Fluke RUSKA 2456-LEM, User Manual

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Remote Pressure Capture
Cabling
4
4-3
Cabling
Connecting the RUSKA 6220 to the LEM Pressure Serial Port
Table 4-1. RUSKA 6220 25 Pin RS-232 Connector
PIN DESCRIPTION
2 Transmitted data (to PPG)
3 Receive Data (from PPG)
4* RTS (must be set for PPG to transmit)
5* CTS (always set by PPG)
7 GND
*Connect Pins 4 & 5 together.
Table 4-2. RUSKA 6220 DB25 and LEM DB9 Connections
6220
DB25
LEM
DB9
2 3
3 2
7 5
Refer to 6220 Manual and Chapter 6, DB9 Connections, of this manual for additional
information.
RUSKA 7220 to the LEM Pressure Serial Port
Connecting the RUSKA Model 7220 to the LEM pressure serial port requires a Null modem
adapter or Null modem cable DB9 M / DB 9 F. Only Pins 2 and 3 must be swapped in the Null
Modem cable.
Use with Other RS232 Output Transducers
Protocol
The LEM can retrieve pressure data from other "smart" pressure sensors, as long as the return
string can be parsed. The string returned to the LEM must be in ASCII characters.
The LEM breaks down the returned string as follows:
1.
Delete Prefix—all non-numeric characters are deleted up to the first numeric character.
2. The Exponent character (E or e) is located.
3. A one or two digit numeric exponent is read following the Exponent character.
Examples of valid returned strings:
101.23
101.23kPa
1.0123E02
PA, 1.0123e02 kPa
PA, 101.23