Measurement Consideration; Rs232 Data Bus Output; Battery Replacement - Extech Instruments 407445 Instruction Manual

d) Press "RECALL" once, the "AVG" indicator along with the average value will appear
on the LCD display.
e) To disable the "Data Record" function, press "Record" again. The display indicators
"REC", "Max", "Min", "AVG" will disappear.
4.8 Simplified operational flow diagrams:

5. MEASUREMENT CONSIDERATION

5.1 The meter is designed with an "Auto shut off" feature to preserve battery life. The
meter will automatically shut down after 10 minutes of non-use. To disable this
feature, press the "RECORD" key to engage the record function.
5.2 It may be necessary to adjust the display contrast due to a change in viewing angle or
voltage drift. Use the "LCD Contrast adjustment" located on the right side of the
meter to set the preferred contrast.

6. RS232 DATA BUS OUTPUT

The meter is designed with a built-in RS232 serial data port. This interface was designed
to operate with the Extech Data Acquisition Software (p/n 407000) and enables the user to
capture, store and display readings on a PC. For more information, contact Extech or refer
to the manual accompanying the software for details on the interface.
7. BATTERY REPLACEME NT
7.1 The low battery indication appears as a "LBT" on the left corner of the display. When
the "LBT" appears, replace the battery as soon as possible. Reliable readings can be
obtained for several hours after the first appearance of the low battery indication.
7.2 To replace the battery:
a) Remove the battery compartment cover using a small coin or screwdriver and
remove the battery.
b) Replace with a new 9V battery (heavy duty type) and reinstall the cover.
c) Make sure the battery cover is secured after changing the battery.
3 407445es Ver. 1.04 9/99