As used in this chapter the following terms mean:
(a)
“Weighing instrument” means any device, contrivance, apparatus, or instrument used, or designed to be used, for ascertaining weight and includes any tool, appliance, or accessory used or connected therewith.
(b)
“Measuring instrument” means any device, contrivance, apparatus, or instrument used, or designed to be used, for ascertaining measure and includes any tool, appliance, or accessory used or connected therewith.
(c)
“Correct” means any weight or measure or weighing, measuring, or counting instrument which meet all of the tolerance and specification requirements established by the director pursuant to Section 12107.
(d)
“Incorrect” means any instrument which fails to meet all of the requirements of Section 12107.
(e)
“Commercial purposes” include the determination of the weight, measure, or count of any commodity or thing which is sold on the basis of weight, measure, or count; or the determination of the weight, measure, or count of any commodity or thing upon which determination a charge for service is based. Devices used in a determination upon which a charge for service is based include, but are not limited to, taximeters, odometers, timing devices, parcel scales, shipping scales, and scales used in the payment of agricultural workers.
“Commercial purposes” do not include the determination of the weight, measure, or count of any commodity or thing which is performed within a plant or business as a part of the manufacturing, processing, or preparing for market of that commodity or thing, or the determination of charges for the transmission of letters or parcels of less than 150 pounds, except when that determination is made in the presence of the customer charged for the service.