Bearing Pressure Too Low; Encoder Index Not Found; Nf Gauge Fault; Nf Temp Sensor Fault - TA Instruments AR 2000 Operator's Manual

Bearing pressure too low

This is displayed if the air supply has been inadvertently switched off while the rheometer was on or if the
supply pressure has dropped below the minimum operating pressure.

Encoder index not found

This message can be displayed if the air bearing is not free to move. This can occur if the air-bearing clamp is
still attached or if the air bearing lock is on. Failing this, there may be a fault on the position encoder.

Nf gauge fault

This message is displayed if an excessive normal force was detected when attempting to zero the normal force
reading. This could be caused by either an excessive force being applied by air bearing/sample/mechanical
interference with ETC or a gauge fault.

Nf temp sensor fault

This message is displayed if there are either faulty normal force temp sensors or, if you have for instance, frozen
the instrument with excessive liquid nitrogen.

Operator stop event

This message is displayed when the Stop button was pressed while the Rheology Advantage software had the
keypad locked. This usually indicates that a test run was in progress and the operator aborted it using the
rheometer stop button.

Power cable fault

This indicates that the Power cable may not be plugged in firmly. See Chapter 5 for connection information.

Signal cable fault

This message indicates that the signal cable may not be plugged in firmly. See Chapter 5 for connection infor-
mation.

Temp sys element fault

This message is displayed because the Peltier or heater element has developed a fault.

Temp system environment

There is a configuration problem with the installed temperature control module. I.e., no water to the Peltier etc.
Re-read the manual to check you have set everything up correctly.
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AR 2000 Operator's Manual