California Code of Regulations
Title 4 - Business Regulations
Division 9 - Division of Measurement Standards, Department of Food and Agriculture
Chapter 1 - Tolerances and Specifications for Commercial Weighing and Measuring Devices
Article 2.3 - Carbon Dioxide Liquid-Measuring Devices
Section 4029.1 - S. Specifications

Universal Citation: 4 CA Code of Regs 4029.1

Current through Register 2024 Notice Reg. No. 38, September 20, 2024

S.1 Design of indicating and recording elements and of recorded representations.

S.1.1. Primary elements.

S.1.1.1. General. A device shall be equipped with a primary indicating element and may also be equipped with a primary recording element.

S.1.1.2. Units. A device shall indicate and record, if equipped to record, its deliveries in terms of pounds or kilograms; or decimal subdivisions or multiples thereof.

S.1.1.3. Value of Smallest Unit. The value of the smallest unit of indicated delivery, and recorded delivery, if the device is equipped to record, shall not exceed the equivalent of:

(a) for small delivery devices:

(1) one pound, or

(2) one kilogram.

(b) for large delivery devices:

(1) ten pounds, or

(2) ten kilograms.

S.1.1.4. Advancement of Indicating and Recording Elements. Primary indicating and recording elements shall be susceptible of advancement only by the normal operation of the device. However, a device may be cleared by advancing its elements to zero, but only if:

(a) the advancing movement, once started, cannot be stopped until zero is reached, or

(b) in the case of indicating elements only, such elements are automatically obscured until the elements reach the correct zero position.

S.1.1.5. Return to Zero. Primary indicating and recording elements shall be readily returnable to a definite zero indication. Means shall be provided to prevent the return of primary indicating elements and of primary recording elements beyond their correct zero position.

S.1.2. Graduations.

S.1.2.1. Length. Graduations shall be so varied in length that they may be conveniently read.

S.1.2.2. Width. In any series of graduations, the width of a graduation shall in no case be greater than the width of the clear interval between graduations. The width of main graduations shall be not more than 50 percent greater than the width of subordinate graduations. Graduations shall in no case be less than 0.008 inch in width.

S.1.2.3. Clear Interval Between Graduations. The clear interval shall be not less than 0.04 inch. If the graduations are not parallel, the measurement shall be made:

(a) along the line of relative movement between the graduations at the end of the indicator, or

(b) if the indicator is continuous, at the point of widest separation of the graduations.

(See also S.1.3.6.)

S.1.3. Indicators.

S.1.3.1. Symmetry. The index of an indicator shall be of the same shape as the graduations at least throughout that portion of its length associated with the graduations.

S.1.3.2. Length. The index of an indicator shall reach to the finest graduations with which it is used, unless the indicator and the graduations are in the same plane, in which case the distance between the end of the indicator and the ends of the graduations, measured along the line of the graduations, shall be not more than 0.04 inch.

S.1.3.3. Width. The width of the index of the indicator in relation to the series of graduations with which it is used shall be not greater than:

(a) the width of the widest graduation, and

(b) the width of the minimum clear interval between graduations.

When the index of an indicator extends along the entire length of a graduation, that portion of the index of the indicator that may be brought into coincidence with the graduation shall be of the same width throughout the length of the index that coincides with the graduation.

S.1.3.4. Clearance. The clearance between the index of an indicator and the graduations shall in no case be more than 0.06 inch.

S.1.3.5. Parallax. Parallax effects shall be reduced to the practicable minimum.

S.1.3.6. Travel of Indicator. If the most sensitive element of the primary indicating element utilizes an indicator and graduations, the relative movement of these parts corresponding to the smallest indicated value shall be no less than 0.20 inch.

S.1.4. Computing-Type Devices.

S.1.4.1. Printed Ticket. Any printed ticket issued by a device of the computing type on which there is printed the total computed price shall have printed clearly thereon also the total quantity of the delivery and the price per unit.

S.1.4.2. Money-Value Computations. Money-value computations shall be of the full-computing type in which the money value at a single unit price, or at each of a series of unit prices, shall be computed for every delivery within either the range of measurement of the device or the range of the computing elements, whichever is less.

The total price shall be computed on the basis of the quantity indicated when the value of the smallest division indicated is equal to or less than the value specified in S.1.1.3.

S.1.4.3. Money-Values, Mathematical Agreement. Any digital money-value indication and any recorded money value on a computing-type device shall be in mathematical agreement with its associated quantity indication or representation to within one cent of money value.

S.2. Design of Measuring Elements.

S.2.1. Vapor Elimination. A measuring system shall be equipped with an effective vapor eliminator or other effective means to prevent the measurement of vapor that will cause errors of the applicable tolerances.

S.2.2. Reverse Flow Measurement. Effective means, automatic in operation, shall be installed to prevent reverse flow measurement.

S.2.3. Maintenance of Liquid State. A device shall be so designed that the product being measured will remain in a liquid state during passage through the device.

S.2.4. Automatic Temperature or Density Compensation. A volumetric device shall be equipped with automatic means for adjusting the indication and registration of the measured quantity of the product to the quantity of the measurement in terms of pounds.

S.2.5. Provision for Sealing. Adequate provision shall be made for applying security seals in such a manner that no adjustment or interchange may be made of:

(a) any measurement element.

(b) any adjustable element for controlling delivery rate when such rate tends to affect the accuracy of deliveries, and

Any adjusting mechanism shall be readily accessible for purposes of affixing a security seal.

S.2.6. Mass Flow Meters. An automatic means to determine and correct for changes in product density shall be incorporated in any mass flow metering system that is affected by changes in the density of the product being measured.

S.3. Design of Discharge Lines and Discharge Line Valves.

S.3.1. Diversion of Measured Liquid. No means shall be provided by which any measured liquid can be diverted from the measuring chamber of the device or the discharge line therefrom, except that a manually controlled outlet that may be opened for purging or draining the measuring system shall be permitted. Effective means shall be provided to prevent the passage of liquid through any such outlet during normal operation of the device and to indicate clearly and unmistakably when the valve controls are so set as to permit passage of liquid through such outlet.

S.3.2. Discharge Hose. The discharge hose of a measuring system shall be of a wet hose type with a shutoff valve at its outlet end.

S.4. Marking Requirements.

S.4.1. Limitation of Use. If a measuring system is intended to measure accurately only liquids having particular properties, or to measure accurately only under specific installation or operating conditions, or to measure accurately only when used in conjunction with specific accessory equipment, these limitations shall be clearly and permanently marked on the device.

S.4.2. Discharge Rates. A meter shall be marked to show its designed maximum and minimum discharge rates. The marked minimum discharge rate shall not exceed 20 percent of the maximum discharge rate.

S.5. Level Condition. On-Board Weighing Systems. Provision shall be made for automatically inhibiting the delivery of liquid carbon dioxide when the vehicle is out of level beyond the limit required for the performance to be within the applicable tolerances.

1. New section filed 5-7-93; operative 6-7-93 (Register 93, No. 19).
2. Amendment deleting asterisks filed 11-1-94; operative 12-1-94 (Register 94, No. 44).

Note: Authority cited: Sections 12027 and 12107, Business and Professions Code. Reference: Section 12107, Business and Professions Code.

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