Compressed Air Alliance P Series User manual

www.compressedairalliance.com 1
User Manual
Dew Point Sensor -
P Series
Model: DEP

Dew Point Sensors –P Series User Manual v1
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Table of Contents
Notices...........................................................................................................................................3
Warnings .......................................................................................................................................3
About Dew Point Sensors............................................................................................................5
Specifications –P Series ..............................................................................................................6
Dew Point Sensor Pack................................................................................................................8
Installation Overview ...................................................................................................................9
Installation ..................................................................................................................................10
Using the Display........................................................................................................................15
Commuication Settings .............................................................................................................19
Warranty......................................................................................................................................20
Calibration...................................................................................................................................20
Trouble Shooting........................................................................................................................21
Commissioning Report ..............................................................................................................23

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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.

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Compressed Air
Safety
Any contact with quickly escaping air
or bursting parts of the compressed
air system can lead to serious injuries
or even death.
•Do not exceed the maximum
permitted pressure.
•Only use pressure rated
installation materials and parts.
•Avoid getting hit by escaping air
or bursting parts.
•The system must be pressure-
less during maintenance work.
Electrical Safety
Any contact with energised parts of
the product, may lead to an electrical
shock which can lead to serious
injuries or even death. The user shall
take all measures necessary to
protect against electrical shock.
Consider all regulations for electrical
installations.
The system must be disconnected
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. Avoid
direct UV and solar radiation
during storage.
Cleaning
If you need to clean the product it is
recommended to use a clean, dry
cloth. For stubborn marks, use
distilled water or isopropyl alcohol
only.
Please note: contamination on the
sensor tip will affect calibration and
accuracy of the sensor. Removal of
the contamination may not fix the
issue.
Disposal
Electronic devices are recyclable
material and do not belong in the
household waste. The product,
accessories and its packing material
must be disposed according to local
statutory requirements.

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About Dew Point Sensors
Dew Point Sensors are the simplest way
to monitor dryer performance and
detect moisture issues before they can
cause a problem.
Moisture in the gas systems can clog
pipes, break machinery, cause
contamination (eg rust, mildew, bacteria)
or cause freezing.
Compressed Air Alliance’s dew point
sensors are designed for measuring
pressure dew point, gas temperature,
relative humidity and pressure (optional)
in manufacturing, industrial and base
building environments.
Dew point sensors are cheap, easy to
install and have low maintenance
requirements.
Benefits of monitoring dew point
•Improve system reliability
•Reduce product contamination risks
•Reduce system maintenance
•Reduce operating and energy costs
•Reduce the risk of rust and
corrosion build up
•Improve dryer reliability
•Improve filter life and performance
•Reduce the risk of bacteria, fungus
and yeast build up
•Alerts you to changes in dryer
performance before moisture
appears in your plant
•Easy to install and low maintenance
•Suitable for temporary or
permanent installations.
Dew Point Sensor Dimensions (mm)
346 mm
(13.6”)
219.5 mm
(8.6”)
103 mm
(4.1”)

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Specifications –P Series
DEPx1xxxx
DEPx2xxxx
DEPx3xxxx
Technology
Polymer
Aluminum-Oxide
Aluminum-Oxide
System
Compressed air and gas systems up to 4 Mpa (600psi)
Dryer Type
Refrigerant, Drum
or Membrane
dryers
Refrigerant,
Desiccant, Drum or
Membrane dryers
Desiccant dryer
Gases
Air, Argon, Carbon Dioxide, Carbon Monoxide, Helium,
Hydrogen, Nitrogen, Oxygen
Accuracy
Dew Point
+60 to -60°C: ±2°C
-60 to -100°C: ±3°C
Temperature: ±0.5°C
Pressure: ±0.3% FS (at 23°C)
Pressure changes with temperature: ±0.01 bar / °C
The accuracy of the sensor 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
-80 to +20 °C
-112 to +68°F
-100°C to +20°C
-148°F to +68°F
Pressure
Measurement
0 to 17 bar (247 psi)
Gas Temperature
-40°C to +100°C | -40°F to +212°F
Outputs
Output
Modbus RS485
Power
Power Supply
Standard wall socket, 220 vAC, 10W

