Fischer DE90 Differential Pressure Transmitter

Fischer DE90 differntial pressure transmitter is used in a two-channel variant to monitor TDO oven filter pressures.

1 Electrical connection

File:FischerDE90Connection.png

1.1 Plug Pin Out

File:FischerDE90Plug.png

Use a preassembled 5pin cable Murr Elektronik

1.2 Drawing sample

File:FischerDN90drawing.PNG

1.3 Drawing sample 2

File:Drawing sample 2025.jpg

2 Configuration

2.1 Acess

Use default password " 000 " for access.

From the “Measured value display”

File:FischerDE90 Messwertanzeige.jpg

• Just need to press: 5x ENTER -> UP -> ENTER.
• Then the login is done and main menu (Level 0) is displayed again to start further configuration.

File:FischerDE90 Hauptmenue.jpg

2.2 Language

• Change Language to English if needed.
• After login at the main menu (Level 0)
  • go to “Parametrierung” (Level 1) -> “Anzeige” (Level 2) -> “Sprache” (Level 3).
  • Change here to “English” -> the display language will change immediately to English.
• ->Go “back” to Level 1

File:FischerDE90 Sprache.jpg

2.3 Check settings of the sensor

All below settings need to change for Channel 1 & 2 accordingly, if it is a 2-channel-sensor. 

2.3.1 Analog output

• Go back to “Configuration” menu (Level 1)
  • -> Configuratoin -> Analogue output
• Verify under “An.output 1 type” (and “An.output 2 type” if a 2 channel sensor), if it is set to 4..20mA.

File:FischerDE90 AnalogueOutput.jpg

2.3.2 Measuring Unit

File:FischerDN90Unit.PNG

2.3.3 Measuring Range

• Start Value => should be 0
• End Value => Usually maximum sensor scale

File:FischerDN90Range.PNG

Note the value of measuring end and insert the same at the corresponding WinCC parameter panel under “Factor * ”

File:FischerDE90 Para fac mul.jpg

2.4 Damping

• Without damping, the display is fluctuating extremely.
  • (do channel 1 and 2)
• After check measuring end
  • -> “Back” -> “Damping C1” => set 1s
• Path: \Configuration\Channel 1\Measurement C1\Damping C1

(Level: 4)

File:FischerDE90 C1 damping.jpg

File:FischerDE90 C1 damping2.jpg

2.5 Color change of the display

• Green the act value is within range.
• Red means it is beyond.
• Here it is important what is set into the WinCC parameter panel (values from ET)
  • For example: in WinCC is set “warning max” or “Alarm max” to 300:
  • “Col.ch. C1 red–grn” -> set approx. 10pa lower than the expected min -> -10 (display is green when line is stopped and not blinking red-grn).
  • “Col.ch. C1 grn–red” -> set the value from WinCC -> 300

• “Col.ch. C1 hyst” -> set between 5 and 10

File:FischerDE90 C1 ColorChange.jpg

File:FischerDE90 Para WarMin.jpg

Configuration is finished

2.6 Zeropoint calibration

This is usually done by the process specialist after dry-run.

File:FischerDN90Zeroing.PNG

2.7 USB-function

• The device has a function to save and load the parameters.
• With this, it is very easy to configure several devices in short time (like at the TDO annealing zones).
• Difficult is that the device (of year 2025) just has a micro-USB port and is supporting USB-Sticks just up to 16GB (FAT23 was okay, NTFS was not tested). Hopefully in the future they will put a USB-C port, because is difficult to find an adaptor from micro-USB to USB. Connecting a PC directly is also not working.
• The mentioned PC software 'inTouch' was also not testes yet. The parameter files can be modified with PsPad, but needs to take care what are you doing there.

File:FischerDE90 USBport.jpg