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SC Series Instruction Manual page 69
Strain-Gage Input Channel10
10.5.5
CALIBRATION DATA
Sub-Menu
This enters the values that will be used by the instrument when it calibrates itself
to the transducer. The menu items that are displayed will change according to
what the
CALIBRATION TYPE
is set for.
EXCITATION
Menu Item
This sets the excitation voltage used to power up the transducer. The choice are:
•“
EXCITATION=5VDC
” means 5 volts DC excitation.
•“
EXCITATION=10VDC
” means 10 volts DC excitation.
This menu item may be automatically updated by a transducer’s Signature Mod-
ule.
FULL SCALE MV/V
Menu Item
The transducer output when its full-scale load is applied to it, in milliVolts-per-Volt.
This menu item is used by the instrument to set the gain of its amplifier circuit, and
(when the
CALIBRATION TYPE
is set to mV/V Calibration) to calibrate the instrument.
This value is normally found on the transducer’s Certificate of Calibration issued
by its manufacturer.
This menu item may be automatically updated by a transducer’s Signature Mod-
ule. It is available for all calibration types.
FULL SCALE VALUE
Menu Item
The transducer’s full-scale output in engineering units.
This menu item may be automatically updated by a transducer’s Signature Mod-
ule. It is available only with the Shunt Calibration and mV/V Calibration types.
ZERO SCALE VALUE
Menu Item
The transducer’s zero-scale output in engineering units, which is usually zero.
This menu item may be automatically updated by a transducer’s Signature Mod-
ule. It is available only with the Shunt Calibration and mV/V Calibration types.
SHUNT CAL VALUE
Menu Item
The shunt calibration value must be calculated by using information found on the
transducer’s Certificate of Calibration and the following formula:
The terms have the following meanings:
• Shunt-Calibration Output: The transducer’s output under shunt calibration
conditions in mV/V. Sometimes called “Shunt Cal. Factor”.
• Full-Scale Output: The transducer’s full-scale output in mV/V. Sometimes
called “Calibration Factor”.
• Full-Scale Capacity: The transducer’s desired full-scale reading in engineer-
ing units (PSI, lbs, Kg, etc.). You may wish to convert the engineering units of
this value. For example, if the transducer full scale is 3000PSIG and you wish
the channel to read in bar, you must convert 3000PSIG into 206.84 bar.
This menu item may be automatically updated by a transducer’s Signature Mod-
ule.
The shunt resistor’s ohmic value used to generate the Shunt-Calibration Output is
given on the transducer’s Certificate of Calibration. Normally, the instrument has
a shunt calibration resistor of 59000 (59K) ohms installed. If your transducer and
instrument were purchased at the same time from Sensotec, the correct shunt
resistor has been installed.
This menu item is only available with the Shunt Calibration type.
SHUNT CAL VALUE
Shunt-Calibration Output
Full-Scale Output
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Full-Scale Capacity×=