Cng Gas Detection System

Item / Model

NV-400

Detection Principle

Hot Air Semiconducter

Gas Detected

NV-400 : Town gas (Natural gas)

Detection Points per Unit

Monitors 2 points per unit

Detection Range

NV-400 : 0-100%LEL

Concentration Indicator
Alarm Set Value Indication
Backlight
Peak Hold Function (on alarm)

LCD bar-graph meter (53 dots x 2 lines)
Direct reading scale
Yes
Holds a peak value on alarm, which is canceled by the reset

Alarm Set Value (default value)

NV-400: 10%LEL fir Ist stage, 24%LEL for 2nd stage

Alarm Accuracy

±25% of an Alarm Set Value (under identical conditions)

Response Time

NV-400: 30s or less at 160% concentration of an Alarm Set Value (excluding sampling delay for suction type)

Alarm Indication

Individual Alarm Lamp
Self-holding type

On Alarm : Flashes red, lights up after the Buzzer Stop Complete lock (Turn off by the reset after the level declined)

Alarm Sound

On Alarm : Intermittent buzzer, stops after the Buzzer Stop

External Alarm Output

Individual Alarm Contact

1 a no-voltage (Contact capacity : 2A@100V AC)

Individual Voltage output

0-6-12V DC (20,A or Less)

Collective Alarm Contact

1 c no-voltage (Contact capacity : 2A@100V AC)

Centralized Monitor Panel Output

0-6-12V DC (20,A or Less)

External Buzzer Contact

1 a no-voltage (Contact capacity : 2A@100V AC)

External Buzzer Voltage
Output

Intermittent voltage signal (12V DC, 10mA or less)

Alarm Delay

Selectable by a DIP awitch (10s constant)

Main power Source

85-264V AC

Power Consumption

When Using KD-5

Diffusion type (15+3.5n)VA

When Using PE-2DC

Suction type (15+7.5n)VA

Backup Power Source (Only on models with a built-in backup power supply)

Battery Type

Sealed Lead Acid Battery

Overdischarge Prevention Function

Yes

Battery Life Check Function

Yes

Battery Viltage indication

2-digit LED

exterior Color

Munsell 2.5PB 7.0/1.0