E+E Elektronik EE371 User manual

BA_EE371_e // V2.0 // technical data are subject to change
Manual
EE371
Dew Point Transmitter / Switch
down to -60 °C Td

E+E Elektronik Ges.m.b.H. doesn't accept warranty and liability claims neither upon this publication nor in case of
improper treatment of the described products.
The document may contain technical inaccuracies and typographical errors. The content will be revised on a
regular basis. These changes will be implemented in later versions. The described products can be improved and
changed at any time without prior notice.
© Copyright E+E Elektronik Ges.m.b.H.
All rights reserved.
EMC note USA (FCC):
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15
of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when
the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at his own expense.
EMC note Canada (ICES-003):
CAN ICES-3 (A) / NMB-3 (A)

3
Manual EE371 Dew point transmitter
INHALT
1 General .................................................................................................................................................4
1.1 Explanation of symbols .................................................................................................................................4
1.2 Safety Instructions.........................................................................................................................................4
1.2.1 General safety instructions ..................................................................................................................................4
1.2.2 Mounting, start-up and operation .........................................................................................................................4
1.2.3 Intended Use........................................................................................................................................................5
1.3 Environmental aspects ..................................................................................................................................5
2 Product description ............................................................................................................................6
2.1 General..........................................................................................................................................................6
2.2 Dimensions in mm (inch)...............................................................................................................................6
2.3 Auto-calibration .............................................................................................................................................6
2.4 Output scale; Output signal limitation ...........................................................................................................7
3 Installation ...........................................................................................................................................8
3.1 Installation location........................................................................................................................................8
3.2 Direct mounting into the process...................................................................................................................8
3.3 Mounting with a sampling cell .......................................................................................................................9
3.3.1 Basic sampling cell...............................................................................................................................................9
3.3.2 Sampling cell with quick connector ......................................................................................................................9
4 Electrical Connection........................................................................................................................10
5 Operating components ..................................................................................................................... 11
5.1 Electronics board.........................................................................................................................................11
5.2 Status LEDs ................................................................................................................................................11
5.3 Display Module (Option)..............................................................................................................................12
6 Setup ..................................................................................................................................................12
7 Calibration / Adjustment ...................................................................................................................12
7.1 Denitions....................................................................................................................................................12
7.2 Customer adjustment - Dew Point...............................................................................................................12
8 Maintenance.......................................................................................................................................13
8.1 Sensorcleaningandlterreplacement .......................................................................................................13
8.2 Self-diagnostic and error messages............................................................................................................13
9 Accessories .......................................................................................................................................14
9.1 Scope of Supply ..........................................................................................................................................14
10 Technical Data ...................................................................................................................................14

4Manual EE371 Dew point transmitter
1 General
This operation manual is part of the scope of supply and serves for ensuring proper handling and
optimal functioning of the device.
The operation manual shall be read before commissioning the equipment and it shall be provided to all
staff involved in transport, installation, operation, maintenance and repair.
The operation manual may not be used for the purposes of competition without the written consent of
E+E Elektronik® and may not be forwarded to third parties. Copies may be made for internal purposes.
All information, technical data and diagrams included in these instructions are based on the information
available at the time of writing.
1.1 Explanation of symbols
This symbol indicates safety information.
It is essential that all safety information is strictly observed. Failure to comply with this information can
lead to personal injuries or damage to property. E+E Elektronik® assumes no liability if this happens.
This symbol indicates instructions.
The instructions shall be observed in order to reach optimal performance of the device.
1.2 Safety Instructions
1.2.1 General safety instructions
• Avoid any unnecessary mechanical stress and inappropriate use.
• Whenreplacingtheltercapmakesurenottotouchthesensingelements.
• Forsensorcleaningandltercapreplacementpleasesee“Cleaninginstructions”atwww.epluse.com.
• Installation, electrical connection, maintenance and commissioning shall be performed by
qualiedpersonnelonly.
1.2.2 Mounting, start-up and operation
The device has been produced under state of the art manufacturing conditions, has been thoroughly
testedandhasleftthefactoryfulllingallsafetycriteria.
The manufacturer has taken all precautions to ensure safe operation of the device. The user must
ensure that the device is set up and installed in a manner that does not have a negative effect on its
safe use.
The user is responsible for observing all applicable safety guidelines, local and international, with
respect to safe installation and operation on the device. This operating manual contains information and
warnings that must be observed by the user in order to ensure safe operation.
• Mounting,start-up,operationandmaintenanceofthedevicemaybeperformedbyqualiedstaffonly.
Such staff must be authorized by the plant operator to carry out the mentioned
activities.
• Thequaliedstaffmusthavereadandunderstoodthisoperatingmanualandmustfollowthe
instructions contained within.
• All process and electrical connections shall be thoroughly checked by authorized staff before putting
the system into operation.
• Do not install or start start-up a device supposed to be faulty. Make sure that such devices are not
accidentally used by marking them clearly as faulty.
• Afaultydevicemayonlybeinvestigatedandpossiblyrepairedbyqualied,trainedandauthorized
staff.Ifthefaultcannotbexed,thedeviceshallberemovedfromthesystem.
• Service operations other than described in this operating manual may only be performed by the
manufacturer.

