Multi-point Gas Alarm Systems
NV-500
Features
- Multi-point type (max. 12 points) gas alarm system for LPG or Methane.
- 2・4・6・8・10・12 points type are available (2 points per unit).
- Battery provides backup power in case of a power failure, allowing continuous monitoring over 30 minutes after the failure, then intermittently monitors for 2 days (option).
- Earthquake-resistant design considering great earthquakes.
- Battery life can be measured by one-touch operation.
- Very easy to change the alarm set value.
- Extremely easy zero adjustment and span adjustment.
- Wide operating voltage range of 85-264 V.
- Zero suppression function cancels slight fluctuations of the reading due to environmental change.
Specifications
| Model | NV-500 | |
| Detection Principle | Catalytic Combustion | |
| Gas Detected | LPG or Methane | |
| Detection Points per Unit | Monitors 2 points per unit | |
| Detection Range | 0-100%LEL (isobutane) | |
| Concentration Indicator Alarm Set Value Indication Backlight Peak Hold Function (on alarm) |
LCD bar-graph meter (53 dotsx2 lines) Direct reading scale Yes Holds a peak value on alarm, which is canceled by the Reset |
|
| Alarm Set Value(default value) /Change of the Set Value |
24%LEL | |
| Alarm Accuracy | ±25% of Alarm Set Value (under identical conditions) | |
| Response Time | 30s or less at 160% concentration of an Alarm Set Value
(excluding sampling delay for extractive type) |
|
| Alarm Indication |
Individual Alarm Lamp Latching |
On alarm: Flashes red, lights up after the Buzzer Stop Complete lock (Turn off by the Reset after the level declined) |
| Alarm Sound | Standard Operation | On alarm: Intermittent buzzer, stops after the Buzzer Stop |
| Voice Alarm | On alarm: Intermittent buzzer | |
| Eternal Alarm Output |
Individual Alarm Contact | Dry NO contact (Contact capacity: 2A@100 VAC) |
| Individual Voltage Output | 0-6-12 VDC (20mA or less) | |
| Collective Alarm Contact | Dry NO-C-NC contact (Contact capacity: 2A@100 VAC) | |
| Centralized Monitor Panel Output | 0-6-12 VDC (20mA or less) | |
| External Buzzer Contact | Dry NO contact (Contact capacity: 2A@100 VAC) | |
| External Buzzer Voltage Output | Intermittent voltage signal (12 VDC, 10mA or less) | |
| Alarm Delay | Selectable by a DIP switch (10s constant) | |
| Main Power Source | 85 to 264 VAC | |
| Power Consumption |
When using KD-14 | Diffusion type (15+3.5n)VA |
| When using PD-14 | Extractive type (15+7.5n)VA | |
| Backup Power Source* |
Battery Type | Sealed lead acid battery |
| Overdischarge Prevention Function | Yes | |
| Battery Life Check Function | Yes | |
| Battery Voltage Indication | 2-digit LED | |
| Exterior Color | Munsell 2.5PB 7.0/1.0 | |
*Only on models with a build-in backup power supply (option)
Connectable Detectors
Diffusion Type: KD-5A/KD-5B, KD-2A/KD, KD-14
Extractive type :PE-2DC,PD-14