Gossen Metrawatt Metrahit 14S

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Gossen Metrawatt Metrahit 14S
Status in progress
Source code gmc-mh-1x-2x
Counts 3100
IEC 61010-1 CAT III 1000 V, CAT IV 600 V
Connectivity Infrared (RS232)
Measurements voltage, current, resistance, capacitance, temperature, diode, continuity
Features autorange, data hold, bargraph

The Gossen Metrawatt Metrahit 14S is a 3100 counts handheld digital multimeter with IR (RS232) connectivity.

It is expected to work with the driver gmc-mh-1x-2x-rs232, but unsupported due to lack of a test device.

This page is a work in progress, information incomplete and possibly inaccurate!


Measurement functions and ranges

Measurement function Range Resolution Accuracy sigrok result Remarks
V= 30.00 mV 10 μV ±(0.5% + 3) mq V, unit V, mqflags DC
300.0 mV 100 μV "
3.000 V 1 mV ±(0.25% + 1) "
30.00 V 10 mV "
300.0 V 100 mV "
1000 V 1 V ±(0.35% + 1) "
V≈ 3.000 V 100 μV ±(0.75% + 2) "
30.00 V 100 μV "
300.0 V 1 mV "
1000 V 10 mV "
A=  300.0 µA 100 nA ±(1.0% + 5) mq Curr., unit A, mqflags DC Disabled on power on, see below.
3.000 mA 1 µA ±(1.0 + 2) " Disabled on power on, see below.
30.00 mA 10 µA ±(1.0% + 5) "
300.0 mA 100 µA ±(1.0% + 2) "
3.000 A 1 mA ±(1.0% + 5) " Disabled on power on, see below.
10.00 A 10 mA ±(1.0% + 2) "
A≈ 3.000 mA 1 µA ±(1.5% + 2) mq Curr., unit A, mqflags AC,DC,RMS
300.0 mA 100 µA "
10.00 A 10 mA "
Ω 30.00 Ω 10 mΩ mq Res., unit Ω, mqflags -
300.0 Ω 100 mΩ "
3.000 kΩ 1 Ω "
30.00 kΩ 10 Ω "
300.0 kΩ 100 Ω "
3.000 MΩ 1 kΩ "
30.00 MΩ 10 kΩ "
Diode/Cont. 3.000 V– 1 mV mq V, unit V, mqflags DC,DIODE Diode and cont. are identical on this device, just without beeper for diode.
°C Pt100 –200.0 - +200.0 °C 0.1 °C 2 Kelvin + 5 mq Temp., unit °C, mqflags -
Pt100 +200.0 - +850.0 °C ±(1.0% + 5) "
Pt1000 –100.0 - +200.0 °C 2 Kelvin + 2 "
Pt1000 +200.0 - +850.0 °C ±(1.0% + 2) "
Data Hold mqflags += HOLD Disabled while IR interface is active.
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.

To enable the ranges 300.0 µA, 3.000 mA and 3.000 A DC, switch function selector to circle with dot symbol and press yellow button. Wait until auto calibration of these ranges is finished ("CAL" in display disappears). After that the ranges are available in the mA resp. A function until multimeter powered off automatically or manually.

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