Extech EX810 Bedienungsanleitung Seite 13

Non-Contact Infra Red Temperature Measurements
Set the function switch to the IR Temp position.
I.
Aim the infrared sensor (rear of the meter) at the
2.
surface to be measured.
Press theo button in the center Ofthe rotary
3.
function switch to turn on the laser pointer and
identify the surface spot to be measured.
The area of the surface to be measured
4.
larger than the spot size as determined by the
distance to spot size specification.
Read the temperature in the display.
5.
Note: See the "Temperature Units" paragraph to select OFor oc
WARNING: Do not directly view or direct the laser pointer at
an eye. Low power visible lasers do not normally present a
hazard, but may present some potential for hazard if viewed
directly for extended periods of time.
IR Spot to Distance Diagram
The 8:1 spot to distance ratio determines the size of the measured surface area with
respect to the distance the meter is held away from the surface.
Diameter of spot
(1.25cm)
0.5"
(10cm)
(20cm)
Distance to object
IR Measurement Notes
1. The object under test should be larger than the spot (target) size calculated by the field
of view diagram.
If the surface of the object under test is covered with frost, oil, grime, etc., clean before
2.
taking measurements.
If an object's surface is highly reflective, apply masking tape or flat black paint to the
3.
surface before measuring.
4. The meter may not make accurate measurements through transparent surfaces such
as glass.
5. Steam, dust, smoke, etc. can obscure
6. To find a hot spot, aim the meter outside the area of interest then scan across (in an
up and down motion) until the hot spot is located.
must be
thS *ture
CAUTION
LASU UNUwuo SUÆ "TO
(7.5cm)
(2.5cm)
3"
(60cm)
measurements.
10 EX810-830-EU_ENG V3.0 4/05
Data Hold
To freeze the LCD reading, press the HOLD button. While data hold is active, the HOLD
icon appears on the LCD. Press the HOLD button again to return to normal operation.
Peak Hold
The Peak Hold function captures the peak AC or DC voltage or current. The meter can
capture negative or positive peaks as fast as 1 millisecond in duration.
Tum the function switch to the A or V position.
I.
Use the MODE button to select AC or DC (ADC EX830 only).
2.
3. Allow time for the display to stabilize.
Press and Hold the PEAK button until "CAL" appears in the display. This procedure
4.
will zero the range selected.
5. Press the PEAK button, Pmax will display.
6. The display will update each time a higher positive peak occurs.
7. Press the PEAK button again, Pmin will display. The display will now update and
indicate the lowest negative peak.
8. To return to normal operation, press and hold the PEAK button until the Pmin or
Pmax indicator switches off.
Note: If the Function switch position is changed after a calibration the Peak Hold
calibration must be repeated for the new function selected.
MAXIMIN
Press the MAXIMIN key to activate the MAXIMIN recording mode. The display icon
1.
"MAXI' wilt appear. The meter will display and hold the maximum reading and will
update only when a new "max" occurs.
2. Press the MAXIMIN key and "MIN" will appear The display icon "MIN" will appear. The
meter will display and hold the minimum
"min" occurs
Press the MAXIMIN key and a blinking "MAX MIN" will appear. The meter will display
3.
the present reading, but will continue to update and store the max and min readings.
To exit MAXIMIN mode press and hold the MAXIMIN key for 2 seconds.
4.
Temperature Units CF I •C)
The temperature units selection switch is located in the battery
compartment. To change the units, remove the battery door, lift out
the battery and set the switch for the desired units.
WARNING: To avoid electrical shock, disconnect
any circuit, remove the test leads from the input terminals, and turn
OFF the meter before opening the case. DO not operate the meter
with an open case.
LCD Backlight Button
The LCD is equipped with backlighting for easier viewing, especially in dimly lit areas. Press
the backlight button to turn the backlight on. Press again to turn the backlight off.
Automatic Power OFF
In order to conserve battery life, the meter will automatically tum off after approximately 25
minutes. To turn the meter on again, tum the function switch to the OFF position and then to
the desired function position.
reading and will update only when a new
Units Switch
the meter from
EX81C-WEU_ENG V3.0 4/05
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