Ventis™ LS Product Manual
26
© Industrial Scientific Corporation
Zero and Quick Calibration Process
NOTE: To view a fully narrated step-by-step audio visual demonstration of the zero, calibration, or bump test
processes, visit the online Ventis LS Resource Center at www.indsci.com/VentisLSresources.
Display and Options
Instructions
Gas Monitoring Screen
Numeric mode display (left)
Text mode display (right)
Displays the gas concentration readings (or gas names
in text mode) for all installed sensors. If a sensor is NOT
installed, its position on the LCD is blank.
Press
ON/OFF/MODE
to advance
to the Days since
Calibration Screen.
Days Since Calibration Screen
Displays the number of days since the last successful
calibration for each installed sensor. Each value can be
different.
Press
ON/OFF/MODE
to advance
to one of three
screens.
If zero in-field is enabled, the user advances to the
Zero Initiate Screen.
If zero in-field is disabled and bump test in-field is
enabled, the user advances to the Bump Test Initiate
Screen.
If zero in-field and bump test in-field are both
disabled, the user advances to the Peak Readings
Screen.
NOTE: When zero, calibration, and bump test are ALL in-field enabled, and the user has entered zero from the gas
monitoring mode, the monitor expects to be calibrated following a successful zero.
If the desired task, after zero, is bump testing (or clearing the peaks) and NOT calibration, follow the instructions at
the Calibration Apply Gas Screen to terminate calibration.
Zero Initiate Screen
Options:
Enter Zero
Bypass Zero
Press
ENTER
to begin
the zero process and advance to
the Zero In-process Screen.
Press
ON/OFF/MODE to bypass
zero and calibration
and advance to one of two screens.
If bump test in-field is
enabled,
the user advances to
the Bump Test Initiate Screen.
If bump test in-field is
disabled
, the user advances to
the Peak Readings Screen.
Zero In-process Screen
Each sensor’s numerical value becomes zero except
O
2
. An updated O
2
span value displays. The clock icon
flashes and the zero icon displays.
Allow the zero process
to complete and advance to the
Zero Results (Pass or Fail) Screen.
After the zero process
, press
ON/OFF/MODE
to
bypass calibration
of the installed toxic and combustible
sensors. The user returns to the mode from which the
calibration process was entered (configuration or gas
monitoring).
NOTE: during the zero process, the O
2
sensor is calibrated (when set to
default gas volume of 20.9%).
