Vaisala GMP343 - Manual (Page 77)

Chapter 7 ____________________________________________________________ Technical Data
VAISALA_______________________________________________________________________ 75
CHAPTER 7
TECHNICAL DATA
This chapter provides the technical data of the GMP343.
Performance
Sensor
Vaisala CARBOCAP
®
Measuring principle Single-Beam Dual-Wavelength NDIR
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 and 1013 hPa after factory calibration with 0.5 % accurate
gases with different range options
0 ... 1000 ppm
0 ... 2000 ppm - 0 ... 2 %* ±(3 ppm CO
2
+ 1 % of reading)
±(5 ppm CO
2
+ 2 % of reading)
* Accuracy below 200 ppm CO
2
not specified for the 2 % range option
Noise (repeatability) at 370 ppm CO
2
with no output averaging
with 30 s output averaging ±3 ppm CO
2
±1 ppm CO
2
Short-term stability (up to 6 hours) at 370 ppm CO
2
±1 ppm CO
2
Long-term stability
In easy operating conditions
In moderate oper. conditions
In harsh operating conditions ±2 % of reading */ year
±2 % of reading */ 6 months
±2 % of reading */ 3 months
* Always at least ±10 ppm CO
2
See Figure 12 on page 79 .