Quick Steps - Extech Instruments Quick Start Quick Start Manual

Introduction
The 42280A is a portable, battery operated instrument that moni-
tors, displays, and logs Temperature and Relative Humidity (RH).
The 42280A can monitor environmental conditions in a variety of
residential and commercial storage and in-transit locations.
The 42280A logs up to 48,000 readings for later PC transfer and
generates comprehensive reports that include detailed statistical
analyses with high/low alarms.
Download the User Manual from the support site for detailed in-
structions and additional language translations:
https://support.flir.com

Quick Steps

Install four (4) AA batteries in the rear compartment. An
optional 9 V adapter is available.
Short press the power button to switch on the 42280A.
Temperature is shown on the top display row, RH on
middle row, and date/time on bottom. Short press the
DP button to show the Dew Point on middle row. Short
press the MAX/MIN button to step through the highest
(MX), lowest (MN), and current readings. Long press
the MAX/MIN button to reset the MAX/MIN memories.
Configure the logger using a PC or the 42280A keypad, per the instructions in
the following sections, and then return to this section.
Long press the START/STOP button to start logging.
The green recording LED and the REC display icon will
flash. If you set a Start Delay in the configuration proc-
ess, the REC icon will not flash until the delay time
elapses.
Place the logger in the area to be monitored.
Long press the START/STOP button to stop logging.
The recording LED and REC display icon will switch off.
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