RKI Instruments EAGLE 2 Manual - Manual (Page 66)

56 • Calibration Supplies and Equipment EAGLE 2 Operator’s Manual
Calibration Supplies and
Equipment
To calibrate the EAGLE 2, you will need:
• Known calibrating samples of the gases being detected. The combustible
and toxic gas samples should have concentrations between 10 and 50% of
the full scale value. For example, if you are calibrating the catalytic
combustible gas channel, your calibration cylinder should have a
combustible gas concentration between 10% LEL and 50% LEL. An
oxygen-free source, such as 100% nitrogen is recommended for setting
the oxygen zero.
NOTE: The catalytic combustible channel can be set up for and calibrated to
a number of different combustible gases. See “Configuring the
Combustible Gas” on page 108 for instructions. Be sure that you are
using an appropriate calibration cylinder for the target gas of the
catalytic combustible channel.
CAUTION: When using auto calibration with the standard 4-gas EAGLE 2,
although the EAGLE 2 can be calibrated with an oxygen
concentration of up to 19.5%, RKI Instruments, Inc.
recommends that the multi-gas cylinder have an oxygen
concentration in the range of 10% - 16% oxygen.
• A demand-flow regulator to provide adequate sample gas flow
• Non-absorbent tubing
• A 24 inch humidifier tube if you are calibrating the catalytic combustible
channel with a gas concentration of 1000 ppm or lower
WARNING: If you are using a calibration kit that includes a gas bag and
a fixed flow regulator or dispensing valve, do not apply gas
directly to the EAGLE 2 with the regulator or dispensing
valve or damage to the pump will result. See “Appendix A:
Calibrating with a Sample Bag” on page 86 for instructions
to properly use a gas bag kit.
To calibrate the %LEL, oxygen, CO, and H
2
S sensors at the same time,
automatically, with no need for a zero-oxygen source, you can use the auto
calibration feature with a 4-gas cylinder. If the H
2
S channel is not active, then
a 3-gas cylinder may be used for auto calibration. This chapter includes
instructions for auto calibration with a demand-flow regulator and a 4-gas