1. Install the batteries by pushing down
the locking tab and sliding the handle
away from the top of the instrument. When
replacing handle be sure the tab is securely
in place.
2. IMPORTANT: CAREFULLY OBSERVE
POLARITY WHEN CHANGING BATTERIES.
Incorrect installation can damage an internal
“factory service only” fuse.
3.
Locate button “A” – push & hold until
the unit powers up, then release the power
button.
4. Allow unit to go through the warm up
sequence in clean air. At the end of warm
up, the unit will auto zero and enter the
working display. This requires from 40 up
to180 seconds.
5. If FAIL is displayed for any of the sensor
readings, make sure the instrument is in
clean air; push and hold the “C” button until
AUTO ZERO is displayed. If this process
does not clear the fail on the display, this
could indicate a problem with the instrument
or sensor.
6. Look at the display – HCN (and optionally
CO) readings are displayed.
7. Alarms will activate at the preset limits.
8. Be sure the short tubing and filter disc are
attached to the back of the instrument.
9. When being used in excessively hot areas
attach the hot air probe assembly to the ¼
turn twist connection on the filter located on
the back of the instrument.
10. Place your finger over the inlet of the
probe and wait ~5 seconds for “FLOW
BLOCKED” to appear on the display. Check
for tight connections if it does not show
“FLOW BLOCKED”.
11. You are now ready to use the instrument.
You can now enter the area and detect gases.
12. When performing HCN/CO checks in
high temp areas do not exceed prolonged
exposures (over 5 min) at 500°F.
13. Press and hold the “C” button to zero
the instrument. (only in a gas free area).
14. When your investigation is complete
push button “A” and hold for 5 seconds until
the instrument displays “POWER OFF” then
release to shut off.
SENSIT
®
HCN
QUICK-START INSTRUCTIONS
