Parr Instrument 6400 - Manual (Page 74)

6400
Calorimeter Instruction Manual
10-5
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.
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.
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. This will also occur if the lid is not down
before the pretest or test is initiated.
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. Please refer to the Jacket Temperature Troubleshooting
section of the manual.
Could Not Cool the Bomb Successfully
The calorimeter has failed to establish the desired cool down temperature within the time
allowed. Check the flow of cooling water to see that it is not restricted or the filter
plugged. It may also be that the water is not cold enough.
Rinse Tank Level May Be Low
The controller decrements the rinse tank counter each time the bomb is rinsed. This
message will be issued when the counter is at or below zero when the bomb rinse
sequence is executed. This message is a reminder that the rinse tank needs refilling,
followed by a manual resetting of the bomb rinse counter.