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Dew Point Sensors 

 Mini 

User Manual v1.1 

 

www.compressedairalliance.com  

Notices 

Please read this manual in full and 
carefully observe the notes and 
instructions before and during 
installation, operation and 
maintenance. The manufacturer cannot 
be held liable for any damage which 
occurs as a result of noncompliance 
with this manual. 

Do not tamper with device.

 

Should 

the device be tampered with in any 
manner other than a procedure which 
is described and specified in this 
manual, the warranty is cancelled and 
the manufacturer is exempt from 
liability. 

The product is designed exclusively 
for the described application. 

Use of 

this product in conditions not specified 
in this manual or, contrary to the 
instructions provided by the 
manufacturer, is considered improper 
handling of the product and will void 
your warranty. The manufacturer will 
not be held liable for any damages 
resulting from improper use of the 
product.

 

This manual should be read carefully by  
relevant personnel and the end user

This manual should be kept with the 
product and be made available as 
needed. 

Once you install or use the 

product, you accept that you have 
read, understood and complied with 
this manual

.  

Compressed Air Alliance endeavours to 
make the content of this manual 
correct, but is not responsible for 
omissions or errors and the 
consequences caused. In case of any 
doubts or questions regarding this 
manual or the product, please contact 
Compressed Air Alliance. 

Warnings 

Ignoring the warnings can lead to 
serious injury and/or cause damage!

 

When handling, operating or carrying 
out maintenance on this product, 
personnel must employ safe working 
practices and observe all local health & 
safety requirements and regulations.  

Improper operation or maintenance of 
this product could be dangerous and 
result in an accident causing damage to 
machinery or injury or death.  

The manufacturer cannot anticipate 
every possible circumstance which may 
represent a potential hazard. The 
warnings in this manual cover the most 
common potential hazards and are 
therefore not all-inclusive. If the user 
employs an operating procedure, an 
item of equipment or a method of 
working which is not specifically 
recommended by the manufacturer 
they must ensure that the product will 
not be damaged or made unsafe and 
that there is no risk to persons or 
property. 

NEVER CHANGE ORIGINAL 
COMPONENTS WITH ALTERNATIVES. 

Summary of Contents for DEM

Page 1: ...www compressedairalliance com 1 User Manual Dew Point Sensor Mini Series Model DEM ...

Page 2: ...Contents Notices 3 Warnings 3 About Dew Point Sensors 5 Specifications Mini Series 6 Dew Point Sensor Pack 8 Installation Overview 9 Installation Mechanical 10 Installation Electrical 15 Commuication Settings 17 Warranty 18 Calibration 18 Trouble Shooting 19 Commissioning Report 20 ...

Page 3: ...nstall or use the product you accept that you have read understood and complied with this manual Compressed Air Alliance endeavours to make the content of this manual correct but is not responsible for omissions or errors and the consequences caused In case of any doubts or questions regarding this manual or the product please contact Compressed Air Alliance Warnings Ignoring the warnings can lead...

Page 4: ...cted from any power supply during maintenance work Any electrical work on the system is only allowed by authorised qualified personal Storage and transportation Make sure that the transportation temperature of the sensor is between 10 C to 60 C 14 F to 140 F Please make sure that the storage temperature of the sensor is between 10 C to 50 C 14 F to 122 F and the humidity is 90 no condensation Avoi...

Page 5: ...component of your system and therefore should be monitored continuously Indicators on refrigerant dryers don t measure dew point The indicator on your refrigerant dryer is exactly that an indicator it is not measuring the dew point entering your plant It is only measuring the temperature of the refrigerant gas Any number of issues before and after your dryer can lead to the dew point deteriorating...

Page 6: ...nsor is affected by on site conditions Contaminants such as oil high humidity or other impurities can affect the calibration and accuracy of the sensor Minimum gas flow 1 L min Measurement Ranges Dew Point Measurement 60 C to 60 C 76 F to 140 F Gas Relative Humidity 0 to 95 RH Pressure Measurement 0 to 40 bar Gas Temperature Measurement 40 C to 100 C 40 F to 212 F Outputs Output Analogue 4 to 20mA...

Page 7: ... Other Information Inbuilt Display No Measurement Chamber 1 2 Quick coupling Nitto type with Adjustable Bleed Screw Ambient Temperature 30 C to 70 C 22 F to 158 F Dimensions 107 mm L x 28 mm W 4 2 L x 1 1 W Casing Stainless Steel or Aluminium IP Rating IP65 Installation Type Permanent or temporary installation Calibration Frequency Every 2 years provided the sensor is not exposed to relative humid...

Page 8: ...sor Pack Each dew point sensor comes with Dew Point sensor in either Aluminium or Stainless Steel Casing Measurement Chamber o Standard option 1 2 Quick coupling Nitto type with Adjustable Silencer o Talk to you local dealer about other options Connector 5 meter cable with M8 connector ...

