Set Mode; Setting The Relative (Rel) Reference Value; Setting The Real Time Clock/Elapsed Timer; Setting The Alarm High/Low Limits - Extech Instruments 421502 User Manual

SET Mode

Manually Setting the Relative (REL) Reference Value
Note: Refer to the Relative Mode section for setting the temperature reference value
automatically, using the currently displayed temperature as the reference value.
To set the reference manually and to then use the Relative Mode, press the "SET" button;
the display will show dashes " - - - -". Enter a reference temperature using the numeric
buttons. You must use leading zeros; for example, enter 0050.0 to for a 50.0
temperature. Once the reference value is entered, press the "ENTER" button four times.
To display the difference between the actual temperature and a manually entered
Relative value, press the REL key and then the SET key. The meter will now display actual
temperature minus the reference temperature. Press the "REL" button to exit the mode.

Setting the Real Time Clock/Elapsed Timer

Press the "SET" button and then the "ENTER" button. Set the Hours, Minutes, and
Seconds (HH:MM:SS) using the numeric buttons. When editing is complete, the clock will
start to run. Press the "ENTER" button three times to exit. Use the "SEC/MIN" button to
switch between Hours/Minutes (Min) and Minutes/Seconds (Sec) display modes.

Setting the Alarm High/Low Limits

Press the "SET" button and then press the "ENTER" button twice. Set the desired High
Alarm limit using the numeric buttons. You must enter the value using all 5 digits,
including leading zeros. Example: 25.0
Press the "ENTER" button once. Set the Low Alarm limit using the numeric buttons. You
must enter the value using all 5 digits, including leading zeros. Example: 5.0
as 0005.0. Press "ENTER" to exit.
To activate the high/low alarms, press the "HI/LO Limits" button, the meter will beep, and
the audio icon will appear. The meter will produce a continuous tone when a high or low
alarm limit is reached. Press the "HI/LO Limits" button to silence the alarm (see Alarm
Operation section below for more information).
o
C is entered as 0025.0.
5
o
reference
o
C is entered
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