Velleman DVM439 Manuel d'utilisateur télécharger pdf (Page 4)

DVM439

V. 02 – 14/10/2013 4 ©Velleman nv

The distance-to-target ratio is 8:1. This means that, for example, at

8 cm, the target must be larger than 1 cm to get a proper measurement.

Make sure the target area is within this field of view.

The device can measure temperatures in °C or °F. Press the mode

key [2] while the device is on to switch between measurement units. The

corresponding symbol (°C or °F) appears on the display.

The maximum measured value is always shown at the bottom of the

display, next to the ‘MAX’ indicator.

When you release the measurement key [5], the hold mode is

automatically activated: the last measurement value remains on the

display until you press the measurement key again, or until the device

shuts off automatically (after approx. 15 seconds).

Note that the display is always on, while the laser is only on during

measurement.

7. Batteries

This device is battery-operated, using 2 type AAA 1.5 V batteries.

It incorporates a low battery indicator as follows:

Batteries OK: measurements are possible.

Batteries low: batteries need to be replaced, but measurements

are still possible.

Batteries exhausted: batteries need to be replaced, measurements

are no longer possible.

To replace the batteries, proceed as follows:

1. Wait until the device powers off automatically (about 15 s).

A malfunction may occur if you replace the batteries while the

device is on. In this case, reset the device. See ‘Troubleshooting’

for more information.

2. Open the battery compartment by sliding the battery cover [6]

downwards.

3. Replace the batteries by two new type AAA 1.5 V batteries.

4. Slide the battery cover back in place.

Warning: Do not puncture batteries or throw them in fire as they

may explode. Do not attempt to recharge non-rechargeable

batteries (alkaline). Dispose of batteries in accordance with local

regulations. Keep batteries away from children.

8. Troubleshooting

‘Hi’ or ‘Lo’ is displayed when the temperature being measured

is outside of the range of the device (see ‘Technical

Specifications’).

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Velleman DVM439 Manuel d'utilisateur Page 4