Laureate™ 6-Digit
Process Meter & Totalizer
 Ideal as a Flow Rate Meter & Totalizing Flow Indicator
Rate, analog square root, batch control, time based on rate
from 0-1 mA, 4-20 mA or 0-10 V signals.

   Standard Counter

• 6-digit display of rate or total, selectable via front panel key.
• 0-1 mA, 4-20 mA, 0-10V inputs, or special factory scaling.
• Exceptional accuracy: ±0.005% of span ±1 count
• Square root display from analog output of differential pressure flow transducers.
• Totalizing based on rate and time (integrating totalizer).
• Field scalable for direct readout in engineering units.
• Selectable "count by" of 10 or 100 with rounding.
• Isolated 5, 10, or 24 Vdc excitation output to power sensors.
• Update rate selectable to 25/sec.
• Peak value display.
• 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 Standard Counter, plus:

• Batch control based on rate and total.
• Display of process time based on rate.
• Custom curve linearization.

Standard Counter Version

• Rate display to 6 digits.  A Laureate with the Standard counter main board and a VF voltage-to-frequency signal conditioner board can display rate to six digits for 0-1 mA, 4-20 mA or 0-10V analog process signals. Special input ranges are available from the factory. Accuracy is one of the highest for any digital panel meter: ±0.005% of span ±1 count. The display can be scaled to engineering units, such as gallons/minute or liters/sec.
    
• Rate with square root extraction (selectable) is standard. This makes the VF Laureate ideas for use with differential pressure flow meters, which have a squared output.
    
• Linearized total.  The VF Laureate can also totalize 0-1 mA, 4-20 mA or 0-10V analog process signals. If square root extraction or custom linearization has been applied to rate, totalizing is applied to the linearized rate. Display of rate or total is selectable at the push of a front panel key. One application is to display totalized flow in gallons or liter. Another application is to display kilowatt-hours based on the 0-1 mA output of a watt transducer.

• Batch control based on linearized total.  A Laureate VF meter with the Extended counter main board cannot only totalize linearized flow from an analog rate signal, but also count up to a preset value, or count down to zero from a preset value for batch control. Operation as a batch controller requires the dual-relay output board option. One of the relays is dedicated to ON/OFF batch control. The other relay is available to slow down rate near the setpoint or to provide another alarm or control function based on rate or total.
    

• Custom Curve Linearization.  For custom curve linearization, 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 Extended VF meter can linearize and display analog inputs based on a custom curve, for instance to read out the volume of an irregularly shaped tank based on level or pressure, or to linearize a nonlinear transducer. Custom-linearized rates can also be totalized and be used for batch control.
    
• Time Based on Rate.  The Extended VF meter can display a time inversely proportional to measured rate, such as the time that it will take a conveyor to traverse an oven. As the rate of the conveyor is increased, the displayed baking time is decreased.

Principles of V-to-F Operation

The V-to-F signal conditioner board converts the full-scale 0-1 mA, 4-20 mA or 0-10 V analog signal to a frequency of 10 kHz to 110 kHz. This frequency is determined by measuring period over a selected gate time (from 10 ms to 200 s) and taking the inverse of period. Selecting a short gate time provides a much higher update rate than conventional counting-type frequency meters. At the lowest frequency of 10 kHz and the minimum gate time of 10 ms, the meter is capable of 25 updates per second. Scaling to rate in engineering units and totalizing are done mathematically. Totals are stored in nonvolatile memory in case of power loss.

High Resolution Display

The display of rate or total may be scaled to ±999,999. The two least-significant digits may be set to display zero with rounding or be active digits. Noise in rate readings can be reduced by selecting a longer gate time. In addition, an adaptive digital filter can reduce variations due to noise while rapidly responding to actual changes in signal level.

Hardware Features

Optional plug-in isolated analog output, dual setpoint controller,or RS232/485 serial data I/O boards can upgrade the Laureate VF Analog Input Flow Rate Meter & Totalizer from a stand-alone monitor to system interface and control. 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.

0-1 mA, 4-20 mA, 0-10V
Consult factory

±0.0025% FS/°C
±0.0005% FS/°C
±0.005% FS ±1 count

Flow from a Differential Pressure Transducer

Up- or Down-Counting Batch Controller

Volume of an Irregularly-Shaped Tank

Process Time from an Analog Rate Signal