GMP343 VAISALA | Alldatasheet

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Technical content

Features

  • Vaisala CARBOCAP â sensor, a silicon-based non-dispersive infrared (NDIR) sensor
  • Single-beam, dual wavelength CO2 measurement with no moving parts
  • Compensation options for temperature, pressure, humidity, and oxygen
  • Designed for outdoor use Vaisala CARBOCAPâ Carbon Dioxide Probe GMP343 is an accurate and rugged probe-type instrument for ecological measurements. Typical applications include CO2 soil respiration, ambient CO2 monitoring, plant growth chambers, and OEM applications. Benefits
  • Low power consumption and heat emission
  • Compact and lightweight
  • Excellent accuracy and stability GMP343 can output both numerically filtered and raw measurement data, and it can also compensate the measurement with an internal temperature measurement and user-set relative humidity, pressure, and oxygen values. In combination with an MI70 indicator, GMP343 provides a tool for accurate in- situ measurement. MI70 can be used as a display, communication, and data logging device. 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 If needed, the customer can recalibrate the instrument using the multipoint calibration (MPC) feature allowing up to 8 user-defined calibration points.

Measurement range options 0 … 1000 ppm, 0 … 2000 ppm, 0 … 3000 ppm, 0 … 4000 ppm, 0 … 5000 ppm, 0 … 2 % Accuracy (excluding noise) at 25 °C (77 °F) and 1013 hPa after factory calibration with 0.5 % accurate gases with different range options 0 … 1000 ppm ±(3 ppm + 1 % of reading) 0 … 2000 ppm - 0 … 2 %1) ±(5 ppm + 2 % of reading) Noise (repeatability) at 370 ppmCO2 With no output averaging ±3 ppmCO2 With 30 s output averaging ±1 ppmCO2 Long-term stability (see graph 'GMP343 operating conditions') Easy ±2 % of reading 2)/ year Moderate ±2 % of reading 2)/ 6 months Harsh ±2 % of reading 2)/ 3 months Warm-up time To full accuracy ±0.5 % 10 min To full accuracy 30 min 1) Accuracy below 200 ppmCO 2 not specified for 2 % range option. 2) Always at least ±10 ppmCO 2. Effect on accuracy with temperature compensation CO2 range options 0 … 1000 ppm 0 … 2 000 - 5000 ppm 0 … 2 % Temperature °C (°F) Accuracy (% of reading)1) +10 … +40 (+50 … +104) ±1 ±1 ±2 +40 … +60 (+104 … +140) ±2 ±3 ±4 −40 … +10 (−40 … +50) ±3 ±3 ±5 1) Always at least ±10 ppmCO 2. Temperature compensation is performed by an integrated Pt1000 element. GMP343 operating conditions Effect on accuracy with pressure compensation CO2 range options 0 … 1000 ppm 0 … 2000 - 2 % Pressure (hPa) Accuracy (% of reading) 900 … 1050 ±0.5 ±1 700 … 1300 ±1 ±2 Integrated pressure sensor not included in GMP343. Response time (90 %) Diffusion model Filter attached Averaging (s) Response (s) Yes 0 75 Yes 30 82 No 0 4 No 30 30 Flow-through model Gas flow (l/min) Averaging (s) Response (s) 0.3 0 26 0.3 30 44 1.2 0 8 1.2 30 23 Operating environment Operating temperature −40 … +60 °C (−40 … +140 °F) Storage temperature −40 … +70 °C (−40 … 158 °F) Operating humidity See graph ‘GMP343 operating conditions’ Compensated pressure range 700 … 1300 hPa Operating pressure < 5 bar Gas flow for flow-through model 0 … 10 liters/min EMC compliance IEC/EN 61326-1, Basic environment 1) 1) Compliance with IEC/EN 61000-4-3: At 3 V/m RF field test within frequency range 300 … 400 MHz may cause additional deviation of 150 ppmCO2. Inputs and outputs Operating voltage 11 … 36 VDC Power consumption Without optics heating : < 1 W With optics heating : < 3.5 W Digital outputs RS-485, RS-232 Analog outputs Current output range 4 … 20 mA Current output resolution 14 bits Current output maximum load 800 Ω at 24 VDC, 150 Ω at 10 VDC Voltage output range 0 … 2.5 V, 0 … 5 V Voltage output resolution 14 bits (13 bits with 0 … 2.5 V) Voltage output minimum load 5 kΩ Mechanical specifications Housing Anodized aluminium Filter cover PC Cable connector type 8-pin M12 Weight (probe only) 360 g (12.7 oz) IP rating Housing (cable attached) IP67 Diffusion filter (weather protection) IP65 Diffusion filter (sintered PTFE) IP66

Spare parts and accessories Wall mount bracket GMP343BRACKET Mounting flange GMP343FLANGE Standard diffusion filter (weather protection, IP65) with filter cover GMP343FILTER Diffusion filter (sintered PTFE filter, IP66) with filter cover 215521 Calibration adapter (for the diffusion model) GMP343ADAPTER Junction box JUNCTIONBOX-8 Probe cables PC connection cable, 2 m (6 ft 7 in) 219687 Interface cable for MI70, 2 m (6 ft 7 in) DRW216050SP Soil adapter kit for horizontal positioning 215519 Soil adapter kit for vertical positioning 215520 Cable options 2 m (6 ft 7 in) GMP343Z200SP 6 m (19 ft 8 in) GMP343Z600SP 10 m (32 ft 10 in) GMP343Z1000SP 55 mm 52.5 mm 4 mm91 1 mm81 GMP343 dimensions (diffusion model) 45 mm 55 mm 24 mm 8 mm81 5 mm71 GMP343 dimensions (flow-through model) Published by Vaisala | B210688EN-H © Vaisala Oyj 2020 All rights reserved. Any logos and/or product names are trademarks of Vaisala or its individual partners. Any reproduction, transfer, distribution or storage of information contained in this document is strictly prohibited. All specifications — technical included — are subject to change without notice. www.vaisala.com