Besantek BST-MG08, BST-MG09 Manual Instruction

BST-MG08/09 Multi-gas Detecting Alarm

Manual Instruction

1. Application: This product is designed to ensure sa fety for users who work in dangerous

places. It’s used for detecting CO, O2, H2S, CH4 simultaneously and alarm users by light,

sound and vibration. This device is portable, anti-explosion and intrinsically safe.

2.

Features:

1. Measured gases: Combustible Gas(LEL/CH4), Oxygen(O2), Carbon Monoxide(CO), and

Hydrogen Sulfide(H2S). Contact manufacturer f

or other gas combinations.

2. It will alarm users by sound, vibration, and light with different intensity if actual

concentration is higher or lower than preset alarm points.

3.

Operation:

1. 4 buttons included.

On/Off button; OK button; ▲Up button; ▼Down button

2. Long press

On/Off button to activate the device. It will show below information in
turn:

A. Product brand

B. Low Alarm [L]

C. High Alarm [H]

D. STEL Alarm [S]

E. TWA Alarm [T]

F. Preset Calibration Value

G. Product number and next calibrate date, 30 seconds countdown

H. Auto Zero option

3. In auto zero option, after seeing “Adjust Zero?”, long press “OK” button to zero all

sensors, short press “

” button to exit. When the device is zeroed in unfresh air, the
system will zero itself when the device is back to fresh air, n o need to worry about the

accuracy.

4. In main interface, it shows 4 alarm icons on top area: [L], [H], [S], [T], if there is any alarm,

the corresponding icon will turn red. Short press “▲” to switch among STEL, TWA, PEAK,

and MIN. No operation for 30 seconds will bring it back to main interface.

5. Long press “OK” button to enter function interface.

LOGO

Main Interface

Function interface

6. In f unction interface, short press “▲ ” or “▼” to select function, then short press “OK”

button to enter corresponding function.

7. In zero interface, short press “ ▲ ” or “ ▼ ” to select gas, long press “OK” button, the

background of selected gas will turn red, long press “OK” button again to c o mplete the

operation with display “set OK”. If there is no “set OK” showed, it means operation is

failed. Short press “

” to exit.
Notice: Use 100%vol nitrogen gas to zero oxygen sensor, for other sensors, it can be done in

fresh air.

8. In alarm interface, short press “▲” or “ ▼” to select among “Set Low Alarm”, “Set High

Alarm”, “Set STEL Alarm”, and “Set TWA Alarm”. Short press “OK” bu tton to enter each
setting “Alarm[L]”, “Alarm[H]”, “STEL[S]”, “TWA[T]”, short press “▲ ” or “▼ ” to set the

value, long press “OK” button to complete the operation with displ ay “set OK”. Short

press “

” to exit.

9. In time setting interface, short press “OK” button to select “Year”, “Month”, “Day”,

“Hour”, “Min”, then press “▲ ” or “▼ ” to adjust the value. Long press “OK” button to

complete this operation with display of “Set OK”. Short press “

” to exit.

10. In calibration setting interface, short press “▲” or “▼” to select between“Set Value”

and “Common Calibration”

A. “Set Value”: user should input available calibration gas concentration here, short

press “OK” button to select among gases and short press “▲ ” or “▼ ” to adjust gas

values, long press “OK” button to complete this setting with display of “Set OK”.

Zero Interface

Alarm Set

Low Alarm setting

Time Setting

Calibration Setting

Common Calibration

Important: user should make this setting before following operations.
B. In “Co mmon Calibration” interface, short press “▲” or “▼” to select gas, long press

“OK” button, the background of selected gas will turn red, connect calibration gas

and after the value is stable, long press “OK” button to complete this operation with

display of “Set OK”. Short press “

” to exit.

Notice:

a. Before calibration, a ctivate this device for at least 6 minutes to allow it run stably

b. When the device is alarming for low power, stop calibration and charge it right away

c. Calibration gas must be standard gas used for calibration purpose

d. Zero sensors firstly before calibration

e. Make sure gas flow is stable before connecting calibration gas, calibration gas flow for CH4,

CO, O2 is 200ml/min, 300ml/min for H2S.

f. Suggested calibration gases are

as following:

CH4 1.00%vol, CO 500ppm, H2S 50ppm, oxygen can be calibrated in fresh air

11. In setting interface, short press “ ▲ ” or “ ▼ ” to select among “CH4”, “LEL”, “PPM”,

“MG/m³ ”, “Allow Calibration”, “√ ” means item is selected. Long press “OK” button to

select a nd confirm. Short press “

” to exit.

Important: User can’t enter calibration i nterface without choosing “Allow Calibration”

4.

Technical Parameter:

Technical

Specification

Parameter

Measured gas Methane(CH4), Oxygen(O2),

Carbon Monoxide(CO), Hydrogen Sulfide(H2S)

Methane (CH4)

Measurement range (0.00~5.00)%vol

Measurement error

(0.00~1.00)%vol: ±0.10%CH4
(1.00~3.00)%vol: True value±10%
(3.00-5.00)%vol: ±0.30%CH4

Respond time

≤20s (T90)

Resolution

0.01%vol Alarm point

1.0

0%vol (Adjustable for full

range)

Oxygen (O2)

Measurement range (0.0~30.0)%vol

Measurement error

(0.0~5.0)%vol: O2:±0.5%vol

(＞5.0~30.0)%vol: O2:0.9%vol

Respond time

≤35s (T90)

Resolution

0.1%vol Alarm point

18.0%vol(Adjustable for full range)

25.0%vol(Adjustable for full range)

Carbon Monoxide (CO)

Measurement range (0~1000)ppm

Measurement error

(0~20)ppm:±2ppm

(＞20~100)ppm:±4ppm