38 • Chapter 5: User Mode and Calibration
04 Series for CO(-H2)
Tips for Using User Mode
•
To scroll from one item to the next, press and release AIR. To reverse the scrolling
direction:
a. Press and hold AIR.
b. Immediately press POWER MODE and then release both buttons.
c. The scrolling direction returns to the original direction when you exit and reenter a
menu.
•
To skip an item when a question is asked, press and release AIR.
•
To enter an item and to save any changes, press and release POWER MODE.
•
To change a flashing parameter, press and release AIR. To reverse the direction of change
(ie. from increasing to decreasing or vice versa):
a. Press and hold AIR.
b. Immediately press POWER MODE and then release both buttons.
•
To exit an entered item without saving a change, press and hold AIR and POWER MODE
for a few seconds.
Performing a Bump Test (BUMP)
Bump test the instrument before each day’s use with a known concentration of the target gas.
The instrument does not need to be calibrated unless it does not pass the bump test.
To bump test the CO-04C, you need:
•
Calibration gas cylinder (RKI Instruments recommends using 50 ppm CO but any
value between 15 ppm and 2,000 ppm can be used)
•
0.25 LPM fixed flow regulator
•
Non-absorbent tubing
•
Calibration cup
1. Confirm that the CO-04C’s calibration gas value matches the concentration listed on the
calibration gas cylinder as described on pg.49.
2. Confirm that the regulator knob is turned all the way clockwise. Screw the 0.25 LPM
fixed flow regulator onto the calibration cylinder.