5
Manual EE371 Dew point transmitter
1.2.3 Intended Use
The EE371 is intended for the measurement of dew point temperature (Td), frost point temperature (Tf)
andvolumeconcentration(Wv)inair(compressedair)andothernon-corrosiveandnon-ammable
gasses, depending on the model up to 20 bar (290 psi) respectively 100 bar (1450 psi). The use of the
EE371 other than described in this manual is not allowed.
The manufacturer cannot be held responsible for damages as a result of incorrect handling, installation
and maintenance of the device.
Unauthorizedmodicationsoftheproductleadtolossofallwarrantyclaims.Thedevicemayonlybe
powered with separated extra-low voltage (SELV).
Disclaimer
The manufacturer or his authorized agent can be only be held liable in case of willful or gross negli-
gence. In any case, the scope of liability is limited to the corresponding amount of the order issued to
the manufacturer. The manufacturer assumes no liability for damages incurred due to failure to comply
with the applicable regulations, operating instructions or the operating conditions. Consequential dam-
ages are excluded from the liability.
1.3 Environmental aspects
Products from E+E Elektronik® are developed and manufactured observing of all relevant requirements
with respect to environment protection. Please observe local regulations for the device disposal.
For disposal, the individual components of the device must be separated according to local recycling
regulations. The electronics shall be disposed of correctly as electronics waste.

6Manual EE371 Dew point transmitter
2 Product description
2.1 General
Modell T:
The EE371 transmitter features two freely selectable and scalable outputs for Td, Tf or Wv.
Modell S:
The EE371 switch has two relay outputs for control and alarm purposes. The status of the two relays
(conguredforinstanceforearlywarningandmainalarm)isindicatedbyLEDs.
The analogue outputs as well as the Td/Tf switch threshold and hysteresis can be set with the EE-PCS
ProductCongurationSoftware,freedownloadfromwww.epluse.com/congurator.
2.2 Dimensions in mm (inch)
48
1.9“
100
3.9“
28
1.1“
54
2.1“
32
1.3“
75
3“
40(1.6“)
24(1“)
Ø12(0.5“)
spanner width:
27 or 24
G1/2”ISOor
1/2”NPT
2.3 Auto-calibration
A special auto-calibration procedure leads to high-precision measurement even in the low Td range.
The auto-calibration is performed every 30 minutes and takes approx. 3 minutes.
During the auto-calibration, the analogue outputs are frozen at the last measured value.

7
Manual EE371 Dew point transmitter
2.4 Output scale; Output signal limitation
The Td analogue output can be scaled within the range -100...80 °C (-148...176 °F).
Forair(gas)temperatureTa≤20°C(≤68°F),theoutputislimitedatTd=-80°C(-112°F)
Forair(gas)temperatureTa>20°C(≤68°F),theoutputislimitedatTd=Ta-100°C(Ta-180°F)
Example (see also Fig.1):
Forair(gas)temperatureTa=30°C(86°F)theoutputislimitedatTd=30°C-100°C=-70°C(86°F–
180°F=-94°F).
60
40
20
0
-20
-40
-60
-80 010 20 30 40 50 60
-10
-20
-30
-40
Accuracy ≤ ±2 °C Td
Accuracynotspecied
Output signal
limitation
Air (gas) temperature Td [°C]
Dew point temperature -Td [°C]
Fig. 1 Dew point measurement range and specied accuracy
The maximum scaling of the analogue output is -100...80 °C (-148...176 °F) dew point.

