Gossen MetraWatt METRAHIT 30M Operating Instructions Manual
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Gossen MetraWatt METRAHIT 30M Operating Instructions Manual

Precision digital multimeter
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Operating Instructions
METRAHIT⏐30M
3-348-978-02
Precision Digital Multimeter
9/3.15

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Summary of Contents for Gossen MetraWatt METRAHIT 30M

  • Page 1 Operating Instructions METRAHIT⏐30M 3-348-978-02 Precision Digital Multimeter 9/3.15...
  • Page 2 LCD display, see page 3 for description MENU/ON|OFF ↵ Menu Operating Mode : Entry acknowledgment (ENTER or AVE/MIN|MAX key for storage of MIN or MAX values, as well as for displaying time since beginning of recording Menu Operating Mode selection of individual parameters, reverse flux direction, increase values MAN|AUTO key for manual measuring range selection...
  • Page 3 DC AC MANDATA MIN MAX t EVENTS kΩ MΩ I u F ZERO MENU FULL REM FILT Digital Display Symbols Digital display with decimal place and polarity Continuous operation Manual measuring range selection MIN value storage MAX value storage Selected current and voltage type Unit of measure Filter active Message: measurement value memory is full...

  • Page 4: Table Of Contents

    Table of Contents Page Safety Features and Precautions ........5 Initial Start-Up ..............6 Selecting Measuring Functions and Ranges ....7 Automatic Measuring Range Selection ........ 7 Manual Measuring Range Selection (Quick Measurements) .. 7 Digital Display (LCD) ............7 Minimum and Maximum Value Storage “MIN/MAX”...

  • Page 5: Safety Features And Precautions

    Safety Features and Precautions You have selected an instrument which provides you with a high level of safety This instrument fulfills the requirements of the applicable Euro- pean and national EC guidelines. We confirm this with the CE marking. The relevant declaration of conformity can be obtained from GMC-I Messtechnik GmbH.

  • Page 6: Initial Start-Up

    Errors and Extraordinary Strains If it may be assumed that the instrument can no longer be operated safely, it must be removed from service and secured against further use. Safe operation can no longer be relied upon • if the instrument demonstrates visible damage, •...

  • Page 7: Selecting Measuring Functions And Ranges

    Selecting Measuring Functions and Ranges Automatic Measuring Range Selection The multimeter is equipped with automatic measuring range selection. This automatic feature is active as soon as the instrument is switched on, and automatically selects the measuring range which provides optimum resolution. The voltage measuring range selected in the V AC selector switch position remains active after switching to frequency measurement “Hz”, and automatic measuring range selection...

  • Page 8: Minimum And Maximum Value Storage "Min/Max" With Time Stamp

    Minimum and Maximum Value Storage “MIN/MAX” with Time Stamp Minimum and maximum measurement values can be stored to memory with the MIN/MAX function. The most important appli- cation for this function is the determination of minimum and maximum values during long-term observation of measure- ment values.

  • Page 9: Zero Balancing (For V, Ma , Ω And °C)

    Zero Balancing (for V , mA , Ω and °C) Ð Select the desired measuring range with the MAN|AUTO key. Ð 2-Wire Resistance Measurement, Current Measurement or Temperature Measurement with Pt100 or Pt1000: short-circuit the positive and negative poles of sockets „mAΩ...

  • Page 10: Current Measurement

    Current Measurement Ð First disconnect supply power to the measuring circuit or the load component, and discharge any capacitors which may be present. Ð Set the selector switch to “mA”. After this selection has been made with the rotary switch, the DC current mode is always active.

  • Page 11: Resistance Measurement

    Resistance Measurement Resistance measurements can be performed for devices with high inductive or capacitive components such as motors, transformers, coils etc. Ð Be certain that the device under test is voltage-free. Extraneous voltages distort measurement results! Ð Set the rotary switch to “Ω ”...

  • Page 12: Temperature Measurement

    Temperature Measurement 10.1 Temperature Measurement with Pt100 and Pt1000 Ð Enter the type of sensor to be used (Pt100 or Pt1000) in the menu mode:   SEnSor ↵ Pt 100 Pt 1000 ↵ rAtE Ð Set the selector switch to “°C ”...

  • Page 13: Temperature Measurement With Thermocouple

    í Heat or cool the sensor to a known temperature (e.g 0 °C in ice water), and measure the sensor’s resistance with the Ω function using the 1 kΩ range for Pt100 sensors, and the 10 kΩ range for Pt1000 sensors. Cable resistance is equal to the difference between the setpoint (100 Ω...

