46 • Overview Beacon 410 Gas Monitor Operator’s Manual
Chapter 8: Calibration Mode
Overview
This chapter describes how to calibrate the Beacon 410’s active channels using
Calibration Mode. In Calibration Mode, you can:
• Set the calibration timeout.
• Perform a fresh air adjust on selected channels.
• Perform a gas adjust on selected channels.
• View Max Spans.
Table 9 below briefly describes the four operations that can be performed in Calibration
Mode. A more detailed description of each operation is given later in this chapter.
Calibration Frequency
Although there is no particular calibration frequency that is correct for all applications, a
calibration frequency of every 3 to 6 months is adequate for most Beacon 410
applications. Unless experience in a particular application dictates otherwise, RKI
Instruments, Inc. recommends a calibration frequency of every 3 months.
If an application is not very demanding, for example detection in a clean, temperature
controlled environment where a combustible or toxic gas is not normally present, and
calibration adjustments are minimal at calibration, then a calibration frequency of every 6
months may be adequate.
If an application is very demanding, for example if a combustible or toxic gas is present
often and in significant concentrations or the environment is not well controlled, then more
frequent calibration than every 3 months may be necessary. For combustible gas
detection using catalytic combustion type detectors, if potential catalyst poisons are
known or likely to be present, more frequent calibration than every 3 months will be
necessary.
Table 9: Calibration Mode Functions
Operation Description
SET CAL TIMEOUT The calibration timeout sets the amount of time after the last
button push while in Calibration Mode that the Beacon 410 will
wait before automatically returning to normal operation.
PERFORM AIR ADJUST This operation allows you to set the fresh air reading of the
selected channel(s) to zero (20.9% for an oxygen channel)
PERFORM GAS ADJUST This operation allows you to set the response reading of the
selected channels with calibration gas.
VIEW MAX SPANS This operation gives a measure of how much gas response
adjustment remains on a direct connect type channel by
allowing you to view the maximum possible adjustment on gas
during the most recent calibration for each channel.
To Next Page
