Vaisala GMP343 - Manual (Page 15)

Chapter 2 __________________________________________________________ Product Overview
VAISALA_______________________________________________________________________ 13
CHAPTER 2
PRODUCT OVERVIEW
This chapter introduces the features of the GMP343.
Introduction to GMP343
Vaisala CARBOCAP
®
Carbon Dioxide Probe GMP343 is designed for
high accuracy CO
2
measurements. The measurement is based on the
advanced CARBOCAP
®
Single-Beam Dual-Wavelength NDIR
technology. GMP343 consists of a CO
2
sensor, electronics, and a housing
suitable for long-term outdoor use.There are two GMP343 models
available: a flow-through model and a diffusion model. One adjustable
analog output can be configured to output voltage or current signal (0 ...
2.5 V, 0 ... 5 V, 4 ... 20 mA). A digital output for RS-232/RS-485
communication is available. The measuring range options vary from 0 ...
1000 ppm to 0 ... 2 %CO
2
.
Each GMP343 is calibrated using ±0.5 % accurate gases at 0 ppm,
200 ppm, 370 ppm, 600 ppm, 1000 ppm, 4000 ppm and 2 %. Calibration
is also done at temperature points of -30 °C, 0 °C, 25 °C and 50 °C. If
needed, the customer can recalibrate the instrument using the multipoint
calibration (MPC) feature allowing up to 8 user-defined calibration points.
The GMP343 can be ordered with various adapter, filter, and connection
cable options. For a list of spare parts and accessories, see section
Spare
Parts and Accessories on page 80 .