![PeakTech 4950 Operation Manual Download Page 40](http://html.mh-extra.com/html/peaktech/4950/4950_operation-manual_1517694040.webp)
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Select the temperature units (°C or °F) by using the
°C/°F switch
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To lock the unit on for continuous measurement,
slide the middle switch LOCK ON/OFF right. If the
trigger is pulled while the unit is locked on, the laser
and backlight will be turned on if they have been
activated. When the unit is locked on, the backlight
and laser will remain on unless it is turned off using
the Laser/Backlight button on the keypad.
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To activate the alarms, please slide the bottom
switch SET ALARM right.
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To set values for the High Alarm (HAL), Low Alarm
(LAL) and Emissivity (EMS), firstly active the display
by pulling the trigger or pressing the MODE button,
then press the MODE button until the appropriate
code appears in the lower left corner of the display,
press the UP and down buttons to adjust the desired
values.
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