Gossen Metrawatt METRAHIT ENERGY DC-POWER SET Offers

Measure everything you need with just this kit equipped for current, voltage, temperature, decibel level, and much more. Additionally, the handheld device offers remote control, an illuminated display, and built-in memory storage to help make all your checks flow smoothly.

Features

• RMS measurement with the following and more: V AC TRMS, V AC+DC TRMS 100 kHz with bandwidth, V DC, dB, Hz (V), Hz (A), Ω, μF, V diode, °F/C (TC/RTD)
• Power measurement (W, VAr, VA, PF): Active, reactive and apparent power with extreme values, power factor
• Energy measurement (Wh, VArh, VAh) active, reactive and apparent energy, mean power value with adjustable observation period and maximum value
• Mains quality analysis: Recording of over and under voltage, dips, swells, voltage peaks and transients in 0, 50 and 60 Hz systems
• Harmonic analysis: RMS values and distortion components up to the 15th harmonic at 16.7, 50, 60 and 400 Hz
• Crest factor (CF), conductivity (nS), low impedance (RSL), duty cycle (%), cable length (km)
• Triple display, display illumination can be activated for difficult lighting conditions
• Resolution: 60,000 digits (4 6/7 place)
• 1 kHz/-3 dB low-pass filter can be activated
• Direct current measurement from 10 nA to 10 A, 16 A intermittently
• Current measurement with current clamp transformers and sensors, transformation ratio is taken into account at the display
• Measurement data memory for up to 300,000 measured values
• Instrument is fully remote controllable without activating the rotary switch or changing current sockets

Power and energy measurement

A compact power meter for direct and alternating current in single-phase systems. The electrical circuit can be connected either directly, or via a current transformer. If a current transformer is connected to the multimeter (mA/A input), all current and power displays are represented with the correct value based upon the selected transformation ratio. Universal power measurement includes the following measuring functions: active, reactive and apparent power, power factor and energy. Beyond this, the mean power value can be generated over a specified time period (e.g. 15 minutes), and the corresponding maximum value can be recorded along with time of occurrence.

Systematic voltage quality analysis

Equipped with a function for acquiring and recording power disturbances which is unique amongst the handheld multimeters. It allows for simultaneous, continuous recording of voltage characteristics and event-triggered recording of the following disturbances:

• Under and over voltage with start time, duration and extreme value
• Under and over voltage of the half-period RMS value (dips and swells) with start time, as well as minimum and maximum values
• Momentarily exceeded values with a duration of greater than 1 ms (peak) with time of occurrence and maximum value
• Steep transients with a rise time of 0.5 to 5 ms within a range of 200 to 1000 V including time of occurrence, relative voltage value and the previous 1 ms instantaneous value

Harmonic analysis

In the current measurement (A) switch positions, harmonic analysis is performed approximately once per second using 32 sampling values per mains period (adjustable to 16.7, 50, 60 or 400 Hz). FFT (fast Fourier transformation) makes oscillations up to the 15th harmonic available to this end. These are used to calculate the RMS values of the fundamental harmonic (HD 1) and the individual higher harmonics (HD 2 to 15), as well as total harmonic distortion (THD). RMS values and harmonic components are displayed in each case (RMS values relative to the RMS value of the fundamental harmonic).

Convenient triple display

The momentary measured value and up to two additional values are displayed simultaneously, for example:

• Extreme value with date and time
• Frequency and RMS value of AC measuring voltage

Or in the case of power measurement:

• Momentary measured values of active power, voltage and current
• Maximum value for periodic power with date and time

User safety and overload protection

Dangerous alternating contact voltages of greater then 30 V and direct voltages of greater than 35 V are indicated visually. Overload protection safeguards the instrument in all measuring functions for up to 600 V. Voltages of greater than 600 V and currents of greater than 10 or 16 A are indicated acoustically. Dangerous contact voltages are indicated when the 1 kHz low-pass filter has been activated. FUSE appears at the display if the fuse for the current measuring input blows. Switching between high and low impedance measuring functions is disabled in the vent of dangerous contact voltage.

