Model 2000 Series DewPrime
Dew Point Hygrometers
-----------
Operating Instructions
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3.1 KEYPAD
IDENTIFICATION
able 3-1
sts
each
fthe
keys
o
the
Model
-
-:
2000
Senes DewPrime Dew Pomt Hygrometer
front.panel
(Figure
3-1) and
gives
a
brief description
of
OUT
[HI
jLO
View and/or change temp
of
analog 5 volt (20 ma)
output.
View and/or change temp
of
analog 0 volt (4 ma)
output.
their
functions.
A
detailed description
of the
keypad
operation is
presented
in
subsection 3.3.
Table 3-1.
Identification
of
keys
on
front panel
keypad.
Key
Function
MODE
Toggle
temperature units.
ENT
Enter a new value for any of
the
above.
RSET
Cancel flashing alann lights in
latch
mode.
ALMI
J
ALARM 1 View and/or change Alarm
1
·
temperature
setting.
IL
1
View and/or change Alarm
1
latch
status.
Fl'JNC
I TIME
I DATE
lAVE
I
BAUD
I
OT.JT
JNT
View and/or
change time.
View and/or
change date.
View and/or
change
number of
temperature readings
to
be
averaged.
View and/or
change
the baud
rate.
(300,1200,2400,4800,9600,
19200).
View and/or
change
R.S-232
ourpm interval
(sees).
ALM2
I
ALARM
2 View and/or change Alarm
2
tempemure setting.
[
L 2 View and/or change Alarm 2
latch
status.
ESC
Use to cancel a mistake or leave
parameter without making
any
change.
VIEW
View the numeric value of
the
parameter
on the LED
display.
Start
manual
ABC
cycle.
PABC i·ABC ST View and/or
change
Amo
ABC
start
time.
1
ABC JNT View and/or
change
Auto
ABC
time
interval.
j-HOLD Toggle hold
on/off.
Tum on/off MAX
HEAT.
Tum on/off MAX
COOL.
>,+and<,-
>,
<
used as
initial
entry for setting
a.larms.
+,-used
as second
a1ar.m
entry and
for
initial
entry for setting output
r.mge.
3.2 KEYPAD LOCKOUT
SECURITY
The Model 2000
Series
has a digital
security
code
that
can lock out
tmauthorized
or
casual
users.
In
applica-
tions where the
Model
2000
Series
is on a
control
loop,
security
of
instrument
setup is
critical.
Initially
,
the
instrument
is
shipped
from the factory
in
the UN-
LOCKED
status. The user must
proactively
LOCK
the
instrument,
i
f
desired.
When the
keypad
is
locked,
all keys are
rendered
inoperative.
Once
locked,
each time any key is
pressed,
the display will
indicate
LOCKED for
a
few
seconds,
and then
return
to the nonnal display.
IfLOCKED,
the
keypad will
remai
n
LOCKED even
i
f
the
instrument
power is
switched
on or
off.
The
lock/tmlock status
is similar to a
toggle switch,
where
the same
operation
will tum on or off the
digital
lock. To LOCK or
UNLOCK
the
keypad,
press
the
following
four keys
in
sequence:
"BLANK",
"MABC/4","ENT",
then "RSET/0"
·I
3-1
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