Ventis™ LS Product Manual
© Industrial Scientific Corporation
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Calibration Due Set-point Screen
Value range: one to 365 days
Value increment: one day
Sets the elapsed time allowed between calibrations.
Press
ENTER to edit
the value, if needed.
Press
ON/OFF/MODE to set
the value and advance to the Security
Code Set Screen.
Security Code Set Screen
Valid values: 000 to 999.
Increment value: one
A security code value of 000 permits all monitor users to enter
configuration mode and gain access to change the monitor’s settings.
A value other than 000 will restrict access to the configuration mode.
Press
ENTER to edit
the value, if needed; press repeatedly or hold
down to speed the increment pace.
Press
ON/OFF/MODE to set
the value and advance to the Language
Selection Screen.
Language Selection Screen
Options
E = English
F = French
d = German
Allows the choice of display languages as applied to select screens.
Press
ENTER to edit
the value, if needed.
Press
ON/OFF/MODE to set
the value and return to the LEL Type Set
Screen.
Monitor Use and Service
Proper monitor use and service includes everything from bump testing and calibration to keeping the monitor clean,
proper air sampling, and the replacement of parts and components. Beginning with calibration and bump testing, the
following sections provide information and instruction on all use and service tasks.
Zero, Calibration, and Bump Testing
INTRODUCTION
All sensors gradually degrade over time. Without regular calibrations, sensor readings during monitor use will not
accurately display true gas concentrations. During the calibration process, the monitor self-adjusts so that the
sensors retain their ability to correctly measure and accurately display gas concentration values. When a sensor has
degraded beyond an acceptable level, it has reached its end of life and will no longer pass a calibration.
Zeroing is the first step in the calibration process. When zeroing, the monitor is exposed to the ambient air (or zero
grade air) and each toxic and LEL sensor registers to zero; the O
2
sensor is calibrated (when set to the default value
of 20.9% or 21%). After a successful zero, the calibration process begins for the installed toxic and combustible
sensors. Each sensor expects to be exposed to a known concentration of gas. As each sensor calibrates, the monitor
self-adjusts, if needed, to ensure the gas concentration values are accurately registered and displayed.
A
bump test is defined as a brief exposure of each sensor to an expected concentration of gas greater than the
sensor’s low alarm set-point. It is a functional test to verify sensor and alarm operation only. It is not a measure of
monitor accuracy; no adjustments are made to the monitor during a bump test. If a monitor fails a bump test, a full
calibration is recommended.
