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900D4D Manual
displays, A1 and A2 are driven by the total volume, and A3
and A4 are driven by the interface volume. For dual displays,
A1 and A2 are driven by the left volume, and A3 and A4 are
driven by the right volume. The display shows the alarm
number, the polarity, high or low set point, and the alarm
set point. Each alarm now has two points for activating and
deactivating the alarm, a high point and low point. The alarm
will be activated when the display goes above the high set
point but will not be deactivated until the display goes below
the low set point. For example, for alarm 1 high set at 535.4
barrels with the alarm contacts closed (alarm active) when
the product level is below the set point (contacts open/alarm
inactive at the set point and above), the display would read
“A1HC 535.4”
. Another example, for alarm 3 low set at 45.2
barrels with the alarm contacts open (alarm inactive) when
the product level is below the set point (contacts closed/
alarm active at the set point and above), the display would
read
“A3LO 45.2”
.
4.
Press ↑
UP
or ↓
DOWN
to move the alarm set point up or
down. Each time the button is pressed the point is moved
by one inch. To get close to a point quickly, there are five
speed buttons: press
4
to increase by 10 inches, press
1
to
decrease by 10 inches, press
5
to increase by 50 inches, press
2
to decrease by 50 inches, or press
0
to set the alarm point
to zero. To toggle the polarity (alternate between closed and
open) press the decimal point button.
5. Press
ENTER
to store the new alarm setting,
“Stor”
will be
shown momentarily.
6.
To access other alarm menus, press ↑↑
FAST UP
or ↓↓
FAST
DOWN
. If an alarm menu is left without pressing
ENTER
, any
change to that menu item will NOT be stored.
7. 4-20mA MENU:
To access the 4-20 mA menu, press ↓↓
FAST
DOWN
until the display shows “
4-20
” followed by some
volume amount. This menu is always labeled as 4-20 even
if the display is configured as 1-5V. The volume amount is
the full scale (20 mA) value. To obtain the scale, simply divide
this amount by 16 to get the number of barrels per mA. If
the 4-20 output is off, then the display will show “
4-20 OFF
”
indicating that the output is turned off. If the display has
been shipped with the 1-5V option, then 5 volts corresponds
to 20 mA.
8. Press the number buttons (and the decimal if required) to
enter the desired full scale 4-20 mA volume (that is, the value
in barrels for 20mA output); the existing value will disappear
and the new value will be shown. The decimal point location
must match the decimal point for the calibration, for example,
Summary of Contents for SeeLevel II 900-D4D DUAL
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