Ir Emitter; Pressure; Loop Test; Clear Last Fault - Bacharach H25-IR Operation & Maintenance Manual

Parts &Service

5.1.3 IR Emitter

The IR Emitter screen provides readouts of the detector's voltage, current, resistance, and power consumption.
When contacting the Bacharach Service Department, the operator may be asked to provide this information to
help in the troubleshooting process.
To display the IR Emitter screen, first display the Diagnostics menu as described in Section 5.1. Next, use the
Up and Down buttons to highlight "IR EMITTER" and then press ENT.
IR EMITTER PARAMETERS
VOLTS=6.1740 mA=129.5
OHMS=47.7 mW=800.0

5.1.4 Pressure

The Pressure screen provides readouts of bench pressure, ambient pressure, the difference between the two
(delta), flow rate through the bench in moles per minute, and the tank pressure of the internal leak source.
When contacting the Bacharach Service Department, the operator may be asked to provide this information to
help in the troubleshooting process.
To display the Pressure screen, first display the Diagnostics menu as described in Section 5.1. Next, use the
Up and Down buttons to highlight "PRESSURE" and then press ENT.
BENCH  AMB
DELT
2.31
11.73 14.04
FLOW=0.00950Mpm
LEAK PSI=102.1(100.2)
This screen also allows a technician to manually turn the pump ON and OFF, along with manually controlling
the position of the measure/search flow-rate valve.
Pressing the Down button toggles the pump ON and OFF.
Pressing the Left button opens and closes the measure/search flow-rate valve. An asterisk () on the display
indicates that the valve is in its measure position.

5.1.5 Loop Test

The Loop Test screen allows the operator to force the instrument's 4–20 mA loop output to 0, 4, 10, or 20 mA.
This function is useful for checking the calibration of external monitoring equipment such as chart recorders.
To display the Loop Test screen, first display the Diagnostics menu as described in Section 5.1. Next, use the
Up and Down buttons to highlight "LOOP TEST" and then press ENT.
LOOP TEST
DOWN=0ma UP=20ma
LEFT=4ma RIGHT=10ma
ESC TO QUIT
Press the Up, Down, Left, and Right buttons to produce the desired output current. Press ESC to return to the
Diagnostics menu.

5.1.6 Clear Last Fault

The Last Fault screen normally displays the last fault detected by the instrument, even if the fault no longer
exists. This is useful in determining the cause of an intermittent type fault.
To clear the Last Fault screen of all faults: first display the Diagnostics menu as described in Section 5.1; use
the Up and Down buttons to highlight "CLR LAST FAULT"; press ENT; and then confirm this action by pressing
the Up button.
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H25-IR
Instruction 3015-5286