Model
2000
Series DewPrime
Dew
Poin
t
Hygrometers
-----------Operating
Instructions-----------
measurement
parameter in order to select it
for
output.
2.
Pres
s
VIEW
key.The
display key will
read:
XX
IDGH, the upper limit of the
selected measurement
parameter.
3. Press VIEW key again to
display
the present
high
setting.
4.
Enter
the
desired high
value.
Pres
s
ENT to store
the
high value.
(Note
:
for
positive
numbers, including
zero, a
"+"
must
preceed
the number, otherwise
an
ERROR
message will
appear
on the
display.)
The
display will now
read
XX LOW,the lower limit
of
the measurement
panunete
r
.
5. Press VIEW key again to display the present
low
setting.
6. Enter the
desired
low value.Press ENT to store
the
low value
number.(Note:for positive numbers,
including
zero
,
a "+" must
preceed
the
IDmlbe
r
,
otherwise
an ERROR message
"9.'ill
appear on
the
display.)
LED display and the digits scroll to
the:
'left
.
If
the
above
order is not followed, the system
returns
to
normal
operation. After
ALARM
x is
displayed,
pressing
the
ALM key again will display the status of that
Alarm's
latch.
Pressing
VIEW will then toggle the Latch
mode.
ESC:
Thi
s
key is
used
to return to normal
operation
after viewing any
parameter
or setting, with no
changes
made
.
NOTE
IfESC is·not
pressed, the
Model2000
Series automatically
returns
t
o
.
normal
operation
after
about 10
seconds
of
no
keypad
activit
y
.
3.4 FRONT PANEL
INDICATORS
Table
3-2lists
each
of the
indicators
on the
Model2000
Series front panel (Figure 3-1) with a brief
description
of
their
:functions
.
A detailed
description
of the
indicators
is
presented in
subsection
3.5
.
Table
3-2.Identification
of
front
panel
indicators.
ENT
:
If
a
change
is
being
made
to
any
parameter,
this
key enters the new value shown on the LED display
to
the memory
nonvolarile
.
If
a mistake is made, the
ESC
Indicator
Function
key can be
pressed
instead
to cancel any changes
in
process
.
If
the
proposed
change is not valid
(e
.
g.,
hour
>24), the LED displays ERROR after ENT is
pressed
and returns to normal
operation.
RSET:
Thi
s
key tums off the
flashing
Alann LEDs. A
8-cbaracter alpha-
nmneric
display
Nonnally
displays
the
dew
display temperature but can
be used to view all operating
p8I3Dleters
storedwithin
the
Model 2000
Serie
s
.
flashing
alarm light
indicates
that the
temperature value
has
exceeded
the
a1mn
values and the Alarm is
in
the
10-LED
BARGRAPH Indicates status of the Sensor
CONTROL
control.
Latched
mode.
ALMl,ALMl:
These keys allow viewing
and/or
changing
the
type (high or low) and the temperature
of
the two
a.lm:ms.
The
two
alarms
are
completely indepen-
dent of each other.The first press of one of these
keys
displays
ALARM
x.
Pressing
VIEW shows the type
and
temperature
of that alarm and
enables
a change to
be
entered,
if desired. All alarm
entries
must begin with a
>
or
<
key, followed by a + or
-
key,
followed
by
the
temperature
value. The decimal point is fixed on
the
ALARMl
and
ALARM2LEDs
ABC LED
CONTAMINATED
LED
Indicate
s
statu
s
of
alarms
.
ON=latched
Indicates
status of
Automatic
Balance Control
cycle.
ON= in ABC
mode.
Indicates inability
of ABC
cycle
to
balance
system
and clean
the
mirror.
3-4
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