Senseca PMsense-M Particulate Matter Transmitter Instruction Manual

Senseca PMsense-M Particulate Matter Transmitter

Specifications

• Particulate Matter: PM1.0, PM2.5, PM10
• Measuring principle: Laser scattering
• CO2 Measurement: Optional for PMBsense
• Output: RS485, Analog 0/4…20 mA, 0…10 V
• Measurement Models: PMsense-M, PMsense-A, PMsense-V, PMBsense-M, PMBsense-A, PMBsense-V
• Sensor Lifetime: Maintenance-free with long operating life

Product Usage Instructions

Installation

The transmitter should be installed using the fixing bracket provided. Ensure proper air inlet and outlet as shown in Fig. 3.1.

Electrical Connections

The transmitter comes with an M12 8-pole circular connector. Use the CPM12-8PM… optional cables for connections.

Connector Pinout:

• GND (Power supply negative) – Blue wire

• +Vdc (Power supply positive) – Red wire

• Other wires: Brown, White, Grey, Yellow, Green

• Ensure proper grounding by connecting the cable shield to the ground for noise immunity.

Connections

RS485 output and analog outputs connections can be made to PLCs, data loggers, or converters for PC communication. Set the address and communication parameters before connecting to the RS485 network.

FAQ

• Q: Can the transmitter be used for indoor air quality monitoring?
  • A: The transmitter is suitable for outdoor air quality monitoring. For indoor use, consider additional factors.
• Q: Is the CO2 sensor included with all models?
  • A: The CO2 sensor is optional and integrated in the PMBsense models only.

Introduction

PMsense is a PM1.0, PM2.5 and PM10 Particulate Matter transmitter suitable for outdoor air quality monitoring. The dust particles concentration is measured using the laser scattering principle. An optional CO2 sensor can be integrated in the transmitter (PMBsense). The transmitter has a digital RS485 output with MODBUS-RTU or ASCII proprietary protocol. A version with two additional 0/4…20 mA (0…10 V on request when order-ing) analog outputs is available. The two analog outputs can be independently associ-ated with any of the measured parameters. The measuring circuit of the transmitter can be operated in continuous mode or, in order to extend the PM sensor lifetime, at cyclic intervals (default operating mode). The measuring cycle interval is user- configurable. The transmitter is maintenance-free and has fast response, high sensitivity, excellent stability and long operating life.

Models

Technical specifications

Particulate Matter

Measuring principle| Laser scattering
Measured pollutants| PM1.0, PM2.5 and PM10
Measuring range| 0…1000 µg/m3 (for each pollutant)
Particle size detection range| Æ 0.3…10 µm
Linearity error| < 5%
Repeatability| < 3%
Sensor warm up time| 15 s
Sensor lifetime| 5 years approx. in 5 minutes cyclic operating mode (default)

10,000 hours in continuous operating mode (1 meas./s)

Temperature drift| < 0.01 µg/m3/°C
CO 2 ( only PMBsense… )
Measuring principle| Double wavelength NDIR
Measuring range| 0…5000 ppm
Accuracy| ±(50 ppm+3% of measurement) @ 25 °C and 1013 hPa
Response time| < 120 s (air speed= 2 m/s)
Long-term stability| 5% of measurement / 5 years
Temperature drift| 1 ppm/°C
General specifications
Output| RS485 with Modbus-RTU or ASCII proprietary protocol

2 x analog 0/4…20 mA (RLmax = 500 W) – Only P[B]Msense-A 2 x analog 0…10 V (RLmin = 10 kW) – Only P[B]Msense-V

Power supply| 7…30 Vdc

(15…30 Vdc for 0…10 V analog outputs)

Power consumption| 25 mA @ 24 Vdc during measurement

4 mA in stand-by (only for cyclic operating mode)

The indicated consumption does not include the consumption due to the analog outputs

Connection| M12 8-pole circular connector
Operating conditions| -20…+70 °C / 0…95 %RH / 500…1500 hPa
Housing material| Polycarbonate
Protection degree| Housing equipped with a rain-proof and UV-resistant inlet air filter – IP 53
Dimensions| 120 x 94 x 71 (excluding M12 connector)
Weight| 330 g

Installation

The transmitter is equipped with a bracket with U-bolt for the fixing to a Ø40…50 mm mast. It can be fixed to a wall using the bracket only, by removing the U-bolt.

