envea STACK 710 - STACK 710 System Specification

STACK 710 6 Theory of Operation and Application
ENVEA UK Ltd (PC-000878-MA Issue 7, December 2021) 55
6.5.3 Calibration Check
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6.6 System Specification
6.6.1 STACK 710
Measuring
Technique:
Double pass/path transmissometry
Operating Wavelength:
520 ± 20 nm
Light Source:
High Intensity LED
Range:
Opacity 0 - 10 % to 0 - 100%
Optical Density 0 - 0.1 to 0 - 3.0
Dust Density 0-10 to 0 to 10000 mg/mg³
User Selectable
Linearity:
< 2% of range
Resolution:
0.1 % Opacity; 0.001 Optical Density; 1 mg/m³ Dust
Drift:
< 3% of range per month
Angle of Projection:
< 2°
Angle of View:
< 2°
Response Time:
6 seconds to 95% of final value
Averaging:
Selectable from 10 seconds to 24 hours (in seconds)
Pathlength:
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Calibration:
Automatic zero and upscale calibration
(Selectable interval 1 to 24 hours in (in 1-hour increments)
Zero Correction:
Automatic correction for zero drift
Control Panel
Display:
128 x 64-pixel reflective backlit LCD
Keypad:
4 keys for data input
Indicators:
Power on, System OK, Calibration, Alarm