Hanwei Electronics Co., Ltd www.hwsensor.com
[email protected] Fax: 86-371-67169090 Tel: 86-37167169070/80
5
Circuit fault
Contact the distributor
The alarm give alarm
after the warm up
Too much smoke, alcohol or
perfume or other volatility gas in
the air.
Move the clean air
and test again
Stored too long
Warm up for more than
2 hours
Circuit fault
Contact the distributor
or factory maintain
7. Notices:
7.1
It’s possible that the detectors give alarming in the conditions of long time smoking,
drinking, or using perfume, gasoline, paint and other volatile organic compound
；
7.2 Please do not use or store the detectors in the corrosive gases(such as Cl
2
);
7.3 please do not use some non calibrated gas to test the detectors, If the gas
concentration is too high, it will damage the detectors, also is harmful for human’s health;
7.4 Clean the dust or dirt on the alarm frequently to keep air vent freely and the lights clear
7.5 The detector needs to be keeping power on for more than 24 hours after a long time
delivery of storage.
8 Gas Safety Knowledge:
8.1
Sorts of gases
Normal domestic gas
：
LPG: propane and butane
；
Coal Gas
：
hydrogen and carbon monoxide
；
Natural Gas
：
methane
；
All of the normal domestic gases is combustible gas, whose LEL (lowest explode limited) is
below 10% of mixture with air.
When the concentration of the leaking gas in air, it will narcotize people’s centre nerve,
even cause suffocation.
8.2
When the gas burning, it need abundant air, such as 1m
3
need about 30m
3
.So the
placed with hearth such as kitchen has to be keep ventilate.
8.3
LEL Meaning:
LEL is Lowest Explode Level. That is the lowest concentration of the gas in the air,
which will cause exploding when meeting fire.
8.4
Reasons of gas leakage:
Wrong ignition.
The fire is put out with winds during the cooking.
Gas
Basis
Exploding Range
Toxicity
LPG
C
4
H
10
、
C
3
H
8
1.8%
～
9.5%
suffocation
Natural Gas
CH
4
5%
～
15%
suffocation
Coal Gas
H
2
、
CO
4%
～
75%
toxicosis