UNI-T UT305S, User Manual

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30
@
1500
1
.
2
@
60
0
.
8
@
40
0
.
8
@
12
20
@
300 mm
inch
20
@
1000
D:S=50:1
D
S
Low Alarm Limit Setting
In the HOLD interface, pressing the "SET" button twice will enter the low alarm limit setting interface. The user can
use ▼ or “▲” to adjust the value. Short pressing will add or subtract 1 to the value each time, and long pressing “ ”
will add or subtract 10 each second.
Emissivity Setting
In the HOLD interface, pressing the "SET" button three times will enter the emissivity setting interface, and then
pressing the " " button can quickly select the preset values (P1-P5). If there is no wanted value among the
preset values, the user can use " ▼" or “▲” to adjust at any of the preset values that is closest to the wanted one.
Short pressing will add or subtract 0.01 to the value each time, and long pressing will add or subtract 0.1 each
second.
Temperature Unit Setting
In the HOLD interface, pressing the "SET" button four times will enter the temperature unit setting interface. The
user can use " ▼" or “▲” to convert the unit °C/°F.
Sound Alarm Setting
In the HOLD interface, pressing the "SET" button five times will enter the sound alarm setting interface. The user
can use "▼" or “▲” to turn on/off this function.
Lock Measurement Setting
In the HOLD interface, pressing the "SET" button six times will enter the lock measurement setting interface. The
user can use "▼" or “▲” to turn on/off this function.
When the function is turned on, pressing button can set the lock measurement timing "00:00", and the selected
time position will flash. The user can use "▼" or “▲” to adjust the value. If the user needs to turn off the timing
function, set it to "00:00" and then it will jump to display "--:--".
D: S (Distance to Spot Ratio)
As the distance (D) between the thermometer and the measured target increases, the light spot diameter (S) of
the measured area also increases.
The relationship between measurement distance and light spot diameter is shown in the figure below.
The light spot diameter represents
90% of the energy in the circle
Field of View
When measuring, make sure that the measured target is larger than the light spot diameter . The smaller the target, the
closer the test distance should be (refer to D: S for the detailed light spot diameter). It is recommended that the measured
target be larger than twice the light spot diameter of the thermometer.
Good
So-So
Bad
Target > Light spot
T=S
T < S
diameter (S)
Emissivity
Emissivity represents the material energy radiation. The emissivity of most organic materials, painted or oxidized surfaces
is about 0.95. The user can use masking tapes or flat paints to cover the metal surface, use the high emissivity setting,
and then wait for a period of time to make the surface temperatures of the tapes/flat paints and the covered object the
same. At this point, the surface temperature of the tapes/flat paints is equal to the metal surface temperature. The
following table shows the total emissivity ε of some metals and non-metals.
Aluminum
Oxide
A3003 Alloy
Oxide
Crude
Brass
Polishing
Oxide
Cuprum
Oxide
Electrical terminal board
Hastelloy
Alloy
Inconel
Oxide
Abrasive blasting
Electropolishing
Ferrum
Oxide
Rusting
Ferrum (casting)
Oxide
Non-Oxide
Casting
Ferrum (forging)
Passivating
Plumbum
Crude
Oxide
Molybdenum
Oxide
Nickel
Oxide
Platinum
Black
Steel
Cold rolling
Burnishing
Polishing
Zinc
Oxide
Non-Metals
Asbestos
Asphalt
Basalt
Carbon
Non-Oxide
Graphite
Carborundum
Ceramic
Clay
Concrete
Cloth
Glass
Convex glass
Smooth glass
Nonex
Sheet material
Gypsum
Ice
Limestone
Paper
Plastic
Water
Soil
Wood
Measured surface
Metals
Emissivity
Maintenance
Cleaning
Blow away the fallen particles with clean compressed air, carefully wipe the lens surface with a moist swab, and
clean the shell with a moist sponge or soft cloth. Be careful not to rinse with water or immerse it in water.
Replace Battery
电池
电池盖
Battery
Battery cover
Install or replace a 9V battery (1604A) according to the following steps:
1.Remove the battery cover
2.Install the battery (pay attention to the polarity)
3.Close the battery cover
Phenomenon
Display OL
Display -OL
Display Err (startup)
Battery symbol flashes
Laser is not working or dark
Inaccurate measurement
Cause
Measured value > maximum range
Measured value < minimum range
Exceed the minimum or
maximum operating temperature
Low battery
Low battery
Unmatched emissivity, too far
measurement distance, diameter
of the measurement target<20mm
Measure
Stop measuring
Stop measuring
Place the thermometer at -5°C-50
(23°F-122°F) for 30 minutes °C
Replace batteries
Replace batteries
Refer to Field of View, D:S and
other instructions in this manual
Troubleshooting