8Manual EE371 Dew point transmitter
3 Installation
3.1 Installation location
Upon delivery the sensor is protected by a cap that keeps the dew point sensor dry. The cap should
only be removed immediately before installation into the application.
Fig. 2 Remove protection cap
For accurate measurement and short response time, the sensing head shall be immersed in the air
or gas to be monitored. The mounting of EE371 shall be tight; moisture ingress from the surroundings
falsify the measurement results.
Temperature gradients in the process do not affect the Td measurement. Pressure gradients and
variationshaveastrongimpactontheTdmeasurement.Forevaluatingtheseinuencesthe
E+E Humidity Calculator, free download from www.humidity-calculator-online.com or as free App for
iOS and Android.
3.2 Direct mounting into the process
For direct mounting (without a sampling cell) of the EE371 into the process, it is highly recommended
to install stop valves on both sides of the mounting location. This facilitates removing the transmitter for
maintenance and calibration.
Inserttheprobeintotheprocessandscrewitrstbyhand,checkthecorrectpositioningofthesealing
ring. Use an appropriate wrench to tighten with a torque of 30 Nm.
OK NOT OK
üû
Fig. 3 Direct mounting into the pipe
SealingringsmaynotbeusedwithaNPT1/2“thread.UseappropriatePTFEsealingtapeorsealant.

9
Manual EE371 Dew point transmitter
3.3 Mounting with a sampling cell
EE371 mounting with a sampling cell is recommended:
• in case of high process temperature
• for keeping the sensing head out of the main air (gas) stream
• for easy installing / removing the probe without process disruption.
Please note:
• Pressuregradientsbetweentheprocessandthesamplingchamberleadtosignicantmeasuring
errors.
• The mounting of EE371 with sampling cell shall be tight; moisture ingress from the surroundings
falsify the measurement results. Do not employ any hygroscopic materials for mounting EE371 or the
sampling cell.
• Keep the sampling line as short as possible.
• Theresponsetimeincreasesforair(gas)ow<1l/min(0.25gpm).
• Atoolowgasowcanresultinback-diffusionofhumidityfromtheenvironmentandconsequentlyto
false measurement.
3.3.1 Basic sampling cell
Pressure range: 0...64 bar (0...928 psi)
Order code: HA050103 (ISO) HA050105 (NPT)
1
2
3
ISO NPT
1G1/2“ 1/2“
2G1/4“ 1/4“
3G1/4“ 1/4“
Fig. 4 Basic sampling cell
3.3.2 Sampling cell with quick connector
The sampling cell features a quick-connector suitable for standard compressed air connections DN7.2.
It allows the cell to be installed and removed without process interruption.
Theair(gas)owalongthesensingheadofEE371canbeadjustedusingthebleedscrew.
Pressure range: 0...10 bar (0...145 psi)
Order code: HA050102
3
2
1
1G1/2“ISO
2 Bleed screw
3 Quick connector DN7.2
Fig. 5 Sampling cell with quick connector

