OHAUS EXPLORER, Руководство по обслуживанию

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CHAPTER 3 REPAIR PROCEDURES
3.1.11 Monoblock Load Cell Removal Precision Top Loader Balance and Analytical (Cont.)
10. Remove the two Screws (3) on top of the PC Board (11).
11. Remove the Hex Screws (14) and Washers (25) at the rear of the balance which secure the connectors on
the PC Board (11).
12. Disconnect the two cable connectors from the Load Cell going to J2 and J6 on the PC board as shown on
Figure 5-3.The Load Cell (9). If internal calibration option is installed, disconnect cable to J4.
13. Carefully lift the PC Board (11) from the Base (18) there is a small cable from the Sensor Board which should
also be disconnected from the PC Board (not shown on Figure 5-3).
14. Remove four screws holding Internal Calibration Mechanism and lift out the Internal Calibration Mechanism.
Avoid touching the internal calibration mass.
15. Turn the balance over on its side and while holding the Monoblock Load Cell with one hand, remove the three
Screws (24) and Washers (23) from the bottom of the balance. The Load Cell (9) can now be removed.
3.1.12 Monoblock Load Cell Replacement for Precision Top Loader and Analytical Balances
After the Monoblock Load Cell Assembly has been repaired, it is installed as follows:
1.Carefully align the Monoblock Load Cell (9) in the Base (18) (Figure 5-3) so that there is equal space on both
sides of the Monoblock load Cell to the base sides. This is very important as the Balance will not function
properly and may drift.
2.Secure the Monoblock Load Cell to the Base (9) with the three Screws (24), Washers (23) previously removed
at the bottom of the Base (18). Make sure the Monoblock Load Cell is properly aligned before tightening the
screws.
3.Install the Internal Calibration Machanism to the Base and secure using 4 screws previously removed if required.
4.Connect the two cable connectors from the Monoblock Load Cell (9) to the Main PC Board edge connectors J2,
and J6. Dress the cables and make sure that the cables do not interfere with the Load Cell operation. If internal
calibration option is installed, connect cable to J4.
5.Secure the PC Board (11) to the Base (18) with the two Screws (3).
6.Install the Hex Screws (14) and Washers (25) at the rear of the balance into the connectors.
7.Install the Shield (4) back on the balance and secure with two Screws (3) (Figure 5-3).
8.Install the Subplatform (2) and secure with two Screws (1) (Figure 5-3) if required.
9.Replace the Cover (6) and and secure with two Screws (3) making sure that the Lockswitch
Cover Seal (4) is in place (Figure 5-1).
10. Replace the four Corner Spacers (5) with the open ends facing out (Figure 5-1) if required.
11. Replace the Pan (1) and Windshield (2) (Figure 5-1) or Draft Shield.
12. After assembly, verify that the balance meets all specifications. Perform all tests.