Honeywell SC500, Руководство пользователя

Страница: 62 / 150

page 62 008-0671-00
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.
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 Module. 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 Module . 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 Module . 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 condi-
tions 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 engineering
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 Module .
See “Wiring” on page 52 for information on how, according to the wiring and trans-
ducer type, the instrument applies shunt calibration conditions to the transducer.
This menu item is only available with the Shunt Calibration type.
To verify proper transducer operation, you can apply the shunt resistor to the trans-
ducer while the instrument is in the RUN mode. Press and hold the [ENTER] button
for three seconds; this will apply the shunt resistor and display the reading.
KNOWN POINT x/y
Menu Items
This enters the engineering units for the known-load calibration points. These points
must match the actual loads that you will apply to the instrument during calibration.
The number of calibrations points depends on the
CALIBRATION TYPE
.
When using the 2-Point Known Load Calibration type, the following menu items are
available:
• “
KNOWN POINT 1/2
”: point 1 of 2, usually 0% of the transducer’s full-scale capacity.
• “
KNOWN POINT 2/2”
: point 2 of 2, usually 100% of the transducer’s full-scale capacity.
SHUNT CAL VALUE
Shunt-Calibration Output
Full-Scale Output
------------------------------------------------------------- Full-Scale Capacity
×
=