RKI Instruments Beacon 110 User Manual
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Beacon 110 Operator’s Manual
Calibrating a 4 - 20 mA Detector Head
If a 4-20 mA detector head is installed on the Beacon 110, proceed as follows:
1.
The display will be alternating between CAL AT AMP and the current gas reading as
described above.
2.
Verify that the detector head is in a fresh-air environment. (If necessary, use a zero-
emission air cylinder, also known as zero air, to introduce a fresh-air sample when
adjusting the fresh air reading below.)
3.
Adjust the detector head’s fresh air reading (sometimes referred to as the zero
reading for non-oxygen detector heads). See the detector head operator’s manual for
instructions on how to adjust the fresh air reading.
4.
Apply calibration gas to the detector head’s detector and adjust the detector head’s
span reading (zero reading for oxygen). See the detector head’s operator’s manual for
instructions on how to adjust the span reading (zero reading for oxygen).
5.
Press and release the ENTER button to indicate that you are done with calibrating the
detector head. The display will indicate Leaving CAL Mode for a few seconds.
6.
The display will now alternate between the normal operation screen and the message
REMOVE CAL GAS for 1 minute. If the calibration gas has not been removed from
the detector, remove it now to avoid unwanted alarms.
During this 1 minute period, the 4 - 20 mA output will remain fixed at 3.5 mA (17.4 mA
if an oxygen detector head is installed) and the relays will remain in their non-alarm
state to avoid unwanted alarms while the calibration gas clears from the detector. At
the end of the 1 minute period, the REMOVE CAL GAS message will stop appearing
and the Beacon 110 will return to normal operation.
Calibrating a Direct Connect Detector Head
If a direct connect detector head is installed on the Beacon 110, proceed as follows:
1.
The display will indicate FreshAir Adjust? as described above in “Entering
Calibration Mode”.
2.
If you want to skip adjusting the fresh air reading, press and release the DOWN/NO
button. The display will indicate SPAN w/Cal Gas? (ZERO w/Cal Gas? for an oxygen
detector head). Skip the next step and continue with step 4.
If you want to continue with adjusting the fresh air reading, press and release the UP/
YES button. ENTER will alternate with FreshAir on the top display line and the
current gas reading will be on the bottom display line.
3.
If the detector is in a fresh air environment, press and release the ENTER button. The
Beacon 110 will perform a fresh air adjustment and the display will indicate SPAN w/
Cal Gas? (ZERO w/Cal Gas? for an oxygen detector head).
If you suspect the detector area is not a fresh air environment, apply zero air to the
detector before pressing the ENTER button to perform the fresh air adjustment. See
the detector head operator’s manual for instructions to apply zero air to the detector.
The Beacon 110 will freeze the display reading at the lowest level reached while
applying zero air (highest level for an oxygen detector head). After applying zero air
for the required amount of time, usually two minutes, remove the zero air source from
the detector. Press and release the ENTER button at the Beacon 110. The Beacon
110 will perform a fresh air adjustment and the display will indicate SPAN w/Cal Gas?
(ZERO w/Cal Gas? for an oxygen detector head).