10 Manual EE371 Dew point transmitter
4 Electrical Connection
The electrical connection is made via the 7-pin connector DIN VDE 0627 / IEC 61984. An mating con-
nector is included in scope of supply.
1
7
6
52
3
4
1 V+
2 GND
3 GND
4 OUT1
5 OUT2
6 NC
7 NC
V
mA
V
mA
10...30V DC
1
7
6
52
3
4
1 V+
2 GND
3 NC11
4 NC12
5 NC21
6 NC22
7 not connected
10...30V DC
1
7
6
52
3
4
1 V+
2 GND
3 GND
4 OUT1
5 OUT2
6 NC
7 NC
V
mA
V
mA
10...30V DC
1
7
6
52
3
4
1 V+
2 GND
3 NC11
4 NC12
5 NC21
6 NC22
7 not connected
10...30V DC
Analogue output Relay output
The switching thresholds are factory set:
NC
NC
11
11
NC
NC
12
12
NC
NC
21
21
NC
NC
22
22
switching off hysterese
switching on
[Td] switching point
ONOFF
2 °C
4 °F
-42°C (-44 °F) -40°C (-40 °F) EE371-Sxxx:
RELAIS 1:
Relais Status
NC
NC
11
11
NC
NC
12
12
NC
NC
21
21
NC
NC
22
22
switching off hysterese
switching on
[Td] switching point
ONOFF
2 °C
4 °F
-37°C (-35 °F) -35°C (-31 °F)EE371-Sxxx:
RELAIS 2:
Relais Status

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Manual EE371 Dew point transmitter
5 Operating components
5.1 Electronics board
5. Display
2. Status LEDs
3. Current-/ voltage output
1. Serial interface
4. Diagnostic LED
1. Serial interface:
ConnectorforserialinterfacecableHA010604orEE-PCAProductCongurationAdapterwith
HA011063. See data sheets EE371, Accessories and EE-PCA at www.epluse.com/ee371.
2. Status LEDs:
ProvideinformationonthestatusoftheEE371.Seechapter„“5.2StatusLEDs”.
3. Current-/ voltage output:
Jumpers for selecting the analogue output signal. The change from voltage to current or vice versa
shallbeperformedbothviahardware(jumpers)andsoftware(withtheEE-PCSProductConguration
Software).
I
U
I
U
I
U
I
U
for voltage signals:for current signals:
4. Diagnostic LED:
Errorindication.Seechapter„8.2Self-diagnosticanderrormessages“.
5. Display:
Connectors for the optional display module.
5.2 Status LEDs
Green
Yellow
Red
Green (Power LED):
ashing=EE371iscorrectlypowered
Yellow / Red :
The yellow and red LEDs are only enabled at model S
(switch output):
• yellow LED on continuously: relay 1 is activated
• red LED on continuously: relay 2 is activated
The yellow and red LEDs have no function at model T
(analogue output).

12 Manual EE371 Dew point transmitter
5.3 Display Module (Option)
1. Measurand: 2. Units:
SI US
Td dew point temperature °C °F
Tf frost point temperature °C °F
Wv volume concentration ppm ppm
3. Measured value:
EE371
Td -60...60 °C Td (-112...140 °F Td)
Tf -60...0 °C Tf *) (-112...32 °F Tf)
Wv 20...200 000 ppm
*) over 0 °C dew point will be displayed
1. Measurand
2. Units
3. Measured
value
6 Setup
TheEE371probeisreadytouseanddoesnotrequireanycongurationbytheuser.Thefactorysetup
of EE371 corresponds to the type number ordered.
The scaling of the analogue output and settings of the relay thresholds can be changed with the free
EE-PCSProductCongurationSoftware,freedownloadatwww.epluse.com/congurator
UseeithertheserialinterfacecableHA010604ortheEE-PCAProductCongurationAdapterwiththe
cable HA011063 to connect the EE371 to a PC.
7 Calibration / Adjustment
7.1 Denitions
Calibration
The calibration documents the accuracy of a measurement device. The device under test (specimen) is
comparedwiththereferenceandthedeviationsaredocumentedinacalibrationcerticate.Duringthe
calibration, the specimen is not changed or improved in any way.
Adjustment
The adjustment improves the measurement accuracy of a device. The specimen is compared with the
reference and brought in line with it. An adjustment can be followed by a calibration which documents
the accuracy of the adjusted specimen.
The dew point temperature adjustment of EE371 can be performed with the free EE-PCS Product Con-
gurationSoftware,freedownloadatwww.epluse.com/congurator
7.2 Customer adjustment - Dew Point
The dew point adjustment can only be performed if the span between the air or gas temperature Ta and
the reference dew point temperature Td is higher 60 °C (108 °F).
Example:
ForTa=20°C(68°F),thereferenceTdmustbe<-40°C(-40°F).

