Hardy HI 2151/30WC Single-Scale Controller - Manual (Page 169)

Appendix B - Glossary ot Terms
GLOSSARY OF TERMS
Accuracy Closeness of a reading to the actual value of the quantity being measured.
ALARM - Indication of a tolerance deviation.
Analog Shield Can A metal enclosure placed over the analog section of the electronics to prevent
radio frequency interference.
Analog Transmitter An option card which outputs an analog representation of net, gross, total
weight or rate of change data.
Appurtenance Any added equipment other than the weigh vessel, platform scale or feeder.
Baud Rate Baud rates are used as a measure of how fast serial data is transmitted, (BIT/
SEC).
BCD Binary Coded Decimal - a type of positional value code in which each decimal
digit is binary coded into 4-bit "words".
Bi-Directional A capability used to transmit data in either direction at the same time, for
example: to or from the instrument.
Clear Key A key used to clear data or formats entered into a menu.
CTS Clear to send an RS-232C level signaling a readiness to accept data.
Dead Band A value used to prevent relay chatter once the setpoint is reached.
Dead Load Weight of hopper assembly or platform assembly sitting on top of load cells.
Decimal Point Position Menu item used to set the decimal point position for all display readouts.
Dip-Switch A switch installed in a circuit card with several individual switches built in.
Used to set different options in a system.
Display A device used to show information from the instrument.
Engineering Units Pounds or Kilograms
Electrostatic Discharge (ESD) Electrostatic Discharge is an electric charge (static electricity) which occurs
when an electrically charged object, such as a person, touches the HI 2151/
30WC. To avoid damage to personnel and to the unit, a grounded static con-
trol wrist strap should always be worn when opening and/or servicing the HI
2151/30WC.
Enter Key This key is used to accept user input into the memory.
EPROM Electrically programmable read-only memory.
Error A message that indicates an unacceptable input has been entered.
Even A parity configuration.
Excitation D.C. voltage supplied to the load cell for power.
Full-Scale Full scale input as defined by instrument and load cell parameters. Example:
3MV/V load cell @ 10 volts = 30mV full scale.
Graduation Size Minimum increment displayed by the instrument.