PortaSens
III
Portable Gas Leak Detector, Model D16
Operation and Maintenance Manual
Rev-A Feb 2018
- 60 -
Symptom
Possible Cause and Corrective Action
Alarm slow to clear
Check that the sensor “Damping” value is set below 20. If so, the
sensor may have been exposed to a high concentration of target
gas. If so, it will require an extended period of time for to recover.
Leave the device running while sample zero air. If the condition
does not clear after 6 hours, replace the sensor or contact ATI
Service Department.
Another possibility (although, uncommon) is that the sensor has
been incorrectly calibrated, and the reading is no longer accurate.
Verify the readings using certifiable zero and span gas sources.
USB port not working
The D16 may not be able to operate from an unpowered USB hub,
or a hub on the front panel of a PC. Move to a different USB port.
Windows reports, “USB Driver
Not Installed”
When the D16 is first connected to a USB host, operating systems
like Microsoft Windows will install a proper USB Mass Storage
Device driver and enable it. This normally takes under 4 seconds,
after which, the D16 powers on its LCD and displays the “USB
Mode” page.
If the host reports the driver was not installed, it usually means a
driver
was
installed, but that the port may have momentarily reset
the D16 (which made it appear to lose communication). Remove
and re-plug the USB connector.
·
Move the USB connection to a different USB host port, or a
different PC.
·
Replace the USB cable.
This should correct the problem and the host should display the
contents of the D16 drive reliably from then on.
General Corrective Actions
Troubles often stem from a few common causes. Performing the steps
below may help to quickly diagnose, isolate, and resolve issues.
1.
Re-start the D16.
2.
If operating from a battery,
a.
Clean the battery contacts and reapply a good quality dielectric
grease
b.
Replace the battery
c.
Change to a USB power source
Otherwise, if operating from USB power,
d.
Move to a different USB port, or to a USB wall charger. USB ports
located on the front of some PCs are usually hubs and power may be
limited.
3.
If none of the steps above resolve the problem, replace the sensor if one is
available. An H10 sensor rarely causes an electrical problem; however,
contacts on the sensor may become contaminated.