Bosean Electronic Technology BH-90 User manual
BH-90
Portable Single gas Detector
User Manual
Ver：BSA20150424003
Bosean Electronic Technology Co.,Ltd
ISO9001-2008
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To avoid personal safety injury, Instrument damage and potential dangerous accident;
do not use the product before reading this manual.
1. Description
BH-90 portable single gas detector can make continuous
detection to combustible and toxic gases. It is suitable
for combustible and toxic gas leakage detection in
underground pipe or mines, and keeps the workers safe,
prevents the facilities from being destroyed.
The detector, adopting excellent-quality sensor, makes
detection in the way of natural diffusion. It has good
sensitivity and reproducibility. The detector adopts
embedded MCU controller, easy to operate.
The shell adopts special high strength material and
anti-smooth rubber, with the characters of water-proof
and dust-proof.
2. Features and specifications
2.1 Features
Advanced MCU control with low power consumption;
Adjustable low and high alarm level;
Adjustable calibrating level;
High concentration protection for combustible gas;
Self test for the combustible gas sensor;
Low battery indication;
Self-adjustment function
Visual and audible alarm with vibration;
Advanced self-examination and self-renovation function
Password management to avoid wrong operation;
Explosive proof housing
2.2 Specifications
Range: See attached table 1.
Gas Detected: combustible gas (CH4,C3H8,H2) and toxic gas, oxygen, Other rare
toxic gas like ammonia, NO, PH3, NH3, NO2, HCN, SO2etc also available,Can be
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specified by the Customer in advance.
Alarm set points: see attached table 1.
Accuracy: ≤±5% F.S. Response time: T<30s
Indication: LCD indicates the time and state
Indication of alarm, fault and low voltage with LED, sound, vibration
Operating Environment:
Operating temperature -40℃～70℃(for combustible gas)
Operating temperature: -20℃～50℃(for toxic gas)
Humidity: <95%RH non-condensing
Operating voltage: DC3.7V Li battery 2000mAh
Working time: ≮8h continuously
Charging time: 4h～6h
Sensor life: 2 years
Protection category: IP65
Weight: about 130g (including battery but without accessories)
Dimension: 100mm×58mm×30mm
3. Structure & Function
3.1 Appearance
1
Alarm light
5
Buzzer
2
Buttons
6
USB charging connection
3
LCD screen
7
Sensor
4
Back clip
8
Back clip
3.2 Detector structure: the main shell, circuit boards, batteries, display, sensors,
chargers of the components.
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3.3 Principle: Electrochemical or Catalytic sensor.
4. Operation & Function
4.1 Display Elements
CH4
Gas type
13:01
Time
Full voltage
0%LEL
Concentration value
4.2 Push buttons
Push button
Description
To active the detector, press and hold it for 5 seconds
Press it to cancel the the operation;
To deactive the detector, press and hold it for 5 seconds
Press and for more than 1s to set up the parameters
Can check parameters, alarm record, low alarm, high alarm, zero
calibration, calibration,time set.
To set the parameters, press it
To turn off the alarm sound and vibration in the alarm state, press
it
Press the button in the lower left, press it and turn on the light
4.3 Turn on
Press the button for 5s and then release it. The interface shows “Starting”, “LED
Testing”, and then vibrates with “Motor Testing”, then beep and flashes with “Sound and
Alarm Testing”,it enters into detecting status.
At this time, it displays the concentration of gas in the environment as figure 1.
CH4 13:01
0% LEL
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Fig 1
4.4 Turn off
To deactivate the detector, press “ ”key, then it displays the following information:
At this time, the buzzer gives beep sound. After 3 seconds, when it displays the
following figure on the screen, loosen the “ ”key. The detector is turned off.
Attentions ：When the detector is not detecting status, press continuously till it
returns to the detection mode.
4.5 Menu Operating Instructions
The user menu contains the following options:
Alarm record, low alarm settings, high alarm settings, zero calibration, calibration, time
set.
In the detection state, press and keys at the same time, the screen displays the
following screen, directly into user menu as shown in figure 4:
Fig. 4
CH4 13:01
0% LEL
-=MENU=-
→ Record
Low Alarm Set
High Alarm Set
Gas Zero
Gas Calib
Set time
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Parameter setting of the detector
Display
Description
Fig5
Fig6
Fig7
1. Alarm record:
Move the cursor to Alarm record, press to
enter it as figure 5: Press the and keys to
scroll. You can also press to return to the menu
settings page. Press the button in the alarm
record interface, shown in Figure 6: Press the key
to indicate Yes, the page will show Figure 7: Please
clear the record later. Press the key again to
enter the normal detection interface. If press , the
record will not be cleared and the interface will go
directly to the menu setting screen.
Fig8
Fig9
Fig10
2. Low alarm settings
Press the button in the menu interface, the
interface shown in Figure 8: press key to enter low
alarm set interface show as Figure 9: press the
button to increase the value, press to
decrease the value, press the key to cancel the
operation, the instrument directly into the menu page,
press the button means save currently selected
value, interface as shown in Figure 10: the instrument
directly into the menu screen, press the button
again, the instrument enters the normal detection
interface.
If there is no special requirement, the alarm
parameters should not be modified
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Fig11
Fig12
Fig13
2. High alarm settings
Press the button in the menu interface, the
interface shown in Figure 11: press key to enter
high alarm set interface show as Figure 12: press
the button to increase the value, press to
decrease the value, press the key to cancel the
operation, the instrument directly into the menu page,
press the button means save currently selected
value, interface as shown in Figure 13: the instrument
directly into the menu screen, press the button
again, the instrument enters the normal detection
interface.
