Temtop PMS 10 Pump-Suction Laser Dust Monitor Instructions

: June 5, 2024
: Temtop

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PMS 10 Pump-Suction Laser Dust Monitor
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PMS 10 Pump-Suction Laser Dust Monitor

PMS 10
Specifications of Pump-Suction Laser Dust
Monitor

PMS 10

1. Product Overview

PMS10 series is a pump-suction laser particle (dust) monitor specially designed to provide solutions for the online monitoring industry of atmospheric environment.

It is widely used in micro air monitoring station, dust monitoring, oil-smoke monitoring and other air monitoring systems.

2. Produce Features

Benchmarking β-ray method adopted, enjoying higher accuracy and correlation
Equipped with four-wire brushless vacuum pump, enjoying higher sampling efficiency
All-metal precise optical-mechanical structure, stable operation in multiple scenes
Small size, convenient for integrated use of multiple devices
Continuous operation for 10,000 hours normally

3. Working Principle

This monitor relies on MIE scattering principle to monitor the concentration of particles. When the outside air passes through the light collection chamber uniformly, the particles in the sampled gas will scatter through the light beam. The photoelectric collection unit converts the scattered light signal into a voltage pulse signal, which is converted into a digital signal after pre-amplification and AD conversion. The number of voltage pulses measured is the number of particles, and the amplitude of voltage pulses reflects the size of optical equivalent size of particle. The standard substance is used to calibrate the monitor after the particle conversion, so as to determine the concentration of particles in the testing environment.

3.1 MIE scattering principle

A scattering occurred when the diameter of particles in the atmosphere is equal to the wavelength of radiation is called the MIE scattering. The scattering intensity of MIE scattering is inversely proportional to the second power of the wavelength. Unlike Rayleigh scattering enjoying a symmetrical distribution, MIE scattering has stronger scattering in the forward direction than in the backward direction, with a more obvious directivity.

3.2 Optical-mechanical structure and principle

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Fig. 1 Analysis Chart of Light Refraction

4. Specifications of Particle Monitor

Parameters

|

Values

|

Unit

|

Remarks

---|---|---|---

PM2.5 accuracy

|

0-100μg/m³

|

±10

|

μg/m³

|

—–

100μg/m³

|

±10

|

%

|

—–

PM1.0 measurement
range

|

0-2000

|

μg/m³

|

—–

PM2.5 measurement
range

|

0-5000

|

μg/m³

|

—–

PM10 measurement
range

|

0-5000

|

μg/m³

|

—–

TSP measurement range

|

0-10000

|

μg/m³

|

—–

Resolving power

|

1

|

μg/m³

|

—–

Sampling interval

|

60

|

s

|

Set by users

Sampling time

|

60

|

s

|

Set by users

Sample time

|

10

|

s

|

—–

Service life

|

10000

|

h

|

—–

Counting efficiency

|

50％ for 0.3µm

|

—–

|

As per JIS

100% for more than 0.5μm

Flow

|

1.1

|

L/min

|

Error±5%

Weight

|

350

|

g

|

—–

Maximum size

|

1138838

|

mm

|

Excluding the size of airinlet and outlet, terminal

Table 1 Specifications of Particle Monitor

5. Electrical Specifications

5.1 Electrical properties

Standard output (Temperature 25℃, humidity 0-50% RH and 12V power supply voltage).

Parameters

|

Values

|

Uni t

---|---|---

Rated voltage

|

DC 12

|

V

Standby current

|

30

|

mA

Average current

|

350

|

mA

Maximum current

|

400

|

mA

Starting current

|

700

|

mA

High-level input voltage

|

6

|

V

Low-level input voltage

|

-6

|

V

High-level output voltage

|

6

|

V

Low-level output voltage

|

-6

|

V

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PMS 10

Table 2 Electrical Properties

5.2 Absolute limit values

The reliability of the device may be affected under the limit conditions for a long time.

Exceeding the following parameters range (Table 3) may cause permanent damage to the device.

Parameters

|

Range

---|---

Power supply voltage

|

11.5-12.5V

Voltage at I/O pin

|

-6-6 V

Working temperature range

|

-10-60 °C

Storage temperature range

|

-20-70 °C

Working humidity range

|

0-95%RH (non-condensation)

Lightning surge

|

2KV

Static electricity

|

1KV for terminal test
8KV for test voltage of other surfaces

Table 3 Absolute Limit Values

6. Definition of Hardware Interface

Fig.2 Hardware Interface

Pin

|

Name

|

Description

|

Note

---|---|---|---

1

|

VCC

|

Device power supply
(positive)

|

12V

2

|

GND

|

Device grounding

|

——

3

|

TX（A）

|

Communication sending pin

|

(RS485+) serial sending

4

|

RX（B）

|

Communication receiving pin

|

(RS485-) serial receiving

5

|

NC

|

——

|

——

Table 4 Definition of Hardware Interface

7. Communication Protocol

UART parameters:

Baud rate: 9600
Data bit: 8
Check bit: None
Stop bit: 1

Communication mode:

RS485 (Slave in receiving state, one for questioning and one for answering)

Address:

The default out-of-factory address of the monitor is 01.