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DEPx1xxxx
DEPx2xxxx
DEPx3xxxx
Electrical
Connection
M12 PG Plug
EMC
Meets IEC 61326-1
Other Information
Process Connection
6 mm stainless steel quick connector
Display
17.8cm (7.0”) LCD colour touch screen
Data Logging
Yes
Data recording
Max 16G USB Flash Disk
Operating
Temperature
0°C to +50°C | +32°F to +122°F
Gas Relative
Humidity
0 to 95% RH
Dimensions
346 mm L x 219.5 mm W X 103 mm D
13.6” L x 8.6” W x 4.1” D
Casing
Plastic
Installation Type
Permanent or temporary installation
Calibration
Frequency
Every 2 years provided the sensor is not exposed to relative
humidity above 85%

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Dew Point Sensor Pack
Each dew point sensor comes with:
✓Portable dew point sensor
✓Power cord with USA, EURO, UK or Australia plug
✓6 mm PTFE tube with nitto fitting. Tube length: 1.5 meters (5 foot) long
oA longer tube can be provided upon request, but it will slow the sensor’s
response time.
Portable dew point
sensor
6 mm PTFE tube
with nitto fitting
Power cord

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Installation Overview
Step 1 –Connect Portable Dew Point Sensor to power and gas
•The portable dew point sensor must be connected to dry side of system
(ie after a dryer or in gases with relative humidity below 80%).
•The portable dew point sensor must be placed on stable surface
•If necessary, create a connection point on the gas pipe
Step 2 –Turn on Portable Dew Point Sensor
Step 3 –Open Bleed Valve
Step 4 –Optional –insert USB to record data and / or insert Modbus connection
7” touch screen
Air inlet
USB Port
Bleed Valve
Silencer
Modbus output
connection
Power Input
Power Switch
Power Indicator Light
Lid
(with storage slot)

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Installation
WARNING! Incorrect installation can damage the dew point sensor or cause
it to work incorrectly.
Notes
•Before installing the product, make sure it is rated for your system (refer
to the “Specifications” section).
oUse of the product outside specified ranges or operating parameters can
lead to malfunctions and may damage the product or system.
•The portable dew point sensor must be disconnected from any power supply
during installation and maintenance work.
•Do not use this product in explosive areas.
•Do not use this product outdoors. The portable dew point meter is only suitable
for indoor applications.
•Always use the correct tools to install the product.
•Only use pressure rated materials and parts when installing and maintaining
the product.
•Do not disassemble the product.
•Do not tamper with the wiring inside the dew point monitor. Modifying the
wiring will void your warranty and could damage the sensor.
•Please observe local and national regulations before/during installation and
operation.
•The product must be installed properly and calibrated regularly, otherwise it
may lead to inaccurate measurement values.
•Response times: The dew point sensor may take up to 24 hours to stablise.
Once stablised, response times will be a few seconds or less.

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Step 1 –Connect Portable Dew Point Sensor
The portable dew point sensor must be connected to dry gas (gas humidity
should be less than 80% relative humidity (RH)).
Make sure the portable dew point is secured to a stable surface.
•Insert one end of PTFE tube into Air Inlet on the Portable Dew Point Sensor
oIf the ends of the PTFE tube are damaged, cut them off. Damaged tube may
allow gas to escape which can affect the sensors readings
•Insert other end of PTFE tube into the gas connection point (on the gas pipe)
oIf necessary, remove the nitto fitting from the PTFE tube
oIf the ends of the PTFE tube are damaged, cut them off. Damaged tube may
allow gas to escape which can affect the sensors readings
oIf necessary, create a connection point on the pipe (eg nitto connection or 6
mm push fitting). If you are unsure on how to create a connection point,
contact Compressed Air Alliance
•Insert power lead into the side of the Portable Dew Point Sensor
Insert PTFE tube
into Air Inlet
Insert Power lead
Connect PTFE tube to
gas connection point

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Step 2 –Power On Portable Dew Point Sensor
Consider all local and national safety requirements and regulations for
electrical installations.
•Connect power lead to a standard wall socket, (110-240vAC) and turn on
power
oHigh voltages will damage the product.
•On the Portable Dew Point Sensor, press the power button. When the power is
on:
oThe power button will glow blue
oThe power indicator light will turn green
oThe screen will light up
Press Power button
(button will glow blue
when power is on)
Power indicator light will
turn green when power is on
Power lead connected to
wall socket (110-240 vAC)

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Step 3 –Open Bleed Valve
•Turn the Bleed Valve slightly to allow some gas to escape. This will ensure gas is
reaching the dew point sensor
oIf Bleed valve is closed, no gas will flow past the dew point sensor which can
cause incorrect readings
oIf the Bleed Valve is open too far, the pressure in the portable dew point
sensor will be lower than the system pressure in the gas pipes
oWhen the Bleed Valve is open, you will hear gas hissing out of the Silencer
Gas will escape
from the Silencer
Open Bleed Valve

