Extech Instruments AN310-NIST User Manual page 4

Brief Keypad Description
Press momentarily to switch the meter ON or OFF. Press and hold this button for 2
seconds to enter or exit the Setup mode (refer to Setup mode section for details).
SET
o Press momentarily to freeze the displayed reading (HOLD icon switches ON); press
HOLD
MAX/MIN
again momentarily to exit the HOLD mode (HOLD icon switches OFF)
o Press and hold for 2 seconds to display the MIN (minimum) reading; press and hold
again to display the MAX (maximum) reading; Press and hold a third time to exit
o This button is also used in the AVERAGE mode (for recording readings one at a time
or for a 'timed' recording session) and in the SETUP mode (for configuring the
meter). Please review the AVERAGE and SETUP mode sections for details
U/mode
Press momentarily to toggle RH and Air Velocity readings. Press and hold for 2 seconds
AVG
▲
to access the Multi‐Point Average and Timed Average modes (the AVG icon switches
ON). Detailed instructions for these modes are provided later in this guide. In the
Setup mode press to select a category or to increase a value (refer to Setup mode later
in this guide)
L/mode
▼
Press to toggle the lower display between air temperature, air volume, wet bulb
temperature, and dew point temperature readings; Also used in the Multi‐Point
Average, Timed Average, and Setup modes; refer to the AVERAGE and SETUP modes
sections later in this guide
U/mode
AVG
+
▲
With the meter switched OFF, press and hold these two buttons to disable
Auto Power OFF. Detailed AUTO POWER OFF (Sleep mode) instructions are
provided later in this guide
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