Gossen Metrawatt Metrahit 28C

Gossen Metrawatt Metrahit 28C

Status	planned
Counts	310000
IEC 61010-1	CAT II 250 V/CAT I 600 V
Connectivity	Infrared (RS232/USB)
Measurements	voltage, current, resistance, capacitance, temperature, continuity
Features	autorange, data hold
Website	[1]

The Gossen Metrawatt Metrahit 28C is a 310000 counts 250 V CAT II/600 V CAT I handheld digital multimeter and calibrator with IR (RS232/USB) connectivity.

Hardware

• Power supply:
  • Battery: 3x 1,5 V IEC R 6, IEC LR 6 or corresponding rechargeable batteries
  • External power supply NA5/600 by Gossen Metrawatt, 5 V, 600 mA (proprietary 3-pin plug)
• Fuses:
  • F1: Current: F 500 mA/250 V 5 x 20 mm
  • F2: Current: F 500 mA/250 V 5 x 20 mm
  • F3: Calibrator: M 125 mA/250 V 5 x 20 mm

Measurement functions and ranges

Measurement function	Range	Max. Resolution	Accuracy	sigrok result	Remarks
V=	300 mV	1 μV	±(0.05% + 15)	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		"	"
	30 V	100 μV		"	"
	300 V	1 mV		"	"
	600 V	10 mV		"	"
V≈	300 mV	10 µV	±(0.5% + 30) (> 500 Digit))	mq V, unit V, mqflags AC, RMS	To activate set mode V Hz, press orange button once.
	3 V	100 μV	±(0.2% + 30)	"	"
	30 V	1 mV		"	"
	300 V	10 mV		"	"
	600 V	100 mV		"	"
A=	3.0000 mA	10 nA	0.05% + 15	mq Curr., unit A, mqflags DC
	30.000 mA	100 nA		"
	300.00 mA	1 µA		"
A≃	3.0000 mA	100 nA	0.5% + 30	mq Curr., unit A, mqflags AC,RMS	To activate set mode mA, press orange button once.
	30.000 mA	1 µA		"
	300.00 mA	10 µA		"
Ω	30.000 mΩ	0.01 mΩ	0.5% + 5	mq Res., unit Ω, mqflags -	4-wire Calvin measurement
	300.00 mΩ	0.1 mΩ		"	"
	3.0000 Ω	1 mΩ		"	"
	30.000 Ω	1 mΩ		"	"
	300.000 Ω	1 mΩ	0.07% + 20 (with ZERO)	mq Res., unit Ω, mqflags -
	3.00000 kΩ	10 mΩ	0.07% + 15	"
	30.0000 kΩ	100 mΩ		"
	300.000 kΩ	1 Ω		"
	3.00000 MΩ	10 Ω		"
	30.0000 MΩ	100 Ω	1.5% + 15	"
Ω/Cont.	300 Ω	100 mΩ	0.5% + 5	mq Res., unit Ω, mqflags -
Diode	3 V	100 µV	0.5% + 5	mq V, unit V, mqflags DC, DIODE	To active set mode Ω₂F, press orange button twice
Diode Zener	15 V	1 mV	1% + 5	mq V, unit V, mqflags DC, DIODE	To active set mode Ω₂F, press orange button three times.
Cap. F	3.000 nF	1 pF	1.0% + 5	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		"
Hz≈	300.00 Hz	0.1 Hz	±(0.05% + 5)	mq Freq., unit Hz, mqflags AC	To activate set mode V Hz, press orange button twice.
	3.0000 kHz	0.1 Hz		"
	100.000 kHz	10 Hz		"
°C/°F	Pt100 –200.0 - +850 °C	0.1 K	±(1 K)/±(0.8 K)/±(0.5 % + 3)	mq Temp., unit °C, mqflags -
	Pt1000 –200.0 - +850.0 °C		±(0.8 K)/±(0.5 % + 3)	"
	Ni100 -60 - +180.0 °C		±(0.5% + 3)	"
	Ni1000 -60 - +180.0 °C		±(0.5% + 3)	"
	B (Pt30Rh-Pt6Rh) +100.0 - +1820.0 °C		±(1 + 5K)/±(1 + 2K)	"
	E (NiCr-CuNi) -270.0 - +1000.0 °C		±(1 + 5K)	"
	J (Fe-CuNi) -210 - +1200.0 °C		±(0.8% + 5)	"
	K (NiCr-Ni) -250-+1372.0 °C		±(0.8% + 5)	"
	L (Fe-CuNi) -200.0 - +900.0 °C		±(0.8% + 5)	"
	N (NiCrSi-NiSi) -270.0 - +1300.0 °C		±(0.8% + 5)	"
	R (Pt13Rh-Pt) -50.0 - +1768.0 °C		±(1 + 2K)	"
	S (Pt10Rh-Pt) -50.0 - +1768.0 °C		±(1 + 2K)	"
	T (Cu-CuNi) -270 - +400.0 °C		±(0.8% + 5)	"
	U (Cu-CuNi) -200.0 - +600.0 °C		±(0.8% + 5)	"

The Accuracy row and °C/°F were simplified, see manual for exact specs.

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