6
P3.0 screen. Press SET to enter “P3.1” to set the real time
clock. The year will be blinking. Press “LOG
S
” or “MIN/MAX
T
”
to set the year. Press the SET button to save the setting, or ESC
to exit without saving. Repeat for (P3.2) month, (P3.3) day,
(P3.4) 12/24 hour, (P3.5) hour, and (P3.6) minute.
P4.0 Reset
From the P1.0 display, press “LOG
S
” three times to reset the
A160 to default settings. Press SET to enter “P4.1” to reset the
settings. Press “LOG
S
” or “MIN/MAX
T
” to change to “Yes”.
Press the SET button to save the setting, or ESC to exit without
saving.
CO
2
Manual Calibration
Manual calibration should be done outdoors on a sunny day with
fresh air and plenty of ventilation, resulting in a CO
2
value of
about 400 ppm. Do not calibrate on a rainy day because high
humidity will affect the CO
2
level. Do not calibrate in places with
crowds of people or in the vicinity of high concentration CO
2
sources such as ventilation outlets or fireplaces.
Place the A160 in the calibration site and turn it on. Press and
hold “SET”, “LOG
S
”, and “MIN/MAX
T
” for at least 1 second to
enter CO
2
calibration mode. “400ppm” and “CO
2
” will be blinking
on the LCD. Wait about 30 minutes. The blinking will stop after
the calibration completes. Press and hold “RESET” for more
than 1 second to exit the calibration process.