Handheld Multi Gas Detector Operating Instructions
Model: CM501, CM503,CM504, CM505, CM506, CM507, CM510
Product Overview
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NDIR (CO2), EC (CO, NH3), and Fluorescence quenching by Oxygen (O2) is used to
measure gas concentrations.
Measurement items:
Basic: CO
2
, CO, PM2.5, PM10, RH, DP, AMB, Barometer
Optional: O
2
, NH3
Large LCD for easy reading of gas concentration and temperature and humidity.
Audible alarm
Data logging with SD card
Through the RS485 interface connection, multiple CM500 units can be connected to the back-end computer
system as a security monitoring application.
Built in the LCD backlight for easy reading in the dark.
This device is supplied with Li- ion 18650 3.7V rechargeable batteries, can be used for a long time.
A. Power Key
B. Humidity Sensor
C. Temperature Sensor
D. LCD
E. Charge Lamp
F. M1 (Zone 1 Mode Key)
G. UP\TWA\STEL\Max\Min
H. M2 (Zone 2 Mode Key)
I. Enter
J. DOWN\ALTI
K. Log (Data Logger)
L. USB Socket
M. SD Card Slot
N. RS485 Jack
O. Battery Cover
P. Stand
Q. Screw Position
R. Tripod Screw
Key description:
M1 (
○
F
)
Zone 1 sensor selection (CO
2
, CO, O
2
, AMB)
M2 (
○
H
)
Zone 2 sensor selection (CO
2
, CO, O
2
, NH3, RH, DP, AMB, PM2.5, PM10)
▲
(
○
G
)
TWA (CO
2
, 8-hr time weighted average), STELL ON DEVICE, (CO
2
, 15 min. weighted
average), MAX, MIN
▼
(
○
J
)
ALTI (Atmospheric pressure)
Enter (
○
I
)
Execute a command or select options.
Log (
○
K
)
Data logger
LCD display symbol description:
Symbol
Description
Basic
○
Optional
△
Buzzer On
○
CO
2
concentration, parts per million (ppm)
○
CO concentration, parts per million (ppm)
○
PM2.5 dust concentration
(µg/m
3)
○
PM10 dust concentration (µg/m
3)
△
O
2
concentration (%)
△
NH3 concentration pp
m
(parts per
million
)
△
Battery capacity
○
Atmospheric pressure
○
Time weighted average (8 hours)
○
STELL
Short
‐
Term Exposure Limit
(15 min. weighted average)
○
Maximum value
○
Minimum value
○
Ambient temperature
○
Relative humidity
○
Dew point
○
Real-time setting display
○
Year
display
○
High/low gas concentration calibration
○
High/low gas concentration alarm
○
Display cycle
○
SD card
○
Operation Instructions
Power on:
Switch the Power Key (
○
A
) on.
Measurement:
After power on, the device starts to measure and update the data every second.
Press the “
M1
”
key (
○
F
) to switch the Zone 1 sensor display. (CO
2
→
CO
→
O
2
→
AMB)
Press the “
M2
” key (
○
H
) o switch the Zone 2 sensor display.
(CO
2
→
CO
→
O
2
→
NH3
→
RH
→
DP
→
AMB
→
PM2.5
→
PM10)
°C/°F
switch:
When the temperat
ure is displayed on the screen, press the "▲"
key (
○
G
) to switch
°
C/°F.
Backlight:
The backlight appears on the screen during startup and operation. After the device is idle for 30 seconds, the
backlight is automatically turned off to extend battery life.
Display all sensor readings
Press the “
M2
” key (
○
H
) for more than 3 seconds and the screen displays
. Zone 2 displays readings
of all sensors sequentially in time intervals. If you need to increase the display interval time, long press the
“
M2
” key (
○
H
).The interval time will automatically inc
rease (1+0.5+0.5…..
max. 10 seconds) , and release
the “
M2
” key (
○
H
), the readings will be displayed according to the last set interval. If press the “
M2
” key (
○
H
)
again for more than 3 seconds, the
function can be cancelled.
Real-time setting:
Long press the
“
M1
” key (
○
F
) to proceed the date and time setting. The default format is 24-hour. Press the
“▲(
○
G
)/
▼(
○
J
)
” key
to edit the parameters, and press the
“
Enter
” key
(
○
I
) to proceed the next setting. The
setting sequence is: year
→
month
→
day
→
hour
→
minute. After finishing the real-
time setting, press the “
M1
”
key (
○
F
) to continue the alarm setting.
Alarm settings:
The setting order of the sensors is CO
2
→
CO
→
O
2
→
HN3
→
PM2.5. Press the "Enter" key (
○
I
) to switch the
high/low gas concentration alarm setting. Press “▲(
○
G
)/
▼(
○
J
)
” key to edit the parameters,
and then press
the
“
M1
” key (
○
F
) to proceed the next sensor alarm value settings. After settings, press and hold the “
M1
” key
(
○
F
) to return to the main screen.
Data logging:
Press the “
Log
” key (
○
K
) for 3 seconds and the screen displays
to start the data logging function, long
press the “
Log
” key (
○
K
), this function can be canceled. When
flashes, it means that the SD card is
broken or full; when
remains stationary, it indicates normal operation.
Data logging interval time setting:
The default interval time is 00:02 (2 seconds). Press the “
Log
”
key (
○
K
) for more than 3 seconds and then the
interval time will automatically increase. The interval time, loop display, ranges from 00:02 seconds to 60:00
minutes and then back to 00:02 seconds. The interval time
≦
5 minutes, the buzzer on/off switch is controlled
by the “
Enter
”
key (
○
I
); the interval time is
≧
5 minutes, the buzzer is off.
Atmospheric pressure display:
Press "▼"
key (
○
J
), and then press "▲" key (
○
G
) to select
Altitude (M)
→
Altitude (ft)
→
Barometer (mmHg)
.
The display returns to the main screen after 10 seconds.
Atmospheric pressure compensation:
Press and hold the "▼" key (
○
J
) to turn the compensation function on/off. The gas compensation is only for
CO
2
and O
2
.
Buzzer on/off:
P
ress 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.
(Display Features and Modes)
Disclaimer! Please note, dependent on purchased model, some functionalities
differentiate based on sensor configuration.
Thank you for selecting CM-500 handheld multi gas detector.
With long-term data storage, t
he CM-500 is
designed to simultaneously measure multiple gas concentrations in the ambient environment.
When
CM-500 measures the gas concentration reaching the alarm setting or higher, the data display and alarm
functions are activated. CM-500 is equipped with an RS485 interface for connecting to a computer for
remote monitoring to reduce the risk of exposure to high concentrations of harmful gases and avoid
harm to human health. The Handheld Gas Detector can be used in a wide range of industries, which
include paint-related industries, wineries, related industries of CO
2
, food industry, laboratory, construction
industry, etc.
Features:
