FISCHER DE45 Operating Manual
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FISCHER DE45 Operating Manual

Digital differential pressure switch / transmitter with colour-change lcd
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Operating manual

DE45
Digital differential pressure switch / transmitter
with colour-change LCD

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Summary of Contents for FISCHER DE45

  • Page 1: Operating Manual

    Operating manual DE45 Digital differential pressure switch / transmitter with colour-change LCD...

  • Page 2: Table Of Contents

    Table of Content Fischer Mess- und Regeltechnik GmbH 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...
  • Page 3 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.

  • Page 4: Safety Instructions

    1 | Safety instructions Fischer Mess- und Regeltechnik GmbH 1 Safety instructions 1.1 General This operating manual contains instructions fundamental to the installation, op- WARNING eration 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.

  • Page 5: Safe Working Practices For Maintenance And Installation Work

    Fischer Mess- und Regeltechnik GmbH Safety instructions | 1 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.

  • Page 6: Product And Functional Description

    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 pres- sure in gaseous media. The device is to be exclusively used for the applications agreed between the manufacturer and user.

  • Page 7: Function Diagram

    Fischer Mess- und Regeltechnik GmbH Product and functional description | 2 2.3 Function diagram Illustration 2: Function diagram DE45_LCD Sensor element LC display Signal processing Analogue output Switching outputs Microcontroller 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.

  • Page 8: Installation

    3 | Installation Fischer Mess- und Regeltechnik GmbH 3 Installation 3.1 General The device is designed for installation onto flat assembly plates. For screw con- nection to the assembly plate, the device features four assembly bores on its back, which can be used for Ø 3.5 mm tapping screws.
  • Page 9 Fischer Mess- und Regeltechnik GmbH Installation | 3 The nominal supply voltage and the permissible range can be found in the tech- nical 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.

  • Page 10: Commissioning

    4 | Commissioning Fischer Mess- und Regeltechnik GmbH 4 Commissioning 4.1 General All electrical supply, operating and measuring lines, and the pressure connec- tions must have been correctly installed before commissioning. All supply lines are arranged so that there are no mechanical forces acting on the device.
  • Page 11 Fischer Mess- und Regeltechnik GmbH Commissioning | 4 Various colours can be selected for the back lighting. Depending on the meas- ured value, the colour of the back lighting can be automatically changed. This can be used e.g. to depict good/poor differences. The back lighting can also be deactivated.

  • Page 12: Menu Levels

    4 | Commissioning Fischer Mess- und Regeltechnik GmbH 4.4 Menu levels The menu levels are structured as follows: Output menu level Menu Level Reception Switch points Menu Level Input Menu Level Measuring Menu Level Output Menu Level Function Menu Level...
  • Page 13 Fischer Mess- und Regeltechnik GmbH Commissioning | 4 The two switch outputs are configured by four parameters respectively. For the switch point 1 these are ▪ SP1 On ▪ SP1 Off ▪ SP1 Delay ▪ SP1 Function Accordingly for switch point 2: ▪...
  • Page 14 4 | Commissioning Fischer Mess- und Regeltechnik GmbH You can set the response time to pressure jumps in the range 0.0 to 100 s. Response time NOTICE At maximum damping it can take over 2 minutes until the pressure jump from the nominal pressure 100% to 0% is also shown as zero in the display.
  • Page 15 Fischer Mess- und Regeltechnik GmbH Commissioning | 4 The parameters MB start MB end initially define the two pressures between which the output signal will change at all. Both values are adjustable across the entire basic measuring range. The set values also refer to the pres- sure in the respective unit.
  • Page 16 4 | Commissioning Fischer Mess- und Regeltechnik GmbH Square rooted function Here, the input signal is square rooted before being sent to the display and the output. This is necessary e.g. for flow measurements with differential pressure. A free unit can be defined for the display. To do this, the start and end of the display range and the number of decimal points are defined.
  • Page 17 Fischer Mess- und Regeltechnik GmbH Commissioning | 4 Number of value pairs NOTICE If the number of value pairs is changed, the table is initialised again and the ex- isting values are deleted. Value pair +14,6 mbar +8,6 % +0,0 ...
  • Page 18 4 | Commissioning Fischer Mess- und Regeltechnik GmbH If permanent lighting is not required, the parameter Lighting time can be used to define when the lighting should be switched off after the last time a button is pressed. In addition to permanent lighting (0 s), automatic shut-down after 10…...
  • Page 19 Fischer Mess- und Regeltechnik GmbH Commissioning | 4 The parameter Hysteresis can be used to prevent fast and unwanted colour changes. The hysteresis is set in the range 0.1... 10%. Overlapping colour areas NOTICE Note: In the case of large hysteresis values, steps must be taken to ensure that the ranges of the individual colours do not overlap.
  • Page 20 4 | Commissioning Fischer Mess- und Regeltechnik GmbH Basic measuring range Illustration 15: Function Auto2 MB-start Measuring range start Red-Yell.switch. Colour-change red to yellow Yell.-Gr.switch. Colour-change yellow to green Gr.-Yell. switch Colour-change green to yellow Yell.-Red switch Colour-change yellow to red...
  • Page 21 Fischer Mess- und Regeltechnik GmbH Commissioning | 4 Parameter name Description Value range Save config. Save configuration The user menu can be switched to German, English, French, Spanish, Italian, Portuguese or Hungarian using the parameter Language. The menu items Software - Info...

  • Page 22: Maintenance

    5 | Maintenance Fischer Mess- und Regeltechnik GmbH 5 Maintenance 5.1 Maintenance The instrument is maintenance-free. We recommend the following regular in- spection to guarantee reliable operation and a long service life: ▪ Check the function in combination with downstream components.

  • Page 23: Technical Data

    Fischer Mess- und Regeltechnik GmbH Technical data | 6 6 Technical data Please also observe the order code here. 6.1 Input variables Measuring variable Differential pressure for gas-like media Measuring Range Measuring Range Stat. operating Bursting pressure max. pressure mbar...

  • Page 24: Auxiliary Energy

    6 | Technical data Fischer Mess- und Regeltechnik GmbH Switching outputs 2 potential-free relay contacts 2 potential-free semiconductor switches (MOSFET) Relay MOSFET Progr. switching function Open contact (NO) One-pin activator (NO) Break contact (NC) One-pin deactivator (NC) Max. switching voltage 32 V AC/DC 3…32 V AC/DC...

  • Page 25: Application Conditions

    Fischer Mess- und Regeltechnik GmbH Technical data | 6 Temperature coefficient Measurement TK zero-point TK span (TK) range [% FS/10K] [% FS/10K] mbar typ. max. typ. max. 0…4 0…6 0…10 0…16 0…25 0…40 0…60 0…100 0…160 0…250 ±2.5 ±4 ±6 ±10...
  • Page 26 6 | Technical data Fischer Mess- und Regeltechnik GmbH Wall mounting Wall mounting plate Rear view 70.5 without wall mounting plate 61.5 Ø5 M12 plug connection 4x boreholes for Connector 2 Connector 1 Hose screw connection sheet metal screw Ø3.5...

  • Page 27: Display And Operating Interface

    Fischer Mess- und Regeltechnik GmbH Technical data | 6 Assembly of the mounting rails Attachment element TS35 TS35 61,5 TS15 TS32 6.7 Display and operating interface Display 4...6-digit LCD, full graphic, colour backlighting Programming Attenuation 0.0 … 100.0 s (jump response time 10 / 90 %) for signal output;...

  • Page 28: Order Codes

    7 | Order Codes Fischer Mess- und Regeltechnik GmbH 7 Order Codes Code no. 10 11 12 13 14 15 17 18 19 20 21 Type unused Illustration 18: Order code DE45_LCD Measuring range: [1.2] (Code no.) 0 … 4 mbar 0 …...
  • Page 29 Fischer Mess- und Regeltechnik GmbH Order Codes | 7 [1.2] (Code no.) 0 … 1 kPa 0 … 1.6 kPa 0 … 2.5 kPa 0 … 4 kPa 0 … 6 kPa 0 … 10 kPa -1 … +1 kPa -1.6 …...

  • Page 30: Device Specification

    7 | Order Codes Fischer Mess- und Regeltechnik GmbH Assembly option: [12] (Code no.) Standard (attachment boreholes on rear side) Mounting rail installation Panel mounting set Wall mounting 7.1 Device specification Device specification on request. 7.2 Accessories Order no. Designation No.

  • Page 31: Attachments

    Fischer Mess- und Regeltechnik GmbH Attachments | 8 8 Attachments 8.1 EC Declaration of conformity Illustration 19: CE_DE_EN_DE45_LCD BA_EN_DE45_LCD_Rev. ST4-D 31 / 32...

  • Page 32: Eac Declaration

    8 | Attachments Fischer Mess- und Regeltechnik GmbH 8.2 EAC Declaration Illustration 20: EAC_RU_D-DE-ME61-B-00005 32 / 32 BA_EN_DE45_LCD_Rev. ST4-D...

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