Difference between revisions of "Gossen Metrawatt"
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There seem to be several "sub-modes". See description available from manufacturer on request. | There seem to be several "sub-modes". See description available from manufacturer on request. | ||
This mode is supported (incompletely) by the driver ''gmc-mh-2x-bd232'' using one of the interfaces . | This mode is supported (incompletely) by the driver ''gmc-mh-2x-bd232'' using one of the interfaces [[#Metrahit_BD232|BD232]] or [[#Metrahit_SI232-II|SI232-II]]. The interface [[#USB-Hit|USB-Hit]] might work, too, but is untested. | ||
Supported devices: ''Siemens B1105'' (Metrahit 28S). Other devices should work, too, but are untested. | Supported devices: ''Siemens B1105'' (Metrahit 28S). Other devices should work, too, but are untested. | ||
Revision as of 18:37, 12 February 2014
Gossen Metrawatt is a German manufacturer of professional and high-end test and measurement equipment, including multimeters.
This article tries to give an overview of the multimeters with interfaces for data exchange, OEM models and communication.
Company
Multimeters
One remark concerning device names: The manufacturer writes the name of the device series sometimes "METRAHit", sometimes METRAHIT or even METRA HIT, sometimes not even consistently for the same device. For simplicity it will be "Metrahit" here most of the time, other names alike.
Metrahit 1x series
| Gossen Metrawatt | Siemens OEM | Rishabh | Count | TRMS | Supported | Remarks |
|---|---|---|---|---|---|---|
| Metrahit 12S (GTM 2012 000 R0003) | Rishmulti 12S | 3100 | ||||
| Metrahit 13S (GTM 2013 000 R0003) | Rishmulti 13S | 3100 | ||||
| Metrahit 14A (GTM 2014 000 R0007) | B1102 7KB1102-8AA | 3100 | ||||
| Metrahit 14S (GTM 2014 000 R0003) | B1103 7KB1103-8AA | Rishmulti 14S | 3100 | |||
| Metrahit 15S (GTM 2015 000 R0003) | Rishmulti 15S | 3100 | ||||
| Metrahit 16S (GTM 2016 000 R0003) | B1104 7KB1104-8AA | Rishmulti 16S | 3100 | ● | ||
| Metrahit 16I (M216B) | 3100 | ● | ● | Multimeter and insulation tester 500/1000 V | ||
| Metrahit 16L | 3100 | ● | Seems to be a Metrahit 16I with additional duty cycle function | |||
| Metrahit 16T (M216A) | 3100 | ● | Multimeter and insulation tester 100 V telecom | |||
| Metrahit 16U (M216U) | 3100 | ? | Multimeter and insulation tester for symmetrical copper wire, very similar to 16T | |||
| Metrahit 18S (GTM 2018 000 R0003) | B1108 7KB1108-8AA | Rishmulti 18S | 31000 | ● | ● |
These multimeter can send data unidirectionally via IR/RS232 (Send Mode). It seems that the 3100 count types are actually 31000 count types that do not display the last digit, but can deliver it via the serial interface.
Currently the Metrahit 14A, 16I and 18S are supported by sigrok using the driver gmc-mh-1x-2x-rs232. The other devices should work, but are untested. See section Metrahit 1x/2x Send Mode for details. Please contact Matthias if you have one of these devices and can test it.
The devices are not available from Gossen Metrawatt any more, but it seems that a company in India named Rishab makes slightly redesigned versions of some models.
The Metrahit 1x series includes some more devices (Metrahit 15 and 16 without letter, Milliohm Meter Metrahit 17, some sold as ancestor brand ABB Metrawatt) that are unsupported because they do not have an IR interface.
