4
OPERATION AND USE – QUICK START GUIDE
1. Remove the instrument from the soft pouch and any necessary accessories.
2. Press and hold the A button until the instrument powers on. The LED dome will illuminate
and the SENSIT logo will be shown on the display.
3. In clean air, allow the instrument to go through the startup sequence, warmup, and Autozero.
This typically takes around 30 seconds, but if the battery was disconnected it can take up
to 5 minutes.
4. An automatic ow block test may be prompted during startup. If so, place your nger over
the inlet at the end of the gooseneck and wait until the test passes. This should happen
within 5 seconds. If ow block cannot be achieved, contact SENSIT Technologies for
assistance.
If the automatic ow block test is not prompted during startup, perform this test after the
Autozero is complete and the work display is shown. FLOW BLOCKED will be displayed.
NOTE: If any FAIL messages occur during the Autozero, ensure that the instrument is in clear
air, and attempt the zero again by pressing and holding the Cbutton until AUTOZERO
is shown on the display. Contact SENSIT Technologies if the instrument cannot pass the
Autozero.
5. The work display will be shown with gas readings. Up to (5) total gasses can be shown from
the following: EX, CO, O2, H2S, HCN, SO2. If equipped with
the TC sensor, the combustible gas reading will automatically
scale into the percent volume range after the LEL range.
6. Once the work display is shown with no fail messages, and a
ow block check has been successfully done, you are ready to
use the instrument.
7. Following federal, state, municipal, and/or company procedures, conduct the leak
investigation, survey, or other procedures as needed.
8. If the source of an odor or known leak needs to be pinpointed, use the TICK feature. To
enable, press and release the Bbutton to enter the quick menu. Press and release the B
button again to enable tick.
An audible ticking sound will be heard. Move the end of the gooseneck towards the area
suspected of leakage. As you get closer to the source, the tick rate will increase. Press and
release the Bbutton or roll back the thumb wheel to decrease the tick. Press and release
the Abutton to deactivate.
9. Any NSC reading shown on the display indicates a “non-standard combustible” gas has
been detected.
Any NSR reading shown on the display indicates a “non-standard response”, which means
the instrument has detected a non-combustible gas that it isn’t calibrated for.
10. To zero out very small levels of gas, press and hold the Cbutton until autozero is shown on
the display. This should only be done to set the instrument zero to your working environment,
(e.g. to zero out a small level of CO on a street with heavy vehicle trafc). The instrument
will not allow a zero if unsafe levels of gas are present and will show a fail message.
11. When your investigation is complete, press and hold the Abutton until the instrument
displays POWER OFF SHUTDOWN.
