background image

Buzzer on/off: 

Press the “

Enter

” key (

I

) to turn the buzzer on/off. During

  operation, if 

AL L

 or 

AL H

 buzzer 

sounds, 

 stops to operate. At this time, press the “

Enter

” key (

I

) to turn off the buzzer and 

continue

. In addition, the buzzer will be automatically turned off when the data logging interval time 

is 

5 minutes. 

Buzzer AL L/AL H: 

When 

AL L

 is on, the buzzer sounds "Ta Ta Ta"; when 

AL H

 is on, the buzzer sounds "Bi Bi Bi". 

 
RS485 communications:

 

Please use the 4 Pole 3.5mm headphone plug. The headphone plug contacts are defined as below:

 

 

For long-distance communication, it is necessary to use a dedicated isolated line to ensure communication 
quality. The wiring method is as below:

 

 

Power off: 

Switch the Power Key (

A

) off. 

Note: When the device is charged with USB, it cannot be turned off. 

 
Calibration: 
(1) Single-point calibration 

At the same time, long press “

(

G

)“ and “

(

J

)“ key, 

CAL

 is displayed on the screen. Press the “

M1

” key 

(

F

) to select the sensor that needs to be calibrated. Press the “

(

G

)/

(

J

)” key to edit the parameters, 

and then press the “

Enter

” key (

I

) to proceed the next setting. Zone1 displays the unadjusted raw value; 

Zone2 displays the adjusted value, and it is also the value of returning to the main screen; 
Zone1-Zone2=adjustment amount. After finishing the setting, press and hold the “

M1

” key (

F

) to return to the 

main screen.

 

         

 

(2) Two-point calibration 

At the same time, long press “

(

G

)“ and “

(

J

)“ key, 

CAL

 is displayed on the screen. And then long press 

the “

M2

” key (

H

), 

CAL L

 is displayed on the screen. Next, press the “

M1

” key (

F

) to select the sensor that 

needs to be calibrated (CO

2

CO

O

2

NH3

PM2.5

RH

AMB) and the corresponding unit will blink. 

Press "

(

G

)/

(

J

)" key to adjust the value of the standard gas concentration. Press “

Enter

“ key (

I

) to 

switch

 CAL H 

(High gas concentration calibration)/

CAL L 

(low gas concentration calibration). The ppm unit is 

not flashing for a moment, indicating that the calibration value has been stored. Long press the “

M2

” key (

H

for a calibration calculation. At the same time, the screen displays the calibration reading to confirm the 
accuracy. Short press the “

M1

” key (

F

) to set the next gas calibration, or long press the “

M1

” key (

F

) to 

return to the main screen. 

         

 

 
Clear Two-point calibration: 

Set the same calibration value for 

CAL L 

and 

CAL H

, and then proceed the calculation. After the calibration is 

completed, the original calibration value is cleared.

 

 

 
 

Rechargeable Batteries 

Battery message: 

 

 

 

‘Battery OK’:   

Measurements are possible 

‘Battery Low’:   

The battery needs to be recharged, 

measurements are still possible 

‘Battery Exhausted’: 

Measurements are not possible 

Battery installation:   

This device is supplied with Li-ion 18650 3.7V rechargeable battery *3 pcs.

 

Please confirm whether bat polarity are Li ion18650 positive bump specification and install batteries in 
the correct polarity. If the battery polarity is reversed, the capacity will be insufficient and the battery life will be 
shortened. 

Battery charging: 

The charge lamp (

E

) lights up while charging; the charge lamp (

E

) goes off when charging is completed. 

(5V/1A USB adapter charger) 

Note: During battery charging, the temperature of the device will rise by 5°C~10°C. At this time, the 
measurements of temperature and humidity will be affected by temperature rise. Cause an impact on 
the accuracy of temperature when charging, please use a fan to blow toward the temperature sensor 
(

C

) directly in order to get a compensated balance of temperature and humidity between temperature 

sensor and surrounding area.

 

 

Safety Instructions 

Warning: 

Your safety is very important to us. To ensure to use the device correctly and safely, we would like 

to draw your attention to read the warning and entire User Manual before using the device. These 
are important safety information and should be observed at all times. 

