P a g e | 40
3) Attach the calibration gas to the Static sample port located on the front of the Envision®
gas analyzer and open the regulator valve. Elkins Earthworks® strongly recommends the
use of a Demand Flow regulator. Warning – If using a tunable regulator, use a setting of
.5 LPM and attach the calibration gas only to the Static port. Do not attach the calibration
gas to the Exhaust, Impact or Available ports. Pressures above 200” H20 on any port may
result in a damaged pressure sensor.
4) Tap the “Start Calibration” button. This action will turn on the sample pump and will
change the handheld computer display.
5) The following image shows the zero calibration screen. The “Calibration Value” located in
the middle should be 0.0%.
6) When the “Current Value” is less than 1% the Calibration status will display “Press
calibrate when measurement stabilizes”. This does not mean that the sensor has fully
stabilized but that the unit is within the 1% tolerance allowed when zeroing. Tap the
“Calibrate” button once the current value has stabilized. If this button is pressed before
the measurement is fully stabilized, the calibration will be inaccurate and, in some cases,
make the Envision unable to pass a span calibration. If the measurement continues to fall
To Next Page
Loading...
Need help?
General