The BK Precision 390A digital multimeter (also known as a
multitester) is an average-sensing, auto-ranging meter for
measuring current, voltage, resistance, capacitance, frequency,
and temperature in electrical testing applications. The meter
comes with a set of detachable test leads. A K-type thermocouple
probe is included for taking temperature measurements. An audible
continuity sensor confirms a circuit conducts electricity, and a
diode test detects proper functioning of a circuit’s diodes. The
LCD shows readings in digits and on a 41-segment bar graph. It
displays the present measurement or the highest or lowest reading
in a session, for tracking sudden changes in readings. The
relative mode stores a reading in memory to use as a zero point
for subsequent readings so that multiple readings can be
compared. The peak maximum or minimum function records
instantaneous peak values for current and voltage. 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. An alarm sounds when
the test leads are connected to the wrong jack for the
measurement being taken. A USB data port connects the meter to a
computer (USB cable and software are included). The unit
automatically turns off after 30 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.
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. When turned on, the meter is
in auto-ranging mode and automatically selects the correct
operating range for the property being measured. It can be
switched to manual-ranging mode, which allows the operator to
choose the appropriate operating range. 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) input
20 amp
Maximum direct current (DC) input
20 amp
Maximum AC voltage input
750 volts (V)
Maximum DC voltage input
1,000V
Maximum resistance detected
40 megaohms
Maximum capacitance detected
40 millifarads (mF)
Maximum frequency detected
40 megahertz (MHz)
Temperature measurement range
-50 to 1300 degrees C (-58 to 2372 degrees F)
Power supply
9V battery (one, installed)
Standards met
European Conformity (CE) marked; Underwriters Laboratory listed;
International Electrotechnical Commission (IEC) safety standard
61010-1
Weight
320 g/11.3 oz.
Dimensions
198 x 90 x 40 mm/7.8 x 3.5 x 1.57 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 390A average-sensing digital multimeter
* (1) Set test leads
* K-type thermocouple probe
* USB data cable
* Software
* 9V battery (installed)
* Spare fuse
* Instructions
- Digital multimeter measures current, voltage, resistance, capacitance, frequency, and temperature.
- Average-sensing meter provides accurate readings when measuring linear loads where the current or voltage has an undistorted waveform.
- Includes K-type thermocouple probe for taking temperature measurements.
- Audible continuity sensor confirms a circuit conducts electricity, and diode test detects proper functioning of a circuit’s diodes.
- Meets International Electrotechnical Commission (IEC) safety standard 61010 and is certified for Category III installations up to 1,000V.