FISCHER DE45 Operating Manual
Operating manual
DE45
Digital differential pressure switch / transmitter
with colour-change LCD
09005352 BA_EN_DE45_LCD Rev. ST4-D 09/15
*09005352*
Table of Content Fischer Mess- und Regeltechnik GmbH
ii BA_EN_DE45_LCD_Rev. ST4-D
Table of Content
1 Safety instructions.........................................................................................................................................4
1.1 General.....................................................................................................................................................4
1.2 Personnel Qualification ............................................................................................................................4
1.3 Risks due to Non-Observance of Safety Instructions...............................................................................4
1.4 Safety Instructions for the Operating Company and the Operator ...........................................................4
1.5 Unauthorised Modification........................................................................................................................4
1.6 Inadmissible Modes of Operation.............................................................................................................4
1.7 Safe working practices for maintenance and installation work.................................................................5
1.8 Pictogram explanation..............................................................................................................................5
2 Product and functional description.............................................................................................................. 6
2.1 Intended use.............................................................................................................................................6
2.2 Part designations......................................................................................................................................6
2.3 Function diagram......................................................................................................................................7
2.4 Design and mode of operation .................................................................................................................7
3 Installation ......................................................................................................................................................8
3.1 General.....................................................................................................................................................8
3.2 Process connection ..................................................................................................................................8
3.3 Electrical connection ................................................................................................................................8
4 Commissioning ............................................................................................................................................10
4.1 General...................................................................................................................................................10
4.2 Configuration ..........................................................................................................................................10
4.3 Control Elements....................................................................................................................................10
4.4 Menu levels ............................................................................................................................................12
5 Maintenance .................................................................................................................................................22
5.1 Maintenance...........................................................................................................................................22
5.2 Transport ................................................................................................................................................22
5.3 Service ...................................................................................................................................................22
5.4 Disposal..................................................................................................................................................22
6 Technical data ..............................................................................................................................................23
6.1 Input variables ........................................................................................................................................23
6.2 Output parameters .................................................................................................................................23
6.3 Auxiliary energy .....................................................................................................................................24
6.4 Measuring accuracy ...............................................................................................................................24
6.5 Application conditions.............................................................................................................................25
6.6 Construction design................................................................................................................................25
6.7 Display and operating interface..............................................................................................................27
6.8 Certificates and approvals......................................................................................................................27
7 Order Codes .................................................................................................................................................28
7.1 Device specification................................................................................................................................30
7.2 Accessories ............................................................................................................................................30
8 Attachments .................................................................................................................................................31
8.1 EC Declaration of conformity..................................................................................................................31
8.2 EAC Declaration.....................................................................................................................................32
Fischer Mess- und Regeltechnik GmbH Masthead |
BA_EN_DE45_LCD_Rev. ST4-D 3 / 32
Masthead
Manufacturer: FISCHER Mess- und Regeltechnik GmbH
Bielefelderstr. 37a
32107 Bad Salzuflen
Telefon: +49 5222 974 0
Telefax: +49 5222 7170
eMail: info@fischermesstechnik.de
web: www.fischermesstechnik.de
Technical editorial team: Documentation representative: S. Richter
Technical editor: R.Kleemann
All rights, also those to the translation, reserved. No part of these instructions
may be reproduced or processed, duplicated or distributed using electronic systems or any other form (print, photocopy, microfilm or another process) without
the written consent of the company Fischer Mess- und Regeltechnik GmbH,
Bad Salzuflen.
Reproduction for internal use is expressly allowed.
Brand names and procedures are used for information purposes only and do
not take the respective patent situation into account. Great care was taken
when compiling the texts and illustrations; nevertheless, errors cannot be ruled
out. The company FISCHER Mess- und Regeltechnik GmbH will not accept any
legal responsibility or liability for this.
Subject to technical amendments.
© FISCHER Mess- und Regeltechnik 2014
1 | Safety instructions Fischer Mess- und Regeltechnik GmbH
4 / 32 BA_EN_DE45_LCD_Rev. ST4-D
1 Safety instructions
1.1 General
WARNING
This operating manual contains instructions fundamental to the installation, operation and maintenance of the device that must be observed unconditionally. It
must be read by the assembler, operator and the specialized personnel in
charge of the instrument before it is installed and put into operation.
This operating manual is an integral part of the product and therefore needs to
be kept close to the instrument in a place that is accessible at all times to the
responsible personnel.
The following sections, in particular instructions about the assembly, commissioning and maintenance, contain important information, non-observance of
which could pose a threat to humans, animals, the environment and property.
The instrument described in these operating instructions is designed and manufactured in line with the state of the art and good engineering practice.
1.2 Personnel Qualification
The instrument may only be installed and commissioned by specialized personnel familiar with the installation, commissioning and operation of this product.
