Part Five – Technical Information
Product Specifications
Power: 120V AC units: 60 Hz, Current 60 mA max.
Sensor: Sensor calibrated at 150 ppm (±25 ppm).
Temperature:
Operating range: 40˚F (4.4˚C) to 100˚F (37.8˚C).
Mounting: Accessories supplied for wall mount, direct plug and table top applications.
Alarm: 85+ dB at 10’ @ 3.4 ± 0.5 KHz pulsing alarm.
LED Operation:
Blinking dot denotes normal operation.
Digital readout
In alarm condition you will hear 4 quick beeps, 5 seconds off, repeat.
Battery Backup:
A 9V battery is needed. If battery is low or
missing while the unit is plugged into a 120V outlet, an “Lb” message will display which will blink alternately with a the CO reading every second and the sounder will chirp every 15 seconds.
Unit Malfunction:
“Err” error message will display. Intermittent alarm will sound every 30 seconds.
Refer to pages
Test/Reset Button:
Test button verifies proper unit operation and resets the unit in the event of a CO alarm.
Peak Level Memory Button:
When pressed, LED will display the highest CO ppm level detected since unit was powered up or since unit was reset with test button. Reading will be stored in memory as long as unit is not reset or unplugged. Any CO concentration detected from
Size: 6”L x 3.75”W x 1.8”H. Wt. 1 lb.
Warranty:
How the Unit Determines When to Alarm
Your Nighthawk CO alarm uses advanced technology to monitor the environment in your home and warn you of unacceptable levels of carbon monoxide. An internal microcomputer works together with the carbon monoxide sensor inside the alarm to determine the levels of carbon monoxide in the air and to calcu- late the rate that CO would be absorbed into the human body. The microcomputer is calibrated to trigger the unit’s alarm before most people would experience any symptoms of carbon monox- ide poisoning. Because carbon monoxide is a cumulative poi- son,
This Nighthawk CO alarm meets the alarm response time requirements of UL Standard 2034 which are as follows:
At 70 ppm, the unit must alarm within
WARNING: This device may not alarm at low carbon monoxide lev-
els (see chart above for alarm points). WARNING: This product is intended for use in ordinary indoor locations of family living units. It is not designed to measure compliance with Occupational Safety and Health Administration (OSHA) commercial or industrial standards. This alarm has not been investigated by UL for carbon monoxide detection below 70 ppm. Individuals with medical problems may consider using warning devices which provide audible and visual signals for carbon monoxide concentrations under 30 ppm.
Accuracy of the Digital Display
Each Nighthawk CO Alarm is calibrated at a CO concentration of 150 ppm in air, at 80˚ F (+/- 10˚ F) and 40% (+/- 3%) relative humid- ity. Depending on the ambient condition (temperature, humidity) and the condition of the sensor, the alarm readings may vary.
The digital reading tolerances are:
Ambient: 80˚ F (+/- 10˚ F), atmospheric pressure +/- 10%, 40% +/- 3% relative humidity.
| Tolerance |
Reading | (of displayed reading) |