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User Manual
5.4 Adjustable Eyepiece
315011
e
Fig. 11
5.5 Optical Focus Ring
315012
g
Fig. 12
315013
h
Fig. 13
5.6 External Connection Socket
i
Fig. 14
Page 10
The Adjustable Eyepiece (e) is on the rear face of the
thermometer (see Fig. 3, item 11).
The eyepiece allows you to view the scene being
measured by the thermometer. The eyepiece can be
adjusted manually to match each user 's eyesight
characteristics (See section 6.6).
The Optical Focus Ring (f) is on the lens assembly at
the front of the thermometer (see Fig. 3, item 3). The
focus ring allows you to manually adjust the lens
assembly and sharpen the scene in view.
f
The focal range is 1m/39.4in (as measured from the
instrument datum) to infinity, which equates to
approximately 90° of rotation. The datum mark (h) is
on the instrument label on the right-hand side of the
thermometer.
As standard, the thermometer is supplied with two
protective windows. The clear window is for general
use, and the dark window is for use where temperatures
in the scene are likely to exceed 1200° C/2192° F.
A protective lens cap (g) is supplied and should be fitted
at all times when the thermometer is not in use.
The External Connection Socket (i) is on the left-hand
side of the thermometer handle (see Fig. 3, item 8).
The socket has two main functions: it allows an external
power source to be connected to the thermometer, and
it enables the thermometer to interface with an IPAQ or
laptop, giving datalogging facilities via serial RS232
315014
communications.
The protective rubber cover should be fitted at all times
when the socket is not in use.
Wahl DHS520
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