ENMET ISA-RAL-M - Manual (Page 10)

ENMET Corporation ISA-RAL-M, ISA-RAH-M
6
5. Connect regulator/humidifier and hydrocarbon filter (if supplied) to the sensor head assembly. Attach this
assembly to a 50 – 250 psi compressed air line (see Figure 6).
C AUTION :
•
D O NOT use a rubber hose to connect regulator to air line. This may cause inaccurate meter readings
and false alarms.
•
D O NOT locate the sample point on a low spot in the line. Water condensation may clog or damage the
regulator or sensor assembly.
•
D O NOT modify or extend the sensor cable without first contacting ENMET customer service personnel
for instructions regarding heater voltage and adjustment.
The instrument can be installed directly on an ENMET AFP-82 or AFP-40 air filtration panel if the work location is
suitable. In the event that the work environment is unsuitable for the installation of the ISA-RAL-M, it should be
installed in a suitable location in the air line, upstream of the work environment.
6. Add tap water to the upper Water Level mark. Replace bowl, ensure water does not go higher then the upper edge
of the bowl.
7. Adjust the pressure regulator to between 7 and 12 psi.
8. Replace terminal strip cover on TB4 inside the control unit.
9. Proceed to Section 5.0 for initial warm-up and operating procedures.
Figure 6: Connecting to Compressed Air Line
Locate the Sample
Point after Purification
Regulator Panel.
Metallic Oxide
Semiconductor
Sensor
Hydrocarbon Filter
Humidifier
(Fill to Upper Water Level mark)
Pressure
Regulator
Quick Release
Fittings
Metering Orifice
Top Mount to Avoid
Water Trap
Locate near compressor
holding tank so sample air
reaches the sensor before
the same respiratory air
reaches the workers.
Plant Air
50 – 250 PSIG
Cut-Off Valve (optional)