Mechanical Registers, Printers, Presets and TVCs

Materials of Construction

Mechanical Registration - Specifications

REPEATABLILITY: 0.05% of reading over entire range and beyond.

LINEARITY: Capable of ±0.125% or better over a 5:1 range from maximum nominal meter capacity.

LINEARITY: Capable of ±0.22% or better over a 10:1 range from maximum nominal meter capacity.

LINEARITY: Capable of ±0.5% or better over a 40:1 range from maximum nominal meter capacity.

Design Features

NOTE: Accuracy obtainable when all variables remain constant. Reading/ measurements must be equal to a minimum of one minute of flow at selected rate(s). All accuracy statements based on metering Stoddard Solvent, approximate viscosity 1 CPS. On higher viscosity products, the average deviation in accuracy will be even less.

Move Forward with Electronic Solutions:
Check out electronic solutions from Liquid Controls to reduce maintenance costs, improve accuracy, reduce lost product due to shrinkage, improve delivery times and increase staff efficiency. From mobile computing solutions such as the DMS i1000 to electronic registration such as the LectroCount™ family including the LCR-II and new LCR 600.

Specifications

Positive Displacement Meter - Large Numeral Counter (Register)
A Large Numeral Counter records the amount of each delivery or batch and provides a five digit resettable totalizer and an eight digit non-resettable totalizer. Choice of registration includes 1/10 and whole U.S. Gallons, 1/10 and whole Imperial Gallons, Liters, Deciliters, Cubic Meters, Barrels, Pounds, etc.

Mechanical Registration - Counter Mounted Pulser
Pulsers supply an electrical signal to devices such as remote totalizers, batch controllers, rate-of-flow recorders, etc. Models include Dry Reed 1 PPR or 10 PPR and Solid State single channel 100ppr or solid state quadrature dual channel 50 ppr /channel.

Positive Displacement Meter - Large Numeral Counter with Ticket Printer (Pictured above)
A Printer provides an imprinted ticket record of the transaction. Further security is provided by before and after imprinting of consecutive sales numbers and printing of meter/product identifiers. Prints on standard zero-start, Neptune zero or accumulative style tickets. Magnetic lid with rubber seal keeps out dirt and weather. Right or optional left hand reset available.

Mechanical Registration - Preset Counter
Enables you to select and automatically control Preset Valve closure so that an exact predetermined volume will be delivered. Valve closure is controlled either in two stages, with a pre-shut-off dwell period to prevent hydraulic shock or in a single-stage for shut-off only. Normally single stage valve operation is preferred in low velocity systems and/or high viscosity applications.

Preset Counter includes red emergency stop button to abort preset deliveries. Preset Counter also available with switches to control pump starter circuit, security, security block valve or pilot-operated control valves. Switches are available conforming to applicable UL or CSA electrical codes.

Mechanical Registration - Microswitches
Preset Counter enables you to set a predeterminded volume and control a mechanically linked valve closure so that the exact predetermined volume will be delivered and the valve will close, shock free. Microswitches convert mechanical signal to electrical or pneumatic signal to provide Preset Counter control of remotely located valve, pump, alarms and related system equipment.

Mechanical Registration - Variable / Fixed Gravity TVC
A positive displacement meter measures gross volume regardless of temperature and/or specific gravity. On those products with linear coefficient of expansion, a Temperature Volume Compensator automatically corrects registration to indicate the volume of the liquid at a selected base temperature normally 60°F (15°C). Whether or not a Temperature Volume Compensator should be used in a meter assembly would be determinded by one or more of the following considerations:

The magnitude of the coefficient of expansion of a product.
The magnitude of variation in product temperature.
The commercial value of the product.
The degree of metering accuracy desired.
The requirement that the product be measured by weight instead of volume.

The Temperature Volume Compensator contains an infinitely variable transmission, which reacts to product and ambient temperature sensed by a fluid filled capillary system connected to a motor bellows. Changes in product temperature produce changes in the bellows length. This change in length is sensed and mechanically transmitted to a differential. The degree to which this variation in length affects the registration is based on the coefficient of expansion, which may be set in the field on a TVC/VG (variable gravity) model on a scale conveniently located on the front plate of the Temperature Volume Compensator.

Literature