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from the computer. A serial communications option board is required in the
meter. If such a board is not installed or no serial data is received, the meter
displays
rESEt
.
Reset
There are three types of Reset:
Peak Reset. Achieved by simultaneously pressing the
RESET
and
PEAK
keys.
Latched Alarm Reset. Achieved by simultaneously pressing the
RESET
and
ALARMS
keys.
Meter Reset. Causes the meter to reinitialize and take a tare reading when
set up for
auto-tare
. Achieved powering up the meter, by pressing the
RESET
and
MENU
keys simultaneously, stepping through all top-level
menu choices, grounding a rear panel connector, or supplying an ASCII
command.
rESEt
is displayed briefly.
RS485 Half Duplex
Serial communications implemented with two wires, allowing data transmission
in both directions, but not simultaneously.
RS485 Full Duplex
Serial communications implemented with four wires, allowing data transmission
in two directions simultaneously.
Run Mode
The normal operating mode of the meter,
where readings are taken, as opposed to the
menu mode
.
Scale
A constant multiplier used to go from A/D
converter counts to displayed counts. This is
the slope term
m
in the straight line formula
y = mx + b
, where
y
is the displayed reading
in counts,
m
is the scale factor,
x
is the
measured reading in counts, and
b
is the
offset. For direct readout in (milli)volts or
(milli)amps, scale is 1.
Scaling
The process of setting
scale
and
offset
so that the meter reads properly in
engineering units (such as psi).
Scaling, Coordinates of 2 Points Method
A scaling method where four numbers are entered manually: low input, desired
reading at low input; high input, and desired reading at high input. The meter
then applies a straight line fit. The decimal point is set by the separate
dEC.Pt
menu item.
Scaling, Scale and Offset Method
A scaling method where
scale
and
offset
are entered manually.
Scaling, Reading Coordinates of 2 Points Method
A scaling method, where the low and high input values are determined from
actual signals. A known low signal is first applied to the meter, such as the
output of a pressure transducer at zero pressure. That signal is captured as the
Summary of Contents for LAUREATE Series
Page 27: ...27 SERIAL CONNECTION EXAMPLES...