Electrical connections

The transmitter has a M12 8-pole circular connector and uses the CPM12-8PM… optional cables, with M12 8-pole connector on one side and open wires on the other side

Connector pin N°| Function| CPM12-8PM…

wire color

---|---|---
1| GND (Power supply negative)| Blue
2| +Vdc (Power supply positive)| Red
3| Not used| —
4| DATA – (RS485)| Brown
5| DATA + (RS485)| White
6| SGND (Digital and analog outputs ground)*| Grey
7| AOUT1 (Analog output 1 positive)| Yellow
8| AOUT2 (Analog output 2 positive)| Green
 | Cable shield **| Black (thick wire)

• The output ground (SGND) and the negative of the power supply (GND) are short-circuited inside the transmitter.
• The cable shield is not connected to the M12 connector.
• To ensure a good noise immunity, it is recommended to connect the cable shield to ground (GND).

RS485 output and analog outputs connections

RS485 output:

The RS485 output is not isolated. Before connecting the sensor to the RS485 network, set the address and the communication parameters, if different from the factory preset

Current analog output (only PM[B]sense-A):

By default, the current analog outputs are 4…20 mA, with:

• 4 mA = 0 μg/m3
• 20 mA = 1000 μg/m3

The analog output 1 is associated by default to PM2.5. The analog output 2 is associated by default to PM10.
With the commands of the proprietary protocol, it is possible to associate the analog outputs to different parameters, set the range 0…20 mA for the output and reverse the direction of the output, so that the output decreases as the measurement increases.
In case of measurement error, the output goes to 22 mA.

Voltage analog output (only PM[B]sense-V):

By default, the voltage analog outputs are 0…10 V, with:

• 0 V = 0 μg/m3
• 10 V = 1000 μg/m3

The analog output 1 is associated by default to PM2.5. The analog output 2 is associated by default to PM10. With the commands of the proprietary protocol it is possible to associate the analog outputs to different parameters, set the range 2…10 V for the output and reverse the direction of the output so that the output decreases as the measurement increases. In case of measurement error, the output goes to 11 V.

Configuration and measurement

The configuration of the instrument and the reading of the measurements can be done via the RS485 serial output, both with the proprietary protocol and with the MODBUSRTU protocol. In the first 10 seconds after the instrument power on, it is always active the proprietary protocol. After 10 seconds from power on, the operating protocol is activated, which by default is the MODBUS-RTU protocol. It is possible to keep the proprietary protocol active even after 10 seconds from power on by sending, before the 10 seconds expire, the command @ of the proprietary protocol. The proprietary protocol can be set as operating protocol by means of the DP0 command. The commands of the proprietary protocol and the registers of the MODBUS-RTU protocol are described in detail in the following chapters.

Particulate Matter measurement modes:

The transmitter can perform the PM measurement in continuous mode or, in order to extend the sensor lifetime, at cyclic intervals (default). In the measurement mode at cyclic intervals, the PM sensor is activated periodically for the ON time. The measurement is made available after 70 seconds from sensor activation (warm-up time). At the end of the ON time, the measurement is “frozen” and the sensor is deactivated until the set cyclic measurement interval expires.

The measurement mode, the cycle interval and the sensor ON time can be configured respectively by using the CPLS, CPLP and CPLO commands of the proprietary protocol or the holding registers with address 15, 16 and 18 of the MODBUS-RTU protocol.

The transmitter provides three types of measurements:

• average over a 10 seconds interval, updated every second;
• average over a 60 seconds interval, updated every 10 seconds;
• average over a 15 min interval, updated every minute.

For the measurement mode at cyclic intervals, the cycle interval and the ON time must be set consistently with the desired averaging interval.

Status of the transmitter:

There are two LEDs on the internal electronic board of the transmitter: the green LED indicates the presence of the external power supply (blinks once per second), the red LED indicates the presence of any measurement errors (normally off, it blinks twice per second if at least one of the measured parameters is in error).

