Honeywell SC1000 Stud Sensor User Manual


 
page 14 008-0608-00
1.4 What is
Signature Calibration
?
1.4.1 Overview
A small integrated circuit is located either inside the transducer, in an in-line package
between the instrument and the transducer, or in the connector of a cable. All data
necessary to set up the transducer with the instrument are stored (even linearity data),
and setup is automatic when a new transducer is connected to the instrument.
The Strain-Gage Input channel of the SC Series is designed to operate with Signature
Calibration. It will automatically set itself up with transducers which contain the mem-
ory device, but can also be set up using a front-panel interactive procedure. The Sig-
nature Calibration module can also be programmed from the instrument’s front panel.
Signature Calibration is only available with unamplified strain-gage transducers.
1.4.2 Benefits
The benefits are:
The transducer’s Calibration Record is always located where it is needed most...
with the transducer.
The instrument is always set up correctly with the transducer.
Interchanging of transducers and instruments is a quick process.
A User Calibration Data area that can be altered by customers to fit their require-
ments.
A Factory Calibration Sheet Data area, unalterable by the customer, can be cop-
ied back into the User Calibration Data.
1.4.3 Information
Stored
The following information is stored inside transducers equipped with Signature Cali-
bration:
Full-scale mV/V: The full-scale millivolt-per-volt (mV/V) rating of the transducer
when its full load is applied; also called “calibration factor”.
Shunt-Cal mV/V: The millivolt-per-volt output of the transducer when the shunt
calibration resistor is placed across its (-)SIGNAL and (-)EXCITATION leads.
Shunt Resistance: The resistance value, in Ohms, that was used to obtain the
shunt-cal mV/V value above.
Full-Scale Value: The full scale value of the transducer, in engineering units.
Engineering Units: The engineering units that the transducer is calibrated in (i.e.
pounds, grams, pascals, inches of water, etc.).
Serial Number: The serial number of the transducer.
Excitation Voltage: The magnitude and type of signal used to excite the trans-
ducer.
Linearization Points (optional): These can be used by an instrument using Shunt
Calibration or Millivolt-per-Volt Calibration to correct any non-linearity in the trans-
ducer and thus improve the accuracy of the system. An additional “multiple-point
calibration” can be purchased with the transducer that allows linearity correction
information to be placed into its Signature Calibration module.