The BK Precision 388A digital multimeter (also known as a
multitester) is an average-sensing, manual-ranging meter for
measuring current, voltage, resistance, capacitance, and
frequency in electrical testing applications. The meter comes
with a set of detachable test leads. The logic test reports the
logic state of an electronic circuit. The meter measures the
forward current gain of NPN and PNP transistors. An audible
continuity sensor confirms a circuit conducts electricity, and a
diode test detects proper functioning of a circuit’s diodes. The
microamp function identifies current changes in flame detector
applications. A hold function keeps a reading on the display,
even after the meter has been disconnected. The maximum hold
function keeps the highest value for the session on the display.
An alarm sounds when the test leads are connected to the wrong
jack for the measurement being taken. The unit automatically
turns off after 45 minutes of nonuse to conserve battery life,
and a low-battery indicator signals when the meter's batteries
need to be replaced. The meter's body is made of molded rubber,
which helps protect it against damage from falls, impacts, and
abrasion. The meter has a built-in tilt stand for propping on a
flat surface, and a hanging strap is included for hands-free use.
This average-sensing , or average-responding, meter provides
accurate readings when measuring linear loads, such as standard
induction motors and incandescent lights, where the current or
voltage has an undistorted waveform. It is a manual-ranging meter
that requires the operator to choose the appropriate operating
range for the property being measured. The LCD has a 4,000-count
resolution, meaning it can display up to 3,999 units (3-3/4
digits) before the operating range needs to be changed. It meets
International Electrotechnical Commission (IEC) safety standard
61010 and is certified for Category III installations up to
1,000V, which covers items used with enclosed building circuit
installations (such as service panel parts, branch circuits, and
fixed installations that are connected directly to a building's
AC power supply).
Specifications
--------------
Maximum alternating current (AC) or direct current (DC) input20
ampMaximum AC voltage input750 volts (V)Maximum DC voltage
input1,000VMaximum resistance detected40 megaohmsMaximum
capacitance detected40 millifarads (mF)Maximum frequency
detected4 megahertz (MHz)Logic thresholdHi = 2.8 + or – 0.8V; Lo
= 0.8 + or – 0.5VTransistor gain measurement range0 to 1,000Power
supply9V battery (one, installed)Standards metEuropean Conformity
(CE) marked; Underwriters Laboratory listed; International
Electrotechnical Commission (IEC) safety standard
61010-1Weight400 g/14.1 oz.Dimensions198 x 90 x 44 mm/7.8 x 3.6 x
1.7 inches (H x W x D)
H is height, the vertical distance from the lowest to highest
point; W is width, the horizontal distance from left to right; D
is depth, the horizontal distance from front to back.
Multitesters (also called multimeters) are electrical test meters
that measure multiple properties of an electrical circuit, such
as current, voltage, resistance, capacitance, and continuity.
Available in handheld or benchtop models, multitesters diagnose
electrical problems in electrical equipment, wiring, and power
supplies. A variety of probes, clamps, and leads can be used to
connect the meter to a circuit or device. Multitesters display
information either in analog or digital form. Factors that
influence meter choice include the electrical properties to be
measured, the anticipated range of results, and the desired level
of protection against transient voltages. Safety ratings are
based on the International Electrotechnical Commission's (IEC)
standards for low-voltage test equipment. IEC 61010 delineates
four overvoltage installation categories. In general, a meter
with a category IV rating will provide more protection against
transient voltages than a meter with a lower category rating.
BK Precision manufactures test and measurement instruments for
research and development, production-line testing, and electronic
field service applications. The company, founded in 1951, is
headquartered in Yorba Linda, CA. It meets International
Organization for Standardization (ISO) standard 9001:2008 and is
compliant with Restriction of Hazardous Substances (RoHS) and
waste electronic and electrical equipment (WEEE) directives.
What's in the Box?
------------------
* BK Precision 388A average-sensing digital multimeter
* (1) Set test leads
* 9V battery (installed)
* Spare fuse
* Hanging strap
* Instructions
- Digital multimeter measures current, voltage, resistance, capacitance, and frequency.
- Average-sensing meter provides accurate readings when measuring linear loads where the current or voltage has an undistorted waveform.
- Logic test reports the logic state of an electronic circuit.
- Measures the forward current gain of NPN and PNP transistors.
- Meets International Electrotechnical Commission (IEC) safety standard 61010 and is certified for Category III installations up to 1,000V.