Vaisala GMM220 Series Quick Manual

INTRODUCTION
Vaisala's GMM220 transmitter modules are versatile instruments for measuring CO
industrial applications. The CARBOCAP
based on the NDIR Single-Beam Dual-Wavelength principle. The modules can be
configured for different CO
78
48
Figure 1. Dimensions of the Probes and Component Board of the GMM220 Series
(in mm).
The GMM220 module consists of a component board, cable and a CO
probe model (GMP221) is for higher and the longer model (GMP222) for lower CO
concentrations. A waterproof connector connects the probe to the cable. The probe also
features a non-volatile memory for storing the calibration parameters. This enables true
interchangeability of the probes and forms a good basis for easy field calibration.
MOUNTING
For power supply and analog outputs, the board is available either with pinheaders on
bottom side or with screw terminals on top side; serial interface has always a pinheader.
If the board has pinheaders, mount it by soldering or plugging it into host board's female
connectors.
1
GMM220 Series CO
measurement ranges and analog output ranges.
2
Figure 2 Dimensions of the Component Board (in mm)
Transmitter Modules
2
®
sensor is silicon based and its operation is
100
GMP221
35
80
GMP222
145
M010115EN-D
2
D18.5 GMP 221
GMP 222
D18.5
probe. The shorter
2
2
in