17
Calibration Access
Use the following procedures to gain access to the calibration adjustments of your instrument.
1. Set Line Power switch to OFF.
2. Disconnect the power cord from the rear of the instrument.
3. Remove the two upper screws on each side of the unit.
4. Grasp the top of the enclosure clamshell and lift it off the front and rear panels.
5. Slide the rear panel / PWB assembly upward until it is clear of the bottom enclosure clamshell.
6. All calibration adjustments are now accessible.
7. To reassemble, reverse steps 1-6 above.
NOTE
With the power cord replaced, the instrument is operational for service.
WARNING
Dangerous voltages exist inside the enclosure when energized. Exercise extreme care when
working on an energized circuit. See PWB layout diagram for high voltage areas.
Cleaning
CAUTION
Do not use aromatic hydrocarbons or chlorinated solvents for cleaning. These solutions will react with
the plastic materials used in the instrument.
Clean the front panel and case with a mild solution of detergent and a damp sponge. Clean dust from the
PWB with clean, dry, low pressure (<20 psi).Performance Test
The performance test compares the performance of your instrument with the list of specifications given
in Section 1. This test is recommended for incoming inspection, as a preventative maintenance check,
and to verify the specifications. It is not necessary to disassemble the instrument to conduct these tests.
If the instrument fails any part of the performance test, calibration and / or repair is indicated.
Allow the instrument to stabilize and perform the test at an ambient temperature of 23 C 5 C (73 F 9
F). During the performance test (and the calibration procedure) your Tester is referred as the UUT.
Summary of Contents for GF-30AC-T
Page 1: ...GF 30AC T Ground Circuit Tester Instruction Manual...
Page 3: ...3...