13
Manual EE371 Dew point transmitter
8 Maintenance
8.1 Sensor cleaning and lter replacement
Pleasesee“Cleaninginstructions”atwww.epluse.com.
Filter cap
Sensing element
Fig. 6 EE371 Filter and Sensor
8.2 Self-diagnostic and error messages
Self-diagnostic via LED on the circuit board:
Power LED (green):
• ashing => EE371iscorrectlypowered/themicroprocessorisactive
• constantlylit=> Electronicsdefect=>pleasecontacttheproducer
LED D1 (blue):
• constantlylit => Thesensingelementisdamaged
• ashing => Thesensingelementiswet(condensation)
Self-diagnostic via display (option):
• Error1 => Thehumiditysensingelementisdamaged
• Error2 => Thesensingelementiswet(condensation)
• Error3 => Thetemperaturesensingelementisdamaged
• Error4 => Shortcircuitonthetemperaturesensingelement

14 Manual EE371 Dew point transmitter
9 Accessories
Description Order code
Sampling cell with quick connector HA050102
Basic sampling cell ISO HA050103
Basic sampling cell NPT HA050105
Sampling cell for ambient pressure HA050106
Stainlesssteelsinteredlter(includedinthescopeofsupply) HA010103
9.1 Scope of Supply
• Dew point transmitter
• Mating connector
• Quick user guide
• CalibrationCerticateacc.DINEN10204-3.1
10 Technical Data
Measuring Quantities
Dew p oint (Td)
Dew point sensor HMC01
Measuring range -60...60 °C Td (-76...140°F Td)
Accuracy
80
60
40
20
0
-20
-40
-60
010 20 30 40 50 60
-10
-20
-30
-40
80
60
40
20
0
-20
-40
-60
-80
010 20 30 40
-10
-20
-30
-40 6050
dew point temperature (°C)
process temperature (°C)
Accuracy ≤±2°C Td (≤± 3.6°F)
Response time t90 80 sec. -20 °C Td →-40°C Td (-4 °F Td → -40 °F Td)
10 sec. -40 °C Td →-20°C Td (-40 °F Td →-4 °F Td)
Volume concentration
Measuring range 20...200,000ppm
Accuracy at 20°C (68°F) and 1013mbar ±(5 ppm + 9 % from measured value)
Outputs
EE371-Tx two freely selectable and scaleable 0 - 1 V / 0 - 5 V / 0 - 10 V1) -1mA<IL<1mA
analogue outputs for Td, Tf, Wv 4 - 20 mA / 0 - 20 mA RL<500Ohm1)
EE371-Sx Alarm output 2 potential-free relays (NC)
30 V DC 0.6 A / 35V AC 0.3 A (resistive)
General
Supply voltage 10...30 V DC
Current consumption at 24V DC voltage output: typ. 40 mA / during auto-calibration: 100 mA
current output: typ. 80 mA / during auto-calibration: 140 mA
Pressure range 0...20 bar (0...290 psi) / 0...100 bar (0...1450 psi)
System requirements for software WINDOWS 2000 or later; serial interface
Serial interface for configuration RS232C
Housing / protection class Al Si 9 Cu 3 / IP65
Electrical connection 7-pole industrial plug: DIN VDE 0627 / IEC 61984
cable cross-section: 0.25 - 1 mm2
cable connection: PG 11
Sensor protection stainless steel sintered filter
Working temperature range probe: -40...70 °C (-40...158 °F)
electronic: -40...60 °C (-40...140 °F)
with LC display: -20...50 °C (-4...122 °F)
Storage temperature range -40...60 °C (-40...140 °F)
Electromagnetic compatibility according to EN 61326-1 EN61326-2-3 ICES-003 ClassB
Industrial Environment FCC Part15 ClassB
1) minimum supply voltage 15 V DC

15
Manual EE371 Dew point transmitter

HEADQUARTERS
E+E Elektronik Ges.m.b.H.
Langwiesen 7
A-4209 Engerwitzdorf
Austria
Tel: [phone]
Fax: [phone]
[email protected]
www.epluse.com
SUBSIDIARIES
E+E Elektronik Germany
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Office Bad Homburg
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