ASCII proprietary protocol

To use the proprietary protocol, it is necessary to connect the instrument to the PC via a RS485/USB (e.g. RS51K) or RS485/RS232 converter and use a standard serial communication program. In the serial communication program, set the COM port number to which the instrument is connected and the communication parameters as follows:
• If the MODBUS-RTU protocol is set as the operating protocol in the instrument (default), set the Baud Rate 57600 and the parameters 8N2 in the serial communication program, then power cycle the instrument and send the command @ within 10 seconds from the instrument power on.
• If the proprietary protocol is already set as the operating protocol in the instru-ment, it is possible to operate with Baud Rate 57600 and parameters 8N2 by sending the command @ within 10 seconds from the instrument power on, or you can let the 10 seconds pass without sending the command @ and operate with the communication parameters set in the instrument (default 19200, 8E1). To change the instrument configuration, the serial command CAL USER ON must be sent first (the instrument replies with USER CAL MODE ON). The command CAL USER ON is automatically disabled after a few minutes of inactivity. If the settings should be only read, the command CAL USER ON is not required. Below is the list of the serial commands.

Instrument information:

Date of user calibration (CO2 only) Type of calibration active (CO2 only)

Protocol:

instrument power on. It must be sent within 10 seconds from instrument power on.
DPn| &|| Sets the operating protocol:

§ Proprietary if n=0

§ MODBUS-RTU if n=1

Default : MODBUS-RTU (n=1)

GP| & n|| Reads the operating protocol set in the instrument.
SM| &|| Activates the MODBUS-RTU protocol immediately.
CMAn| &|| Sets the instrument address for the MODBUS-RTU pro- tocol to n.

The address should range within 1 and 247.

Default : 1

RMA| & n|| Reads the instrument address for the MODBUS-RTU pro- tocol.

Note: after sending the DP1 command, the instrument remains with the proprietary protocol. Send the command SM to activate the MODBUS-RTU protocol immediately, or power cycle the instrument.

RS485 communication parameters

§ 1200 if n=0             ▪ 19200 if n=4

§ 2400 if n=1             ▪ 38400 if n=5

§ 4800 if n=2             ▪ 57600 if n=6

§ 9600 if n=3             ▪ 115200 if n=7

Default : 19200 (n=4)

RMB| & n|| Reads Baud Rate setting
CMPn| &|| Sets parity and stop bits:

§ 8N1 if n=0 [No parity, 1 stop bit]

§ 8N2 if n=1 [No parity, 2 stop bits]

§ 8E1 if n=2 [Even parity, 1 stop bit]

§ 8E2 if n=3 [Even parity, 2 stop bits]

§ 8O1 if n=4 [Odd parity, 1 stop bit]

§ 8O2 if n=5 [Odd parity, 2 stop bits] The number of data bits is fixed to 8.

Default : 8E1 (n=2)

RMP| & n|| Reads the setting of parity and stop bits.
CMWn| &|| Sets waiting time after transmission with MODBUS-RTU protocol:

§ Immediate reception if n=0 (violates protocol)

§ Waiting 3.5 characters if n=1 (respects protocol)

Default : Immediate reception (n=0)

RMW| & n|| Reads the setting of waiting time after transmission with MODBUS- RTU protocol.

PM measurement settings

§ Continuous if n=0

§ At cyclic intervals if n=1

Default : At cyclic intervals (n=1)

RPLS| & n|| Reads the setting of the PM measurement mode.
CPLPn| &|| Sets the cycle interval for the measurement mode at cy- clic intervals.

Default : 300 (=5 min)

RPLP| & n|| Reads the setting of the cycle interval for the measure- ment mode at cyclic intervals.
CPLOn| &|| Sets the sensor ON time for the measurement mode at cyclic intervals to n seconds.

It must be greater than 70 s (warm-up time).

Default : 71

RPLO| & n|| Reads the setting of the sensor ON time for the measure- ment mode at cyclic intervals.

