Gossen Metrawatt Metrahit 29S

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Gossen Metrawatt Metrahit 29S
Gmc metrahit 29s logo.png
Status supported
Source code gmc-mh-1x-2x
Counts 310000
IEC 61010-1 CAT III 1000 V, CAT IV 600 V (older version)
CAT III 600 V, CAT IV 300 V (newer version)
Connectivity Infrared (RS232/USB)
Measurements voltage, current, resistance, capacitance, temperature, diode, continuity
Features autorange, data hold
Website [1]

The Gossen Metrawatt Metrahit 29S is a 310000 counts 1000V CAT III/600 V CAT IV (older version) or 600V CAT III/300 V CAT IV (newer version) handheld digital multimeter with IR (RS232/USB) connectivity.

It is very similiar to the Metrahit 28S, but has additional energy measurement and data logging capabilities. While the device is detected and functions common with the Metrahit 28S are expected to work, some of the additional measurement functions are not implemented yet.

Currently energy measurement is supported by driver gmc-mh-1x-2x-rs232 only.

Hardware

  • Power supply:
    • Battery: 2x 1,5 V IEC R 6, IEC LR 6 or corresponding NiCd rechargeable batteries
    • External power supply NA4/500 by Gossen Metrawatt, 4.2 V, 500 mA (for older version)
    • External power supply NA5/600 by Gossen Metrawatt, 5 V, 600 mA (for newer version, 3-pin plug)
  • Fuse:
    • Current 300 mA: FF (UR) 1,6 A/1000 V AC/DC (10 kA) 6,3 mm x 32 mm
    • Current 3A/10A: FF (UR) 10 A/1000 V AC/DC (30 kA) 10 mm x 38 mm
      A 16A fuse described in older versions of the manual is wrong [2]!

Photos

Measurement functions and ranges

Measurement function Range Max. Resolution Accuracy sigrok result Remarks
V= 300 mV 1 μV ±(0,02% + 0,010% + 5) mq V, unit V, mqflags DC Accuracy with ZERO; resolution from 2 1/2 to 5 1/2 digits depending on menu rAtE (min. 0.0005 s in storage mode)
3 V 10 μV ±(0,02% + 0,005% + 5) " "
30 V 100 μV " "
300 V 1 mV " "
1000 V 10 mV " "
V≈ 300 mV 10 µV ±(0.5% + 30) (> 500 Digit)) mq V, unit V, mqflags AC,RMS Resolution from 2 1/2 to 5 1/2 digits depending on menu rAtE (min. 0.05 s)
3 V 100 μV ±(0.2% + 30) " "
30 V 100 μV " "
300 V 1 mV " "
1000 V 10 mV " "
V≃ 300 mV 10 μV ±(0.5% + 30) (> 500 Digit)) mq V, unit V, mqflags AC,DC,RMS
3 V 100 μV ±(0.2% + 30) "
30 V 100 μV "
300 V 1 mV "
1000 V 10 mV "
V db≈ -48 - 63 dB 0,01 dB ± 0.1 dB mq V, unit V, mqflags AC,RMS Actually the 5 AC ranges, see there for accuracy.
V db≈ rel -48 - 63 dB 0,01 dB ± 0,1 dB mq V, unit V, mqflags AC,RMS Actually the 5 AC ranges, see there for accuracy. To activate, press yellow button in dB mode, then do second measurement. Cannot be distinguished from non-rel measurement remotely.
A=  300.00 µA 1 nA 0.05% + 0.02% + 5 mq Curr., unit A, mqflags DC
3.0000 mA 10 nA 0.05% + 0.01% + 5 "
30.000 mA 100 nA 0.05% + 0.01% + 5 "
300.00 mA 1 µA 0.1% + 0.01% + 5 "
3.0000 A 100 µA 0.2% + 0.05% + 5 "
10.000 A 1 mA 0.2% + 0.05% + 5 "
A≃  300.00 µA 10 nA 0.5% + 30 mq Curr., unit A, mqflags AC,DC,RMS
3.0000 mA 100 nA "
30.000 mA 1 µA "
300.00 mA 10 µA "
3.0000 A 100 µA 0.7% + 30 "
10.000 A 1 mA 0.5% + 30 "
Ω 300.00 Ω 1 mΩ 0.05% + 0.01% + 5 mq Res., unit Ω, mqflags -
3.0000 kΩ 10 mΩ "
30.000 kΩ 100 mΩ "
300.00 kΩ 1 Ω "
3.0000 MΩ 10 Ω 0.1% + 0.02% + 5 "
30.000 MΩ 100 Ω 1% + 0.2% + 5 "
Ohm/Cont. 300 Ω 100 mΩ 1% + 3% mq Res., unit Ω, mqflags -
Diode/Cont. 300 mV 100 µV 0.2% + 3 mq V, unit V, mqflags DC,DIODE
Diode 3 V 100 µV 0.2% + 3 mq V, unit V, mqflags DC,DIODE
Cap. F 3.000 nF 1 pF 1.0% + 0.2 mq Cap., unit F, mqflags -
30.00 nF 10 pF "
300.0 nF 100 pF "
3.000 µF 1 nF "
30.00 µF 10 nF "
300.0 µF 100 nF ±(5.0% + 6) "
3.000 mF 1 µF "
30.00 mF 1 µF "
Hz≈, ≃ 300.00 Hz 0.001 Hz ±(0.05% + 1) mq Freq., unit Hz, mqflags AC,DC To activate in AC, press yellow button twice.
3.0000 kHz 0.01 Hz "
300.000 kHz 1 Hz "
°C Pt100/Pt1000
–200.0 - +100.0 °C
0.1 °C ±(0,5 K + 3) mq Temp., unit °C, mqflags -
Pt100/Pt1000
+100.0 - 850.0 °C
±(0.2% + 3) mq Temp., unit °C, mqflags -
K NiCr-Ni -270-+1372,0 °C ±(0.7% + 3) "
J Fe-CuNi -210 - +1200.0 °C ±(0.8% + 3) " Not tested yet due to lack of corresponding sensor.
°F " " " mq Temp., unit °F, mqflags - Details and ranges like °C.


W 1 mW 0.1 µW mq power, unit W, mqflags AC,DC,RMS Available in socket mA only. All W ranges implemented in driver gmc-mh-1x-2x-rs232 only currently!
10 mW 1 µW " "
100 mW 10 µW " "
1 W 100 µW " "
10 W 1 mW " Available in both sockets mA and A!
100 W 10 mW " "
1 kW 100 mW " "
10 kW 1 W " Available in socket A only!
VAR - - - mq power, unit TODO, mqflags - Reactive power. Details and 8 ranges like W. Not implemented yet!
VA - - - mq power, unit va, mqflags - Details and 8 ranges like W. Not implemented yet!
Event count mq V, unit V, mqflags AC,RMS,REL Counts events >= 2500 digits that last >=2s with a break >=2s. To activate, switch to voltage ACDC, press yellow button twice. Press up to 4 times to cycle parameters, press long to stop. See manual. Not useful remotely because the current measurement value is sent, not the counter.
Stop Watch 100 ns (Time data) Max. 100 Min. To activate, select a 3V-1000V≃ range manually, press yellow button, press AUTO for start/stop, DATA for reset. Using the stop watch delivers only voltage data and sometimes seems to bring the device into a mode where it even sends invalid data packets.
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.

Energy measurement functions missing yet.

The Accuracy row was simplified, see manual for exact specs. If the value contains three values, the middle value is % or range.

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