RKI Instruments Eagle 1 Manual User Manual
Page 66
59 • Appendix C: Non-Standard Toxic Gas Sensors
Eagle Instruction Manual
CAUTION:
Some Eagles equipped with non-standard toxic gas sensors
include a special plastic inlet fitting that requires a Teflon
sample hose. The standard hose with metal fittings cannot be
used with these Eagles. Using a standard sample hose for these
applications will result in inaccurate gas readings for the toxic
gases. Gases that require the plastic inlet fitting and Teflon
sample hose include ozone, hydrogen fluoride, hydrogen
chloride, and chlorine dioxide.
Keeping Fresh Batteries in a Non-Standard Toxic Eagle
The non-standard toxic sensors require a bias voltage to be applied to
them at all times, even when the Eagle is turned off, to maintain
proper operation. This bias voltage is maintained even when the Eagle
is turned off as long as the batteries in the Eagle have enough voltage
to operate the Eagle (4.5 volts or greater). Once the batteries are
drained to the point that they will not operate the Eagle, they will no
longer provide a reliable bias voltage to the non-standard toxic
sensors. When the Eagle indicates a dead battery alarm, change the
batteries as soon as possible to maintain the bias voltage.
If the Eagle is stored for an extended period, check the battery voltage
periodically by turning on the Eagle and scrolling through Display
Mode to the Battery Voltage screen. If the battery voltage is close to
being considered dead, 4.5 volts, replace the batteries. A set of
batteries with full capacity will maintain a bias voltage on non-
standard toxic sensors in a stored Eagle for at least 3 months. RKI
Instruments Inc. recommends that you check the battery voltage on a
stored Eagle that includes non-standard toxic sensors monthly to
insure that the batteries are not dead.
WARNING: If the non-standard toxic sensors are allowed to be
without a bias voltage for an extended period, they will
deteriorate and no longer operate properly. Be sure to
keep fresh batteries in the Eagle when it is not being used
or if it is stored.
Calibrating Non-Standard Toxic Gas Sensors
Recommended calibration frequency for non-standard toxics sensors
is 3 to 6 months. Use the Single Calibration method to calibrate non-
standard toxic gas sensors as described in the Calibration section of
this manual with the following exception.
1. At the Single Calibration screen, press the SHIFT/▼ button to