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Related Manuals for Gossen MetraWatt MAVOWATT 4
Summary of Contents for Gossen MetraWatt MAVOWATT 4
- Page 1 Operating Instructions MAVOWATT 4 ® 3-348-721-02 Multifunction Power Meter 5/4.17...
- Page 2 Figure 1 GMC-I Messtechnik GmbH...
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Page 3: Function Switch
Operating controls 1 Connection terminals Current I* (1), I (3) Voltage L1 (2), L2 (5), L3 (8) 2 Mirror scale 3 Mechnical zero adjuster 4 Selector switch for voltage ranges 50 V / 100 V / 250 V / 500 V 5 Selector switch for current ranges 0.25 A /1 A /5 A / 25 A 6 Function switch... -
Page 4: Table Of Contents
Contents Safety precautions ..............5 Application .................6 Getting started ................7 Description of the operating controls ............7 Installing the batteries ................7 Mechanical zero check ................7 Battery test ....................8 Measurement ................8 Notes on measurements ................8 Connection circuitries ................10 Measured results ..................13 Internal consumption of the power meter and its influence on the accuracy 15 Voltage and current measurement ............16 4.5.1 Voltage measurement ................16 4.5.2 Current measurement ................17... -
Page 5: Safety Precautions
We confirm this with the CE marking. The relevant declaration of conformity can be obtained from GMC-I Messtechnik GmbH. The multi-function power meter MAVOWATT 4 is constructed and tested in compliance with the safety rules of DIN VDE 0410 /IEC 414 and VDE 0411-1/EN 61010-1/IEC 61010-1. -
Page 6: Application
AC systems and on three-wire, three- phase systems of balanced load. In addition, the MAVOWATT 4 power meter can be used to directly measure current and voltage on DC and single-phase AC systems. Under consideration of correction factors, it is also possible to use the meter for reactive power measurements on three-phase systems of balanced load and also for interlinked voltages. -
Page 7: Getting Started
Getting started 3.1 Description of the operating controls There are five connection terminals (1, figure 1), arranged on the front of the power meter, two for current connection with the markings I* (1) and I (3) and three for voltage connection with the markings L1 (2), L2 (5) and L3 (8). -
Page 8: Battery Test
4.1 Notes on measurements ➭ Prior to connecting the meter, check according to which of the cir- cuitries shown in the following section the MAVOWATT 4 is to be connected. ➭ Find out whether direct connection of current path and voltage... - Page 9 ➭ Prior to measuring, always set the selector switch for the current ranges and that for the voltage ranges to the highest range. Make sure that the set nominal values are never exceeded by more than 1.2 times. ➭ For power measurements on DC and single-phase AC systems, set the function switch to the "...
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Page 10: Connection Circuitries
4.2 Connection circuitries Current and voltage input takes place on the meter via connectors which are suited for both plugging (banana plugs) and as terminals (e.g. cable lugs). The current path is run to the two connectors I* (1) and I (3), the voltage path to connectors L1 (2), L2 (5) and L3 (8). For DC current and for single-phase AC systems, the voltage must be applied to L1 (2) and L2 (5), for three-wire, three-phase systems (with- out neutral conductor) to L1 (2), L2 (5) and L3 (8). - Page 11 Active power and power factor measurement on single-phase AC systems Direct connection: Connection via current transformer: (L2) (L2) P (W) = I · U · cos P (W) = I · U · cos = · c = · c ·...
- Page 12 Active power and power factor measurement on three-wire, three-phase systems, balanced load Direct connection: P (W) = · I · U · cos = · c Connection via current and voltage Connection via current transformer: transformer: · I · U · cos P (W) = P (W) = ·...
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Page 13: Measured Results
Reactive power measurement on three-wire, three-phase systems of balanced load It is easy to determine the reactive power on three-wire, three-phase systems of balanced load. Set the function switch to the " " posi- tion. To obtain the reactive power, multiply the found value (pointer deflection x scale factor) by the factor of With a connection according to the following wiring diagram and a positive indication, the measured reactive power is inductive. - Page 14 Example 1: Direct connection of the meter for single-phase AC systems Selected nominal current range Selected nominal voltage range 100 V a) Function switch in position „ ” Reading scale according to table 0 ... 500 Value read off the scale e.g.
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Page 15: Internal Consumption Of The Power Meter And Its Influence On The Accuracy
4.4 Internal consumption of the power meter and its influence on the accuracy The MAVOWATT 4 power meter needs a certain amount of energy for the presentation of measured values. Due to the internal meter consumption, the measured value always includes an error. In most cases –... -
Page 16: Voltage And Current Measurement
4.5 Voltage and current measurement Even if the meter is connected for a power measurement, you can use the power meter to measure voltages and currents on both DC systems and single-phase AC systems and/or three-wire, three-phase systems of balanced load. For DC and single-phase AC systems, the voltage must be applied to L1 (2) and L2 (5). -
Page 17: Current Measurement
4.5.2 Current measurement ➭ Set the function switch to the I and/or I~ position and the selec- tor switch for the current ranges to the range corresponding to the measured value. The selector switch for the voltage ranges may be set to any position. -
Page 18: Specifications
Specifications Measuring ranges for DC and single-phase AC systems Nominal Nominal Nominal Factor c at scale division current voltage power 0...100 0...250 0...500 12.5 0.05 62.5 0.25 1250 2500 1250 2500 6250 12500 Measuring ranges for three-wire, three-phase systems, balanced load Nominal Nominal Nominal... - Page 19 Nominal Nominal Nominal Factor c at scale division voltage power current 0...100 0...250 0...500 1000 1000 2500 5000 2500 5000 12500 25000 Measuring ranges for DC and AC voltage for DC and AC voltage Nominal Factor c at scale division Nominal Factor c at scale division voltage...
- Page 20 Inputs Voltage path Nominal voltage U 50 V / 100 V / 250 V / 500 V Input resistance R 1 M Current path Nominal current I 0.25 A / 1 A / 5 A / 25 A Input resistance R 8 m...
- Page 21 Current 0 ... 1.2 · I for current measurement: 0 ... 1.0 · I for power factor measurement: 0 ... 1.2 · I / 25 A : 0.3 ... 1.0 · I cos = 0 ... 0.866 ... 1 Power factor cos ...
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Page 22: Maintenance
Electromagnetic Compatibility EMC Interference Immunity and Emission EN 61326 Mechanical Design Display Moving-coil movement Scale length 96 mm Protection type IP 50 per VDE 0470 Partl 1 Dimensions 110 mm x 181 mm x 62 mm Weight approx. 0.8 kg The measurement is independent of the position of the selector switch for the voltage ranges. - Page 23 The use of repaired fuses or short-circuiting of the fuse holder is prohibited. Device Return and Environmentally Compatible Disposal The MAVOWATT 4 is a category 9 product (monitoring and control instrument) in accordance with ElektroG (German Electrical and Electronic Device Law). This device is subject to the RoHS directive.
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Page 24: Repair And Replacement Parts Service
Repair and Replacement Parts Service Calibration Center * and Rental Instrument Service When you need service, please contact: GMC-I Service GmbH Service Center Thomas-Mann-Straße 20 90471 Nürnberg • Germany Phone +49 911 817718-0 +49 911 817718-253 E-Mail service@gossenmetrawatt.com www.gmci-service.com This address if for Germany only. Abroad, our representatives or establishments are at your disposal.
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