Gossen Metrawatt Metrahit 29S

Gossen Metrawatt Metrahit 29S

Status	in progress
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 similiar to the Metrahit 28S, but has additional energy measurement and data logging capabilities. While the functions common with the Metrahit 28S are expected to work, the additional features are not implemented yet.

Hardware

• Power supply:
  • Battery: 2x 1,5 V IEC R 6, IEC LR 6 or corresponding NiCd rechargeable batteries
  • External power supply NA5/600 by Gossen Metrawatt, 5V, 600 mA (newer version)
• 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]

Measurement functions and ranges

Measurement function	Range	Resolution	Accuracy	sigrok result	Remarks
V=	300 mV	1 μV	±(0,02% + 0,010% + 5)	mq V, unit V, mqflags DC
	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
	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.
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.