Metrahit 2x Series
| Gossen Metrawatt | Siemens OEM | LEM ELMES/ HEME/NORMA OEM |
Dranetz brand | Count | TRMS | Remarks |
|---|---|---|---|---|---|---|
| Metrahit 22S (M222A) | Unigor 330 | 31000 | Signal Generator; Current measurement only with clamp | |||
| Metrahit 22M (M222B) | 31000 | Signal Generator; Like 22S + Integrated measurement data storage | ||||
| Metrahit 23S (M223A) | 31000 | Signal Generator; special 16A (unfused) range for used with measuring current transformers | ||||
| Metrahit 24S (M224A) | 31000 | Signal Generator | ||||
| Metrahit 25S (M225A) | B1102 7KB1102-8BA | Unigor 355 | 31000 | AC | Signal Generator | |
| Metrahit 26S (M226A) | 31000 | ● | Signal Generator | |||
| Metrahit 26M (M226B) | ● | Signal Generator; Like 26S + Integrated measurement data storage | ||||
| Metrahit 27EX (M227F) | Milliohm meter for explosive atmospheres | |||||
| Metrahit 27EX Airbus (M227G) | Milliohm meter for explosive atmospheres, special version approved by Airbus. | |||||
| Metrahit 27I (M227B) | B1107 B 7KB1107-8BA ? | DranTech PMIT | ● | Milliohm and Megaohm, insulation tester. Same device available as part of avionic kit 27AS (M227C). | ||
| Metrahit H+E Car (M227T) | ● | Special tester for Electro and Hybrid Cars. Milliohm and Megaohm, insulation tester. Seems to be a METRAHit 27I in different colors | ||||
| Metrahit 27M (M227A) | ● | Multimeter and Milliohmmeter | ||||
| Metrahit 28S (M228A) | B1105 7KB1105-8AA | Unigor 380 | 310000 | ● | ||
| Metrahit 28C (M231A) | 310000 | ● | Multimeter, Milliohmmeter + Calibrator | |||
| Metrahit 28C light (M232A) | (30000) | Calibrator; Only a signal generator, not a multimeter, added here just for completeness. | ||||
| Metrahit 29S (M229A) | B1106 7KB1106-8AA | Unigor 390 | PowerLogger 10 | 310000 | ● | Energy and power disturbance measurement functions, integrated memory. |
| Metrahit 30M (M230B) | DranTech ULTRA | 1200000 | ● | Laboratory multimeter; communication protocol not compatible with Metrahit 1x/2x devices! |
The Metrahit 2x series supports unidirectional (Send Mode) and bidirectional data exchange via IR.
Currently the Siemens B1105 (Metrahit 28S) is supported by two different drivers:
- gmc-mh-1x-2x-rs232: Send Mode
- gmc-mh-2x-bd232: Bidirectional Mode
See Communication Protocols for more details.
Please contact Matthias if you have one of the unsupported devices and can test it.
Metrahit Starline Series
The series of newer devices with only three sockets (only one socket for all current measurement ranges) is called Starline Series. The manufacturer sub-divides this further into an A Series, E Series and S Series, which does not make a big difference concerning communicating with the devices.
| Gossen Metrawatt | Siemens OEM | Dranetz brand | Count | Remarks |
|---|---|---|---|---|
| Metrahit X-Tra (M240A) | Siemens B1125 7KB1125-8AA | Drantech XTRA | 12000 | Teardown on EEVblog: 1 |
| Metrahit Outdoor (M240o) | DranTech Outdoor | 12000 | IP65; seems to be a more rugged, different-coloured flavour of the X-Tra | |
| Seculife Hit (M687A) | 12000 | Seems to be a white, "medical" version of the X-Tra | ||
| Metrahit EBase (M251A) | 60000 | |||
| Metrahit ESpecial (M252A) | 60000 | |||
| Metrahit ETech (M253A) | 60000 | Simular to Extra, but fewer functions. | ||
| Metrahit Extra (M250A) | 60000 | |||
| Metrahit Energy (M249A) | 60000 | Energy and power analysis functions; EEVblog: Teardown: 1 Battery measurement: 2 | ||
| Metrahit Ultra (M248A) | 310000 | Precision Multimeter | ||
| Metrahit Ultra BT (M248B) | 310000 | Precision Multimeter with additional Bluetooth interface | ||
| Metrahit Iso (M246B) | DranTech ISO | 30000 | Multimeter with insulation measurement 50/100/250/500/1000 V, 3,1 GΩ | |
| Metrahit Iso Aero (M246M) | 30000 | Multimeter with insulation measurement 10/50/100/250/500/1000 V, 3,1 GΩ | ||
| Metrahit T-Com (M246A) | 3100 | Multimeter with special functions for symmetrical copper wiring, insulation measurement 100V | ||
| Metrahit T-Com Plus (M246S) | 3100 | Like T-Com, some more functions. | ||
| Metracal MC (M245A) | 60000 | Multimeter and calibrator; older versions named Metrahit Multical. |
Metraport Series
| Gossen Metrawatt | Volkswagen OEM | Count | Remarks |
|---|---|---|---|
| Metraport 40S (M234D) | V.A.G 1526E | 30000 | Foldable multimeter; USB interface, resettable fuse |
Communication Hardware
Most Gossen Metrawatt multimeters having data communication support communicate unidirectionally or bi-directionally through the case using IR and proprietary communication adaptors. The advantage of this construction is that it allows a closed case without unnecessary holes (one model, the Metrahit Outdoor, even has IP65 protection!), the disadvantage is a need for special, expensive adaptors to convert this to common RS232 or USB. Please note that the IR is just serial data (?), not IrDA.
The Metrahit Ultra BT also supports Bluetooth.
Metrahit 1x/2x series
Metrahit RS232
IR→RS232 adaptor for unidirectional communication from the multimeter to the computer.
