller keeps track of how many
times the bomb has been fired. When this count
exceeds a preset limit (usually 500) this message
will be issued each time the bomb is used for a test.
Perform bomb maintenance and reset the bomb fire
count on the Calibration Data and Control page for
the appropriate bomb number.
You Have Exceeded The Run Data File Limit (1000 Files).
The memory set aside for test runs has been filled.
Use the memory management techniques to clear out
non-current tests. See Chapter 8, File Management.
Bomb EE Standard Deviation Warning.
The relative standard deviation for the calibration
runs in memory for the indicated bomb exceeds the
preset limit.
Sample Weight Warning.
The entered sample mass exceeds the value entered
via the SAMPLE WEIGHT WARNING ABOVE key on
the Data Entry Controls page. This warning threshold
is normally 2 grams.