Difference between revisions of "Voltcraft ME-42"

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(Added pics.)
m (→‎Model family: Update Metex ME-21)
 
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| image          = [[File:Voltcraft ME-42 logo.png|180px]]  
| image          = [[File:Voltcraft ME-42 logo.png|180px]]  
| name            = Voltcraft ME-42
| name            = Voltcraft ME-42
| status          = in progress
| status          = supported
| source_code_dir = serial-dmm
| source_code_dir = serial-dmm
| counts          = 4000
| counts          = 4000
Line 12: Line 12:
}}
}}


The '''Voltcraft ME-42''' is a 4000 counts, CAT II (750/1000V) handheld digital multimeter with RS232 connectivity. It is an OEM version of the Metex ME-42. The device was sold by ''Conrad Elektronik'' as article 120130 starting from 1999 and is not available any more.
The '''Voltcraft ME-42''' is a 4000 counts, CAT II (750/1000V) handheld digital multimeter with RS232 connectivity.
 
It is an OEM version of the Metex ME-42. The device was sold by ''Conrad Elektronik'' as article 120130 starting from 1999 and is not available any more.


== Hardware ==
== Hardware ==
Line 23: Line 25:
* '''Fuses''': 800mA/250V 5x20mm and 15A/250V 6x30mm (superfast, ceramic fuses)
* '''Fuses''': 800mA/250V 5x20mm and 15A/250V 6x30mm (superfast, ceramic fuses)
* '''Battery''': 9V NEDA 1604 or 6F22
* '''Battery''': 9V NEDA 1604 or 6F22
** One [http://mysite.verizon.net/tomhunter/experime/meter.htm source] reported a very low battery life.


'''RS232 cable:'''
'''RS232 cable:'''


Standard RS-232 cable with DB9 (M) plug.
* Standard RS-232 cable with DB9 (M) plug.
 
* During tests run by [[User:Matthias Heidbrink|Matthias]], this device did not work with several [[Serial port#USB to serial converter chipsets|USB to serial converters]] (tested MosChip, Prolific, FTDI chipsets), only on a real "RS-232" port.
During tests run by [[User:Matthias Heidbrink|Matthias]], this device did not work with several [[Serial Port#USB_to_Serial_converter_chipsets|USB to serial converters]] (tested MosChip, Prolific, FTDI chipsets), only on a real "RS-232" port.
 
One source on the net [http://mysite.verizon.net/tomhunter/experime/meter.htm] reported a very low battery life.


== Photos ==
== Photos ==
Line 82: Line 82:


|-
|-
| Metex ME-21
| [[Metex ME-21]]
| style="text-align:center" | -
| style="text-align:center" | -
| style="text-align:center" | ?
| style="text-align:center" | ?
Line 91: Line 91:
| style="text-align:center" | ●
| style="text-align:center" | ●
| style="text-align:center" | -
| style="text-align:center" | -
| style="text-align:center" | ?
| style="text-align:center" | -
| Manual Range
| Manual Range


Line 252: Line 252:
| 400.0 mA
| 400.0 mA
| 100 µA
| 100 µA
| ±(1,2% + 3)
| ±(1.2% + 3)
| "
| "
|  
|  
Line 259: Line 259:
| 20.00 A
| 20.00 A
| 10 mA
| 10 mA
| ±(2,0% + 5)
| ±(2.0% + 5)
| "
| "
|  
|  
Line 267: Line 267:
| 4.000 mA
| 4.000 mA
| 10 µA
| 10 µA
| ±(1,0% + 5)
| ±(1.0% + 5)
| mq Curr., unit A, mqflags AC
| mq Curr., unit A, mqflags AC
|   
|   


|-
|-
| 300.0 mA
| 400.0 mA
| 100 µA
| 100 µA
| ±(1,5% + 5)
| ±(1.5% + 5)
| "
| "
|  
|  
Line 334: Line 334:
|  
|  
| mq V, unit V, mqflags DC,DIODE
| mq V, unit V, mqflags DC,DIODE
| Max. 1,5 mA
| Max. 1.5 mA


|-
|-
Line 349: Line 349:
The column "sigrok result" contains in short form what the driver generates for the resp. data type.
The column "sigrok result" contains in short form what the driver generates for the resp. data type.


