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Laurel Electronics provides
digital panel meters / controllers, totalizers, counters, loop-powered meters,
temperature meters, for all types of transducers or process indication &
control. |
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Laureate™
Dual-Channel Up/Down Totalizer
With two
independently scalable channels & presets\
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Features |
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Standard
Counter |
Independent,
scalable totals for Channels A & B. |
Totals
stored in non-volatile memory. |
Inputs
from NPN or PNP proximity switches, contact closures,
digital |
logic,
magnetic pickups down to 12 mV, or AC inputs up to 250
Vac. |
Up
counting from zero to preset value using positive scale
factor. |
Down
counting from preset to zero using negative scale factor. |
Data
rates up to 1 MHz. |
Isolated
5, 10 or 24 Vdc excitation supply to power sensors. |
Green
or red LED display. |
NEMA
4X front panel, 1/8 DIN case. |
Optional
dual relays, 4-20 mA & 0-10 V analog output, RS-232/485,
and parallel BCD output. |
Certified
to UL 3101-1, CAN/CSA-C22.2, EN 61010-1 (CE Mark). |
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Extended
Counter
All
capabilities of the Standard Counter, plus: |
Channel
A total and Channel B rate simultaneously. |
Up/down
counting on Channel A, using Channel B to control count
direction. |
Counting
on Channel A, using Channel B to inhibit counting. |
Arithmetic
functions A+B, A-B, A*B, A/B |
Click
to Order Laureate™
Dual-Channel Up/Down Totalizer
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Description |
| The
Laureate dual-channel up or down totalizer is a basic
operating mode of the Laureate counter with the FR dual-channel
signal conditioner board.
Each channel (A or B) may be independently set up and
scaled to count up from zero (or other value) to a preset
limit, or to count down from a preset value to zero
(or other limit). Countdown operation is set up by entering
a negative scale factor.
The six-digit counter display is capable of displaying
any value from -999,999 to 999,999 with programmable
decimal point. Scaling allows direct readout in engineering
units, such as gallons or cubic feet based on counts
from a turbine flowmeter, or the count of cans based
on the count of six-packs. The displayed channel (A
or B) is selected via a front panel pushbutton. The
totals are stored in non-volatile memory so as to be
retained in the absence of power.
The minimum recommended complementary option for the
Laureate totalizer is the dual setpoint controller output
board, which is available with either 10 A relays or
AC/DC solid state relays. |
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| Extended
Counter Capabilities |
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An
optional Extended counter version provides capabilities
beyond those of the standard counter
Rate and total simultaneously. Channel A can display
total while Channel B displays rate. The selection of
A or B for display is via a front panel pushbutton.
This mode is ideal for flow applications
Up/down counting. Channel A can serve as an up/down
counter, where the count direction is dynamically changed
by applying a signal to Channel B. For instance, Channel
A can count and scale pulses from a turbine flowmeter,
while Channel B inputs the direction of flow. This allows
total volume to be tracked in case of reversible flow
Totalizing with external inhibit. Totalizing by Channel
A can be temporarily inhibited by applying a signal
to Channel B. For instance, 60 Hz AC pulses can be counted
by Channel A and be scaled to display elapsed hours.
A signal can be applied to Channel B to start or stop
pulse counting when a process is in operation
Linearization of nonlinear inputs. Exceptionally accurate
custom curve rate linearization is achievable, for instance
to linearize the low flow end of turbine flowmeters.
For setup, up to 240 data points can be input into a
spreadsheet or text file by the user. The computer then
calculates nonlinear segments, which are downloaded
into the meter via RS-232. The linearized rate can then
be totalized by the Extended counter
Arithmetic functions. The Extended counter makes arithmetic
functions available, namely A+B, A-B, A*B, A/B and A/B-1.
These solve many applications. For instance, A+B allows
two input flows to be summed for total volume, while
A-B allows outflow to be subtracted from inflow for
net volume. A/B allows the mixing of ingredients in
a specified ratio. By monitoring and alarming the A/B
volume ratio, ingredient B can be added to A until the
proper ratio is achieved. |
| Universal
Signal Conditioner |
Other
Features and Options |
| The
dual-channel signal conditioner accepts inputs from
proximity switches with PNP or NPN output, TTL or CMOS
logic, magnetic pickups, contact closures, low-level
outputs from turbine flow meters down to 12 mV, and
high-level AC line inputs up to 250 Vac. Nine hysteresis
pairs are jumper selectable for reliable triggering with
different signal levels. A 1600 Hz low-pass roll-off
filter for noise reduction and contact debounce times of
3 ms or 50 ms are also selectable.
