ENMET ISA-44-RAL-OD - Manual (Page 11)

ISA-44RAL-OD / ISA-44RAH-OD ENMET Corporation
7
3.2.1 CO Circuit
Refer to Figure 2
P URGE A DJUST
P OTENTIOMETER
Adjusts purge voltage. Operation switch must be in purge position to adjust
purge voltage.
H EATER A DJUST
P OTENTIOMETER
For adjusting the MOS sensor heater operating voltage. DO NOT adjust this
potentiometer unless a voltage reading indicates that an adjustment is necessary.
(May need adjusting after replacing sensor cable assembly). Voltage: .86 Vdc
+ .03 Vdc
M ETER A DJUST
P OTENTIOMETER
To adjust and set the meter for appropriate gas response during calibration.
L OW L EVEL A LARM S ET
A DJUST P OTENTIOMETER
For adjusting the trip level of the CO low level alarm light.
H IGH L EVEL A LARM S ET
A DJUST P OTENTIOMETER
For adjusting the trip level of the CO high level alarm light and the audio alarm.
3.2.2 Oxygen Circuit
Refer to Figure 2.
O XYGEN A LARM S ET For adjusting the trip level of the audio alarm and the amber oxygen alarm light.
N ULL A DJUST For adjusting oxygen circuit voltage during calibration.
M ETER F ULL S CALE A DJUST For adjusting full scale meter reading during calibration.
L OW L EVEL S ET For adjusting oxygen circuit voltage during calibration.
Figure 3: Relay Hook-up, Internal Power Figure 3a: Relay Hook-up, External Power
Figure 3: Relay Hook-up, Power Internal and External
Auxiliary Horn
(example)
Install a Separate
switch to silence
an Auxiliary Alarm
110 VAC
Hot Neutral
Auxiliary Horn
(example)
Install a Separate
switch to silence
an Auxiliary Alarm
110 VAC
Outside Source
Neutral Hot