Manual Ranging  (220-0181A)    Care and Maintenance    Faxback Doc. # 7175
Multimeter

REPLACING THE FUSES

WARNING:  TO AVOID ELECTRICAL SHOCK, DISCONNECT THE TEST LEADS BEFORE YOU
          REMOVE THE BATTERIES OR FUSES.  REPLACE ONLY WITH THE SAME TYPE
          OF BATTERIES OR FUSES.  THIS UNIT CONTAINS NO USER-SERVICEABLE
          PARTS.  DO NOT REMOVE THE TOP COVER.

CAUTION:  FOR CONTINUED PROTECTION AGAINST FIRE OR OTHER HAZARD, REPLACE
          0.5-AMP FUSE WITH AN IDENTICAL 0.5-AMP, 250V FUSE
          (CAT. NO. 270-1241A).  REPLACE THE .063-AMP FUSE WITH AN
          IDENTICAL .063-AMP INSTRUMENT FUSE (CAT. NO. 270-1236).  ONE
          SPARE FUSE OF EACH TYPE COMES SUPPLIED WITH YOUR METER.

The meter has two fuses.  The .063-amp fuse protects the resistance,
capacitance, continuity, diode-check, and 4 mA current ranges.  The 0.5
amp fuse protects the 40 mA and 400 mA current ranges.  Follow these steps
to replace the fuse.

  1.  Turn off the meter and disconnect the test leads.

  2.  Open the battery/fuse compartment cover.

  3.  Pull the ribbon to remove the blown fuse.

  4.  Place the ribbon around a new fuse of the proper rating.  Use only a
      fuse of the same type and rating (0.5 A, 250 V, 5 x 20 mm miniature
      fuse and .063-amp instrument fuse).

  5.  Place the fuse in the fuse compartment.

  6.  Close the battery/fuse compartment cover.

WARNING:  DO NOT OPERATE THE METER UNTIL THE BATTERY/FUSE COVER IS IN
          PLACE AND FULLY CLOSED.

CARING FOR THE METER

The meter is a precision electronic device.  To avoid damage to the meter:

  Do not touch any of the circuitry inside the case.

  Do not expose it to temperatures below -4 degrees F (-20 degrees C) or
  above 140 degrees F (60 degrees C).

  Protect it from extremely humid areas.

  Never connect it to a source of voltage when you have set the meter to
  the resistance, continuity, or diode check functions.

  Operate it only when the battery cover is in place and fully closed.

  Remove the test leads and turn off the power before you replace the
  battery or fuse.

The meter comes fully calibrated and tested.  Under normal use, no
further adjustment should be necessary.  If the meter should require
repair, do NOT attempt to service it yourself: bring it to your nearest
Radio Shack store.  Service by UNAUTHORIZED PERSONNEL VOIDS THE WARRANTY.

The Radio Shack Manual Ranging Digital Multimeter is an example of
superior design and craftsmanship.  The following suggestions will help
you care for the meter so you can enjoy it for years.

  Keep the meter dry.  If it gets wet, immediately wipe it dry.  Liquids
  might contain minerals that can corrode the electronic circuits.

  Use and store the meter only in normal temperature environments.
  Temperature extremes can shorten the life of electronic devices, damage
  batteries, and distort or melt plastic parts.

  Handle the meter gently and carefully.  Dropping it can damage the
  circuit boards and cause the meter to work improperly.

  Keep the meter away from dust and dirt, which can cause parts to
  prematurely wear.

  Wipe the meter with a damp cloth occasionally to keep it looking new.
  Do not use harsh chemicals, cleaning solvents, or strong detergents to
  clean the meter.

  Use only fresh batteries of the recommended size and type.  Always
  remove old or weak batteries.  They can leak chemicals that destroy
  electronic circuits.

Modifying or tampering with the meter's internal components can cause a
malfunction and might invalidate the meter's warranty.  If the meter is
not performing as it should, take it to your local Radio Shack store for
assistance.

(br/all-6/18/94)