版本号：
301900AB180704
1
Instruction Manual of JTQ-BM-925TE Combustible gas detector
------ Please read this Manual carefully before installing and using the product. -----
1. Product overview
JTQ-BM-925TE, Point type Combustible gas detector,
（
hereinafter referred to as the detector
）
,which
measurement range is 0~100% LEL, is with a new type thick film metal oxide semiconductor, screen printed
gas sensor, provides accurate and continuous monitoring of combustible gases in household , industrial,
hotels,apartments, etc. It can also access the Sanjiang fire alarm control system.
2.Product Features
With the semiconductor gas sensor and excellent performance of MCU, The detector is stable, long-life
and easy to install.
3.Technical Parameters
3.1 Operating Volt
：
DC24V
，
limited voltage range
：
12
～
28V
3.2 Operating Current
：
Monitoring status,
≤
35mA @DC24V
；
Alarm status,
≤
40mA @DC24V.
3. 3 Two Bus system
：
Non polarity two-wire system, current
＜
400µA
3.4 Operating environment: Temperature: 0
℃～
55
℃
; relative humidity:
≤
95%, without condensation.
3.5 Alarm Level: Natural gas 10%LEL
（
±30
％）
3.6 Response timing
：
≤
30 Seconds, reset automatically
3.7 Working life
：＞
5 years
（
clear air condition
）
3.8 Power on
（
or reset
）
：
The indicator blinks twice quickly when power on or reset, then it blinks in the
sequence of green, red, and yellow, along with the warning sound of buzzer.
3.9 The indicator: Warming up status, green indicator blink quickly ( about twice per second);
Monitoring status, green indicator blinks once per around 12 seconds (once per minute when there’s no input
signal of two bus system); Alarm status, red indicator blink quickly (twice per second); Fault status of sensor,
yellow indicator blink once per 3 seconds.
3.10 Buzzer: Alarm status, it sounds twice per second; Fault status,it sounds once per 3 seconds.
3.11 Self-inspection button: Press the button, the indicator blinks in the sequence of green, red, yellow in
circles along with the the warning sound of buzzer.
3.12 Dimensions: Ø104mm x 48 mm. Material of enclosure: ABS ( anti-flaming VO)
3.13 Installation: DZ-925T Base mounted. Surface mount or ceiling mount
3.14 Comply with standards: GB 15322.1-2003
4. Configuration and connection
4.1 Appearance of the detector
2
4.2 Back side of detector
4.3 Connector of base
Note: A. Points of 1 and 3: input of bus wire ( non polarity)
B. Points of 2 and 4: input of DC24V ( non polarity)
5. Installation / Usage instruction
5.1 Wire with the power wire, bus wire, and the base of DZ-925T firstly, after all the decoration work in the
application site is done, ( Note! Don’t make your detectors appealing during the decoration process,
otherwise the sensor will be damaged.), then connect the base with the detector.
Power on the detector, the indicator blinks twice quickly, then it blinks in the sequence of green, red, and
yellow along with the warning sound of buzzer.
Preheating, green indicator blinks quickly; After preheating, green indicator blinks slowly for around 20
seconds, then it comes to monitoring state, green indicator blinks once per around 12 seconds (once per
minute when there’s no connection of two bus system).
5.2 Location of mounted
Decision of location (as shown below) should follow the below instructions, and make a detail analysis
according to the reality of fuel gas and cookware, to decide the location.
5.2.1 Detector should be installed in the same room with stoves or gas fires.
5.2.2 The base of detector shall be between the stove and the source of gas, horizontal distance between 1.5
and 4 meters.
5.2.3 Decide the vertical height according the type of gas
--For LPG. Detection of petroleum gas should be installed 0.3m from the ground( because of the
gas is heavier than the air)
--Gas detection : should be installed above the stove or any other gas source at vertical distance
Mounted
plates
Label
L1
GND
24V
L2