Three connector jacks with automatic blocking sockets (ABS)

All current ranges are implemented via a single connector jack which prevents any possibility of operator error. Auto-ranging is available in all current measuring ranges. Beyond this, the automatic blocking sockets prevent incorrect connection of the measurement cables, as well as selection of the wrong measured quantity. Danger to the user, the instrument and the device under test resulting from operator error is thus ruled out. Exceptions include switch positions W, Wh and A.

RMS value with distorted waveshape

The utilized measuring method allows for waveshape independent RMS measurement (TRMS AC and AC+DC) for voltage up to 100 kHz and current (up to 10 kHz and up to CF = 10).

Activatable filter for V AC measurement

A 1 kHz low-pass filter can be activated if required, for example when measuring motor voltage at electronic frequency converters. The input signal is checked by a voltage comparator for dangerous voltages as long as the low-pass filter is activated. A high voltage symbol appears at the display if dangerous voltage is present.

Measuring of 5 V square-wave signals

This function makes it possible to test circuits and transmission cables by measuring the frequency and the duty cycle of pulses with amplitudes of 2 to 5 V and frequencies of 1 Hz to 1 MHz.

Fast acoustic continuity test

Testing for short circuiting and interruption is possible with the selector switch in the on position. The threshold value for acoustic signaling can be set to 1, 10, 20 to 500 Ω in 10 Ω steps.

Automatic/manual measuring range selection

Measured quantities are selected by means of a rotary switch and a function key. The measuring range is automatically matched to the measured values. The measuring range can also be selected and locked manually with a key.

Peak value monitoring for automatic and manual measuring range selection

The peak value is measured in addition to RMS measurement in the V/A DC, AC and AC+D functions, as well as for power measurement. If the peak value exceeds the valid range of the corresponding measuring path, this instrument is switched up one range, even if the displayed RMS measured value has not yet reached the threshold value. If the momentary measuring range is manually locked, (-)OL appears to indicate the peak value.

This assures that measurement only takes place in the permissible range for these functions (e.g. during measurement of a signal with a high crest factor or measurement of the DC component of high AC+DC voltages).

Measurement with current transformer clamps and sensors

Current transformer clamps and sensors are used for current measurements without interrupting the circuit under test, and for high amperages (>16 A). Offers convenient measurement with current clamps. The measured current value is automatically calculated for the user with the help of the adjustable clamp factor.

Automatic storage of measured values

The DATA function automatically saves the digitally displayed measured value after settling in. Acoustic signaling is also used to indicate whether the new measured value deviates from the initial reference value less or more than 0.1% of the measuring range.

Storage of minimum-maximum values

Comparable to the slave-pointer function of an analog instrument, the device saves the highest and lowest measured values after the Min-Max function has been activated or reset. These extreme values and their time stamps can be queried at the display.

Memory mode operation

Equipped with a quartz-movement synchronized measurement data memory (2048 kB), which has enough capacity for up to 300,000 measured values depending upon configuration. This allows for use of the instrument as an autonomous real-time data logger. Measurement data recording is executed either:

• In a time controlled fashion with an adjustable sampling interval within a range of 0.5 ms (for V/A DC only) to 9 hours
• Dependent upon measured value in the event of exceeded limit/delta value
• Automatically after stabilization of the measuring value
• As an individual measured value by pressing a key

Battery charging status - power saving circuit

The battery charging status is indicated by means of four symbols. The device is switched off automatically if the measured value remains unchanged for a period of between 10 and 59 minutes (adjustable), and if none of the controls are activated during this time (automatic shutdown is deactivated for power and energy measurement as well as for power quality analysis). Automatic shutdown can be disabled by switching the instrument to continuous operation. The standby mode for the infrared interface can be deactivated.

Protective cover for harsh conditions

Protected against damage in the event of impacts or dropping by means of a soft rubber cover with tilt stand and test probe holder. The rubber material also assures that it does not wander if it is set up on a vibrating surface.

Applications

• Electrical
• Measurement and testing
• Professional