Laureate™ 6-Digit Process Meter
& Flow Totalizer

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
• Update rate selectable to 25/sec
• Peak or valley display
• Green or red display
• Universal AC power, 85-264 Vac
• Isolated 5, 10 or 24 Vdc excitation supply to power sensors.
• NEMA 4X, 1/8 DIN case
• 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

Options

• Low voltage power: 10-48 Vdc or 12-32 Vac
• 2 or 4 output relays, electromechanical or solid state
• 1 or 2 analog outputs: Isolated, 4-20 mA, 0-20 mA, 0-10V, -10 to +10V
• Serial communications: RS232, RS485, Modbus RS485, USB, USB-to-RS485 converter

Standard Counter Version

• Six-digit display of rate or total at the push of a front panel key.  A Laureate with the Standard counter main board and a VF voltage-to-frequency signal conditioner board can be scaled to display rate or totalized 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. For example, the display can be scaled to show flow rate in gallons/minute or liters/sec, or to show volume in gallons or liters from the 0-10V output of a flow transducer. Or the display can be scaled to display power consumption in kilowatts or total utilized energy in kilowatt-hours based on the 0-1 mA output of a watt transducer.
    
• Square root extraction is selectable) and can be applied to rate or total. This makes the VF Laureate ideal for use with differential pressure flow meters, which have a squared output. Totalized volume is based on linearized rate.
    
• Accuracy is one of the highest for any digital panel meter: ±0.005% of span ±1 count.

• Batch control based on linearized total.  A Laureate VF meter with the Extended counter main board can totalize linearized flow from an analog rate signal, and 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 boards for communications and control include single or dual analog output boards, dual or quad relay boards, and serial communications boards. Laureates may be powered from 85-264 Vac or optionally from 12-32 Vac or 10-48 Vdc. The display is available with red or green LEDs. The 1/8 DIN case meets NEMA 4X (IP65) specifications from the front when panel mounted. Any setup functions and front panel keys can be locked out for simplified usage and security.

Display

Readout
Color
Range
Indicators

6 digits, 7-segment, 14.2 mm (.56")
Red or green LED
-999999 to +999999
Four LED lamps

Inputs

Standard signal levels
Other signal levels

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

Conversion

Frequency Technique
Update Rate
Gate Time

Inverse period
Gate time + 30 ms (max)
Selectable 10 ms to 199.99 s

Accuracy

Span Tempco
Zero Tempco
Accuracy at 25°C

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

Power

Voltage, standard
Voltage, optional
Frequency
Power Isolation

85-264 Vac or 90-300 Vdc (DC operation not UL approved)
12-32 Vac or 10-48 Vdc
DC or 47-63 Hz
250V rms working, 2.3 kV rms per 1 min test

Excitation Output (standard)

5 Vdc
10 Vdc
24 Vdc
Output Isolation

5 Vdc ±5%, 100 mA
10 Vdc ±5%, 120 mA
24 Vdc ±5%, 50 mA
50 Vdc to meter ground

Analog Output (optional)

Output Levels
 
Current compliance
Voltage compliance
Scaling
Resolution
Isolation

4-20 mA, 0-20 mA, 0-10V, -10 to +10V (single-output option)
4-20 mA, 0-20 mA, 0-10V (dual-output option)
2 mA at 10V ( > 5 kOhm load)
12V at 20 mA ( < 600 Ohm load)
Zero and full scale adjustable from -99999 to +99999
16 bits (0.0015% of full scale)
250V rms working, 2.3 kV rms per 1 min test
(dual analog outputs share the same ground)

Relay Outputs (optional)

Relay Types
 
Current Ratings
 
Output common
Isolation

2 Form C contact relays or 4 Form A contact relays (NO)
2 or 4 Form A, AC/DC solid state relays (NO)
8A at 250 Vac or 24 Vdc for contact relays
130 mA at 140 Vac or 180 Vdc for solid state relays
Isolated commons for dual relays or each pair of quad relays
250V rms working, 2.3 kV rms per 1 min test

Serial Data I/O (optional)

Board Selections
Protocols
Data Rates
Digital Addresses
Isolation

RS232, RS485, Modbus RS485, USB, USB-to-RS485 converter
Modbus RTU, Modbus ASCII, simpler Laurel ASCII
300 to 19200 bps
247 (Modbus), 31 (Laurel ASCII),
250V rms working, 2.3 kV rms per 1 min test

Environmental

Operating Temp.
Storage Temp.
Relative Humidity
Protection

0°C to 60°C
-40°C to 85°C
95% at 40°C, non-condensing
NEMA-4X (IP-65) when panel mounted

Electrical Connections

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