ENMET ISA-RAL-M - Manual (Page 6)

ENMET Corporation ISA-RAL-M, ISA-RAH-M
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3.0 Features, Definition of Parts 3.0 Features, Definition of Parts
3.1 Electronics Control Unit
Figure 1 shows the control unit which contains the electronics circuitry and controls. Main features are listed below.
Power Light
(Green) When this light is on, the unit is operating and is not in alarm. When this light is off,
the unit is in alarm OR power to the unit has been interrupted.
Alarm Light
(Amber) Visual alarm (steady light). When this light is on, power to the unit is on and the unit
is in low alarm.
Alarm Light
(Red) Visual alarm (steady light). When this light is on, power to the unit is on and the unit
is in high alarm.
Audio Alarm Audio alarm (2900 Hz,95 dB at 2 ft.). The audio alarm is on when the unit is in alarm.
Meter A carbon monoxide (CO) concentration meter. The scale is marked in parts per
million (ppm) CO. This is a non-linear device. Do not infer exact readings from
unmarked regions of the meter scale.
Operation Switch A rotary switch, for O PERATE (normal operation), H ORN O FF (disengage audio
alarm) or P URGE O N (sensor temperature control).
P URGE O N to clean (purge) sensor surface of adsorbed contaminants (sensor hot).
Switch Indicator Light
(Red) Indicates O PERATION S WITCH is not in O PERATE position.
Sensor Cable Oiltight cable. Connects the sample head assembly to the control unit
(length 8-10 feet). See Caution in section 4.0 Installation step 5.
Figure 1: Electronics Control Unit
Figure 2: High Pressure Regulator
Alarm Light
(Red)
Alarm Light
(Amber)
Power Light
(Green)
Switch Indicator Light
(Red)
Operation Switch
Meter
Audio Alarm
Sensor Cable
4 holes, .31 Dia.