Instruction manual

or the calibration cap (if a pump was not used).
• The instrument then automatically returns to the
Measure Gas mode.
NOTE: The autocalibration procedure adjusts the span value
for any sensors which pass the test. Sensors that
fail autocalibration are left unchanged.
NOTE: Since residual gas may be present, the instrument
may briefly go into an exposure alarm after the
calibration sequence is completed.
• If Autocalibration span
sequence fails, the
(FIGURE 2-42)
display appears.
• To view which sensor(s) failed,
press ON/OFF (SHOW) button.
• Instrument displays the
expected gas values
(FIGURE 2-43) and displays
if sensor reading
(FIGURE 2-44) was:
• OK
• LOW or
• HIGH.
If a sensor fails the calibration, this
does not necessarily indicate that the
sensor is no longer functional. In
order to ensure that proper
calibration gases were used (TABLE
2-1), the Autocalibration only
adjusts sensors that were initially
within 30% of the expected values.
If the sensor fails Autocalibration,
the calibration sequence given in
the FiveStar Technical Manual
(P/N 710440), Chapter 2, may be
used to manually adjust the sensor
to within specifications.
Figure 2-42.
Auto Cal Fail Show/OK
Figure 2-43.
Example of
Expected Gas Values
Figure 2-44.
Example of Expected Values
with OK/LOW/HIGH
Chapter 2, Using the FiveStar Alarm Instruction Manual
2-22 FiveStar Alarm