Difference between revisions of "Norma DM950"

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(Added pics, minor fixes)
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{{Infobox multimeter
{{Infobox multimeter
| image          = <!-- [[File:Mastech_mas345_device_front.png|180px]] -->
| image          = [[File:Norma DM950 1.JPG|180px]]  
| name            = Norma DM9x0
| name            = Norma DM9x0
| status          = planned
| status          = planned
| source_code_dir = <!-- serial-dmm -->
| source_code_dir = <!-- serial-dmm -->
| counts          = 21000
| counts          = 21000
| categories      = -
| categories      = CAT II 600 V, CAT III 300 V
| connectivity    = Proprietary 5-pin cable <!-- [[Device_cables#Metex_5-pin_RS232_cable|RS232]] -->
| connectivity    = Proprietary 5-pin cable <!-- [[Device_cables#Metex_5-pin_RS232_cable|RS232]] -->
| measurements    = voltage, current, resistance, capacitance, temperature, diode, continuity
| measurements    = voltage, current, resistance, capacitance, temperature, diode, continuity
| features        = autorange, data hold, bargraph, backlight
| features        = autorange, data hold, bargraph, (backlight)
| website        = <!-- [http://web.archive.org/web/20080305031323/http://www.p-mastech.com/products/04_dm/mas345.html p-mastech.com] -->
| website        = <!-- [http://web.archive.org/web/20080305031323/http://www.p-mastech.com/products/04_dm/mas345.html p-mastech.com] -->
}}
}}
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|}
|}


The models were available with or without RS232 interface, the RS232 interface was also available as an accessory.
The RS232 interface is optional. All models were available with or without RS232 interface, the RS232 interface was also available as an accessory.


= Hardware =
= Hardware =
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== Interface ==
== Interface ==
The interface consists of the following components:
The RS232 interface consists of the following components:
# Interface board inside of multimeter
# Interface board (installed inside of multimeter)
# Printer cable 5-pin to DB9
# Printer cable 5-pin to DB9
# PC adaptor (Null modem plug with slightly unusal pinout)
# PC adaptor (Null modem plug with slightly unusal pinout)
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= Photos =
= Photos =
TODO
'''Multimeter''':
 
<gallery>
File:Norma DM950 1.JPG|<small>Outer package</small>
File:Norma DM950 2.JPG|<small>Package</small>
File:Norma DM950 3.JPG|<small>Outer package</small>
File:Norma DM950 4.JPG|<small>Front without rubber holster</small>
File:Norma DM950 5.JPG|<small>Back without rubber holster</small>
File:Norma DM950 6.JPG|<small>Battery case open</small>
File:Norma DM950 7.JPG|<small>Board without RS232 interface board</small>
File:Norma DM950 8.JPG|<small>Inside with RS232 interface board</small>
File:Norma DM9x0 Interface Board 1.JPG<small>Interface board, back side</small>
File:Norma DM9x0 Interface Board 2.JPG<small>Interface board, front side</small>
</gallery>
 
'''RS232 cable''':
<gallery>
File:Norma DM9x0 Interface Cables.JPG|<small>''Printer Cable'' (original) and ''PC Adaptor'' (look-alike)</small>
</gallery>


= Protocol =
= Protocol =

Revision as of 17:00, 3 October 2013

Norma DM9x0
Norma DM950 1.JPG
Status planned
Counts 21000
IEC 61010-1 CAT II 600 V, CAT III 300 V
Connectivity Proprietary 5-pin cable
Measurements voltage, current, resistance, capacitance, temperature, diode, continuity
Features autorange, data hold, bargraph, (backlight)

The LEM Norma DM9x0 Series of multimeters are 21000 count CAT II/CAT III hand multimeters with optional RS232 connectivity. The models differ by precision and feature set.

They were also sold as OEM devices by Siemens.

Models

Model Siemens OEM Precision (DC) Backlight RMS TRMS R 20 MΩ R 200 MΩ U AC 1 kΩ/V I 10A f C
Norma DM910 B1024 ±(0.5% +2d)
Norma DM920 B1025 ±(0.5% +2d)
Norma DM930 B1026 ±(0.3% +3d/+2d)
Norma DM940 B1027 ±(0.1% +3d/+2d) ● ?
Norma DM950 B1028 ±(0.06% +3d/+2d)

The RS232 interface is optional. All models were available with or without RS232 interface, the RS232 interface was also available as an accessory.

Hardware

Multimeter

Interface

The RS232 interface consists of the following components:

  1. Interface board (installed inside of multimeter)
  2. Printer cable 5-pin to DB9
  3. PC adaptor (Null modem plug with slightly unusal pinout)

The RS232 interface is designed to allow a direct connection to a serial printer or data recorder. Therefore an adaptor is required to connect it to a PC.

Comm parameters (PC): DTR on, RTS off, RTS/CTS flow control (!).

If the interface cannot be powered from RS232 (e. g. RS232-USB converter with too low voltage), switching on the multimeter with the FUNC button pressed powers the interface from multimeter.

The printer cable has got a power connector (10-16 V DC, 50 mA) to power the multimeter and the interface externally.

Photos

Multimeter:

RS232 cable:

Protocol

Printer Mode

TODO

PC communication mode

TODO

Resources

TODO