Reading of the measurement information:

and the measurements sent by the transmitter in reply to P1, P5, S1 and S5 commands or when reading MODBUS Input Registers 0…5:

§ Average over a 10 seconds interval, updated every second if n=0

§ Average over a 60 seconds interval, updated every 10 seconds if n=1

§ Average over a 15 minutes interval, updated every minute if n=2

Default : Average over a 10 seconds interval, updated every second (n=0)

RPS| & n|| Reads the type of averaging for the measurements sent by the transmitter in reply to P1, P5, S1 and S5 commands.
P0| &|| Disable the sending of the measurement enabled with P1.
P1| &|| Enable the sending of the PM measurement every second (the sequence is the same described in command P5).
P5| & Measurements| Prints the PM measurements in the following sequence:

§ PM measurement error (0=no, 1=yes)

§ PM1.0 in N° of particles/ml

§ PM2.5 in N° of particles/ml

§ PM10 in N° of particles/ml

§ PM1.0 in µg/m3

§ PM2.5 in µg/m3

§ PM10 in µg/m3

The PM measurement is averaged according to what is set with CPS command or MODBUS holding register 19.

S0| &|| Disable the sending of the measurement enabled with S1.
S1| &|| Enable the sending of the measurement every second (the sequence is the same described in command S5).
S5| & Measurements| Prints the measurements in the following sequence:

§ PM measurement error (0=no, 1=yes)

§ PM1.0 in µg/m3

§ PM2.5 in µg/m3

§ PM10 in µg/m3

§ CO2 in ppm

§ Atmospheric pressure in hPa (internal sensor for CO2 measurement compensation)

§ Field not used

§ Field not used

§ Field not used

§ Power supply voltage

§ Internal board temperature

The PM measurement is averaged according to what is set with CPS command or MODBUS holding register 19.

Analog outputs (only PM[B]sense-A):

§ Offset disabled if n=0 (0…20 mA or 0…10 V)

§ Offset enabled if n=1 (4…20 mA or 2…10 V)

Default : Offset enabled (n=1) if the output is current, offset disabled (n=0) if the output is voltage

RA1O| & n|| Reads the setting of the offset for the analog output 1.
CA1SOn| &|| Sets the direct or inverse correspondence between analog output 1 and associated physical quantity:

§ 4 mA/0 V Þ Min. quantity, 20 mA/10 V Þ Max. quantity if n=0

§ 20 mA/10 V Þ Min. quantity, 4 mA/0 V Þ Max. quantity if n=1

Default : Direct correspondence (n=0)

RA1SO| & n|| Reads the type of correspondence (direct or inverse) be- tween analog output 1 and associated physical quantity.
CA1Tn| &|| Associates the analog output 1 to:

§ PM1.0 if n=0

§ PM2.5 if n=1

§ PM10 if n=2

§ CO2 if n=12 (only PMBsense-A)

Default : PM2.5 (n=1)

The PM measurement is averaged according to what is set with CPS command or MODBUS holding register 19.

RA1T| & n|| Reads the physical quantity associated to analog output 1.
CA1Ln| &|| Sets n as the minimum value of the measuring range of the physical quantity associated to the analog output 1.

If the output is associated to PM, the value must be ex- pressed as a number of tenths (e.g. n=5 to indicate 0.5

µg/m3). If the output is associated to CO2, the value must be expressed as a number of units (e.g. n=200 to indicate 200 ppm).

Default : 0

RA1L| & n|| Reads the minimum value of the measuring range of the physical quantity associated to the analog output 1.
CA1Hn| &|| Sets n as the maximum value of the measuring range of the physical quantity associated to the analog output 1.

If the output is associated to PM, the value must be ex- pressed as a number of tenths (e.g. n=50 to indicate 5.0

µg/m3). If the output is associated to CO2, the value must be expressed as a number of units (e.g. n=800 to indicate 800 ppm).

Default : 10000 (=1000.0 µg/m3 of PM)

RA1H| & n|| Reads the maximum value of the measuring range of the physical quantity associated to the analog output 1.
RA1F| & Quantity Minimum value Maximum value| Simultaneously provides the information obtainable with the RA1T, RA1L e RA1H commands.
Command| Reply| Description
---|---|---
CA2On| &|| Enable/disable the offset of the analog output 2:

§ Offset disabled if n=0 (0…20 mA or 0…10 V)

§ Offset enabled if n=1 (4…20 mA or 2…10 V)

Default : Offset enabled (n=1) if the output is current, offset disabled (n=0) if the output is voltage

RA2O| & n|| Reads the setting of the offset for the analog output 2.
CA2SOn| &|| Sets the direct or inverse correspondence between analog output 2 and associated physical quantity:

