Industrial Scientific Ventis LS Product Manual page 28

Ventis™ LS Product Manual
Sensor Results Screen*
Pass (top) or Fail (bottom) Screen
The display alternately shows a "P" for pass (or "F" for
fail) and the final span value reading for each sensor. A
check mark displays and a single beep sounds.
NOTE: The "span reserve" of a sensor measures its sensitivity. The
displayed span value divided by the calibration gas value equals the
span reserve percentage. A span reserve percentage of greater than
70% indicates a "good" sensor; 50%-70% indicates "marginal"
sensitivity. When the span reserve percentage is less than 50%, the
sensor will not pass calibration.
Calibration Failed Screen*
Gas readings display for all successfully calibrated
sensors and an "F" displays for any failed sensors. A
system level alarm turns on. The warning icon and gas
cylinder display to indicate a sensor calibration failure.
* During the standard calibration or standard bump test process, a series of apply gas, in-progress, and results screens show for EACH sensor as it
is calibrated or tested.
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STOP THE FLOW OF GAS.
After calibration, or if calibration is terminated at anytime
during the process, stop the flow of gas.
All Sensors Pass
The user returns to the mode from which the calibration
process was entered (configuration or gas monitoring).
Sensor Fail
If one or more sensors fail calibration, the Calibration Fail
Screen displays and a system level alarm turns on.
Any failed sensor stays in alarm until it passes a
calibration or is replaced.
Press ON/OFF/MODE to repeat calibration.