Model 421509 Version 1.1 09/04
6
Shift Mode
The operating functions for the shift mode are printed in yellow on the buttons. When in
normal mode, push the SHIFT button to switch to shift mode. The word “Shift” will be
displayed in the lower right corner of the LCD. To switch back to normal mode, press the
SHIFT button again.
°C/°F Key
Readings can be displayed in degrees Celsius (°C) or degrees Fahrenheit (°F). Note that
the meter remembers the unit of measure when it is turned off. Press the °C/°F key to
change the temperature units.
SAVE Button
The save function stores T1 and T2 measurements in up to 128 locations in non-volatile
memory. Press the SAVE button to store the current reading, the word “SAVE” is
momentarily displayed on the bottom right LCD to indicate that the data has been saved.
Data can be read using the read function in normal mode.
LOG Button
The data log function continuously records measurement data using the stored sampling
interval. The time interval is set using the interval time setup function [INTV] in the setup
mode.
Press the LOG button to activate the log function. “LOG” will be displayed and “MEM” will
continuously flash on the LCD. There are 16 groups that are used for storing the log data
and each group has 64 data locations. If the current session exceeds 64 locations, the log
function will automatically use the next group to continue storing the data. A maximum of
1024 locations can be saved in one log session.
Press the LOG button again to exit the data log function.
CLR ? Button
The CLR function clears all the saved and logged data in memory. When the CLR button is
pressed, “MEM” is displayed and “CLR” flashes on the upper right of the LCD.
Press the overlay “ENTER” button to clear all saved and logged data, or the “ESC” button
to exit the function.
REL Button
Press the REL key to enter the Relative mode. The meter will store the displayed reading
(main display) as a reference value and display ‘REL’. All subsequent readings will now
display the measured value less the stored reference value.
Press the REL key again to exit the relative mode.
[APO] Button
Press the APO button to enable/disable auto power off. “APO” is displayed on the upper
left of the LCD. When enabled, it will automatically turn the thermometer off if the key
switch is inactive for the preset auto power off time (default time for APO is 5 minutes). The
time can be programmed in Setup Mode. Press the Power button to resume operation.
Type Button (Main display
Press the TYPE button to select the thermocouple type (K, J, T, E, R, S, or N) in the main
display. If the inputs of the main and second display are the same, then pressing this
button will change the thermocouple type for both displays. The selected type becomes the
default selection.
Type Button (Second display)
Press the TYPE button to select the thermocouple type (K, J, T, E, R, S, or N) in the
second display. If the inputs of the main and second display are the same, then pressing
this button will change the thermocouple type for both displays. The selected type
becomes the default selection.
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