5
2.4 Display
Figure 1 illustrates all the items that can appear on the display. The
upper row of the display (1) is used for reporting the % T levels and to
provide user guidance in the customer setting routine. The lower row
of the display (2) is used to communicate error messages and provide
user guidance. All error messages will be added to a queue along with
the units (%T). The display has two icons (3) that are used to indicate
the use of access code and offset mode. In addition, mode arrows
(4) are used to indicate the current instrument operating mode; AUTO
(normal operation), CAL (calibration) and CONFIG (configuration).
2.5 Touch Pad
Figure 2 illustrates the touch pad.
MODE/EXIT
,
,
and
. The
MODE/EXIT
button is used to cycle between the three operational
modes of the instrument:
CAL
,
CONFIG
and
AUTO
(Measurement)
Mode. The
button enters the option (or mode that is highlighted or
chosen). The
and
buttons are used to change settings.
Figure 1 – Display used in the instrument
All items used on the display are shown in this figure
3.0 Installation and Commissioning
Prior to use for the first time, the supplied desiccant pouch
will need to be installed. Refer to section
9.2 Replacing or
Installing the Desiccant Pouch.
3.1 Mounting and Site Selection
The instrument is designed for wall mounting. For ease of service there
should be about 20 cm (8") free area above the instrument; this will ensure
enough room for calibration and cuvette maintenance. Choose a location
that is easily accessible for operation and service and ensure that the
front display rests at eye level. The overall mounting dimensions of the
instrument are shown in Figure 3. The recommended mounting screws
are M6 (¼") for the instrument enclosure and M4 (
3
⁄
16
") for the field terminal
box. The AccUView LED is designed to have the field terminal box cradled
under the sensor portion of the instrument. It is recommended that the
field terminal box be mounted first, and then the rest of the instrument be
mounted on top. The template included on the last page of this manual
may be used to establish mounting-hole locations.
Figure 2: The AccUView LED touch pad
2.6 Vapor Purge
The AccUView LED is equipped with a continuous vapor purge system.
A replaceable desiccant pouch in the lower portion of the instrument
dries the air. System heat is used to warm the air. A fan inside the
instrument continuously circulates heated dry air around the optical well
and the flow through cuvette. This feature eliminates the need for a dry
purge line.
The AccUView LED monitors the replaceable desiccant pouch
condition continuously. The LCD display will show
DESC
on the
lower line in the event that the desiccant pouch needs replacement.
Replacement desiccant pouches are available from HF
scientific, or the local representative (Part # 21555R). Refer
to section
9.2 Replacing or Installing the Desiccant Pouch
Figure 3: Overall Mounting Dimensions of the Instrument
It is critical that the instrument be mounted as close as possible to the
sampling point to ensure a quick response time (within 2-3 meters (6-10 ft)
of the sampling point).
Provide at least 200mm
(8 inches) of free space
for easy removal of the
flow head and insertion of
the calibration standards
All dimensions are in
millimeters (inches)
These 4 holes will
accept up to M6
(1/4 inch) hardware
207.65
(8.175)
50.80
(2.000)
90.17
(3.500)
These 2 holes will
accept up to M4
(
3
⁄
16
inch) hardware
87.33
(3.438)
30.17
(1.188)
147.66
(5.813)
131.16
(5.164)
347.16
(13.668)
61.77
(2.432)
196.85
(7.750)
