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The BK Precision 5492B benchtop digital multimeter (also known as a multitester) is a true RMS, auto-ranging meter for measuring current, voltage, resistance, and frequency in electrical testing and manufacturing applications and for teaching electrical engineering principles. The meter comes with a set of detachable test leads. The meter measures 2- and 4-wire resistance, for a range of accuracy. An audible continuity sensor confirms a circuit conducts electricity, and a diode test detects proper functioning of a circuit’s diodes. The meter also measures period. The meter s internal memory saves up to 10 measurement settings for future recall. The meter s internal buffer can store up to 512 readings and can use the stored data to provide statistical information such as standard deviation and minimum, maximum, and average readings, for tracking measurement trends and sudden changes in readings. The user can set high and low limits for pass/fail testing. The meter can also express AC and DC voltage in decibels (dB), the power ratio of decibels to milliwatts (dBm), and percent of the reading relative to a preset reference value. The math mode manipulates readings according to the formula mx + b, where m and b are user-entered constants for scale factor and offset, respectively, and x is the actual reading as would be normally displayed. The relative mode stores a reading in memory to use as a zero point for subsequent readings so that multiple readings can be compared. A hold function keeps a reading on the display, even after the meter has been disconnected. The user has a choice of slow, medium, or fast measurement rate; the faster the rate, the less accurate the measurements. USB and RS-232 interfaces connect the meter to a computer for data transfer and remote operation (cable included). Triggers can be set to respond to measurement, bus, front panel, and external inputs.
This true RMS (root mean square) 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, or nonlinear loads, such as electronic devices or motors, where the current or voltage has a distorted 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 120,000-count resolution, meaning it can display up to 119,999 units (5-1/2 digits) before the operating range needs to be changed. It meets International Electrotechnical Commission (IEC) safety standard 61010 and is certified for Category I installations up to 1,000V (which covers protected electrical equipment such as small household appliances) and Category II installations up to 300V (which covers large household appliances and devices connected to a fixed power supply, such as refrigerators and air conditioners).
| Maximum alternating current (AC) input | 12 amp |
| Maximum direct current (DC) input | 12 amp |
| Maximum AC voltage input | 750 volts (V) |
| Maximum DC voltage input | 1,000V |
| Maximum resistance detected | 120 megaohms |
| Maximum frequency detected | 1 megahertz (MHz) |
| Period measurement range | 1 microsecond to 100 milliseconds |
| Maximum sample rate | 57 readings per second |
| Power requirement | 110/220V, + or - 10%; 50/60 Hz, + or - 5% |
| Standards met | International Electrotechnical Commission (IEC) safety standard 61010:2001; European Union EMC (EN) EN61326-1:2006, EN61326-2-1:2006 |
| Weight | 2.5 kg/5.51 lb. |
| Dimensions | 225 x 100 x 355 mm/8.85 x 3.93 x 13.97 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.
