Laureate™ Dual-Channel Totalizer
With Two Independently Scalable Channels & Presets
  

  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 display
• NEMA 4X, 1/8 DIN case
• Dual relay option
• Analog output option
• Serial communication options
• Low voltage AC & DC power
• Certified to UL 61010C-1 (UL mark), EN 61010-1 (CE mark), and RoHS.

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, AxB, A/B, A/B-1 (draw).

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 8A relays or AC/DC solid state relays.

Extended Counter Capabilities

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 flow meter, 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.

• Custom curve linearization. Exceptionally accurate custom curve linearization is achievable, for example to linearize the low end of turbine flow meters. For setup, up to 180 data points can be input into a spreadsheet or text file by the user. The computer then calculates spline fit 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, AxB, 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

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. Jumper selections provide optimum operation for different sensor types and noise conditions.

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.

Other Features and Options

Plug-in isolated analog output, dual setpoint controller, and RS232/485 serial data I/O boards can upgrade the Laureate totalizer from a stand-alone monitor to system interface and control. The ability of the Laureate totalizer to output an isolated 4-20 mA signal which tracks a total may be unique among totalizers. The 1/8 DIN case of Laureate meters and counters meets NEMA 4X (IP-65) standards from the front for high pressure wash-down when panel mounted.

AC, pulses from NPN, PNP transistors, contact closures, magnetic pickups
Common ground for channels A & B
0 Hz to 1 MHz
0 Hz to 250 kHz
Nine ranges from (-12 to +12 mV) to (+1.25 to +2.1V).
250 Vac.
1 MHz, 30 kHz, 250 Hz (selectable)
0, 3, 50 ms (selectable)

Up/Down Totalizing

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.

Combining Two Totals

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.

Up or Down Counting with Preset

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.

Machine ON Time and Utilization

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.

Total and Rate Simultaneously

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 can also do curve linearization, thereby extending the working range and accuracy of flow transducers.

System-level Capabilities

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 an isolated 4-20 mA or 0-10V analog output. The Extended version can further display and transmit arithmetic combinations of the two totals.