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Troubleshooting
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56
9.6
Removing and installing electronics boards
9.6.1
Field housing: removing and installing electronics boards
→ å 35
Warning!
• Risk of electric shock.
Exposed components carry dangerous voltages. Make sure that the power supply is switched off
before you remove the cover of the electronics compartment.
• Risk of damaging electronic components (ESD protection). Static electricity can damage electronic
components or impair their operability. Use a workplace with a grounded working surface,
purpose-built for electrostatically sensitive devices!
• If the dielectric strength of the device cannot be guaranteed maintained in the following steps,
then an appropriate inspection must be carried out in accordance with the manufacturer's
specifications.
Caution!
Use only genuine Endress+Hauser parts.
Commissioning a new electronics board:
1.
Switch off power supply.
2.
Unscrew cover of the electronics compartment from the transmitter housing.
3.
Remove the local display (a) from the connection compartment cover.
4.
Press the side latches (b) and flip down the cover of the connection compartment.
5.
Disconnect the connector of the sensor cable (c).
6.
Disconnect the connector for the power supply (d) and the outputs (e).
7.
Disconnect the connector of the local display (f).
8.
Release the screws of the board carrier (g).
9.
Pull entire module (plastic retainer and electronics board) out of the housing.
10. Plug out the ground cable (h) of the electronics board.
11. Disconnect T-DAT.
12. Press the side latches (i) slightly outwards and partly push out the electronics board towards
the rear from the front.
13. Remove the electronics board from the plastic retainer from the rear.
14. Installation is the reverse of the removal procedure.
Proline Prosonic Flow 91
Endress+Hauser
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