Wahl DHS 520 Quick Start Manual

1 Introduction
About the DHS 520/520B
The Wahl DHS520/520B is a highly
accurate, portable, short wavelength infrared
thermometer, designed to measure and display
temperatures in the range 550 to 3000° C/1022
to 5432°F.
About this Quick-Start Guide
This Quick-Start Guide provides you with
information on how to start using your
Wahl DHS520 thermometer. By following
the instructions in this guide, you will be able to:
• Insert the battery and switch on the unit
• Focus the optical system correctly
• Measure the temperature of a target
• Change the emissivity value
• Select the units of measurement
For more detailed information on the full features
and capabilities of the Wahl DHS520/520B, refer to
the User Guide.
2 Thermometer Components
1
2
3
4
5
6
7
8
9
1 LCD display panel 7 Trigger switch (2 position)
2 Display scroll keys 8 Digital output socket cover
3 Optical focusing ring 9 Tripod mounting hole
4 Protective window 10 Wrist strap
5 Lens cap 11 Eyepiece
6 ON/OFF buttons 12 Battery compartment cover
5 M Measuring Temperature
CAUTION
When viewing targets at temperatures
above 1200°C/2192°F, a dark filter
must be fitted to the lens assembly.
Refer to the User Guide.
1) Look through the eyepiece at the target.
2) Ensure that the target completely fills the
spot defined by the reticule.
3) Adjust the main focusing ring
the target scene to the sharpest possible
focus on the reticule circle.
4) Press the thermometer trigger
The target temperature is displayed in the
viewfinder and also on the side LCD display
panel
1
3 Inserting a Battery and Switching On
The Wahl DHS520 thermometer is
12
powered by a 9V dry cell battery. A Duracell
6LR61/12232 (or equivalent) battery is
supplied with the thermometer.
11
To fit the battery:
1) Ensure that the thermometer is switched
OFF.
10
2) The battery cover is on the top surface of
the thermometer body
3) Slide open the cover to reveal the battery
compartment.
4) Insert the battery correctly (refer to the label
inside the compartment).
5) Slide the battery cover back into place
6) To switch on the unit, press the [ I ] button
6
Note
It i s r ec om m ended t hat a f ull y
charged spare battery is kept with the
thermometer at all times.
6 Changing the Emissivity Value
This section of the guide shows you how to
change the Emissivity value to 0.83.
1) With the thermometer switched on,
↵
press the key on the side LCD display
panel
2
The Exit menu option is highlighted.
2) Press the ↓ key once to highlight the
Emissivity menu option
↵
3) Press the key.
The current Emissivity value is displayed.
4) Use the ↑ or ↓ keys to set the Emissivity
value to 0.83.
↵
5) Press the key to return to the menu
options.
6) Press the ↑ key once to select the Exit
3
to bring
menu option and press
The new Emissivity value is now set.
7
4 Focusing the Optical System
11
The eyepiece
the thermometer and view the scene
being measured. The target is precisely
defined by the reticule circle in the
center of the viewfinder.
The eyepiece must be focused manually
match your eyesight characteristics:
1) Remove the lens cap!
2) Look through the eyepiece and focus
12
on a plain, brightly lit background.
3) Rotate the eyepiece to bring the
reticule circle to the sharpest focus.
It is now adjusted to your eye.
Reticule
7 Selecting the Units of Measurement
This section of the guide shows you how
to change from measuring in °C to ° F.
1) With the thermometer switched
on press the
display panel
2
The Exit menu option is highlighted.
2) Use the ↑ or ↓ keys to highlight the
ε
Units menu option. The thermometer is
set to ° C as a default.
↵
3) Press the
are displayed (° C, ° F, K, ° R).
4) Use the ↑ or ↓ keys to select the
°F (Fahrenheit) option.
↵
5) Press the
menu options.
↵
6) Use the ↑ or ↓ keys to scroll to the
Exit menu option and press
The units of measurement are
now changed to ° F.
allows you to look into
5
↵
key on the side LCD
key. The Unit options
key to return to the
↵