PortaSens
III
Portable Gas Leak Detector, Model D16
Operation and Maintenance Manual
Rev-A Feb 2018
- 41 -
A reference span calibration is performed at the factory when the sensor
is manufactured. This records the sensitivity of the sensor when new, and
under ideal calibration conditions. The D16 displays all subsequent span
calibration sensitivity data as a percentage of the reference span sensitivity.
A value of 100% indicates the sensitivity has not changed. Lower values
indicate decreased sensitivity. Values much greater than 100% may indicate
an error in the span calibration gas, flow rate, or numeric entry. It is
recommended to replace the sensor when the sensitivity decreases to 10% or
lower.
Steps for viewing the calibration history are detailed in Table 15 below.
Table 15 Viewing calibration history.
Description
Display
Cal History Page
On the “Main Display” page, touch the “Menu”
button, followed by the “Sensor” button, and then
touch the “Cal History” button. This will present the
“Cal History” page, as shown on the right.
The page presents calibration records on two
controls, one for zero records (top), and the other
for span records (bottom). The controls are nearly
identical and display the record number, date, and
gas “Reading” for zero records, and “% Sensitivity”
for span records.
When the page first appears, the most recent
calibrations are displayed in each control, and the
record numbers will indicate how many calibrations
have been performed (1-63). To view older
records, touch the control and use the up and
down buttons to scroll through them.
