M-1
RS-232 (5-volt) Option
0114981
1/14/98
1. General Description
1. General Description
1. General Description
1. General Description
1. General Description
This option transmits serial RS-232 (5-volt) data on the white/green wire (pin 9) of the M-1. The
serial data transmitted is the same as that shown on the digital display of the M-1. The white/green
wire may be connected to a PC through Electronics International’s 8 Channel Multiplexer Unit (MUX-
8). If the transmitted signal is inverted, it may be connected directly to a PC. The serial data is
transmitted in a comma delimited format, suitable for importing into most spreadsheet and data base
programs.
2. Instrument Operation
2. Instrument Operation
2. Instrument Operation
2. Instrument Operation
2. Instrument Operation
The RS-232 (5-volt) option does not affect the operation of the M-1. See the M-1 Operating and
Installation Instructions for M-1 operating information.
3.
3.
3.
3.
3.
T
T
T
T
Transmit Specifications
ransmit Specifications
ransmit Specifications
ransmit Specifications
ransmit Specifications
* Baud Rate:
9600
* Data Bits:
8
* Start Bit:
1 (Logic Low)
* Stop Bit:
1 (Logic High 5-volts)
* Parity:
None
* Transmit Rate: 1/3 sec.
4.
4.
4.
4.
4.
T
T
T
T
Transmit F
ransmit F
ransmit F
ransmit F
ransmit Format
ormat
ormat
ormat
ormat
The M-1 transmits the following record:
MP,nn.nCrLf
MP
Instrument identifier.
,
A comma separates data fields.
nn.n
Data as shown on the digital display (00.0 to 99.9). Positive numbers only.
Cr
Carriage return (0Dh)
Lf
Line feed (0Ah)
5. Hook-Up
5. Hook-Up
5. Hook-Up
5. Hook-Up
5. Hook-Up
Place the white/green wire (included in the kit) into pin 9 from the back of the M-1 cable harness.
RS-232 (5-volt) serial data is transmitted on this wire.