Works with Metrahit 1x and with Metrahit 2x devices in Send Mode.
RS232 parameters: 8192 (Metrahit 1x)/9600 Baud (Metrahit 2x), 6N1, DTR ON, RTS ON.
The communication speed of 8192 Baud and 6 data bits might not be supported by some operating systems and RS232-USB adaptors.
Not available any more.
RS232 IR→RS232 adaptor
With counterpart Metrahit 18S
Attached to Metrahit 18S
The adaptor contains just discrete components and ICs, no microcontroller.
Metrahit SI232
IR→RS232 adaptor for unidirectional communication from the multimeter to the computer and data storage.
Works with Metrahit 1x and with Metrahit 2x devices in Send Mode.
Up to six SI232 can be cascaded to communicate to the computer via a single RS232 interface. Up to 10 SI232 can be cascaded to measure offline synchronously.
128 kByte battery-buffered CMOS memory, up to about 100000 data sets.
Multimeter: 8192 Baud, 950 nm, 6N1.
RS232: 9600/19200/38400 Baud, 8N1.
Not available from Gossen Metrawatt any more. It seems that Rishab in India 1 still sells it as OEM product Rish SI232.
Metrahit BD232
IR↔RS232 adaptor allowing bidirectional communication between multimeter and computer.
Works with Metrahit 2x devices, including 30M.
Up to six BD232 can be cascaded to communicate to the computer via a single RS232 interface. When only Metrahit 2x multimeters are used, BD232 and SI232 adaptors can be mixed.
9600 Baud.
Matthias' experience is that this adaptor works as a replacement for a Metrahit RS232 with Metrahit 1x devices on some RS232 ports, but not on others.
Left side
Right side
Inside
Board bottom
Board top
The adaptor contains just discrete components and ICs, no microcontroller.
Metrahit SI232-II
IR↔RS232 adaptor allowing bidirectional communication between multimeter and computer and data storage.
Works with Metrahit 1x and Metrahit 2x devices.
128 kByte battery-buffered CMOS memory, up to about 100000 data sets.
Multimeter: 8192/9600 Baud, 950 nm, 8N1.
RS232: 9600/19200/38400 Baud, 8N1.
4-8 SI232-II (depending on multimeter types and baud rate) can be cascaded to communicate to the computer via a single RS232 interface. Up to 10 SI232-II can be cascaded to measure offline synchronously.
Not available any more.
USB-Hit
IR↔USB adaptor for Metrahit.
For Metrahit 2x/30M devices only.
Metrahit Starline Series
USB X-Tra
IR↔USB adaptor for the Starline Series devices.
Bluetooth
Bluetooth 2.1 + EDR, Class 2
For the Metrahit Ultra BT.
Communication Protocols
While the older devices MetraHit 1x-30M use proprietary protocols, the newer devices of the socalled Starline Series use a protocol close to SCPI. Descriptions of the communication protocols are available from the manufacturer.
Metrahit 1x/2x Send Mode
Proprietary binary protocol. Used for sending data from multimeter to PC.
This mode is supported by the driver gmc-mh-1x-2x-rs232 using the interface RS232 or SI232-II. The interface SI232 should work, too, but is untested.
Supported devices: Metrahit 14A, 16I, 18S and 28S (Siemens B1105). Other devices should work, too, but are untested.
Currently the following restrictions apply:
- Metrahit 29S energy measurement functions not implemented yet due to lack of a test device.
- 300 µA DC range untested.
Metrahit 2x Bidirectional Mode
Proprietary binary protocols. Used for bidirectional communication between computer and Metrahit 2x multimeters.
There seem to be several "sub-modes". See description available from manufacturer on request.
This mode is supported (incompletely) by the driver gmc-mh-2x-bd232 using one of the interfaces BD232 or SI232-II. The interface USB-Hit might work, too, but is untested.
Supported devices: Siemens B1105 (Metrahit 28S). Other devices should work, too, but are untested.
The following restrictions apply currently:
- Only one multimeter per RS-232 interface supported. Several multimeters on cascaded BD232 or SI232-II interfaces might be detected, but only one at a time can be used.
- Measured values are read one by one by polling. Depending on the multimeter and measurement function, this might cause loss of some values.
- Reading of data stored in multimeter or communication adapter memory not implemented yet.
- Setting of multimeter configuration not supported yet.
Metrahit 30M
The protocol is proprietary and seems to be quite different from the Metrahit 1x/2x series although communication can use some of the same IR↔Serial adaptors (at least BD232, USB-Hit).
Starline Series, Metraport 40S
Newer Metrahit devices use a proprietary communication protocol that is basically SCPI with an escape mechanism for some special chars.
LabView
Gossen Metrawatt offers LabView drivers for the Metrahit Energy, the Metrahit Ultra and the Metraport 40S.