If there is no special requirement, the alarm
parameters should not be modified
Fig14
Fig15
Fig16
Fig17
4 zero function setting
Press the button in the menu interface, the
interface shown as Figure 14: press key to enter
into the zero setting page as Figure 15: press the
button for zero drift, as shown in Figure 16: press
the button to cancel the drift operation, the
instrument directly into the menu settings page, press
the button to save the drift value, interface as
shown in Figure 17: the instrument directly into the
menu screen, press the button again, the
instrument enters the normal detection interface.
Warning: this operation is to ensure that the operation
is carried out in clean air, otherwise the concentration
of the reaction gas in the environment will affect the
accuracy of the portable gas detector.
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Fig18
5 Calibration settings function
In order to avoid the user into this function affect
the detector work. This function is set separately.
Please contact the manufacturer or distributor for this
operation.
Fig19
Fig20
Fig21
Fig22
Fig23
6.Time setting
Press the button in the menu interface, the
interface shown as Figure 19: press key to enter
into the time setting page as Figure 20:press the
button to increase the value, press to
decrease the value, press the key to cancel the
operation, the instrument directly into the menu page,
press the button to save the year value, the
instrument directly into the month setting screen as
Fig.21, press and buttons to select the
appropriate month, press the button to save the
month value, the instrument directly into the date
setting screen as Fig.22, press and buttons to
select the appropriate date, press the button to
save the date value, the instrument directly into the
hour setting screen as Fig.23, press and
buttons to select the appropriate hour, press the
button to save the hour value, the instrument
directly into the minute setting screen as Fig.24,
press and buttons to select the appropriate
hour, press the key to save the data portable gas
detector display Is saved later, and then enter the
menu settings interface, then press the button
portable gas detector into the normal detection
interface.
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Fig24
4.6 Alarm information
The following table shows the details of each alarm:
Alarm type
Low alarm:
Short slow alarm tone;
The alarm indication is yellow;
The red alarm light flashes;
Device vibrates .
High alarm:
Abnormal harsh alarm tone;
The alarm indication is red;
The red alarm light flashes;
Device vibrates.
Low battery alarm:
When the device is in low battery, it will give slow short
alarm every minute to remind user.
4.7. Charging
Please charge the detector when it shows low battery or the detector can’t be turned on
due to low battery. Before charging, please turn off the detector to avoid any potential
damage. When the battery mark on the screen is full and doesn’t change any more, it
means the charging is completed, you can pull off the charger.
Warning: During charging status, the detector can’t detect the gas leakage. Please do
not try to charge it at testing places to avoid fire or explosion. Please do not charge it
when the detector is working to avoid potential damage.
Note: Make sure full charge for at least once within 1 months
If do not use it for a long time.
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5. Possible fault and corresponding solution
Possible fault
Possible reason
Corresponding solution
No response to alarm
Wrong alarm point
Please reset the alarm point
Fault of electric circuit
Please contact the manufacturer
No response to gas
detected
Zero drift
Calibrate zero point
Fault of electric circuit
Please contact the manufacturer
Inaccurate indication
Sensor is overdue
Please contact manufacturer to
replace gas senor
Uncalibrated for long time
Please calibrate it in time
Insufficient working
hours
Fault of Charger
Please change charger
Fault of the Device
Please contact the manufacturer
Can not charge
electricity
Fault of Charger
Please change charger
Fault of the Device
Please contact the manufacturer
6. Notices
6.1 Falling down from high places or strong shake is prohibited.
6.2 The detector may not work properly at interferential high-concentration gas.
6.3 To avoid incorrect result or possible damage to the detector, please operate and
handle the detector in accordance with the manual.
6.4 The detector should be not stored or used neither under the circumstance with
caustic gas (such as Cl2), nor under the other rugged circumstances, including
excessive high or low temperature, high humidity, electromagnetic field and strong
sunshine.
6.5 If there is dust on the surface of the detector after a long-term use, please clean it
lightly with clean soft cloth. The surface may be scraped or destroyed with caustic
solvent or hard things.
6.6 To assure the testing accuracy, the detector should be calibrated periodically. And
the calibration period should be less than one year.
6.7 Please put the used Lithium batteries to the appointed places or send to our
company. Don’t discard them into the dustbin randomly.
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7. Standard accessories:
Gas detector 1pc
Calibration cap 1pc
Charger 1pc
User manual 1pc
Suit case packaging 1pc
Affix. Table1
Model
Range
L-alarm
H-alarm
□BH-90
-CH4
0-100%LEL
20%LEL
50%LEL
□BH-90
-C3H8
0-100%LEL
20%LEL
50%LEL
□BH-90
-H2
0-100%LEL
20%LEL
50%LEL
□BH-90
-H2
0-1000ppm
35ppm
250 ppm
□BH-90
-H2S
0-100ppm
10ppm
15ppm
□BH-90
-CO
0-1000ppm
35ppm
200ppm
□BH-90
-CO
0-2000ppm
35ppm
200ppm
□BH-90
-O2
0-30%vol
19.5%vol
23.5%vo
l
□BH-90
-C2H5OH
0-100%LEL
20%LEL
50%LEL
□BH-90
-NH3
0-100ppm
25ppm
50ppm
□BH-90
-CL2
0-20ppm
5ppm
10ppm
□BH-90
-SO2
0-100ppm
2ppm
5ppm
□BH-90
-PH3
0-20ppm
0.3ppm
5ppm
□BH-90
-PH3
0-20ppm
3ppm
15ppm
BH-90
-HCN
0-50ppm
10ppm
20ppm
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Declaration
To keep continued product improvement, Bosean reserves the right to change design
features without prior notice
Henan Bosean Electronic Technology Co.,Ltd.
No.228,West 4th Ring,National High-Tech zone,Zhengzhou,China
Tel: +86 371 86533226
Fax: +86 371 86533226
Website: www.bosean.com
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