Rae QRAE PLUS PGM-2000, Operation & Maintenance Manual

Page: 49 / 88

PROGRAMMING
4-11
LEL pick OXY
2. Oxygen Calibration :
a) Press the [MODE] key twice to move to OXY, then
press [Y/+] to select the highlighted OXY sensor and
start the calibration.
b) If the oxygen calibration type is 3-point calibration (see
Section 4.3.6 on oxygen calibration type), that is 20.9%
(air), 0% (99.9% N
2
), and 19.5% calibration, the display
shows:
Apply Oxygen?
Y - 0% N - 19.5%
c) If the oxygen calibration type is 2-point calibration that
is 20.9% (air), and 0% (99.9% N
2
) calibration, the display
shows:
Apply Oxygen?
Y - 0%
d) If the [Y/+] key is pressed, the display shows “Apply 0%
oxygen…” turn on the flow of the 99.9% nitrogen or other
inert gas. After a count-down on the calibration timer, the
display shows:
O
2
cal’ed
Reading = 0%
e) Press the [N/-] key for the 19.5% oxygen calibration in 3-
point calibration mode.
2. Follow the instructions on the display and turn off the gas
when finished.