§ 4 mA/0 V Þ Min. quantity, 20 mA/10 V Þ Max. quantity if n=0

§ 20 mA/10 V Þ Min. quantity, 4 mA/0 V Þ Max. quantity if n=1

Default : Direct correspondence (n=0)

RA2SO| & n|| Reads the type of correspondence (direct or inverse) be- tween analog output 2 and associated physical quantity.
CA2Tn| &|| Associates the analog output 2 to:

§ PM1.0 if n=0

§ PM2.5 if n=1

§ PM10 if n=2

§ CO2 if n=12 (only PMBsense-A)

Default : PM10 (n=2)

The PM measurement is averaged according to what is set with CPS command or MODBUS holding register 19.

RA2T| & n|| Reads the physical quantity associated to analog output 2.
CA2Ln| &|| Sets n as the minimum value of the measuring range of the physical quantity associated to the analog output 2.

If the output is associated to PM, the value must be ex- pressed as a number of tenths (e.g. n=5 to indicate 0.5

µg/m3). If the output is associated to CO2, the value must be expressed as a number of units (e.g. n=200 to indicate 200 ppm).

Default : 0

RA2L| & n|| Reads the minimum value of the measuring range of the physical quantity associated to the analog output 2.
CA2Hn| &|| Sets n as the maximum value of the measuring range of the physical quantity associated to the analog output 2.

If the output is associated to PM, the value must be ex- pressed as a number of tenths (e.g. n=50 to indicate 5.0

µg/m3). If the output is associated to CO2, the value must be expressed as a number of units (e.g. n=800 to indicate 800 ppm).

Default : 10000 (=1000 µg/m3 of PM)

RA2H| & n|| Reads the maximum value of the measuring range of the physical quantity associated to the analog output 2.
RA2F| & Quantity Minimum value Maximum value| Simultaneously provides the information obtainable with the RA2T, RA2L e RA2H commands.

CO2 calibration (only PMBsense…):

A 2-point (CO21 and CO22 commands) or 1-point calibration (CO2O command) can be performed. The points are chosen by the user. To perform the calibration, the transmitter must be placed in an environment with a known CO2 concentration.
While the 2-point calibration allows moving the two calibration points independently, and therefore also to adjust the slope of the sensor response curve, the 1-point cali-bration simply adds an offset to the measurement (the two calibration points are shifted of the same amount) and is typically accomplished by placing the transmitter in clean air. Before performing the calibration, the type of calibration to be used must be set to “user” with the CC command. The transmitter allows manually setting, with the DA command, a string that is saved as the date and time of the calibration. The string must be set before performing the calibration.

The transmitter must first be placed in an environment with a known CO2 concentration (the value n entered in the command).

The value t in the reply to the command indicates the number of seconds required for the transmitter to com- plete the calibration operation. During this time, the transmitter sends strings notifying the progress of the operation; for example:

“CO2 calib. Status:IN PROGRESS 8% Avg:1096ppm Dev:0ppm”

At the end, the OK 100% notification indicates that the operation was successful; for example:

“CO2 calib. Status:OK 100% Avg:1100ppm Dev:7ppm”

CO22n| & t|| CO2 calibration in the second point at n ppm.

Operation is similar to the CO21 command.

CO2On| & t|| CO2 calibration at n ppm (1-point calibration – offset ad- adjustment).

Operation is similar to the CO21 command.

day/mm/dd hh:mm:ss| &|| Saves the string “aaaa/mm/gg hh:mm:ss” as the date and time when calibration is performed.

The command must be sent before performing the calibration.

GA| & yyyy/mm/dd hh:mm:ss| Reads the date and time saved with the DA command.
CCn| &|| Sets the type of calibration to be used:

§ User if n=0

§ Factory if n=1

Default : Factory (n=1)

CO2D| &|| Reset of user calibration.

Restoring the factory configuration:

Modbus-RTU protocol

By default, the instrument has MODBUS address 1 and communication parameters 19200, 8E1. The address and the communication parameters can be changed by using the appropriate serial commands of the proprietary protocol or, alternatively, directly with MODBUS commands by changing the value of the Coils and Holding Registers de-scribed later. The MODBUS-RTU protocol, if set as the operating protocol (default), is active after 10 seconds from the instrument power on. In order to change the instrument configuration using the MODBUS-RTU protocol, the value 1 must be written first in the Coil with address 1.

