The total range (in percentage) of full scale capacity over which a digital weight indicator “Automatic Zero Maintenance” (AZM) and “Push-button Auto Zero” (PAZ) functions will operate; Handbook 44.
Acceptable to the authority having jurisdiction over the area for in which a system or equipment will be used.
Pronounced “askee”. A seven-bit plus parity code established by the American National Standards Institute (ANSI) to achieve compatibility between data services.
Apparatus in which the circuits are not necessarily intrinsically safe themselves, but may affect the energy in the intrinsically safe circuits and are relied upon to maintain intrinsic safety.
Where public safety is primary, the “Authority Having Jurisdiction” may be a federal, state, local or other regional institution, department or individual. Some examples are a fire chief, fire marshal, chief of a fire protection bureau, labor.
An electronic means of providing “true zero” at all times on a digital scale. AZM compensates for such conditions as indicator or load cell drift or debris on a scale platform by electronically tracking out minor variations around zero.
National Conference on Weights and Measures body of officials that sets NTEP policy and has final say in disputes.
The amount of weight the scale is capable of weighing accurately.
The ability of an instrument to deliver the same weight reading for a given object on the corners of the weighing pan.
The smallest increment of weight displayed.
A current-based method of serial communications between digital devices; a logic high is represented by current flowing in the loop; a logic “low” is represented by a lack of current flowing in the loop.
Value of the smallest increment indicated (displayed) by a scale.
A dampening device used to reduce scale oscillations.
The fixed force of the weigh bridge, platform, and other load-supporting structures of the scale, the value of which is to be permanently balanced or cancelled out in the weight or measuring system.
The change in length along the Primary Axis of the load cell between no-load and Rated Load conditions.
System of signal representation employing discrete rather than continuously variable (analog) values.
Determines if the count by will be 1, 2, or 5.
Determines the amount of increments a scale offers.
A built-in scale having a self-contained under structure.
A method of printing in which a rectangular array (matrix) of spaces are filled in to form alphanumeric and punctuation characters.
In filling operations, the weight value over which material is slowly handled to provide a more accurate cutoff.
A temporary loss of electrical power normally caused by utility and maintenance switching functions where break-before-make switching strategies are used.
An integrated circuit contained within a standard housing characterized by its low profile, rectangular body, and symmetrical placement of leads along two opposing sides the device.
Any load applied parallel to, but not concentric with, the Primary Axis.
Extraneous undesirable currents or voltages that interfere with desirable electrical quantities. Some causes are distant lightning, radio transmitters, welding equipment, electrical switching equipment, poor brush contact on motors, and other electronic devices utilizing switching power supplies.
A negatively charged subatomic particle that orbits the nucleus of an atom. Electrical current is the flow of electrons.
An electric charge on the surface of an insulated object.
Method of matching load cell outputs in a multicell system by adjusting the excitation voltage to each individual load cell. Adjustment is made by changing the setting of a variable resistor in series with the excitation input.
A pivot point for a lever.
Data transmission in both directions, but not simultaneously. See “full duplex” on page 5.
A filter passing frequency components above a designated frequency and rejecting components below that frequency.
Obtaining different readings for the same object.
Measurement rate, in samples per second, that the A/D converter updates. Lower values are more immune to noise.
The time required to ensure that any further change in the parameter being measured is tolerable.