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10. Specifications
10-1 Indicator and Alarm Unit
Model NV-100C
Principle of detection
Catalytic Combustion on a Platinum Filament
Gases to be detected
Combustible gases
Indicating range
0-100%LEL
Gas concentration indicator
LCD bar graph meter with back light
Standard preset alarm value
As specified. (The value can be adjusted within measuring range.)
Alarm accuracy
Within ±25% of the preset alarm value in the same condition
Response time
Within 30 seconds when gas concentration is 1.6 times more than the preset alarm
value (Except for delay due to length of sampling pipe.)
Alarm indication
First alarm: First Alarm lamp blinks red and a buzzer is heard.
Second alarm:First and second Alarm lamps blink red and a buzzer is heard.
Trouble indication
Power lamp rights up orange and the content of the failure is indicated.
Alarm output terminal (common)
First alarm contact
Second alarm contact
Trouble alarm contact
Buzzer contact
No voltage 1c contact (Contact capacity: AC100V 2A load resistance)
No voltage 1c contact (Contact capacity: AC100V 2A load resistance)
No voltage 1c contact (Contact capacity: AC100V 2A load resistance)
No voltage 1a contact (Contact capacity: AC100V 2A load resistance)
External reset terminal
Terminals for external alarm stop and reset
Analog output
4-20 mA (standard) 1-5 V (Option.)
Alarm delay
Delay mode can be set. (Delay time: About 10 seconds)
Zero suppression function
Zero suppression mode can be set. (F.S. ±5%)
Power source
AC100-240V 50/60Hz (standard)
DC24V (Option.)
Power consumption
Diffusion type: 12VA / 17VA (with a backup power source)
Suction type: 4VA per unit to be add.
Backup power source
(Equipment with a backup power
source only.)
Battery: Gastight lead battery (12V0.8Ah×2)
Backup time:
60 minutes or more
Function to prevent over discharge:Stops discharging at the battery’s final voltage.
Charge time:
About 12 hours
Maintenance function
Maintenance mode 1
Alarm contact and buzzer contact do not operate.
Alarm sound: Buzzer.
Maintenance mode 2
Alarm contact and buzzer contact do not operate.
Auto zero and auto span functions are canceled.
Linearization is cancelled while Enter button is being pressed.
Temperature range
0 to 40
℃
Installation Wall-hanged
or
panel-embedded
Painting color
Munsell 2.5PB7.0/1.0
Dimensions
Without a backup power source:W113
×
D71.5
×
H204 mm
About 1.5 kg
With a backup power source: W113
×
D110
×
H234 mm
About 3 kg
Remarks
Do not use any equipment that generates electric waves such as cellular phones
or radios within 30 cm of the indicator and alarm unit.
