RKI Instruments Eagle Series - Manual (Page 67)

Eagle Instruction Manual Appendix C: Non-Standard Toxic Gas Sensors • 60
scroll down to the appropriate gas, then press the
POWER/ENTER button.
2. Screw the regulator to the appropriate calibration cylinder.
3. Connect the tubing from the regulator to the Eagle’s probe. Allow
2 minutes for the reading to stabilize.
4. If necessary, use the AIR/▲ (increase) and SHIFT/▼ (decrease)
buttons to adjust the reading to match the concentration listed on
the calibration cylinder.
Go to the next section, “Adjusting the sensor potentiometers,” if
you are unable to match the reading to the concentration of the
cylinder.
5. Press the POWER/ENTER button to set the span value. SINGLE
CALIBRATION END displays, then the Single Calibration menu
displays.
6. Disconnect the tubing from the probe.
7. Unscrew the regulator from the calibration cylinder.
8. With the Single Calibration menu displayed, press the SHIFT/▼
button until the prompt is next to the last channel, then press the
SHIFT/▼ button again. The
ESCAPE message displays.
9. Press the POWER/ENTER button to return to the Calibration
menu.
10. Press the SHIFT/▼ button to place the prompt next to the
NORMAL OPERATION menu option, then press the POWER/
ENTER button to return to the normal screen.
Adjusting the Sensor Controls
CAUTION: Only perform the following steps if you are unable to set the
correct calibration reading with the AIR/
▲ and SHIFT/ ▼
buttons.
1. Use the AIR/▲ and SHIFT/▼ buttons to set the reading to the
middle of the range in which you can currently adjust the reading.
For example, if you can set the reading from a minimum of 1.0
ppm to a maximum of 3.0 ppm, set the display to 2.0 ppm.
2. Unscrew the two large screws on the top of the case, then carefully
lift the top of the case and lay it aside.
3. Locate the sensor in the front half of the bottom case. The sensor
with wires connected to EC3 on the analog PCB displays its