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11. Specifications
11-1 Standard specification
Model
：
RI-2000W
Detecting principal
：
Non-dispersive infrared absorption (NDIR)
Target gas
：
Nitrous Oxide(N
2
0)
Detection range
：
0 to 200 ppm
Alarm accuracy
：
Within 30% of the alarm set point (on a like-for-like basis)
Alarm delay time
：
Within 30 seconds
Sampling method
：
Automatic aspiration by a pump
Aspiration rate
：
approximately 1.0 litre/ min
Gas inlet connector
：
φ
6(0D)-
φ
4(1D) size Teflon tube with a propylene male
connector
Indications
：
16 digits (numbers and alphabets)
Concentration
：
LCD 16 digits
Status
：
LCD 16 digits and LED lamps
1.
POWER
lamp
(Green)
・
Normal condition
：
Keeps on
・
Trouble condition
：
Flashes
2.WARNING
lamp
(Yellow)
・
Normal condition
：
Off
・
1st gas alarm
：
Flashes
（
Keeps on if BZ.STOP is pressed
）
3.ALARM lamp
(Red)
・
Normal condition
：
Off
・
2nd gas alarm
：
Flashes
（
Keeps on if BZ.STOP is pressed
）
4.MAINTENANCE lamp
(Green)
・
Detecting mode
：
Off
・
Maintenance mode
：
Flashes
transmission scheme
：
4-20mA (non-insulated, discharge energy)
load resistance
：
below 300
Ω
Output signal
：
4-20 mA
Warm up
：
2.5 mA
Maintenance
：
2.5 mA
Trouble (fault)
：
0.5 mA
Recommended cables
：
CVVS
relevant cables 1.25 to 2.0 sq
