Parr-instrument 6725 Bedienungsanleitung PDF herunterladen (Seite 61)

6725 Semi-micro Calorimeter Instruction Manual

10-1

TROUBLESHOOTING

Error List

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.

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.

• Fuse wire not intact or improperly formed

• Breakdown of the insulator and o-ring on the insulated electrode assembly

• Bomb not filled with oxygen

• A bomb leak.

• Poor bucket stirring

• Ignition lead wires have broken internal strands

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

• Lid not tight

• Initial bucket temperature outside the acceptable range (1-2 deg C below the

jacket setpoint)

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:

• A bomb leak.

• Poor bucket stirring.

There Is A Problem With The Bucket Thermistor.

Possible electrical open or short. This

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.

• Check connection to board.

• Check quick disconnect.

• Replace probe.

There Is A Problem With The Jacket Thermistor. Possible electrical open or short. This

errors will result if the temperature probe response is not within the expected range.

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Parr-instrument 6725 Bedienungsanleitung Seite 61