REMOVING THE INSTRLJMENT FROM ITS CASE: To gain access to the printed
circuit board and for general servicing, the case (end pieces) must be removed from
the front panel.
"Calibration
To remove the case, first remove the cover (see instructions under
and Maintenance"). Next, remove the two screws from the tie bar located at the
top rear, just above the meter. Rotate the handle down toward the bottom rear of
the instrument. Gently pull end pieces outward (sideways) and away from front
panel. Lift end pieces up and away from front panel.
To remove the printed circuit board from the front panel, proceed as follows:
l. Remove the two (2) screws at the bottom rear of the unit that holds the
transformer bracket in place.
2. Remove the two (2) larye control knobs and control nuts on the front panel.
3. Slide the top portion of the meter back (away from front panel).
4. Remove the two (2) large meter retaining nuts located at approximately the
center of the P.C. Board.
5. Remove the meter from the front of the P.C. board. Sufficient lead length is
provided to allow servicing of the P.C. board components.
OVERLOAD PROTECTION: This instrument is protected against accidental
overloads on all functions and all ranges. The voltage ranges are protected because
the high input impedance limits the amount of voltage and current applied to the
gate of the FET. On the resistance and current functions, the fuse Fl and diode Dl
protect both the meter movement and the circuitry. This fuse strould be replaced
with one of the same type so that the protection feature and accuracy of this
instrument are not affected. Accuracy of the RX0.l range will be most affected by
using an incorrect fuse type.
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