Manual

ManualsBrandsVaisala ManualsToolsGMM220

GMM220

Transmitter Modules

M010115EN-E _______________________________________________________________________ 1

Introduction

Vaisala GMM220 transmitter modules are versatile instruments for measuring CO

industrial applications. The CARBOCAP

sensor is silicon based and its operation is

based on the NDIR Single-Beam Dual-Wavelength principle. The modules can be

configured for different CO

measurement ranges and analog output ranges.

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. The

shorter probe model (GMP221) is for higher and the longer model (GMP222) for lower

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

interchangeability of the probes and allows easy field calibration by exchanging the

probe with a freshly calibrated one.

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.

Figure 2 Dimensions of the Component Board (in mm)

If the board has pinheaders, mount it by soldering or plugging it into host board's female

connectors.

Summary of content (6 pages)

PAGE 1
GMM220 CO2 Transmitter Modules Introduction Vaisala GMM220 transmitter modules are versatile instruments for measuring CO2 in industrial applications. The CARBOCAP® sensor is silicon based and its operation is based on the NDIR Single-Beam Dual-Wavelength principle. The modules can be configured for different CO2 measurement ranges and analog output ranges.
PAGE 2
GMM220_____________________________________________________ CO2 Transmitter Modules Electrical Connections Figure 3 Electrical Connections Power supply: Two supply voltage alternatives: - +L - +H - GND 12 volt supply input (11 VDC - 20 VDC) 24 volt supply input (18 VDC - 30 VDC) common ground for power supply Average current consumption is 100 mA (+ current output, max. 20 mA) Analog outputs: - 0 - V - mA common for both analog outputs voltage output (default 0-1 V, on request 0-2 V, 0-2.
PAGE 3
GMM220_____________________________________________________ CO2 Transmitter Modules LEDs: - Normal operation: Led V8 (red) is not lit and Led V9 (green) is blinking. - Measurement out of range: Led V8 (red) is blinking and Led V9 (green) is blinking, maximum value is shown. GMM220 returns to normal operation when CO2 drops within range. - Error state: Led V8 (red) is blinking and Led V9 (green) is blinking, no readings. In error state, check first that the probe is properly connected.
PAGE 4
GMM220_____________________________________________________ CO2 Transmitter Modules Pressure Compensation If altitude differs significantly from sea level (default), a pressure compensation should be made. MF_PRESSURE xxxx Altitude m (ft) where: xxxx = pressure in hPa.
PAGE 5
GMM220_____________________________________________________ CO2 Transmitter Modules Technical Data Carbon Dioxide Measuring ranges GMM221 0 … 2%, 0 … 3%, 0 … 5%, 0 … 10% , 0 … 20% CO2 GMM222 0 … 2000 ppm, 0 … 3000 ppm, 0 … 5000 ppm, 0 … 7000 ppm, 0 … 10 000 ppm Accuracy (including repeatability, non-linearity and calibration uncertainty) at 25 °C and 1013 hPa GMM221 ±1.5% of range + 2 % of reading (applies for concentrations above 2% of full scale) GMM222 ±1.5% of range + 2 % of reading Nonlinearity ± 0.
PAGE 6
GMM220_____________________________________________________ CO2 Transmitter Modules Compliance With EMC-Standards - EN 61326-1:1997 + Am1:1998, Electrical equipment for measurement, control and laboratory use - EMC requirements - Generic environment - Testing: - CISPR16/22 class B - EN/IEC 61000-4-2 - EN/IEC 61000-4-3 - EN/IEC 61000-4-4 - EN/IEC 61000-4-5 - EN/IEC 61000-4-6. Warranty Visit our Internet pages for standard warranty terms and conditions: http://www.vaisala.com/warranty.