PortaSens
III
Portable Gas Leak Detector, Model D16
Operation and Maintenance Manual
Rev-A Feb 2018
- 40 -
Description
Display
Span Calibration
Navigate to the “Sensor Cal” page (above). If
using a pressurized gas source (very likely for toxic
gas sensors), take note of the source gas
concentration. Start the flow of gas to the sensor.
When the reading has stabilized at its highest
value (usually less than 10 minutes), touch the
“Span” button. The numeric keypad control will
appear and display the current gas reading, as
shown on the right. Use the keypad to enter the
known concentration of the gas source, and then
touch the “Ok” button to perform the span, or touch
the “Back” button to close the control and return
without spanning. Stop the flow of gas to the
sensor.
Calibration History
The H10 sensor has memory for 63 zero and 63 span calibration
records. Each record has the date of calibration, and data pertaining to the
type of calibration.
Zero calibration records save the gas reading prior to performing the
calibration. This is the amount of “drift” since the last zero calibration.
Span calibration records save the sensitivity of the sensor, computed at
the time of calibration. Sensitivity is defined as the sensor output divided by
the source gas concentration, often expressed in terms of “uA/PPM”.