The device seems to be extremely slow when the RS-232 interface is enabled and often takes up to about 10 seconds to detect a changed value or switch to another range. During this time a previous value keeps being sent. When changing to a new range automatically or manually, the device might send the old value scaled to the new range for a short time. This behaviour is caused by the device, not by sigrok!
The device seems to be extremely slow when the RS-232 interface is enabled and often takes up to about 10 seconds to detect a changed value or switch to another range. During this time a previous value keeps being sent. When changing to a new range automatically or manually, the device might send the old value scaled to the new range for a short time. This behaviour is caused by the device, not by sigrok! It improves slightly in manual range.


[[Category:Device]]
[[Category:Device]]
[[Category:Multimeter]]
[[Category:Multimeter]]
[[Category:In progress]]
[[Category:Supported]]

Latest revision as of 13:14, 27 May 2020

Voltcraft ME-42
Voltcraft ME-42 logo.png
Status supported
Source code serial-dmm
Counts 4000
IEC 61010-1 CAT II (750 V AC/1000 V DC)
Connectivity RS-232 (DB9)
Measurements voltage, current, resistance, diode, continuity
Features autorange, hold, bargraph
Website conrad.de

The Voltcraft ME-42 is a 4000 counts, CAT II (750/1000V) handheld digital multimeter with RS232 connectivity.

It is an OEM version of the Metex ME-42. The device was sold by Conrad Elektronik as article 120130 starting from 1999 and is not available any more.

Hardware

Multimeter:

  • TODO
  • Fuses: 800mA/250V 5x20mm and 15A/250V 6x30mm (superfast, ceramic fuses)
  • Battery: 9V NEDA 1604 or 6F22
    • One source reported a very low battery life.

RS232 cable:

  • Standard RS-232 cable with DB9 (M) plug.
  • During tests run by Matthias, this device did not work with several USB to serial converters (tested MosChip, Prolific, FTDI chipsets), only on a real "RS-232" port.

Photos

Multimeter:

Protocol

See Multimeter_ICs#Metex_14-byte_ASCII for the DMM IC protocol.

Model family

It seems that this device belongs to a family of several similiar devices and OEM models.

Metex Conrad PeakTech Radio Shack RMS Frequency Transistor Logic Temp Cap. Remarks
Metex ME-11 - ? RadioShack 22-805 ? ? ? ? ? ? Amps manual range; seems to be similiar to ME-42


Metex ME-21 - ? ? - - - - Manual Range
Metex ME-22 Voltcraft ME-22 ? ? ? ? Manual Range
Metex ME-22 RMS Voltcraft ME-22 RMS ? ? ? Manual Range
Metex ME-31 - PeakTech 3410 ? ? ? ? ?
Metex ME-32 Voltcraft ME-32 ? ? - - - Amps manual range
Metex ME-42 Voltcraft ME-42 ? ? - - - - - - Amps manual range

Resources

Measurement functions and ranges

Measurement function Range Resolution Accuracy sigrok result Remarks
V= 400.0 mV 100 μV ±(0.5% + 3) mq V, unit V, mqflags DC "
4.000 V 1 mV "
40.00 V 10 mV "
400.0 V 100 mV "
1000 V 1 V "
V≈ 400.0 mV 100 μV ±(1.0% + 5) mq V, unit V, mqflags AC 40 Hz - 100 Hz
4.000 V 1 mV " 40 Hz - 400 Hz
40.00 V 10 mV " "
400.0 V 100 mV " "
750 V 1 V " "
A= 4.000 mA 1 µA ±(0.8% + 3) mq Curr., unit A, mqflags DC
400.0 mA 100 µA ±(1.2% + 3) "
20.00 A 10 mA ±(2.0% + 5) "
A≈ 4.000 mA 10 µA ±(1.0% + 5) mq Curr., unit A, mqflags AC
400.0 mA 100 µA ±(1.5% + 5) "
20.00 A 10 mA ±(3.0% + 5) "
Ω 400.0 Ω 100 mΩ mq Res., unit Ω, mqflags - Continuity beep < 50 Ω
4.000 kΩ 1 Ω "
40.00 kΩ 10 Ω "
400.0 kΩ 100 Ω "
4.000 MΩ 1 kΩ "
40.00 MΩ 10 kΩ "
Diode 2.000 V– 1 mV mq V, unit V, mqflags DC,DIODE Max. 1.5 mA
Data Hold -

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

The device seems to be extremely slow when the RS-232 interface is enabled and often takes up to about 10 seconds to detect a changed value or switch to another range. During this time a previous value keeps being sent. When changing to a new range automatically or manually, the device might send the old value scaled to the new range for a short time. This behaviour is caused by the device, not by sigrok! It improves slightly in manual range.