1. Please handle the device lightly, do not subject the device to impact or shock. 
2. Do not immerse the device in water. Water can cause electric shock, fire or malfunction which may result in 

damage. 

3. Do not keep the device under the hot and moisture environment. Keep the device away from the heat 

source or near water. 

4. Please use a standard USB power supply (such as PC's USB port, universal AC adapter with USB port). 

Improper power supply can cause serious damage to the device, or result in injury or death to the user. 

 

Product Care 

To ensure you receive the maximum benefit from using this device, please observe the follow guidelines.

 

1. 

The maximum capacity of the SD card is 16G.

 

2. 

During battery charging, the temperature of the device rises. The temperature and humidity sensors are 

affected. At this time, measurements are only for reference. After batteries are fully charged and the device 
cools down, measurements are reliable.

 

3. 

Repair

 

– 

Do not attempt to repair the device or modify the circuitry by yourself. Please contact with the 

local dealer or a qualified repairman if the device needs servicing.   

4. 

Caution –

 The CO and NH3 sensors must be replaced every 3 years.

 

5. 

Cleaning –

 Disconnect the power before clean. Use a damp cloth, do not use the liquid cleaning agent, 

such as benzene, thinner or aerosols.       

6. 

Maintenance

 – 

Recommend that the user conducts a comprehensive test and calibration every year to 

ensure the normal operation of the device. 

 

Specifications 

 Measurement 

Range 

Accuracy Display 

Resolution 

CO

2

 

0~9,999ppm   
(5,001~9,999ppm 
over range) 

±50ppm or 5% of reading, 
whichever is greater (0~5,000ppm) 

1ppm 

CO 

0~1,000 ppm 

±5%~±10% 

1ppm 

O

2

 

0~25% <2% 

FS/0.1 

mbar  0.01% 

NH3 

0~100ppm ±10% 

1ppm 

PM2.5 
PM10 

999 ug/m

3

 

±15% or ±15 

μ

g/m³, whichever is 

greater 

1 ug/m

3

 

RH 

0~100% RH 

±3%@25°C (20~80% RH), others 
±5% 

0.01% 

Temperature 

0~50

°

C ±1

°

C 0.01

°

Barometer 

50~110 kPa 

±0.4kPa 

0.1 mmHg 

Operating 
Conditions

 

0~40°C (32~104°F), 0~95% RH, non-condensing, with lithium-ion batteries 
0~50°C (32~122°F), 0~95% RH, non-condensing, without lithium-ion batteries 

Storage 
Temp. 

-20~60°C (-4~140°F), 0~85% RH, non-condensing, without lithium-ion. batteries 

Power 
Supply 

Rechargeable Battery : Li-ion 18650 3.7V *3 (batteries not included) 
AC Adapter : 5V±5% >1A, 100~240 VAC, 50/60 Hz 

Storage 
Capacity 

depend on SD card capacity (max.16G SD card) 

Comm. 
Interface

 

RS485 ModBus BR19200

N

8

1  

Alarm 
Volume 

80db±5%@10cm 

Weight 

305g (without batteries) 

Dimension 

204.5x91.7x49.6 mm (8.1x3.6x2 inch) 

Note: 

After power-on, it would take 20 minutes for the device to stably measure the temperature and 

relative humidity. 

EMC/RFI: 

Readings may be affected if the unit is operated within radio frequency electromagnetic field   
strength of approximately 3 volts per meter, but the performance of the instrument will not be   
permanently affected. 
 

Installation Instruction 

1. You can put ZG906CMONP on the table (please pull out the Housing Stand

P

) or hang it on the wall.   

2. Please note the following when hanging it on the wall. Choose a suitable location to install ZG906CMONP, 
fix a

 

screw to the wall.

 

 

Package contents 

Handheld multi gas detector 
Manual 
USB 1.5M cable 
 
 

 

Radiant Innovation Inc.    Http://www.ZyAura.com

 

1F, No.3, Industrial East 9

th

 Road, Science-Based Industrial Park, HsinChu, 

Taiwan 300. 

 
 

Ref.No.

122018 

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