System Reset; Battery Replacement - Extech Instruments 407119-NIST User Manual

Advance Programming Mode
From the Air Velocity mode of operation, press and hold the SET button until the meter beeps and a
'1' is displayed. The advanced programming mode is now accessed. The Auto Power OFF
Enable/Disable and the Temperature Units selections are available in the advanced programming
mode. Use the ESC button to exit this mode at any time.
Auto Power Enable/Disable
The first parameter in the advanced mode is the Auto Power OFF enable/disable. Use the up and
down arrow keys to select the desired value. '0' defeats the Auto Power OFF feature; '1' enables the
Auto Power OFF feature. Momentarily press the SET button to move to the next parameter
temperature units (see below).
Temperature Units selection (C/F)
The second parameter in the advanced mode is the Temperature Units selection. Use the up and
down arrow keys to select the desired value. '0' selects degrees 'C'; '1' selects degrees 'F'. Press
the Rec/Enter button to confirm temperature selection. Press the ESC button to exit the advanced
programming mode.

System Reset

If the meter's display 'locks up' and/or the button presses do not cause the display to change, try a
system reset. To reset the meter, use one of the following methods.
1. Move the probe lock switch from the ON to the OFF to the ON position again. Turn the meter on.
2. While powering the meter, press the RESET switch (side compartment) using the point of a
paper clip.
PC Interface
The 407119 is equipped with a 3.5mm jack (side compartment) for connection to a PC for data
acquisition purposes. The meter's data output is a 16 bit data stream. For streaming of data to a PC
via the RS232 Output jack, the optional 407001-USB kit (RS232 to USB cable and driver CD) along
with the 407001 software (available free at www.extech.com) are required.

Battery Replacement

When the battery icon appears on the lower left corner of the LCD display, the four (4) 'AA' batteries
must be replaced.
1. Remove the rear Phillips head screw
2. Slide off the rear battery compartment
3. Replace the batteries
4. Secure the battery compartment
Never dispose of used batteries or rechargeable batteries in household waste.
As consumers, users are legally required to take used batteries to appropriate
collection sites, the retail store where the batteries were purchased, or wherever
batteries are sold.
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