Specialized personnel are persons who can assess the work they have been
assigned and recognize potential dangers by virtue of their specialized training,
their skills and experience and their knowledge of the pertinent standards.
1.3 Risks due to Non-Observance of Safety Instructions
Non-observance of these safety instructions, the intended use of the device or
the limit values given in the technical specifications can be hazardous or cause
harm to persons, the environment or the plant itself.
The supplier of the equipment will not be liable for damage claims if this should
happen.
1.4 Safety Instructions for the Operating Company and the Operator
The safety instructions governing correct operation of theinstrument must be
observed. The operating company must make them available to the installation,
maintenance, inspection and operating personnel.
Dangers arising from electrical components, energy discharged by the medium,
escaping medium and incorrect installation of the device must be eliminated.
See the information in the applicable national and international regulations.
Please observe the information about certification and approvals in the Technical Data section.
1.5 Unauthorised Modification
Modifications of or other technical alterations to the instrument by the customer
are not permitted. This also applies to replacement parts. Only the manufacturer is authorised to make any modifications or changes.
1.6 Inadmissible Modes of Operation
The operational safety of this instrument can only be guaranteed if it is used as
intended. The instrument model must be suitable for the medium used in the
system. The limit values given in the technical data may not be exceeded.
The manufacturer is not liable for damage resulting from improper or incorrect
use.
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1.7 Safe working practices for maintenance and installation work
The safety instructions given in this operating manual, any nationally applicable
regulations on accident prevention and any of the operating company's internal
work, operating and safety guidelines must be observed.
The operating company is responsible for ensuring that all required maintenance, inspection and installation work is carried out by qualified specialized personnel.
1.8 Pictogram explanation
DANGER
Type and source of danger
This indicates a direct dangerous situation that could lead to death or serious
injury (highest danger level).
a) Avoid danger by observing the valid safety regulations.
WARNING
Type and source of danger
This indicates a potentially dangerous situation that could lead to death or serious injury (medium danger level).
a) Avoid danger by observing the valid safety regulations.
CAUTION
Type and source of danger
This indicates a potentially dangerous situation that could lead to slight or serious injury, damage or environmental pollution (low danger level).
a) Avoid danger by observing the valid safety regulations.
NOTICE
Note / advice
This indicates useful information of advice for efficient and smooth operation.
2 | Product and functional description Fischer Mess- und Regeltechnik GmbH
6 / 32 BA_EN_DE45_LCD_Rev. ST4-D
2 Product and functional description
2.1 Intended use
The DE45 is a multi-functional switching unit with an optional transmitter output.
It is suitable for measuring overpressure, underpressure and differential pressure in gaseous media. The device is to be exclusively used for the applications
agreed between the manufacturer and user.
Typical applications
▪ Monitoring of roll filters, extraction systems etc.
▪ Draft measurement in chimneys
▪ Flow and control pressure measurements
▪ Surface coating systems
Important features
▪ Robust, resistant to overpressure and maintenance-free
▪ Optional signal output with possibility of characteristic curve spread and re-
versal with any offset
▪ Characteristic curve implementation via table with max. 30 measuring points
▪ 4...6-digit LCD, full graphic, colour backlighting
2.2 Part designations
1
2 3
4
5
68 7
Illustration1: Part designations
1 Membrane keyboard 5 M12 connector 2 (4-pin, male)
2 LC display 6 M12 connector 1 (5-pin, male)
3 Casing lid 7 Process connection (-)
4 Lower part of casing 8 Process connection (+)
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2.3 Function diagram
21 3
4
5
6
7
Illustration2: Function diagram DE45_LCD
1 Sensor element 5 LC display
2 Signal processing 6 Analogue output
3 Switching outputs 7 Microcontroller
4 Membrane keyboard
2.4 Design and mode of operation
The device is based on a piezo-resistive sensor element that is suitable for
measuring overpressure, underpressure and differential pressure. The pressures to be compared directly act on a silicon diaphragm equipped with piezoresistive resistors.
When the pressure is equal, the measuring diaphragm is in its idle state. In the
event of differential pressure, the diaphragm is moved toward the lower pressure which changes the resistance of the attached resistors. This change is
evaluated by the device's electronics and transformed into the display, switch
contacts or an optional output signal.
The optional output signal can be dampened, spread, inverted and transformed
via a table function even if it is non-linear.
3 | Installation Fischer Mess- und Regeltechnik GmbH
8 / 32 BA_EN_DE45_LCD_Rev. ST4-D
3 Installation
3.1 General
The device is designed for installation onto flat assembly plates. For screw connection to the assembly plate, the device features four assembly bores on its
back, which can be used for Ø 3.5 mm tapping screws.
Optionally, the device can be delivered with a wall-mounting plate.
