ETS-Lindgren HI-3638 ELV/VLF Electric Field Meter - Manual (Page 33)

www.ets-lindgren.com Operating Protocols 33
Appendix B: Operating Protocols
The information in this section is subject to change, and is included for
reference only.
The following information assumes that the HI-4413P Fiber Optic Modem or
HI-4413USB Fiber Optic to USB Converter was purchased and is communicating
directly with the probe.
Communication Protocol
Data Type: RS-232 Serial
Data Mode: Asynchronous
Word Length: 7 bit
Parity: Odd
Stop Bits: 1
Data Rate: 9600 baud
Information Transfer Protocol
The probe responds to commands from another device; it transmits no data
without first receiving instructions to do so.
Probe Command Structure Probe Response Structure
A command to a probe consists of:
 A command letter
 Parameters (if required)
 (a carriage return)
When the probe completes the
command, it responds with a string
consisting of:
 A start character (":")
 The command letter
 Data (if required)
 (a carriage return)
If an error occurs, the probe responds with an error code. See page 35 for error
codes.