Page 9: ...stall the sensor upside down horizontally at an angle or in wet gas Step 2 Install connection point in pipe eg a ball valve nozzle or nipple Step 3 Attach Dew Point Sensor to connection point Step 4 Set the gas bleed Step 5 Wire the sensor see Installation Electrical Step 6 Check the sensor settings Step 7 optional Connect the sensor to your SCADA or energy management system Step 8 Fill out the Co...

Page 10: ...g parameters can lead to malfunctions and may damage the product or system Do not use this product in explosive areas Always use a spanner wrench to install the product Only use pressure rated materials and parts when installing and maintaining the product Do not disassemble the product Please observe local and national regulations before during installation and operation The product must be insta...

Page 11: ...sensor If installing the sensor outdoor protection from sun and rain is necessary Correct Installation Incorrect Installation Do NOT install the sensor before a dryer or in gases with a re lative humidity above 80 Do NOT install the sensor upside down horizontally or at an angle as shown below Do NOT let condensate reach the tip of the sensor Dry Side Wet Side Dryer Compressor Filter Filter Dry Si...

Page 12: ...f a ball valve is optional You do not need to use a valve to install the sensor However using a valve will make removing the sensor easier eg when you need to remove the sensor for calibration If installing a ball valve you can use a hot tap drill and clamp to create a connection point on pressurized or unpressurised pipes See the Compressed Air Alliance website for information on hot tap drills a...

Page 13: ...rement chamber into the connection point and tighten with a spanner eg valve nipple or nozzle o Compressed Air Alliance recommends that our dew point sensors are installed via a measurement chamber o A reducing bush may be needed if connecting the measurement chamber to a large ball valve or nipple o Fix measurement chamber firmly to prevent loosing or shaking o Use thread tap or sealant where req...

Page 14: ...ed screw to allow a small flow of gas to escape to the atmosphere Option 2 Zero Loss Chamber The zero loss chamber will prevent gas escaping to atmosphere and can improvie system efficiency Remove the bleed screw and fitting from measurement chamber Install a 1 4 to 6mm push fit into measurement chamber Connect a 6 mm tube between the measurement chamber and a second connection point downstream of...

Page 15: ...rectly Consider all local and national safety requirements and regulations for electrical installations The system must be disconnected from any power supply during installation and maintenance work Any electrical work on the system is only allowed by authorised and qualified personal 4 20mA Scaling The sensor has an analog output range of 4 to 20 mA which is a 3 wire active analog output The anal...

Page 16: ...ing force Otherwise it may damage the connection pins The data cable will be coloured coded as shown in the table below Its good practice to check the cable colours and make sure they match the chart below Connector Cable Colour Pin 1 RS845 Data A Brown Pin 2 RS845 Data B White Pin 3 4 20mA Output Blue Pin 4 12 30 vDC Black Pin 5 0 vDC Ground for Modbus Grey M8 Connector plug Sensor tip ...

Page 17: ...efault Modbus RTU RS485 Settings Address Baud Rate Frame Parity Stop Bit Response Time Response Delay Frame Spacing 1 9600 8 N 1 1 Sec 0 Milliseconds 7 Characters Modbus Registers Holding Register Address Data Type Byte Length Description Unit Read Write 1 0 FLOAT 4 Temperature ºC or ºF Read 3 2 FLOAT 4 Relative Humidity RH Read 5 4 FLOAT 4 Pressure Dew Point ºCtd or ºFtd Read Optional integrated ...

Page 18: ... caused by vibration damage during transportation excess heat or moisture The warranty is cancelled when one of the following situations occurs The user opens the measurement instrument without a direct request written in this manual Repairs or modifications are undertaken by third parties or unauthorised persons The serial number has been changed damaged or removed Other claims especially damage ...

Page 19: ...o Installation Mechanical section for more information The sensor should be installed vertically Typical mechanical installation errors include Installing sensor upside down or at an angle Installing sensor in wet air Gas is not reaching the sensor tip 3 Make sure the sensor is wired correctly Refer to Installation Electrical section for more information 4 Check Modbus Settings Refer to Communicat...

Page 20: ...ryer Type select one Refrigerant Desiccant Membrane Other Dew Point Sensor Reading Installation Step Task Yes NA No Comments Sign 1 Is the Dew Point Sensor installed correctly refer to Installation Mechanical 2 Is the Dew Point Sensor wired correctly refer to Installation Electrical 3 Dew Point sensor attached to pipe 4 Modbus and 4 20mA settings checked 5 Are the dryer and condensate drains worki...

Page 21: ...Point Sensors Mini User Manual v1 1 www compressedairalliance com 21 Compressed Air Alliance Pty Ltd Phone Australia 1300 558 526 E mail sales compressedairalliance com Website www compressedairalliance com ...

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