At the factory, the device is calibrated for vertical installation, but the installation
position is arbitrary. For any installation positions that are not vertical, the zeropoint signal can be corrected via the installed offset correction.
The enclosure protection type IP 65 is only guaranteed, if a suitable power supply cable is used.
If the device is intended for outdoor use, we recommend permanently protecting the membrane keypad against UV radiation and using a suitable enclosure
or at least the erection of a sufficiently dimensioned canopy as a protection
measure against constant rain or snow.
3.2 Process connection
▪ By authorized and qualified specialized personnel only.
▪ The pipes need to be depressurized when the instrument is being connec-
ted.
▪ Appropriate steps must be taken to protect the device from pressure surges.
▪ Check the suitability of the instrument for the media that is to be measured.
▪ Maximum pressures must be observed (cf. Tech. data)
CAUTION
Do not blow into the pressure connections.
This can damage the pressure sensor.
Illustration3: Process connection
The pressure measuring lines must be installed on a gradient so that no water
pockets for gas measurements can be created. If the required incline is not
reached, water filters need to be installed at suitable points.
The pressure sensing lines need to be kept as short as possible and installed
without sharp bends to avoid interfering delay times.
The pressure connections are marked with (+) and (-) symbols on the device.
When the differential pressure is measured, the higher pressure is connected to
the (+) side and the lower pressure to the (-) side.
If the pressure sensing lines are already pressurised at the time of commissioning, zero-point control and adjustment cannot be performed. In such cases, the
device should be only connected to the mains without the pressure sensing
lines.
3.3 Electrical connection
Electrical connection
▪ By authorized and qualified specialized personnel only.
▪ When connecting the device, the relevant national and international electro-
technical rules must be observed.
▪ Disconnect the system from the mains, before electrically connecting the
device.
▪ Switch the consumer-adapted fuses.
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The nominal supply voltage and the permissible range can be found in the technical data.
The admissible load / resistance for the signal output is stated in the technical
data.
The connection "Signal ground“ (-Sig) is connected internally to the supply
ground. It only serves as the ground connection for the output signal. This
means that the output signal is free of interference levels on the power supply
lines.
3-wire connection
The device is connected as follows in a 3-wire switch:
The connection "Signal ground“ (-Sig) is connected internally to the supply
ground. It only serves as the ground connection for the output signal. This
means that the output signal is free of interference levels on the power supply
lines.
Input
Output
AC
DC
Sensor
Signal
+U
b
- U
b
- Sig
+Sig
+U
b
- U
b
p
1
3
2
4
Illustration4: 3L-switch with internal bridge –Ub / -Sig
Connector 1: Supply and output signal
Illustration5: M12 Plug 5-pin
Pos Description Cable colour
A Coding A
B Internal bridge
1 +UbSupply brown
2 -Sig Signal white
3 -UbSupply blue
4 +Sig Signal black
5 n.c.
Connector 2: Switching outputs
Illustration6: M12 Plug 4-pin
Pos Description Cable colour
A Coding A
1 SP1 Switch point 1 (no) brown
2 SP2 Switch point 2 (no) white
3 SP2 Switch point 2 (com) blue
4 SP1 Switch point 1 (com) black
4 | Commissioning Fischer Mess- und Regeltechnik GmbH
10 / 32 BA_EN_DE45_LCD_Rev. ST4-D
4 Commissioning
4.1 General
All electrical supply, operating and measuring lines, and the pressure connections must have been correctly installed before commissioning. All supply lines
are arranged so that there are no mechanical forces acting on the device.
Check that the pressure connections do not leak before commissioning.
4.2 Configuration
During commissioning there are a number of setting options that allow the
device to be adapted to the measuring point and measuring task. To facilitate
the input, the individual parameters are placed into groups in so-called menu
levels.
Depending on the device model some menu items are not available. For instance, no switch points can be set on a device without contacts.
NOTICE
Parameter configuration on the PC
All the device settings can be made easily on the PC using the PC adapter. You
will need a EU03 Transmitter PC Interface and the associated software TransPara for this. For more details, please refer to the Accessories section. The
TransPara software makes all parameters directly visible and accessible. Also,
the entire configuration can be loaded, saved and documented as a printout.
4.3 Control Elements
LC display
Illustration7: DE45 LCD display
1 LCD with back lighting 4 Unit
2 Measurement display 4…6 digits 5 Bar chart display
3 Status display of the switch
points
6 Keyboard
In normal mode, the current measured value is shown on a 4-digit LC display.
To show very large values, it is possible to switch to a 5 or 6-digit presentation
(see Parameter MB decimal place).
Illustration8: Display SP1 SP2
The unit is shown on the right of the display. If the device is equipped with contacts, a closed contact is always symbolised by an inverted text "SP1" or "SP2".
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