Below is the list of registers.

Input Registers:

Measurement averaged according to what is set with CPS command or MODBUS holding register 19.

| 16-bit Integer
1| PM2.5 in N° of particles/ml.

Measurement averaged according to what is set with CPS command or MODBUS holding register 19.

| 16-bit Integer
2| PM10 in N° of particles/ml.

Measurement averaged according to what is set with CPS command or MODBUS holding register 19.

| 16-bit Integer
3| PM1.0 in µg/m3 (x10).

Measurement averaged according to what is set with CPS command or MODBUS holding register 19.

| 16-bit Integer
4| PM2.5 in µg/m3 (x10).

Measurement averaged according to what is set with CPS command or MODBUS holding register 19.

| 16-bit Integer
5| PM10 in µg/m3 (x10).

Measurement averaged according to what is set with CPS command or MODBUS holding register 19.

| 16-bit Integer
6| PM1.0 in N° of particles/ml.

Measurement averaged over 10 s and updated every sec- ond.

| 16-bit Integer
7| PM2.5 in N° of particles/ml.

Measurement averaged over 10 s and updated every sec- ond.

| 16-bit Integer
8| PM10 in N° of particles/ml.

Measurement averaged over 10 s and updated every sec- ond.

| 16-bit Integer
9| PM1.0 in µg/m3 (x10).

Measurement averaged over 10 s and updated every sec- ond.

| 16-bit Integer
10| PM2.5 in µg/m3 (x10).

Measurement averaged over 10 s and updated every sec- ond.

| 16-bit Integer
Address| Description| Format
---|---|---
11| PM10 in µg/m3 (x10).

Measurement averaged over 10 s and updated every sec- ond.

| 16-bit Integer
12| PM1.0 in N° of particles/ml.

Measurement averaged over 60 s and updated every 10 s.

| 16-bit Integer
13| PM2.5 in N° of particles/ml.

Measurement averaged over 60 s and updated every 10 s.

| 16-bit Integer
14| PM10 in N° of particles/ml.

Measurement averaged over 60 s and updated every 10 s.

| 16-bit Integer
15| PM1.0 in µg/m3 (x10).

Measurement averaged over 60 s and updated every 10 s.

| 16-bit Integer
16| PM2.5 in µg/m3 (x10).

Measurement averaged over 60 s and updated every 10 s.

| 16-bit Integer
17| PM10 in µg/m3 (x10).

Measurement averaged over 60 s and updated every 10 s.

| 16-bit Integer
18| PM1.0 in N° of particles/ml.

Measurement averaged over 15 min and updated every mi- nute.

| 16-bit Integer
19| PM2.5 in N° of particles/ml.

Measurement averaged over 15 min and updated every mi- nute.

| 16-bit Integer
20| PM10 in N° of particles/ml.

Measurement averaged over 15 min and updated every mi- nute.

| 16-bit Integer
21| PM1.0 in µg/m3 (x10).

Measurement averaged over 15 min and updated every mi- nute.

| 16-bit Integer
22| PM2.5 in µg/m3 (x10).

Measurement averaged over 15 min and was updated every mi- nute.

| 16-bit Integer
23| PM10 in µg/m3 (x10).

Measurement averaged over 15 min and updated every mi- nute.

| 16-bit Integer
26| PM measurement error: 0=no, 1=yes.| Intero 16 bit
28| CO2 in ppm.| Intero 16 bit
33 + 34| Atmospheric pressure in Pa (*)

Internal sensor for CO 2 measurement compensation

| Intero 32 bit
35| Atmospheric pressure in hPa (x10)

Internal sensor for CO 2 measurement compensation

| Intero 16 bit
37| Power supply voltage in Volt (x10).| 16-bit Integer
38| Internal board temperature (x10).| 16-bit Integer
40| Instrument firmware revision. The most significant byte in- dicates the major revision; the less significant byte indi- cates the minor revision.| 16-bit Integer
41| Number of MODBUS communication error.| 16-bit Integer

(*) The measure is a 32-bit integer value. Two consecutive registers (33 and 34) must be accessed to read the value. The register with lower address contains the least significant bits.