Command mode:

The slave (monitor) is in the receiving state, only responding to the command of the host, not actively sending the command.

Checksum:

It is the sum of all bits except the check bits, with high bytes before low bytes.

Working mode:

Continuous measurement: The monitor works continuously;
Intermittent mode: The sampling time/sampling interval can be set (The intermittent time can be set by the users, and the monitor normally responds to the command of the host during the intermittent mode)
The default out-of-factory setting of the monitor is intermittent mode, measuring for 60s and stopping for 60s

7.1 Format of host communication protocol

The length of the command sent by the host is fixed to 8 bytes, as shown in Table 5.

Start symbol 1

|

Start symbol 2

|

Slave address

|

Command

|

High data

|

Low data

|

High check

|

Low check

---|---|---|---|---|---|---|---

0x4A

|

0x43

|

ADDR

|

CMD

|

DATAH

|

DATAL

|

0xXX

|

0xXX

Table 5 Host Command Format

See Table 6 for the description of host command.

Command

|

Data high

|

Data low

|

Definition

---|---|---|---

0x01

|

0x00

|

0x00

|

Obtaining the concentration value

0x02

|

0x00

|

0x00

|

Starting the measurement, the monitor works according to the mode (intermittent measurement/continuous measurement).

0x01

|

Stopping the measuring, the monitor stops working.

0x03

|

0x00

|

0x00

|

Starting the continuous measurement mode, the monitor works continuously.

0x01

|

Starting the intermittent measurement mode, the sampling time and sampling interval are set by the users.

0x04

|

0xXX

|

0xXX

|

Sampling time (20-3600, s)

0x05

|

0xXX

|

0xXX

|

Sampling interval (20-3600, s)

0x06

|

0xXX

|

0xXX

|

Modify the device address (1-255)

Table 6 Description of Host Command

7.2 Format of host communication protocol

The response length of slave is not fixed and changed according to the command of host, as shown in Table 7.

Start symbol 1

|

Start symbol 2

|

Slave address

|

Command

|

High data length

|

Low data length

|

High data 0

|

Low data 0

---|---|---|---|---|---|---|---

0x4A

|

0x43

|

ADDR

|

CMD

|

LENH

|

LENL

|

DATA0H

|

DATA0L

High data 1

|

Low data 1

|

……

|

……

|

High data N

|

Low data N

|

High check

|

Low check

DATA1H

|

DATA1L

|

……

|

……

|

DATANH

|

DATANL

|

0xXX

|

0xXX

Table 7 Response Format of Slave

Note: The address/function code is defined by the host (After modifying the device address, the address in the protocol is updated to the new address); see 7.3 command example for the specific response data of slave.

7.3 Command examples

7.3.1 Obtaining the concentration value (command: 0x01)

After the host sends the command to obtain the current concentration, the slave returns the current concentration data package. The specific contents are as shown in Table 8.

Slave:

Data No.

|

Data

|

Definition

---|---|---

Start symbol

|

0x4A

|

Frame header

Start symbol

|

0x43

|

Frame header

Address

|

0x01

|

Slave address

Command

|

0x01

|

Command

High data length

|

0x00

|

Data length, 24 bytes totally

Low data length

|

0x18

High data 1

|

0xXX

|

PM1.0 mass concentration (atmospheric environment), unit: μg/m³

Low data 1

|

0xXX

High data 2

|

0xXX

|

PM2.5 mass concentration (atmospheric environment), unit: μg/m³

Low data 2

|

0xXX

High data 3

|

0xXX

|

PM10 mass concentration (atmospheric environment), unit: μg/m³

Low data 3

|

0xXX

High data 4

|

0xXX

|

TSP (atmospheric environment), unit: μg/m³

Low data 4

|

0xXX

High data 5

|

0x00

|

For later extended use

Low data 5

|

0x00

High data 6

|

0x00

|

For later extended use

Low data 6

|

0x00

High data 7

|

0x00

|

For later extended use

V2.1-3.2021 7/12

PMS 10

Low data 7

|

0x00

|

---|---|---

High data 8

|

0x00

|

For later extended use

Low data 8

|

0x00

High data 9

|

0x00

|

For later extended use

Low data 9

|

0x00

High data 10

|

0x00

|

For later extended use

Low data 10

|

0x00

High data 11

|

0x00

|

For later extended use

Low data 11

|

0x00

High data 12

|

0x00

|

For later extended use

Low data 12

|

0x00

High checksum

|

0xXX

|

Checksum

Low checksum

|

0xXX

Table 8 Concentration Command Format of Slave Response

Example:

Host

|

0x4a 0x43 0x01 0x01 0x00 0x00 0x00 0x8F

---|---

Slave

|

0x4a 0x43 0x01 0x01 0x00 0x18 0x00 0x16 0x00 0x23 0x00 0x2C 0x00 0x2F 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x01 0x3B

In the above example, the specific values of PM1.0, PM2.5, PM10 and TSP are as follows: PM1.0 = 0x0016 = 22μg/m³

PM2.5 = 0x0023 = 35μg/m³

PM10 = 0x002C = 44μg/m³

TSP = 0x002F = 47μg/m³

7.3.2 Start/stop (command: 0x02)

After the host sends the start/stop command, the slave performs the corresponding action and returns the response command;

When the slave performs the commands 0x03, 0x04, 0x05 and 0x06, it returns the same format of response, as shown in Table 9.

