OHAUS 3000 Series T31P, Руководство по обслуживанию

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CHAPTER 4 TESTING
4.1 TESTING
Before and after servicing the Indicator, operational and performance tests should be made to
determine if it meets specifications. Turn the Indicator ON and allow it to warm up for at least 10
minutes before performing these checks. The masses used for calibration should be ASTM
Class 4 or OIML F2 tolerance or better.
NOTE:
Make sure the test area is free from drafts and that the base rests on a level and
vibration-free surface.
4.2 Power Test
The purpose of this test is to determine if the electronic circuitry of the Indicator is functioning
properly. In some cases, the AC Adapter or line cord supplied with the Indicator may have
become defective.
1. For the T31P, first be sure the AC Adapter is functioning properly, then connect it to the
Indicator power plug. (For the T31XW, check that the power cord is not damaged.)
2.
Plug the AC Adapter or power cord into a suitable power source.
3. With the Indicator connected to an appropriate power supply, press the ON/ZERO Off
button. The Indicator performs a self-test, indicates the software revision and then goes
into weighing mode.
4.
If all of the displays appear normal in this test, continue with the next test. If the display
did not appear, check the AC adapter output and repeat the test with a good adapter. If
the display was erratic, the PC board is defective and requires replacement.
4.3 Performance Tests Using a Scale Base
These tests are performed on the Indicator using a known good scale base and test mass.
At this point, the Indicator has been checked for full display, menu setup and calibrated.
If a Load Cell Simulator is being used, proceed to paragraph 4.4.
3000 Series T31 Indicators Service Manual 4-1 Ohaus Corporation www.ohaus.com