38
EM38-MK2 RS232 DATA PROTOCOL
February 2008
DESCRIPTION
The data from EM38-MK2 is transmitted to a data logging computer via a
RS-232 port. The conversion and sending are automatic and continuous, no
trigger is needed.
PORT AND CABLE PIN ASSIGNMENT
The computer interface is provided via a 3-pin circular Lemo socket
mounted on the EM38-MK2 panel. A 3-pin circular connector to 9-pin sub-D
connector cable is supplied (as and option) with the system for
connection between EM61-MK2 and the default controlling datalogger. The
same cable can be used to connect EM38-MK2 to other computer or data
acquisition system provided that such computer or system has an RS-232
port.
EM38-MK2 INTERFACE CABLE pin assignment is summarised as follows:
3-pin connector
9-pin sub-D
function
EM61-MK2
POLY/COMPUTER
3 (output)
2 (input)
RS-232 RXD
2 (input)
5 (output)
Ground
RS-232 CONFIGURATION
The port is configured as a Date Communication Equipment. No handshaking
is used. It is initialise as follows:
Baud rate:
19200
parity:
none
data bits:
8
stop bit:
1
DATA RATE
20 records per second (approximate)
EM38 DATA RECORD FORMAT
There are 4 channels of data for 1M and 0.5M In-phase and conductivity
information. There are other 2 channels for 1M and 0.5M coil temperature
information. Each channel has 2 byte.
Summary of Contents for EM38-MK2
Page 7: ...5 Fig A...
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