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Step 4 –Optional –USB and Modbus connection
To record data or take screen shots, you will need to insert a USB card into the
Portable Dew Point Sensor.
You can also export data via the Modbus connector (ODU)
Modbus Connector
(ODU)
USB Slot

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Using the Display
The touch screen display has five (5) main menus (along the bottom of the screen) –
‘Graphic’, ‘Value’, ‘Sensor Setting’, ‘Menu’ and ‘Camera’.
•Graphic displays a graph of the data
•Value (or home screen) shows you the current dew point, temperature and
relative humidity readings.
oIf you have he Portable Dew Point Sensor with integrated Pressure sensor,
you will also see the pressure readings.
•Sensor Setting allows you to view the modbus settings of the dew point
sensor.
•Menu allows you to change the brightness of the screen, set the date and time,
view the device information (serial number, hardware version and software
version) and update the modbus settings of the display to match the modbus
settings of the dew point sensor.
•Camera icon takes a screen shot.

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Graphic Screen
View the dew point readings on a graph.
Move back or froward in time
Start or stop the graph
Click on the side bar to change the
range. A pop up box will appear
• Click on the “High” valve to
change the upper limit
• Click on the “Low” valve to
change the lower limit
Click on the side bar to
turn the graph on or off
Press the Camera icon to take a
screen shot
(Note: USB must be inserted
into Portable Dew Point Sensor)

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Value Screen
The Value screen (or home screen) shows you the current dew point, temperature
and relative humidity values.
Date and Time
Menu options
Measurement Values
“Gauge Pressure” will only appear if you
have the Portable Dew Point Sensor with
Integrated Pressure Sensor
Press the Camera icon to take a
screen shot
(Note: USB must be inserted
into Portable Dew Point Sensor)

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Dew Point Sensors –P Series User Manual v1
Sensor Setting
Edit the modbus settings for the dew
point sensor.
Menu Screen
The menu screen has four options:
•RS485 Host allows you to change
Modbus settings for the touch
screen display
•RS485 Slave allows you to change
Modbus settings for the Modbus
ODU connector
•System Setting which allows to
change:
obrightness of the screen,
odate / time
oview device information.
•Logging lets you start / stop
logging
oYou will need to insert a
USB into the Portable Dew
Point Sensor to record data
To return to the previous screen, click
on the back arrow ( <) on the top left
of the screen.
Which Modbus screen do I
use?
The dew point monitor has three
screens with Modbus information.
Sensor Setting > RS485 =
Modbus setting of the dew point
sensor
Menu > RS485 Host = Modbus
setting of the touch screen display
Menu > RS485 Slave = Modbus
setting of the Modbus ODU
Connector

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Commuication Settings
Default Modbus Settings
All dew point sensors use the following default Modbus settings. Settings can be
changed to suit system requirements using the Service Software (contact
Compressed Air Alliance for more information).
Default 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 pressure sensor
21
20
FLOAT
4
Absolute
Pressure
KPa,
Mpa,
Bar, PSI
Read
42
41
FLOAT
4
Gauge
Pressure
KPa,
Mpa,
Bar, PSI
Read

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Dew Point Sensors –P Series User Manual v1
Warranty
Compressed Air Alliance provides a 12-
month warranty for all sensors. The
warranty covers materials and
workmanship under the stated
operating conditions from the date of
delivery. Please report any findings
immediately and within the warranty
time.
If faults occur during the warranty
period Compressed Air Alliance will
repair or replace the defective unit,
without charge for repair labour and
material costs but there is a charge for
other services such as labour to remove
or reinstall the instrument, transport
and packing. Warranty repairs do not
extend the period of warranty.
The following damage is excluded from
this warranty:
•Improper use and non-
adherence to the user manual.
•Use of unsuitable accessories.
•External influences (e.g. damage
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
occurring on the outside of the
instrument (eg dents, marks), are not
included unless responsibility is
legally binding.
Calibration
The sensor is calibrated before delivery.
The calibration date is printed on the
certificate which is shipped with the
sensor.
Dew Point Sensors require calibration
to remain accurate. The frequency of
calibration depends greatly on the level
of contamination within your system.
We recommend you calibrate the
sensor every 2 years (provided the
sensor is not exposed to relative
humidity above 85%). Calibration is
excluded from the product warranty.
For more information, contact
Compressed Air Alliance.