TEL-TRU QT4242L Operating Instructions

(Default Screen)
Simply aim the thermometer at the measure target with Lens ( ) and pull Trigger ( ) to display the
surface temperature. The Distance:Spot ratio is at least 30:1. The two laser points highlight the measured
target spot diameter. Make sure the measured target area exceeds the field-of-view.
:
NOTE
The thermometer will automatically shut OFF if left idle for more than 60 sec.
FUNCTION
Press Emissivity key ( ) for setting the emissivity
Press Emissivity key ( ), then press Up key ( ) or Down key ( ) to adjust emissivity, then press Mode
key ( ) to confirm it. The emissivity can be changed from 0.10 (10E) to 1 (100E).
Press Mode key ( ) for scrolling more display function as follows.
Show the current emissivity value (the default emissivity is 0.95).
Press Mode key ( ) for the Maximum (MAX), Minimum (MIN), Difference between MAX and MIN (DIF)
and Average (AVG) modes. During the measurement, the particular Mode temperature reading will be
displayed beside the Mode icon.
Press Up key ( ) or Down key ( ) key to change the High Alarm (HAL) or Lo Alarm (LAL), then press
Meas. key ( ) to confirm it. For example: When the reading 26.9
you will hear a beeping sound.
ADD VALUE
Press Up key ( ) for LOCK mode ON/OFF. The lock mode is particularly useful for continuous
In MAX, MIN, DIF,
monitoring of temperatures for up to 60 minutes.
AVG mode:
Press Down key ( ) for
and press Up key ( ) for backlight function ON/OFF.
In all modes: First
hold on the Meas.
and press Down key ( ) for laser function ON/OFF.
key ( )
(Flash light can be turned on in the same time as laser)
Q T 4 2 4 2 L T h e r m
Q T 4 2 4 2 T h e r m
Keep away from children. Do not use for medical applications.
o o
C or F transferred.
o m e t e r O p e r a t i
o m e t e r O p e r a t i
o
C < LAL 27
n g I n s t r u c t i o n s
n g I n s t r u c t i o n s
o
C, the Low icon will flash and