Adjustment Types - GMP252

GMP252 User Guide

Document code
M211897EN
Revision
D
Language
English (United States)
Product
GMP252
Document type
User guide

You can adjust the CO2 measurement of the probe in one or two points.

  • One-point adjustment is recommended if you are interested in maintaining a fixed CO2 level. For best result, use a calibration gas with a CO2 concentration that is close to the intended level.
  • Two-point adjustment is recommended if you typically measure a variable CO2 level.

Available adjustment functions depend on the interface you use to operate the probe. If you want to integrate the functionality into a control system, the Modbus interface and the Vaisala industrial protocol are recommended. If you want to compare the reading of the probe to a reference instrument and adjust it accordingly, use an MI70 hand-held indicator and a reference probe.

Vaisala Industrial Protocol

Vaisala industrial protocol supports 1-point and 2-point adjustment with the cco2 command. Configuration of the environmental compensation settings can be done using serial line commands.

Modbus

The environmental compensation settings can be configured using Modbus registers.

MI70 Hand-Held Indicator

The MI70 hand-held indicator supports 1-point adjustment, either using a calibration gas or using a reference instrument that is connected to the MI70.

Vaisala Insight PC software

You can carry out 1-point and 2-point adjustments and change the environmental compensation settings with the Insight software (requires USB cable 242659).

Vaisala Indigo transmitters

You can use the Indigo transmitter's wireless configuration interface to carry out 1-point and 2-point adjustments and change the environmental compensation settings.