Coils:

Bit
1| Enable configuration change:

0=no (default), 1=yes.

The changes to Coils and Holding Registers will be accept- ed only if this register is set to 1.

| Bit
2| Sets waiting time after transmission with MODBUS-RTU pro- tocol:

0=immediate reception (default); 1=waiting 3.5 characters.

| Bit
3| Enable/disable the offset of the analog output 1:

0=offset disabled (0…20 mA or 0…10 V, default if the out- put is voltage);

1=offset enabled (4…20 mA or 2…10 V, default if the output is current).

| Bit
4| Sets the direct or inverse correspondence between analog output 1 and associated physical quantity:

0=4 mA/0 V Þ Min. quantity, 20 mA/10 V Þ Max. quantity (default);

1=20 mA/10 V Þ Min. quantity, 4 mA/0 V Þ Max. quantity.

| Bit
5| Enable/disable the offset of the analog output 2:

0=offset disabled (0…20 mA or 0…10 V, default if the out- put is voltage);

1=offset enabled (4…20 mA or 2…10 V, default if the output is current).

| Bit
6| Sets the direct or inverse correspondence between analog output 2 and associated physical quantity:

0=4 mA/0 V Þ Min. quantity, 20 mA/10 V Þ Max. quantity (default);

1=20 mA/10 V Þ Min. quantity, 4 mA/0 V Þ Max. quantity.

| Bit

Holding Registers:

1=2400;

2=4800;

3=9600;

4=19200 (default);

5=38400;

6=57600;

7=115200.

| 16-bit Integer
1| RS485 parity and stop bits: 0=8N1;

1=8N2;

2=8E1 (default); 3=8E2;

4=8O1;

5=8O2.

[N=no parity, E=even parity, O=odd parity]| 16-bit Integer
2| Instrument address for the MODBUS-RTU protocol (1…247, default=1).| 16-bit Integer
3| Association of a physical quantity to the analog output 1: 0=PM1.0;

1=PM2.5 (default); 2=PM10;

12=CO2 (only PMBsense-A).

The PM measurement is averaged according to what is set with CPS command or MODBUS holding register 19.

| 16-bit Integer
6 + 7| Setting of the minimum value of the measuring range of the physical quantity associated to the analog output 1. (*)

If the output is associated to PM, the value is expressed as a number of tenths (e.g. 5 = 0.5 µg/m3). If the output is asso- ciated to CO2, the value is expressed as a number of units (e.g. 200 = 200 ppm). The default value is 0.

| 32-bit Integer
8 + 9| Setting of the maximum value of the measuring range of the physical quantity associated to the analog output 1. (*)

If the output is associated to PM, the value is expressed as a number of tenths (e.g. 50 = 5.0 µg/m3). If the output is as- sociated to CO2, the value is expressed as a number of units (e.g. 800 = 800 ppm). The default value is 10000 (=1000.0

µg/m3 of PM).

| 32-bit Integer
10| Association of a physical quantity to the analog output 2: 0=PM1.0;

1=PM2.5;

2=PM10 (default);

12=CO2 (only PMBsense-A).

The PM measurement is averaged according to what is set with CPS command or MODBUS holding register 19.

| 16-bit Integer
Address| Description| Format
---|---|---
11 + 12| Setting of the minimum value of the measuring range of the physical quantity associated to the analog output 2. (*)

If the output is associated to PM, the value is expressed as a number of tenths (e.g. 5 = 0.5 µg/m3). If the output is asso- ciated to CO2, the value is expressed as a number of units (e.g. 200 = 200 ppm). The default value is 0.

| 32-bit Integer
13 + 14| Setting of the maximum value of the measuring range of the physical quantity associated to the analog output 2. (*)

If the output is associated to PM, the value is expressed as a number of tenths (e.g. 50 = 5.0 µg/m3). If the output is as- sociated to CO2, the value is expressed as a number of units (e.g. 800 = 800 ppm). The default value is 10000 (=1000.0

µg/m3 of PM).

| 32-bit Integer
15| Setting of the PM measurement mode: 0=continuous;

1=at cyclic intervals (default).

| 16-bit Integer
16| Setting of the cycle interval, in seconds, for the PM meas- urement mode at cyclic intervals.

