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10. Specifications
Detection principle
NDIR
Sampling method
Diffusion type
Target gas
Carbon Dioxide
Detection range
*1
360 to 5000 ppm
Display
Four-digit LCD with backlight, 5 ppm resolution
Alarm set value
AL1: 2000 ppm, AL2: 5000 ppm
Detection accuracy
0 to 40°C: ± 5% of F.S.
Others: ± 10% of F.S.
Response time
*2
T90: 90 sec., T60: 60 sec., T50: 50 sec.
Alarm
▪
Gas alarm (in two stages)
1
st
stage alarm: AL1 alarm light flashes (lit if the audio alarm is
muted), amber status indicator sequentially-flashes, audio alarm
sounds, and AL1 icon is displayed on LCD.
2
nd
stage alarm: AL1 and AL2 alarm lights flash (lit if the audio alarm
is muted), red status indicator sequentially-flashes, audio alarm
sounds, and AL1 and AL2 icons are displayed on LCD.
▪
Alarm clearance method: selectable to self-resetting (default) or
manual-resetting at the time of order.
External output
▪
Gas concentration analog output
4-20 mADC (common negative with power supply)
- Normal operation: 5.15 to 21.6 mA (360 to 5500 ppm)
- Warm-up: 4 mA
- Fault status: 0.9 mA or below
Current sensing resistor must be 300Ω or less including a wiring
resistance.
▪
Gas alarm relay contacts (in two stages)
Dry normally open (default) or close contacts, latching type
Selectable to self-resetting (default) or manual-resetting at the time
of order
(Max load: 2 A at 30 VDC (resistance load))
▪
Fault alarm relay contact
Dry normally open (default) or normally close contacts, latching type
(Max load: 2 A at 30 VDC (resistance load))
Explosion-proof
Not explosion-proof
Compliance
CE (EMC & RoHS directives)
Other features
▪
Maintenance mode used to disable gas alarm relay contacts and
gas alarm audio.
▪
Audio alarm mute
Applicable cable
0.5 to 1.25mm
2
shielded cable. Outer diameter: less than 10.5mm
Cable length
Up to 500m
Operating temperature
and humidity
-10 to +50°C, 0 to 85%RH (No rapid temperature/humidity changes.
No condensation)
Power supply
24 VDC ± 10%
Power consumption
1 W during normal operation, 3 W during alarm
Dimensions
W82 x H150 x D35 mm
Weight
Approx. 300g
Mounting method
Wall mounting, indoor
*1: Do not use the product in an area where the CO
2
concentration is less than 360 ppm.
*2: Measured under identical environment at 20°C, 50%RH and 1,013hPa.
