Technical Data; Care And Cleaning - VOLTCRAFT LWT-04 Operating Instructions Manual

c) Switching on/off
• Briefly press the button (4) to switch the measurement device on or off.
• When you switch it on, all elements will appear on the LCD display (5) for a few seconds.
The measured value is then displayed.
• The measuring device switches off automatically after approximately 5 minutes of inactivity.
d) Calibration
You will need the standard solution (1413 μS) at a standard temperature of 25 °C in order to
calibrate the product.
1. Remove the protective cap (2).
button (4) to switch on the device.
2. Press the
3. Use the probe tip (8) to stir the solution until a stable value is displayed on the LCD display (5).
4. Use the screwdriver to turn the calibration screw on the left-hand side of the battery com-
partment until the display shows a reading of 1.41.
It is not necessary to calibrate the device before each use. However, it should be
calibrated every 2 weeks / 10 measurements.
e) Making measurements
1. Remove the protective cap (2).
2. Rinse the probe tip (8) with clean water and wipe it dry (if you calibrated the device).
button (4) to switch on the measurement device.
3. Press the
4. Dip the probe tip (8) approx. 2 - 3 cm into the liquid that you want to measure. Gently stir
the liquid with the measuring probe (7). It may take a while for the measurement to stabilize.
Read the measurement on the LCD display (5).
5. If the measured value is outside of the measurement range, "----" will appear on the LCD
display (5).
6. Rinse the measurement probe (7) with distilled water after use.
7. Screw the protective cap (2) into place.
f) Changing the measurement probe (7)
1. Loosen the screw cap (3) in a clockwise direction.
2. Remove the used/damaged probe (7) from the measuring device.
3. Attach the new probe to the meter.
4. Turn the screw cap anticlockwise until it is securely in place.

Care and cleaning

• This product does not require any maintenance, except for changing the batteries and
cleaning the measurement probe. Do not attempt to disassemble the product (except for
the actions described in these instructions, such as changing the measurement probe).
• Clean the product carefully using a soft, clean cloth. Do not press too hard on the display,
as this may result in scratch marks or damage its function.
• Only use distilled water (e.g. deionized water) to clean the measurement probes. Using
other liquids may affect the measurements. Only use paper towels to dry the measurement
probes.
• Never use aggressive detergents, rubbing alcohol or other chemical solutions, as these
may damage the casing or cause the product to malfunction.
Disposal
a) Product
Electronic devices are recyclable waste and must not be placed in household waste.
At the end of its service life, dispose of the product according to the relevant statu-
tory regulations.
Remove any inserted batteries and dispose of them separately from the product.
b) Batteries
You are required by law to return all used batteries (Battery Directive). They must not
be placed in household waste.
Batteries that contain hazardous substances are labelled with this symbol to indicate
that disposal in domestic waste is forbidden. The abbreviations for heavy metals in
batteries are: Cd = Cadmium, Hg = Mercury, Pb = Lead (indicated on the battery,
e.g. below the waste icon on the left).
Used batteries can be returned free of charge to local collection points, our stores or battery
retailers.
You thus fulfil your statutory obligations and contribute to environmental protection.

Technical data

Power supply ................................ 2x 3 V/DC lithium batteries
LCD display .................................. 21 x 18 mm
Measurement range ..................... 0 - 19.9 EC (0 - 19.9 mS)
Accuracy ....................................... ±1 % FS
Resolution ..................................... 0.1 EC (0.1 mS)
Temperature correction ................. Automatic (ATC)
Protection rating ........................... IP57
Operating/storage conditions ........ 0 to +50 ºC, <85 %
relative humidity (non-condensing)
Dimensions (Ø x H) ...................... 37 x 168 mm (measuring device)
Weight .......................................... 85 g (measuring device with batteries)
This is a publication by Conrad Electronic SE, Klaus-Conrad-Str. 1, D-92240 Hirschau (www.conrad.com).
All rights including translation reserved. Reproduction by any method (e.g. photocopying, microfilming or capturing in elec-
tronic data processing systems) requires prior written approval from the publisher. Reprinting, also in part, is prohibited.
This publication reflects the technical status at the time of printing.
Copyright 2019 by Conrad Electronic SE. *1763395_v2_0819_02_DS_m_4L_(1)