Slave:

Data No.

|

Data

|

Definition

---|---|---

Start symbol

|

0x4A

|

Frame header

Start symbol

|

0x43

|

Frame header

Address

|

0x01

|

Slave address

Command

|

0x02

|

Command

High data length

|

0x00

|

Data length

V2.1-3.2021 8/12

PMS 10

Low data length

|

0x02

|

---|---|---

High data 1

|

0x00

|

Replying data is the same as that of the host

Low data 1

|

0x00/0x01

High checksum

|

0xXX

|

Checksum

Low checksum

|

0xXX

Table 9 Performing Command Format of Slave Response

Example:

Host

|

Start the measurement:

0x4a 0x43 0x01 0x02 0x00 0x00 0x00 0x90 Stop the measurement:

0x4a 0x43 0x01 0x02 0x00 0x01 0x00 0x91

---|---

Slave

|

Start the measurement:

0x4a 0x43 0x01 0x02 0x00 0x02 0x00 0x00 0x00 0x92 Stop the measurement:

0x4a 0x43 0x01 0x02 0x00 0x02 0x00 0x01 0x00 0x93

7.3.3 Setting measurement mode (command: 0x03)

The host sends the command to set the measurement mode, the slave performs the corresponding mode selection, and then writes the measurement mode set by the users into the memory cell.

Host

|

Continuous measurement:

0x4a 0x43 0x01 0x03 0x00 0x00 0x00 0x91 Intermittent measurement:

0x4a 0x43 0x01 0x03 0x00 0x01 0x00 0x92

---|---

Slave

|

Continuous measurement:

0x4a 0x43 0x01 0x03 0x00 0x02 0x00 0x00 0x00 0x93 Intermittent measurement:

0x4a 0x43 0x01 0x03 0x00 0x02 0x00 0x01 0x00 0x94

7.3.4 Setting sampling time (command: 0x04)

The host sends the command to set the sampling time, and the slave writes the time to the memory cell and returns the response command. The minimum unit of time setting is seconds, and the minimum setting time is 20 seconds, with 3600 seconds as the maximum. The 600 seconds (0x0258) setting is taken as an example

Example:

Host

|

0x4a 0x43 0x01 0x04 0x02 0x58 0x00 0xEC

---|---

Slave

|

0x4a 0x43 0x01 0x04 0x00 0x02 0x02 0x58 0x00 0xEE

7.3.5 Setting intermittent time (command: 0x05)

V2.1-3.2021 9/12

PMS 10

The host sends the command to set the sampling time, and the slave writes the time to the memory cell and returns the response command. The minimum unit of time setting is seconds, and the minimum setting time is 20 seconds, with 3600 seconds as the maximum. The 60 seconds (0x003C) setting is taken as an example.

Example:

Host

|

0x4a 0x43 0x01 0x05 0x00 0x3C 0x00 0xCF

---|---

Slave

|

0x4a 0x43 0x01 0x05 0x00 0x02 0x00 0x3C 0x00 0xD1

7.3.6 Modifying slave address (command: 0x06)

The host sends the command to modify the slave address. The slave writes the modified address to the memory cell and returns the response command. The minimum address that the slave can set is 01 and the maximum address is 255. If the set address exceeds the limit, the default is 01. The modification of the address from 01 to 02 is taken as an example.

Example:

Host

|

0x4a 0x43 0x01 0x06 0x00 0x02 0x00 0x96

---|---

Slave

|

0x4a 0x43 0x02 0x06 0x00 0x02 0x00 0x02 0x00 0x99

8. Dimension Drawing

dimension drawing

Fig.3 Dimension Drawing of PMS 10

9. Precautions for Installation and Operation

9.1 Precautions

When the monitor is used for the outdoor fixed equipment, the protection of sandstorm, rain and snow and fluffy catkins shall be completed by the outdoor equipment provider.
The device is equipped with a laser transmitter internally, which may cause the operation personnel to be accidentally exposed to laser radiation due to private maintenance. The maintenance of the device shall be performed by the manufacturer’s special personnel.
It is forbidden to open the device shell for use.
As the monitor is not directly in contact with the monitoring environment (for example, installed in the equipment enclosures), the air inlet of the monitor shall be connected to the external probe of the enclosure, with the length of the connecting hose between them controlled within 30cm, so as to obtain accurate measurement results of sampling;
The external probe of the enclosure shall have the ability of wind proof, coarse filtration and water proof;
In case of the increasing humidity, the data between the monitor and Beta attenuation mass monitor may have a positive deviation, so the users need to provide a dynamic heating system to ensure the data correlation with Beta attenuation mass monitor.