BK Precision 881 Instruction Manual

INSTRUCTION MANUAL

MANUAL DE INSTRUCCIÓNES

In-Circuit ESR & DCR Cap Tester
Model 881

MEDIDOR DE RESISTENCIA ESR&DSR DE
CAPACITORES
MODELO 881

2

SAFETY GUIDELINES

WARNING

An electrical current of over 10 milliamps passing through the heart
will stop most human hearts. Voltage of as low as 35 Volts dc or ac
rms should be considered hazardous since it can produce lethal
current under certain conditions. Be sure to observe the following
safety precautions:

1. There are no high voltages in the Cap Tester, but the equipment

under test usually contains hazardous high voltage. Always follow
the safety recommendations of the manufacturer of your
equipment.

2. Some equipment may be wired as a "hot chassis" type; equipment

using two-wire power plugs are always suspect and it may even
include those with polarized plugs. Never touch chassis of "hot
chassis" type equipment to avoid the possibility of a serious,
possibly fatal electrical shock.

3. Don't expose yourself needlessly to high voltage; only remove

housings and covers when necessary.

4. Familiarize yourself with the equipment being tested and the

location of its high voltage points. However be aware that high
voltage may appear at unexpected points in defective equipment.

5. Never work alone. Someone should be nearby to render aid if

needed. Training in CPR (Cardio-pulmonary resuscitation) is
highly recommended.

3

SPECIFICATIONS

Specifications

Open circuit probe voltage 15mV pp (typical)
Output test frequency 100 KHz sine wave (typical)

Measures ESR

ESR range ohms 0.1 – 30
(25 segment LED bar scale) Beeps from 1 to 5 beeps depending on
ESR of capacitor

Measures DCR

DCR range ohms 0.5 - 30 flashing
the LED

Power One 9V battery or

an external AC
adapter (9V DC
150mA 5.5mm x

2.1 mm center
pin+)

Power drain 10mA typical

Dimensions 2.1" x 3.6" x 6.0"

NOTE: Specifications and information are subject to change without

notice. Please visit www.bkprecision.com for the most current product
information.

4

CONTROLS AND INDICATORS

1. Power Switch - Power on or off

2. DCR Low Indicator - LED turns on when DCR low

3. Mode switch - Selects test modes "ESR" or

"DCR&ESR"

4. ESR or DCR Indicator - Indicate the ESR or DCR

5. Colored chart - The three-colored chart that show typical ESR

readings of good, fair, and bad capacitors depending
on their capacitance.

6. Square connector - Capacitance

7. Bat Low - Indicates battery condition.

8. AC Adapter Jack - 9V DC, 100mA center pin + adapter

input.

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