Table of Contents
4000 IMPS
THEORY OF OPERATION
Figure 1-3. IMPS Calibration Setup
1-4
5. The pressure switches detect if the pressure of a test gas is low, which
can be caused by an empty gas bottle, a disconnected gas line, etc.
Calibration is prohibited when test gas pressure is low.
6. The heater keeps the components in the ambient temperature range to
prevent electronic malfunction.
Reference Figure 1-3. When a calibration is initiated, via the IMPS,
HART/AMS, oxygen transmitter, or remote location, the signal is sent to the
IMPS 4000 PLC. The PLC first energizes the oxygen transmitter solenoid and
then energizes the test gas 1 (high gas) solenoid. Test gas 1 flows through the
IMPS 4000 to the oxygen transmitter. The oxygen transmitter measures the
oxygen content of test gas 1 and sends a signal to the IMPS 4000 indicating
that it received test gas 1. When the IMPS 4000 receives the signal, the PLC
deenergizes the test gas 1 solenoid.
Instruction Manual
IM-106-400 IMPS, Rev. 2.0
February 2009
Table of Contents
Troubleshooting
