Serial Line Configuration - GMP251 - GMP252

Relay Box for GMP250 Carbon Dioxide Probes Quick Guide

Document code
M211920EN
Revision
C
Language
English (United States)
Product
GMP251
GMP252
Document type
User guide

To enable relay operation, you must use a terminal program (for example, PuTTy) to set the GMP251/252 serial mode to relay communication and configure the relay settings. Using serial line (Vaisala Industrial Protocol) to configure the probe requires the following:

  • Vaisala USB service cable (order code 242659)
  • Computer with:
    • Windows operating system
    • Terminal application (for example PuTTy, available from www.vaisala.com/software)
    • Free USB port
    • Driver for Vaisala USB service cable installed (available on the cable installation media and at www.vaisala.com/software)

The default serial interface settings are shown in the following table.

Table 1. Default Serial Interface Settings
Property Description/Value
Bit rate 19200
Parity None
Data bits 8
Stop bit 1
Flow control None
For more detailed instructions on connecting to GMP251/GMP252 with a computer and using the serial line interface, see the User Guides of the probes.