Difference between revisions of "Gossen Metrawatt Metrahit 27I"
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== Communication Protocol == | |||
The complete description is available on request from the manufacturer. | |||
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== Using the device with sigrok == | == Using the device with sigrok == | ||
The device is supported | The device is supported using a [[Gossen_Metrawatt#Metrahit_RS232 | RS232 interface]] by the driver gmc-mh-27x. The communication adaptor ''USB-Hit'' should work, too, but is untested. | ||
The device has got a device address that can be set to values from 0 to 15 in the setup. Using the device address 15 is recommended if only a single device is used, it sets a special mode with simplified addressing. The device address 0 sets a special mode where the multimeter does not send replies. It cannot be used with sigrok. | |||
If several devices of the Metrahit 27x family are used on the same RS232 interface using cascaded ''RS232'' interfaces, they need to be set to different device addresses from 1 to 15. In opposite to what the manual says, it seems that the device address 15 can be used, too. This feature is untested. | |||
Please contact [[User:Matthias Heidbrink | Matthias']] if you can test one of the untested features. | |||
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|- | |- | ||
| rowspan="3" | MΩ | | rowspan="3" | MΩ (Insulation) | ||
| 30 MΩ | | 30 MΩ | ||
| 10 kΩ | | 10 kΩ | ||
| rowspan="2" | ±(2% + 10) | | rowspan="2" | ±(2% + 10) | ||
| " | | " | ||
| | | Insulation measurement, test voltage selectable 50/100/250/500 V | ||
|- | |- | ||
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| | | | ||
| style="background: #ff0000; "| mqflags += HOLD | | style="background: #ff0000; "| mqflags += HOLD | ||
| | | ? | ||
|- | |- | ||
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| | | | ||
| style="background: #ff0000; "| mqflags += MIN | | style="background: #ff0000; "| mqflags += MIN | ||
| | | ? | ||
|- | |- | ||
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| | | | ||
| style="background: #ff0000; "| mqflags += MAX | | style="background: #ff0000; "| mqflags += MAX | ||
| | | ? | ||
|- | |- | ||
Revision as of 12:11, 31 May 2014
| Status | planned |
|---|---|
| Source code | gmc_mh_1x_2x |
| Counts | 31000 |
| IEC 61010-1 | CAT II 600 V |
| Connectivity | Infrared (RS232/USB) |
| Measurements | voltage, resistance, temperature, diode, continuity |
| Features | autorange, data hold, backlight, insulation measurement, data logging |
| 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/USB) connectivity. It supports milliohm and insulation (megaohm) measurements and has data logging capabilities.
There are two versions of this device, an older one with yellow rotary switch and a newer one with red rotary switch. They also have different power supply connectors.
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 (newer version)
- Fuse:
- FF (UR) 1,6 A/1000 V AC/DC (10 kA) 6,3 mm x 32 mm
Photos
Communication Protocol
The complete description is available on request from the manufacturer.
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 - | 4-wire Kelvin measurement |
| 30 mΩ | 0.001 mΩ | ±(0.5% + 10) | " | " | |
| 300 mΩ | 0.01 mΩ | " | " | ||
| mΩ@200 mA | 30 mΩ | 0.01 mΩ | ±(0.25% + 10) | " | " |
| 300 mΩ | 0.01 mΩ | " | " | ||
| 3 Ω | 0.1 mΩ | " | " | ||
| 30 Ω | 1 mΩ | " | " | ||
| Ω | 300.00 Ω | 1 mΩ | ±(0.1% + 10) | " | ZERO with yellow button |
| 3.0000 kΩ | 10 mΩ | ±(0.1% + 5) | " | " | |
| 30.000 kΩ | 100 mΩ | " | |||
| 300.00 kΩ | 1 Ω | " | |||
| 3.0000 MΩ | 10 Ω | " | |||
| 30.000 MΩ | 100 Ω | ±(1.5% + 10) | " | ||
| MΩ (Insulation) | 30 MΩ | 10 kΩ | ±(2% + 10) | " | Insulation measurement, test voltage selectable 50/100/250/500 V |
| 300 MΩ | 100 kΩ | " | " | ||
| 3 GΩ | 1 MΩ | ±(2% + 10) | " | " | |
| Cont. | 310 Ω | 100 mΩ | ±(1% + 5) | mq Res., unit Ω, mqflags - | Signal < about 10 Ω |
| Diode | 3 V | 100 µV | ±(1% + 5) | mq V, unit V, mqflags DC,DIODE | |
| 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 | ±(1 K + 5) | mq Temp., unit °C, mqflags - | |
| Pt100/Pt1000 +100.0 - 850.0 °C |
±(0.5% + 5) | " | |||
| Ni 100/Ni1000 -60-+180 °C |
" | Not tested yet due to lack of corresponding sensor. | |||
| °F | " | " | " | mq Temp., unit °F, mqflags - | Details and ranges like °C. |
| Data Hold | mqflags += HOLD | ? | |||
| MIN | mqflags += MIN | ? | |||
| MAX | mqflags += MAX | ? |
The Accuracy row was simplified, see manual for exact specs.
The column "sigrok result" contains in short form what the driver generates for the resp. data type.