HT instruments HT3310 User Manual
Page 8
HT3301-HT3310
EN - 7
4.4.2. Switch °C / °F, LOCK ON/OFF and SET ALARM
LEGEND:
1. C/F
2. LOCK ON/OFF
3. SET ALARM
Fig. 4: Description of internal switch
In order to access to the switches perform the herewith steps:
1. Open the battery cover and extract the internal battery
2. Select the temperature units (°C or °F) by using the °C/°F switch
3. Slide the middle switch LOCK to lock the instrument on for continuous measurement. If
the trigger is pulled while the switch LOCK is set to 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
4. To activate the alarms, please slide the bottom switch SET ALARM right. 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.