Gossen Metrawatt Metrahit 27I

Gossen Metrawatt 27I

Status	planned
Source code	gmc_mh_1x_2x
Counts	31000
IEC 61010-1	CAT II 600 V
Connectivity	Infrared (RS232)
Measurements	voltage, resistance, temperature, diode, continuity
Features	autorange, data hold, backlight, insulation measurement
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) connectivity. It supports milliohm and insulation (megaohm) measurements.

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
• Fuse:
  • FF (UR) 1,6 A/1000 V AC/DC (10 kA) 6,3 mm x 32 mm

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 -
	30 mΩ	0.001 mΩ	0.5% + 10
	300 mΩ	0.01 mΩ		"
mΩ@200 mA	30 mΩ	0.01 mΩ	0.25% + 10	mq Res., unit Ω, mqflags -
	300 mΩ	0.01 mΩ		0.5% + 10
	3 Ω	0.1 mΩ			"
	30 Ω	1 mΩ		"
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	0.01 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	±(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.
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. 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.