A built-in isolated 5, 10, or 24 Vdc excitation supply
can power proximity switches and other sensors, and
eliminate the need for an external power supply.
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Plug-in
isolated analog output, dual setpoint controller and
RS232/485 communications or BCD output boards can
upgrade the Laureate from a stand-alone monitor to
system interface and control. The ability of the
Laureate to output an isolated 4-20 mA signal which
tracks a total may be unique among totalizers. Laureates
meet NEMA 4X (IP-65) standards from the front when panel
mounted. |
Click
to Order Laureate™
Dual-Channel Up/Down Totalizer
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Specifications |
| Display |
Excitation
Output |
Readout |
6
digits, 7-segment, 14.2 mm (.56") |
5
Vdc |
5
Vdc ±5%, 100 mA max |
Color |
Red
or green LED |
10
Vdc |
10
Vdc ±5%, 120 mA max |
Range |
-99999
to +99999 XXXXEX scientific notation beyond 999999 |
24
Vdc |
24
Vdc ±5%, 50 mA max
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Indicators |
4
red LED lamps |
Output
isolation |
50
Vdc to meter ground |
Electrical
Connections |
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| Environmental |
Power |
Operating
Temperature |
0°C
to 55°C |
Voltage,
std.
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85-264
Vac and 90-370 Vdc
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Storage
Temperature |
-40°C
to 85°C |
Frequency
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DC
or 49-440 Hz
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Relative
Humidity |
95%
at 40°C, non-condensing |
Voltage,
opt. |
8-28
Vac and 9-37 Vdc
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Protection |
NEMA-4X
(IP-65) when panel mounted |
Power
isolation |
Safety-rated
to 250 Vac, meter ground to earth ground,
DC to 60 Hz, 4.2 kVp per High Voltage Test |
Inputs |
Types
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AC,
pulses from NPN, PNP transistors, contact closures,
magnetic pickups |
Selectable
Hysteresis |
(-12
mV to +12 mV), (+30 mV to +60 mV),
(-30 mV to -20 mV), (-150 mV to +150 mV),
(+350 mV to +600 mV), (-600 mV to -350 mV),
(-1.15 V to +1.15 V), (+1.25 V to +2.1 V),
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Signal
ground |
Common
ground for channels A & B |
Channel
A Frequency |
0.005
Hz to 1 MHz |
Rolloff
Filter |
(-2.1
V to -1.25 V) |
Channel
B Frequency |
0.005
Hz to 250 kHz |
Debounce
Time |
Selectable,
none or 1600 Hz
Selectable 0, 3, 50 ms |
Click
to Order Laureate™
Dual-Channel Up/Down Totalizer
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Typical
Applications |
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Up/Down
Totalizing |
Combining
Two Totals |
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Up/down
totalizing is provided by a mode of the Extended
counter where pulses are either added or
subtracted on Channel A based on a direction input
on Channel B. The counter can also be programmed
so that counting by Channel A is inhibited by an
input on Channel B. |
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A+B,
A-B and A/B arithmetic functions are available with
the Extended counter. A+B sums both totals, while
A-B subtracts the outflow total from inflow total.
The A/B ratio applied to total helps assure the
proper mixing of components. |
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Up
or Down Counting with Preset |
Machine
ON Time and Utilization |
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A
single Laureate dual-channel counter will handle
two repetitive fill operations by counting from
zero up to a preset, or down from a preset to zero.
A dual setpoint relay board is required |
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An
easy way to measure the ON time of machines is to
count AC line cycles and scale the total to hours.
To display machine utilization or duty cycle in
percent, use the Extended counter. Connect Channel
A to switched AC and Channel B to the AC line, and
have the counter display the A/B ratio with a 100
multiplier |
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Total and
Rate Simultaneously |
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The
Extended version of the Laureate dual channel counter can
display scaled rate or total for the same channel at the
push of a button, and alarm both the rate and total. The
Extended version is further capable of linearizing
nonlinear inputs, thereby extending the working range and
accuracy of flow transducers. |
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System-level
Capabilities |
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The
Laureate dual channel totalizer can independently
scale, display and alarm two totals, and the totals
plus alarm data can be transmitted via RS-232 or
RS-485. The displayed totals can also be transmitted
as isolated parallel BCD and isolated 4-20 mA analog
output. The Extended version can further display
and transmit arithmetic combinations of the two
totals. |
Click
to Order Laureate™
Dual-Channel Up/Down Totalizer
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FLW,
Inc - 3505
Cadillac Ave - Bldg E - Costa Mesa, CA. - 92626 - USA - Ph (714) 751 -
7512 - Fax (714) 751 - 0213
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