Panametrics DigitalFlow XMT868i, Руководство по обслуживанию

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DigitalFlow™ XMT868i Service Manual 9
Chapter 4. Parts Replacement
4.7.2 Installing the Circuit Board Assembly
Be sure that the circuit board assembly is completely assembled, as described in the previous section. Then, refer to
Illustrations 1, 2 and 3 in Figure 7 on page 11 and install the circuit board assembly into the electronics enclosure as
follows:
1. Slide the terminal board end of the circuit board assembly into the front of the electronics enclosure. By aligning
the slots around the circumference of the terminal board with the bosses inside the enclosure, guide the circuit
board assembly into the enclosure until the terminal board just clears the bosses at the rear of the enclosure.
(Refer to Illustration 3.)
2. From the rear of the enclosure, rotate the circuit board assembly about 20° clockwise so that the mounting holes
in the terminal board are positioned over the tapped holes in the bosses. Secure the circuit board assembly to
the enclosure with the four mounting screws, flat washers and lock washers previously removed. (Refer to
Illustration 2.)
IMPORTANT: If the circuit board assembly is inserted too far into the enclosure, it cannot be rotated properly.
3. Attach the loose end of the green grounding jumper wire to the enclosure with the mounting screw, flat washer
and lock washer previously removed. Be sure to install the metal label plate under this screw. (Refer to Illustration
2.)
4. From the rear of the enclosure, connect the power line leads to terminal block TB5. Plug the connectors back into
terminal blocks J1-J4. If necessary, see Chapter 1, Installation , of the Startup Guide for detailed wiring instruction.
5. Install the front and rear covers on the electronics enclosure and secure them in place with the set screws
provided. (Refer to Illustration 1.)
The Model XMT868i is now ready to be placed back into service. Before taking measurements with the Model
XMT868i, refer to Chapter 2, Initial Setup , of the Startup Guide and Chapter 1, Calibration , of this manual for
instructions on properly setting up the meter for accurate flow rate measurements.
Note: Be sure to enter a complete and detailed account of any parts replacement performed on the Model
XMT868i in Appendix A, Service Record .
To purchase the parts mentioned in this chapter or any items not specifically discussed, contact the factory for
assistance. To make sure the proper components are obtained, be sure to specify the serial number of the Model
XMT868i at the time of purchase.