Servomex 01440002D, Руководство по обслуживанию

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01440D Light Industrial Gas Analyser Service Manual. 2.10
2.6 Replacing the Flow Sensor (01800925)
1. Unscrew both wires from TB4 on relay and output PCB (01420906).
2. Disconnect inlet and outlet tubes.
3. Unscrew flow sensor from rear panel assembly.
4. Installation is reverse of the removal process. (Reconnect to TB4)
5. The pipe from the AFCD goes to the inlet on the flow sensor.
6. Ensure pipework is leak tight. (See section 2.14.1 or 2.14.2)
2.7 Replacing the Power Supply Unit (PSU)
1. If necessary remove the transducer to improve access (See Section 2.3.1 for
the oxygen transducer or Section 2.4.1 for the infrared transducers). Note: For
oxygen transducers it is only necessary to disconnect the thermal fuse and
heating coil at TB2 on control PCB.
2. Remove the vented metal cover from over the power supply.
3. Disconnect mains power cable and the power cable to the control PCB at the
power supply.
4. Power supply variants
i) For analysers fitted with an old version power supply (MAP40 or FLU3-40-
3AD). Remove the hexagonal spacers and power supply.
ii) For latest version power supplies (Emerson LPT63) unscrew the 4 off M4
waisted screws holding power supply and cover mounting brackets and
remove brackets and power supply.
5. Installation is for power supply type Emerson LPT63 only.
i) Fit shakeproof washers to waisted M4 screws and screw through power
supply pcb, from component side.
ii) Position mounting brackets with individual lugs on copper side of supply pcb.
iii) Secure power supply and brackets to analyser chassis using m4 waisted
screws.
iv) Re-connect mains and control connector to power supply pcb, fit grommets
to new power supply cover and secure cover to brackets.
6. Ensure pipework is leak tight. See Sections 2.14.1 or 2.14.2.
7. Calibrate the analyser as described in the Operator Manual and check both
the analogue output and display reading. See Section 2.5.
WARNING
• The opening of covers or removal of parts, except those to which
access can be gained by hand, may expose electrical terminals.
Ensure power is disconnected before working on the analyser.