Gossen Metrawatt T-Com KMM2002

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Gossen Metrawatt T-Com KMM2002
Gmc kmm2002 logo.png
Status supported
Source code gmc-mh-1x-2x
Counts 3100 (31000)
IEC 61010-1 CAT II 1000 V
Connectivity Infrared (RS232)
Measurements voltage, current, resistance, capacitance, temperature, diode, continuity
Features autorange, data hold, bargraph, backlight
Website [1]

The Gossen Metrawatt T-Com KMM2002 is a 3100 counts handheld digital multimeter with IR (RS232) connectivity and insulation measurement (100 V). It seems to be an OEM version of the Metrahit 16T especially made for T-Com (Deutsche Telekom). Additional features seems to be a backlight and a 30 nF capacity range.

The resolution is one digit higher on the data interface.

Hardware

  • Battery: 9 V IEC 6 LR 61
  • Fuse: None! (not required, no internal amps ranges)
  • TODO.

Photos

  • With rubber sleeve

  • Front

  • Back

  • Inside

  • Inside, inner cover removed

  • Board details 1

  • Board details 2

Measurement functions and ranges

The specifications of the KMM2002 seem not to be available to the public. The following is taken from the specs of the Metrahit 16T which seems to be almost identical and the Metrahit 16I .

Measurement function Range Resolution Deviation sigrok result Remarks
V= 30 mV 10 μV ±(0.5% + 3) mq V, unit V, mqflags DC Input impendance >10 GΩ; not covered by autorange, use manual range
300 mV 100 μV ±(0.5% + 3) " "
3 V 1 mV ±(0.25% + 1) "
30 V 10 mV "
300 V 100 mV "
1000 V 1 V ±(0.35% + 1) "
V≈ 3 V 100 μV ±(1.0% + 3) (> 10 Digit) mq V, unit V, mqflags AC,RMS
30 V 100 μV "
300 V 1 mV "
1000 V 10 mV "
V≃ 3 V 100 μV ±(1.0% + 3) (> 10 Digit) mq V, unit V, mqflags AC,DC,RMS
30 V 100 μV "
300 V 1 mV "
1000 V 10 mV "
A≈ (clamp only)  30 A 10 mA ±(2.5% + 3) (>10 Digit) mq Curr., unit A, mqflags AC,DC,RMS Current clamp with 100 mV/A required, e.g. GMC WZ12B
100 A 100 mA "
Ω 30.00 Ω 10 mΩ ±(0.5% + 3) mq Res., unit Ω, mqflags -
300.0 Ω 100 mΩ "
3.000 kΩ 1 Ω ±(0.4% + 1) "
30.00 kΩ 10 Ω "
300.0 kΩ 100 Ω "
3.000 MΩ 1 kΩ ±(0.6% + 1) "
30.00 MΩ 10 kΩ ±(2.0% + 1) "
Ω Iso 100V 310 MΩ 100 Ω - 100 kΩ ±(3% + 2) mq Res., unit Ω, mqflags - Altogether 4 ranges with different resolution
Diode/Cont. 3.0000 V– 1 mV ±(0.25% + 1) mq V, unit V, mqflags DC,DIODE Diode and cont. are identical on this device, just without beeper for diode.
Cap. F 30.00 nF 10 pF ±(1.0% + 3) mq Cap., unit F, mqflags -
300.0 nF 100 pF "
3.000 µF 1 nF "
Hz= 300.0 Hz 0.01 Hz ±(0.1% + 3) mq Freq., unit Hz Communication protocol does not allow to differ AC and DC.
3.000 kHz 0.1 Hz "
30.00 kHz 1 Hz "
100.00 kHz 10 Hz " Device actually measures up to more than 160 kHz.
Hz≈ 300.0 Hz 0.01 Hz ±(0.1% + 3) mq Freq., unit Hz Communication protocol does not allow to differ AC and DC.
3.000 kHz 0.1 Hz "
30.00 kHz 1 Hz "
100.00 kHz 10 Hz " Device actually measures up to more than 160 kHz.
°C Pt100 –200.0 - +200.0 °C 0.1 °C 2 Kelvin + 5 mq Temp., unit °C, mqflags - °F temperature ranges accordingly, but not available via serial interface.
Pt100 +200.0 - +800.0 °C ±(1.0% + 5) "
Pt1000 –100.0 - +200.0 °C 2 Kelvin + 5 "
Pt1000 +200.0 - +800.0 °C ±(1.0% + 5) "
Event count Seems not to be present on data output.
Data Hold mqflags += HOLD Disabled while IR interface is active on  Matthias' device.
MIN mqflags += MIN Influences only display, via IR flag is set, but actual current value is delivered.
MAX mqflags += MAX Influences only display, via IR flag is set, but actual current value is delivered.

The column "sigrok result" contains in short form what the driver generates for the resp. data type.

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