ABB 266 DDS, Руководство пользователя

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2 6 6 DDS H A RT |
P R E SSU R E T R A N SM I T T ER S | O I/ 2 6 6 D DS - EN R E V. B 51
Pressure transducer replacement
If the pressure transducer needs to be replaced proceed as
follows:
1. Insulate the transmitter from the process by acting on the
manifolds or on the insulation valves.
2. Open the vent valves to allow sensor depressurization.
3. Disconnect the power supply and disconnect the wiring.
4. Disconnect the transmitter from the bracket unscrewing the
fixing bolts.
5. Open the communication board compartment cover.
6. The communication board is connected to the sensor via a
flat cable and a connector. Remove the communication
board and gently disconnect the connector.
7. Release the tang screw until and rotate the housing until its
complete removal.
8. Unscrew the transducer.
9. Replace the transducer with a new one.
10. The 266 can reconfigure itself with the previous configured
parameters thanks to the auto-configuration functionality.
11. Before powering on the transmitter raise dip-switches 1 and
2 in up position. Connect the transmitter to power supply,
wait ten seconds and lower dip-switched 1 and 2.
12. After installing the transmitter on the bracket and
connecting it to the manifold, perform a PV zero bias.
During replacement of the pressure transducer, please do not
disconnect the primary unit from the secondary one.
Electronic replacement
If the electronic module needs to be replaced proceed as
follows:
1. Insulate the transmitter from the process by acting on the
manifolds or on the insulation valves.
2. Open the vent valves to allow sensor depressurization.
3. Disconnect the power supply and disconnect the wiring.
4. Open the communication board compartment cover and
remove the LCD display (if installed).
5. Remove the communication board and gently disconnect
the connector.
6. Connect the sensor flat cable to the new electronic module
with dip switch 1 in up position.
7. Connect the transmitter to power supply, wait ten seconds
and lower dip-switch 1 to 0 position. 266 can reconfigure
itself with the previous configured parameters thanks to the
auto-configuration functionality.
During replacement of the electronic module, please do not
disconnect the primary unit from the secondary one.