  • Page 14: Storing Measurement Values To Memory

    Storing Measurement Values to Memory The instrument is equipped with a quartz-movement synchro- nized measurement-value memory (128 kB), which has suffi- cient capacity for 30000 measurement values. Data can be stored to intermediate memory, or transmitted directly to a PC. Memory content can only be read out with the help of a PC, an ...
  • Page 15 Ð After the desired parameter has been selected, the various possible setting can be called up by activating the ↵ key. Ð The desired value can be selected by repeatedly activating  key. Ð Acknowledge with the ↵ key and return to operation in the measuring mode.

  • Page 16: Description Of Measurement Parameters And Memory Commands

    12.1 Description of Measurement Parameters and Memory Commands rAtE – Sampling Rate (storage or measuring rate) The sampling rate determines the interval, after which the respective measurement values are transmitted to the interface or the measurement value memory. The following sampling rates are possible: ...

  • Page 17: Selecting Interface Parameters

    For example: • Select and read out measuring parameters • Select measuring function and range • Start measurement • Read out measurement values (online readout with simultaneous measurement: shortest possible sampling period is 100 ms) The interface is always active if the instrument is switched on. 13.1 Selecting Interface Parameters Addr –...

  • Page 18: Characteristic Values

    Characteristic Values Resol. at Meas. Range Upper Limit Measuring Measuring Range Function 1200 000 120 000 12 000 0.1 μV 1 μV 10 μV 100 mV 1 μV 10 μV 100 μV 10 μV 100 μV 1 mV 100 μV 1 mV 10 mV 1 mV...
  • Page 19 Intrinsic Uncertainty at max. Resolution Overload Frequency at Reference Conditions Measuring Capacity Range ±(...% of rdg. + % of range) Range in Hz 4) 5) Value Duration 45 … 65 0.08 + 0.06 10 … 1 k 100 mV 0.005 + 0.0006 0.1 + 0.1 1 k …...
  • Page 20 Influence Variables and Effects Influence Measured Quantity / Influence Effect Influence Range Variable Measuring Range ppm/K 0 °C ... +21 °C 100 Ω ... 100 kΩ Temperature +25 °C ... 1 MΩ +40 °C 10 MΩ °C Influence Measured Quantity / Influence Range Influence Effect Variable...
  • Page 21 Reference Conditions Ambient +23 °C ±2 K Temperature 40 ... 60% Relative Humidity Measurement 45 ... 65 Hz Quantity Frequency Measurement sine Quantity Waveform 3 V ±0.1 V Battery Voltage 5 V ±0.2 V Power Pack Voltage Response Time After Manual Range Selection at max. Resolution Measured Quantity / Measured Quantity Response Time...
  • Page 22 Power Supply 2 AA size batteries Batteries alkaline manganese cells per IEC LR6 Service Life Measuring Function Power Service Life in Consumption in mA Hours (with 2.5 Ah alkaline manganese cells) V DC, mA DC, °C/°F V (AC + DC), mA (AC + DC) Transmission mode, sampling rate: 100 ms 9600 baud 19200 baud...
  • Page 23 Ambient Conditions − 5 °C ... +50 °C Operating Temp. −25 °C ... +70 °C (without batteries) Storage Temperature max. 75%, no condensation Relative Humidity allowed to 2000 m Elevation indoors, Deployment outdoors: only in the specified ambient conditions 5 min. Warm-Up Time Mechanical Design instrument: IP 50,...

  • Page 24: Maintenance - Recalibration

    Maintenance – Recalibration Attention! Disconnect the instrument from the measuring circuit before opening to replace batteries! 16.1 Batteries Note! Battery Replacement Stored measurement values are deleted when the battery is replaced. We recommend connecting the power pack, or uploading data to a PC with the help ...

  • Page 25: Power Pack

    16.2 Power Pack NA HIT 2X Use only the power pack for power supply to your instrument. The highly insulated cable assures safety for the operator, and the power pack provides for reliable electrical isolation. When a mains power pack is used, the batteries inside the instrument are disconnected automatically.

  • Page 26: Device Return And Environmentally Compatible Disposal

    16.5 Device Return and Environmentally Compatible Disposal The instrument 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. Furthermore, we make reference to the fact that the current status in this regard can be accessed on the Internet at www.gossenmetrawatt.com by entering the search term WEEE.

  • Page 27: Repair And Replacement Parts Service Calibration Center And Rental Instrument Service

    Repair and Replacement Parts Service Calibration Center * and Rental Instrument Service If required 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 is only valid in Germany. Please contact our representatives or subsidiaries for service in other countries.

  • Page 28: Product Support

    Product Support If required please contact: GMC-I Messtechnik GmbH Product Support Hotline Phone +49 911 8602-0 +49 911 8602-709 E-Mail support@gossenmetrawatt.com DAkkS Calibration Certificate Reprints If you need to order a reprint of the DAkkS calibration certifi- cate for your instrument, please include the ID number shown in the uppermost and lowermost fields of the red calibration seal.

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