UEi DCM3 User Manual

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DCM3

INSTRUCTION MANUAL

Introduction

The DCM3 Digital Capacitance Meter offers solid value in an industrial
quality meter. The wide range of inputs allows testing from the smallest
electronic components to large run/start capacitors. The rugged
design with protective boot and auto power off function keep your
meter working.

Features include

• 0.1% to 20 mF (20,000 µF)

• Zero adjustment (±20 pF for compensation of the measuring leads)

• Fuse protected input

Safety Notes

Before using this meter, read all safety information carefully. In
this manual the word "WARNING" is used to indicate conditions
or actions that may pose physical hazards to the user. The word
"CAUTION" is used to indicate conditions or actions that may

damage this instrument.

Operating Instructions

WARNING!

To avoid electrical hazards, discharge the capacitor before measuring.

1. For capacitance measurement less than 200nF, it should make
"0-ADJ" for subtract the stray capacitance.

2. Set the range switch to the desired range.

3. Never apply an external voltage to the input terminals.
Damage to the meter may result.

4. Observe polarity when measuring polarized capacitors.

5. Insert the capacitor leads into the receptacle socket or directly connect

the test clip to the capacitor leads as required.

6. Read the capacitance direct from the display

Battery Replacement

Power is supplied by a 9 volt transistor battery. (NEDA 1604, IEC6F22). The
" " appears on the LCD display when replacement is needed. To replace the
battery, remove the two screws from the back of the meter and lift off the front
case. Remove the battery from battery contacts.

Fuse Replacement

If no current measurements are possible, check for a blown overload protection
fuse. There ia a fuse; F1 for the "Cx +" jack. For access to fuses, remove the two
screws form the back of the meter and lift off the front case. Replace F1 only
with the original type 0.25A/250V fuse.

M a i n t e n a n c e

Periodic service

WARNING!

Repair and service of this instrument is to be performed by qualified
personnel only. Improper repair or service could result in physical
degradation of the meter. This could alter the protection from
electrical shock and personal injury this meter provides to the
operator. Perform only those maintenance tasks that you are
qualified to do.

These guidelines will help you attain long and reliable service from
your meter:

1. Calibrate your meter annually to ensure it meets original
performance specifications.

2. Keep your meter dry. If it gets wet, wipe it dry immediately. Liquids
damage electronic circuits.

3. Whenever pra c t i cal, keep the meter away from dust and dirt, which
can cause premature wear.

4. Although your meter is built to withstand the rigors of daily use, it
can be damaged by severe impacts. Use reasonable caution when
using and storing the meter.

NOTE: When servicing the meter, use only the replacement parts specified.

Cleaning and Decontamination

Periodically clean your meter’s case using a damp cloth. DO NOT use
abrasives, cleaning solvents or strong detergents, as they may damage
the finish or affect the reliability of the structural components.

Battery Replacement

Always use a fresh replacement battery of the specified size and type.
Immediately remove the old or weak battery from the meter and
dispose of it in accordance with your local disposal regulations. Old or
defective batteries can leak chemicals that corrode electronic circuits.

WARNING!

To avoid electric shock, be sure to turn off the meter’s power and
disconnect both test leads from any equipment before you remove
or install batteries.

WARNING!

Under NO circumstance should you expose batteries to extreme heat or
fire as they may explode and cause injury.

NOTE: If you do not plan to use the meter for a month or more,
remove the battery and store it in an area that won’t be damaged by a
leaking battery.

DCM3-MAN P. 1