Model2000
Serie
s
DewPrime
Dew Point Hygrometers
-----------
Operating Instructions
----------
3.7.4 ABC
Start Time
Press
the ENTER key on the
computer
keyboard.
''Enter
Command
(H
for
Help)
:"
is
displayed.
Type the
letters
"AS" and press the ENTER key.Enter the
time
"Hours:Mmutes,
"
and
press the
ENTER ke
y
.
3.7.5 ABC
Interval
Press
the
"Enter''key
on the
computer keyboard. The
'
'Enter
Command (H for
Help:"
is
displayed.
Type
the
letters
"AI'' and press the EN1ER
ke
y
.
Type
the time
in
"Hours:Mmutes"
and press the
ENTER key.
3.7.7 Analog
Output
(Low)
(High)
This parameter sets the 0-5 volt and
4-20
.ma
(analog)
lower and
upper
output
range.The
instrmnent range
is
-50to+lOOOC.
NOTE
A plus
(+)
sign is not needed
for
positive
temperature
entries, but
a
negative (-) sign is
necessary
.
If
programming a positive
temperature
via the front panel, a plus
(+)
sign
is
Example:
If
the
ABC Start Time is
08:00
(8
o'clock
in
the
moming)
and the
ABC
Interval is 2:00, the first .ABC
cycle
would occur at 8:00 AM and
every
two hours
thereafter.
required
.
Press the
ENTER
key on the computer keyboard
The
"Enter
Command
(H for
Help):"
prompt
is
displayed.
Type the letters "AO" and press the ENTER
key.
Enter
3.7.6 Alarm
1
and
Alarm
2
These are the relays
that
can be set to operate at
predeter-
mined dew point
limits.
Each
relay can be set as a high or low set point by use
of
the greater than ">"
and
less
than
"<.,
symbols
.
Each
can also be set to latch when a limit is
exceeded.
In
the latch mode, the
a1aim
will remain active even
if
the
alarm condition returns to nonna.l. To cancel the
alarm,
the operator must
press
the RESET button on the
keypad.
If
the
latch mode is not set, the relays will
deactivate
when
the
a1ann
conditio
n
is
COITeCted..
In
this
case,
however, the front panel
a1aim
indicators
will
flash
to
alert the operator of an alarm that has
occurred,
but has
been
corrected
The RESET button on the keypad
will
reset the
indicators.
To enter the alarm limit
s
:
Press the
ENIER
key on the
computer
keyboard
The "Enter Command (H for
Help)
:
"
i
s
displayed
Type the letters
"A1"for
alarm 1 or
"A2"
for alarm
2
and press
ENIER.
Enter the set point beginning with the
>
or <
symbol
followed by the sign and value of the
a1.an
n
limit.
When
completed, press the ENTER
key.
the limits with
a
plus or
minus
sign first, then the
lower
temperature
,
a
space,
and the positive or negative upper
temperature.
Press the ENTER key to record the
values.
Example
:
-33[sp]45 gives a low value
of-33°C
and a high value of
+450C.
3.7.8 Baud
Rate
The available baud rates in the Model 2000 Series
are:
19200,9600,4800,2400,
1200,or300
NOTE
Both the
Model2000
Series and the
computer must be set to the same baud
rate for communication to take
place
.
If
the unit is not
communicatin
g
properly,
check the
Model2000
Series' baud
rate
setting via the front panel and set
the
communications software to
match
the
Model2000
Series. Also verify that
the
data
fOimat
is correct (i.e., Data Bits
=
8, Stop Bits
=
1, Parity
Bit=
N)
.
3-7
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