Gossen Metrawatt Metrahit 27I

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Gossen Metrawatt 27I
Status planned
Source code gmc_mh_1x_2x
Counts 31000
IEC 61010-1 CAT II 600 V
Connectivity Infrared (RS232/USB)
Measurements voltage, resistance, temperature, diode, continuity
Features autorange, data hold, backlight, insulation measurement, data logging
Website [1]

Please note: This page is a work in progress and still partly incorrect.

The Gossen Metrawatt Metrahit 27I is a 3100/31000 counts 600 V CAT II handheld digital multimeter with IR (RS232/USB) connectivity. It supports milliohm and insulation (megaohm) measurements and has data logging capabilities.

There are two versions of this device, an older one with yellow rotary switch and a newer one with red rotary switch. They also have different power supply connectors.

Hardware

  • Power supply:
    • Battery: 3x 1,2 V NiMH rechargeable batteries
    • External power supply NA HIT 27 (Art. Z218J) by Gossen Metrawatt, 5V, 600 mA (newer version)
  • Fuse:
    • FF (UR) 1,6 A/1000 V AC/DC (10 kA) 6,3 mm x 32 mm

Photos

Measurement functions and ranges

Measurement function Range Resolution Accuracy sigrok result Remarks
V= 3 V 100 μV ±(0.1% + 10) mq V, unit V, mqflags DC
30 V 1 mV ±(0.1% + 5) "
300 V 10 mV "
600 V 100 mV "
V≈ 3 V 100 μV ±(0.2% + 10) mq V, unit V, mqflags AC
30 V 1 mV "
300 V 10 mV "
600 V 100 mV "
mΩ@1A 3 mΩ 0.001 mΩ ±(1% + 10) mq Res., unit Ω, mqflags - 4-wire Kelvin measurement
30 mΩ 0.001 mΩ ±(0.5% + 10) " "
300 mΩ 0.01 mΩ " "
mΩ@200 mA 30 mΩ 0.01 mΩ ±(0.25% + 10) " "
300 mΩ 0.01 mΩ " "
3 Ω 0.1 mΩ " "
30 Ω 1 mΩ " "
Ω 300.00 Ω 1 mΩ ±(0.1% + 10) " ZERO with yellow button
3.0000 kΩ 10 mΩ ±(0.1% + 5) " "
30.000 kΩ 100 mΩ "
300.00 kΩ 1 Ω "
3.0000 MΩ 10 Ω "
30.000 MΩ 100 Ω ±(1.5% + 10) "
30 MΩ 10 kΩ ±(2% + 10) " Test voltage selectable 50/100/250/500 V
300 MΩ 100 kΩ " "
3 GΩ 1 MΩ ±(2% + 10) " "
Cont. 310 Ω 100 mΩ ±(1% + 5) mq Res., unit Ω, mqflags - Signal < about 10 Ω
Diode 3 V 100 µV ±(1% + 5) mq V, unit V, mqflags DC,DIODE
Hz 300.00 Hz 0.01 Hz ±(0.05% + 5) mq Freq., unit Hz, mqflags AC
3.000 kHz 0.1 Hz "
°C Pt100/Pt1000
–200.0 - +100.0 °C
0.1 °C ±(1 K + 5) mq Temp., unit °C, mqflags -
Pt100/Pt1000
+100.0 - 850.0 °C
±(0.5% + 5) "
Ni 100/Ni1000
-60-+180 °C
" Not tested yet due to lack of corresponding sensor.
°F " " " mq Temp., unit °F, mqflags - Details and ranges like °C.
Data Hold mqflags += HOLD Disabled while IR interface is active on  Matthias' test 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 Accuracy row was simplified, see manual for exact specs.

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