TSI IAQ50 User Manual
Page 11
11
ON/OFF Key
Press the ON/OFF key to turn the in-
strument on and off. When the instru-
ment is first turned on, it goes through a
preprogrammed power-up sequence
that includes an internal self-check
(when all displayable items are shown).
The Model IAQ50 begins by displaying
percentage of battery life remaining
(accurate for alkaline batteries only), the
percentage of memory available, baud
rate, time (HH.MM) and entered baro-
metric pressure. At this point, the Model
IAQ50 will start measuring CO
2,
tem-
perature and % relative humidity.
If a problem is detected, the display will
show “CAL” to indicate that it should be
returned for service and/or calibration.
Note: To skip the start-up display, press and
hold ENTER at any time during the power-
up sequence.
CO
2
Key
The Model IAQ50 will automatically
start in CO
2
mode. To return to this
mode from another measurement pa-