Backlight; Cleaning And Maintenance; Technical Specifications - Velleman DVM440 Bedienungsanleitung

Push the Laser button to switch the laser pointer ON. The laser pointer is only used for aiming. When
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the laser is on, the laser icon appears appear on the LCD. Aim the red beam approximately 1 cm below
the point of test. Pressing the Laser button again turns the laser off.
Select the temperature units using the °C/°F button.
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4. Release the trigger. The reading will hold for approximately 7 seconds. The devices shuts off automatically
after 20 seconds.

Backlight

When backlight is on, any operation activates the backlight for about 7 seconds.
Distance-to-spot ratio (D:S)
The device's distance-to-spot ratio is 12:1.
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The distance-to-spot ratio (D:S) is the ratio of the
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distance to the object and the diameter of the
temperature measurement area.
For instance if the D:S ratio is 12:1, measurement of
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an object 120 cm away will average the temperature
over a 10 cm area.
7. Battery
Replace the battery when the battery low icon
you pull the trigger.
The battery is located in the hand grip.
1. Pull open the hand grip.
2. Insert a battery.
Only use appropriate batteries (see Technical Specifications below).
Respect the polarity.
3. Close the battery cover.
Warning
• Keep batteries away from children.
Do not puncture batteries or throw them in fire as they may explode.
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Do not attempt to recharge non-rechargeable batteries (alkaline).
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Dispose of batteries in accordance with local regulations.
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8.

Cleaning and Maintenance

• The sensor lens is the most delicate part of the thermometer and should be kept clean at all times.
• To do this, only use a soft cloth or cotton bud with a little water or medical alcohol.
Allow the lens to fully dry before using the thermometer.
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Wipe the other parts of the thermometer regularly with a moist, lint-free cloth. Do not use alcohol or
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solvents.
Do not submerge the thermometer in water or any other liquid.
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• There are no user-serviceable parts.
• Contact your dealer for spare parts if necessary.
Storage temperature: see technical specifications.
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9.

Technical Specifications

measurement range
operating temperature
storage temperature
accuracy
resolution
response time (90 %)
emissivity range
V. 01 – 17/04/2014
DVM440
appears on the display or if the device does not light when
-32 °C to 350°C (-26 °F to 662 °F)
0-50 °C (32-122 °F)
-20 °C to 65 °C (-4 °F to 149 °F)
± 1.5 % or 1.5 °C (2.7 °F)
0.1 °C / 0.2 °F
0.5 second
0.95 fixed
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