The default value is 300 (=5 min).

| 16-bit Integer Unsigned
18| Setting of the sensor ON time, in seconds, for the PM measurement mode at cyclic intervals.

It must be greater than 70 s (warm-up time). The default value is 71.

| 16-bit Unsigned Integer
19| Setting of the type of PM measurement averaging for the an- alog outputs and the measurements sent by the transmitter in reply to P1, P5, S1 and S5 commands (proprietary proto- col) or when reading MODBUS Input Registers 0…5: 0=average over a 10 seconds interval, updated every sec-

ond;

1=average over a 60 seconds interval, updated every 10 seconds (default);

2=average over a 15 minutes interval, updated every mi- nute.

| 16-bit Integer
20| Setting of the type of CO2 calibration to be used: 0=user;

1=factory (default).

| 16-bit Integer

For 32-bit values, two consecutive registers must be accessed (e.g. 6 and 7 for the setting of the minimum value of the measuring range of the physical quantity associated to the analog output 1). The register with lower address contains the least significant bits.

Maintenance

Periodically check the cleanliness of the air inlet and outlet grids. Do not use aggressive cleaning agents or incompatible with the materials indicated in the technical specifications. For cleaning, use a soft dry cloth or slightly dampened with clean water.

Safety instructions

The instrument proper operation and operating safety can be ensured only in the cli-matic conditions specified in this manual and if all standard safety measures as well as the specific measures described in this manual are followed.

Do not use the instruments in places where there are:

• Corrosive or flammable gases.
• Direct vibrations or shocks to the instrument.
• High-intensity electromagnetic fields, static electricity.

User obligations

The instrument operator shall follow the directives and regulations below that refer to the treatment of dangerous materials:

• EU directives on workplace safety.
• National law regulations on workplace safety.
• Accident prevention regulations.

Accessories ordering codes

CPM12-8PM.x Cable with 8-pole M12 connector on one end, open wires on the other end. Length 5 m (CPM12-8PM.5) or 10 m (CPM12-8PM.10).

RS51K Kit for connecting the transmitter RS485 output to a PC. It includes the SWD10 power supply and the RS485/USB adapter with:

• screw terminals for the connection to the CPM12-8PM.x cable (not included);
• USB connector for the connection to the PC;
• jack connector for connecting the SWD10 power supply

WARRANTY

The manufacturer is required to respond to the “factory warranty” only in those cases provided by Legislative Decree 6 September 2005 – n. 206. Each instrument is sold after rigorous inspections; if any manufacturing defect is found, it is necessary to contact the distributor where the instrument was purchased from. During the warranty period (24 months from the date of invoice) any manufacturing defects found will be repaired free of charge. Misuse, wear, neglect, lack or inefficient maintenance as well as theft and damage during transport are excluded. Warranty does not apply if changes, tampering or unauthorized repairs are made on the product. Solutions, probes, electrodes and microphones are not guaranteed as improper use, even for a few minutes, may cause irreparable damages. The manufacturer repairs the products that show defects of construction in accordance with the terms and conditions of the warranty included in the manual of the product. For any dispute, the competent court is the Court of Padua. The Italian law and the “Convention on Contracts for the International Sales of Goods” apply.

TECHNICAL INFORMATION

The quality level of our instruments is the result of continuous product development. This may lead to differences between the information reported in the manual and the instrument you have purchased. We reserve the right to change technical specifications and dimensions to fit the product requirements without prior notice.

DISPOSAL INFORMATION

Electrical and electronic equipment marked with specific in compliance with the 2012/19/EU Directive must be disposed of separately from household waste. European users can hand them over to the dealer or to the manufacturer when purchasing a new electrical and electronic equipment, or to a WEEE collection point designated by local authorities. Illegal disposal is punished by law. Disposing of electrical and electronic equipment separately from normal waste helps to preserve natural resources and allows materials to be recycled in an environmentally friendly way without risks to human health.

• senseca.com

• Senseca Italy S.r.l.

• Via Marconi, 5

• 35030 Selvazzano Dentro (PD)

• ITALY

• info@senseca.com

References

• Mess- und Regeltechnik | Senseca Germany GmbH

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