RKI Instruments Beacon 110 - Manual (Page 41)

Beacon 110 Operator’s Manual 37
4. If you want to skip adjusting the span (zero for an oxygen detector head) setting, press
and release the DOWN/NO button. The display will indicate Leaving Cal Mode and
the Beacon 110 will return to normal operation.
If you want to continue with adjusting the span setting, press and release the UP/YES
button. APPLY will alternate with SPAN Gas (ZERO Gas for an oxygen detector
head) on the top display line and the current gas reading will be on the bottom display
line.
5. Apply calibration gas to the detector. See the detector head operator’s manual for
instructions on how to apply gas to the detector.
When calibration gas is applied, the Beacon 110 will freeze the display gas reading at
the highest level reached while the gas was applied (lowest for an oxygen detector
head).
6. After applying calibration gas for the required amount of time, usually two minutes,
remove the gas from the detector. The Beacon 110 will continue to display the
maximum gas response (lowest for an oxygen detector head) on the display and
retain the response level in its memory.
7. Adjust the gas reading up or down to match the calibration gas cylinder concentration
by using the UP/YES and DOWN/NO buttons, then press and release the ENTER
button.
NOTE: If calibrating an oxygen detector head and a cylinder other than a 100%
nitrogen (0% oxygen) cylinder is used to set the zero reading, such as a
cylinder with 12% oxygen, set the zero reading to match the cylinder’s oxygen
concentration.
8. The Beacon 110 will perform a span (zero for an oxygen detector head) operation.
The display will indicate SPAN Gas PASS (ZERO Gas PASS for an oxygen detector
head) for a few seconds, then indicate SPAN Gas SAVED (ZERO Gas SAVED for an
oxygen detector head) before indicating Leaving CAL Mode for a few seconds.
9. 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.
10. Store the components of the calibration kit in a safe place.