Installation, Operation & Maintenance Manual Merlin Gas Detector-X
DETX-IOM Iss: 7 02-21
18
General Specification
General
Product:
Gas Detector-X
Model(s):
CO (Carbon Monoxide) NG (Methane/Natural Gas) LPG (Liquid Petroleum Gas) H (Hydrogen) O2 (Oxygen)
Use:
Indoor, Non-Hazardous Areas (not to be used in potentially explosive atmospheres)
For protection against flammable and toxic gas hazards.
Indicators (1.8” TFT Screen)
Green (Safe), Yellow (Special State) & Red (Alarm). Gas Type & Detected Concentration Level. Measured
Value Detector ID No. Serial No. End of Life. Sensor Fault. Service.
Screen Brightness
Non- adjustable
Orientation
Wall Mounted @ 360°
Electrical
Max. Power Consumption
90mA Max @ 24Vdc
Power Voltage Input Range
12-32Vdc (24Vdc Nominal)
Communication
RS485, Modbus RTU
BMS Terminal
Volt Free (Normally Closed / Common / Normally Open)
GDP Terminal
24Vdc Power Input (+ - ) & Current Loop (CL)
Relay(s)
1x 1A @ 125Vac/ 2A @ 30Vdc
(Non-Latching) Configurable Normally open or Normally Closed (Switch)
Terminal Wire ratings
Copper 18AWG (0.75mm2) Min.
14 x screw terminals.
End of Life/ Service Battery
CR2032 - 3V 220mA Radial Lithium
Annual service reminder message activated upon five (5) hours of continuous power.
EOL message activated upon five (5) hours of continuous power and shown at end of expected sensor life.
Construction
Dimensions (H x W x D)
140 x 95 x 30mm / 5.51 x 3.74 x 1.18”
Unit Weight (Approx.)
0.05kg / 1.77oz
Nominal Orientation
Wall Mounted (No Limits)
Housing Material
Polylac - PA765
Environmental
Ingress Protection
IP40
Storage Conditions
Dry. Temp: -20 ~ 50°C / -4 ~ 122°F RH: 15 ~ 90%
Sensor Operating Temperature
-20C° ~ 50°C (-4 ~ 122°F)
Sensor Operating Humidity
Continuous 30-80% RH Non-Condensing
Sensor Operating Pressure
Normal Atmospheric Pressure ± 10%
Compliance
CE
BS EN 50270 / BS EN 61010-1
UKCA
BS EN 50270 / BS EN 61010-1
Performance Considerations
BS EN 45544-1 / BS EN 60079-29-1 / BS EN 50104
Sensor Specification
Factory Calibration Conditions
25° ± 5°C - 77° ± 41°F (40-70% RH)
Gas
Sensor
Indicating
Range
Steps
Calibration
Gas
Response
(T90)
Recovery
(T10)
Accuracy
Alarm: 1
(Pre alarm
warning)
Alarm: 2
*EOL
(Years)
Electrochemical Sensors
Carbon
Monoxide
(CO)
0-
999ppm
1
120ppm
CO
<60s
<60s
±20%
▲
20ppm
Exposure time.
▲
20ppm (after two hours)
▲
50ppm (after one hour)
▲
100ppm (after ten minutes)
▲
300ppm (after one minute)
5
Oxygen
(O
2
)
0-30%
V/V
0.1
20.9%
O2
<30s
<60s
±20%
N/A
▼
18.5% V/V
▲
23% V/V
3
Semiconductor Sensors
Methane
(CH
4
)
0-20%
LEL
0.1
0.5%
methane
<30s
<30s
±20%
▲
8% LEL
▲
10% LEL
10
Propane
(LPG)
0-20%
LEL
0.1
0.2%
Propane
<30s
<30s
±20%
▲
8% LEL
▲
10% LEL
10
Hydrogen
(H)
0-20%
LEL
0.1
4000ppm
Hydrogen
<30s
<30s
±20%
▲
8% LEL
▲
10% LEL
10
▲ Rising Alarm ▼Falling alarm
*EOL – Expected operational Life – Replace unit after this time.
MODBUS is a registered trademark of Schneider Automation Inc.
