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C7355A ROOM IAQ MONITOR

31-00434—01

10

Measurements Adjustment via MODBUS:

1.

Temperature

2.

Humidity

3.

CO

2

4.

TVOC coefficient 

5.

Particle coefficient

Use MODBUS PC software to operate according to the following table:

Table 4. Measurement Adjustment via MODBUS.

Temperature 

value adjustment

RH value 

adjustment

CO

2

 value 

adjustment

TVOC coefficient 

adjustment

Particle total 

environmental 

coefficient 

adjustment

Function code

3(Read)/16(Write)

3(Read)/16(Write)

3(Read)/16(Write)

3(Read)/16(Write)

3(Read)/16(Write)

Starting point 
(Base 0)

4 6 14 

12 

1224

Data 

length 

2 2 1 2 2

Data type

32 Bit Float 
Big-endian

32 Bit Float 
Big-endian

INT16

32 Bit Float 
Big-endian

32 Bit Float 
Big-endian

Setting value

Standard reading - 
C7355A local 
temperature 
measured value

Standard reading - 
C7355A local 
humidity measured 
value

Standard reading - 
C7355A local CO

2

 

measured value

Standard 
reading/TVOC 
local measured 
value

Standard reading X 
C7355A local 
PM2.5 average 
measured value

Setting range

-9.00–+9.00 °F(--
5.00–+5.00 °C)

-10.00–
+10.00%RH

-300–+300 ppm

0.001–65.000 
times

0.001–10.000 
times

Содержание C7355A1050

Страница 1: ...o ensure reliability The monitor has a three color light ring to indicate different levels of indoor air quality The simple structure and installation makes wall mounting and ceiling mounting both easy and convenient Intended audience and assumed knowledge This document provides information about installing and commissioning the IAQ monitor It is assumed that the user is trained and familiar with ...

Страница 2: ... non condensing Overall Dimensions 5 12 in 5 12 in 1 77 in 130 mm 130 mm 45 mm Net weight 0 66 lb 300 g Certification Standard CE FCC IAQ MONITOR AT A GLANCE Light Ring Indicator Overview The image below illustrates the typical face shell of this IAQ monitor There is a circle light ring indicator in the center of the housing This light is used to show the measured air quality Fig 2 Monitor light r...

Страница 3: ...uct in a place where water may splash onto it Do not operate the detector with a hard sharp or pointed object such as a fingernail or pen 1 To separate the backplane from the detector rotate the backplane clockwise according to the direction of the arrow See Fig 3 and 4 Fig 3 Fig 4 2 Use a screwdriver to punch out the appropriate opening See Fig 5 Fig 5 3 Pull wires through the opened hole See Fig...

Страница 4: ...ng Instructions After installing the monitor and powering it up for initial use or re use the device should be continuously powered for more than 48 hours to ensure stable output of all measured values Complete these steps to configure the detector and connect it to the BMS IMPORTANT Make sure the RS 485 wiring is done before pow ering up Modbus Register Table Mode RTU MSB First Baud Rate 1 4800 2...

Страница 5: ...real time measurement 4 R 2 Float Big Endian 0 0 5 000 ppm 22 1010 TVOC real time measurement 4 R 2 Float Big Endian 3 0 4000 mg m3 24 1100 PM2 5 24 hour moving average measurement 4 R 2 Float Big Endian 1 0 1000 0 μg m3 26 1102 PM10 24 hour moving average measurement 4 R 2 Float Big Endian 1 0 1000 0 μg m3 32 1108 CO2 24 hour moving average measurement 4 R 2 Float Big Endian 0 0 5 000 ppm 34 1110...

Страница 6: ...ion index level Calculated based on 24 hour moving average measurement 4 R 1 INT16 1 6 1351 PM10 Pollution index level Calculated based on 24 hour moving average measurement 4 R 1 INT16 1 6 1352 CO2 Pollution index level Calculated based on 24 hour moving average measurement 4 R 1 INT16 1 6 1353 TVOC Pollution index level Calculated based on 24 hour moving average measurement 4 R 1 INT16 1 6 78 3 ...

Страница 7: ...ta Range Data Description Default 50 1175 PM2 5 hourly average measurement x10 4 R 1 UINT16 1 0 10000 corresponding to 0 1000 0 μg m3 51 1176 PM10 hourly average measurement x10 4 R 1 UINT16 1 0 10000 corresponding to 0 1000 0 μg m3 54 1179 CO2 hourly average measurement x1 4 R 1 UINT16 0 0 5000 corresponding to 0 5 000 ppm 55 1180 TVOC hourly average measurement x1000 4 R 1 UINT16 3 0 3575 corres...

Страница 8: ... on the concentration See Table 3 for concentration level DIP switches control the Indicator Lights OFF Three color Indicator Lights and Green Indicator Lights ON Please see Fig 14 and Table 3 62 1200 PM2 5 24 hour moving average measurement x10 4 R 1 UINT16 1 0 10000 corresponding to 0 1000 0 μg m3 63 1201 PM10 24 hour moving average measurement x10 4 R 1 UINT16 1 0 10000 corresponding to 0 1000 ...

Страница 9: ...ity Temperature and humidity calibration standard commercial or industrial temperature and humidity calibration standard After the temperature and humidity calibration stan dard and C7355A that needs to be corrected are powered on continuously and synchronously for more than 60 minutes start to record the value of temperature and humidity for 10 minutes use the synchronous average value within 10 ...

Страница 10: ...ad 16 Write 3 Read 16 Write 3 Read 16 Write 3 Read 16 Write 3 Read 16 Write Starting point Base 0 4 6 14 12 1224 Data length 2 2 1 2 2 Data type 32 Bit Float Big endian 32 Bit Float Big endian INT16 32 Bit Float Big endian 32 Bit Float Big endian Setting value Standard reading C7355A local temperature measured value Standard reading C7355A local humiditymeasured value Standard reading C7355A local...

Страница 11: ...return CO2 values to normal Self calibration conditions The CO2 concentration is around 400 ppm for at least 4 hours in every 24 periods The self calibration environment should last for one week TVOC s deviation is too large high or low TVOC in the environment needs to be stabilized for at least 48 hours after the sensor is powered on TVOC data deviation may be a little large within a short time a...

Страница 12: ...lding Technologies In the U S Honeywell 715 Peachtree Street NE Atlanta GA 30308 customer honeywell com buildingcontrols honeywell com U S Registered Trademark 2020 Honeywell International Inc 31 00434 01 M S 10 20 Printed in United States ...

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