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Quickstart Guide
GASMAX II Gas Monitor with Remote
SmartIR Combustible Gas Sensor
IMPORTANT
-
Before installing the GASMAX II,
make sure no toxic or combustible gases are
present. Declassify the area if necessary.
Air movement by fans, wind, gas density,
convection, emission sources and environmental
variables should be taken into account when
determining location. As with all sensors, the
GASMAX II should be protected from falling or
directed water, snow, shock, vibration and dirt.
Use installation practices approved for the
appropriate area classification. When installed with
#10-0247 Stainless Steel sensor head, the
GASMAX II is certified for use in areas rated Class
1, Div 1, Groups B, C & D.
Access the GASMAX II display assembly by
opening the explosion-proof cover and loosening
INSTALLATION
WIRING & INITIAL SETUP
CALIBRATION
After warm-up, follow the on-screen instructions to
calibrate the unit. When calibration is complete, the
GASMAX II will indicate CAL DELAY and then resume
normal operation.
GASMAX II Power Supply Board
the two thumbscrews. The power supply board is
attached to the rear of the enclosure.
Connect the GASMAX and remote sensor as shown
using shielded cable. Ground the shield on one end
only. Reinstall the GASMAX II display and cover.
Apply power and allow the instrument to warm up for a
minimum of one (1) hour. Readjust the sensor voltage to
4.5VDC
as measured at the sensor junction box
across
pins “R” and “A”.
Perform a balance adjustment as described in the
GASMAX manual.
TB1
TB2
S1
TP1
P
W
R
O
U
T
4
-2
0
“E
C
H
E
M
”
O
U
T
4
-2
0
“L
E
L
”
G
N
D
1
4
3
2
GASM AX I/O Po wer
Sup ply P/N 10-0 23 3
C
O
M
A
C
T
R
E
F
“CA TBEA D”
C1
C2
C8
C7
S1
TB2
TB1
SW1
R
C
A
R
C
A
Remote SmartIR Sensor Assembly
R
C
A
R
C
A
Important:
Do NOT exceed 5.5V across remote sensor
terminals R & A with the sensor in place.
If moisture is present, do not install remote
sensor with unused inlet facing up.
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