25
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. All calibration adjustments are now accessible.
6. To reassemble, reverse steps 1-5 above.
WARNING
Dangerous voltages exist when energized. Exercise extreme care when
working on an energized circuit.
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).
Calibration Procedure
The Calibration Procedure should be performed annually and any time your instrument has
been repaired. The calibration procedure consists of two parts:
1)
The Voltage Calibration adjustment calibrates the voltage output to agree with the meter
reading.
2)
The Continuity Calibration adjustment sets the pass/fail point for the continuity check.
Before starting the Calibration procedure, perform the Calibration access procedure given earlier
in this Section.
NOTE
Allow the instrument to stabilize for approximately five minutes. Perform all calibration
adjustments at an ambient temperature of 23
°
C
±
5
°
C (73
°
F
±
9
°
F).
WARNING
CALIBRATION ADJUSTMENTS ARE PERFORMED ON ENERGIZED CIRCUITS.
EXERCISE CAUTION AT ALL TIMES, AND USE A NON-CONDUCTIVE TOOL FOR
ALL ADJUSTMENTS.
Summary of Contents for HT-2000P
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