Omega CNiS32 User Manual
3.2.6 Input/Reading (Scale and Offset) Menu
Input voltage or current can be converted or scaled into values appropriate for
the process or signal being measured. So, a reading may be displayed, for
example, in units of weight or velocity instead of in amperes and volts.
The controller determines scale and offset values based on two user-provided
input values entered with the corresponding readings.
There are two methods to scale this meter to display readings in engineering units.
The first method is to scale with known loads. Do this by applying known loads
to a transducer connected to a meter, or by simulating the output of the
transducer with voltage or current simulator.
The second method is to scale without known inputs. Do this by calculating
input values based on transducer specifications and manually entering them
through the front panel push-buttons.
the process or signal being measured. So, a reading may be displayed, for
example, in units of weight or velocity instead of in amperes and volts.
The controller determines scale and offset values based on two user-provided
input values entered with the corresponding readings.
There are two methods to scale this meter to display readings in engineering units.
The first method is to scale with known loads. Do this by applying known loads
to a transducer connected to a meter, or by simulating the output of the
transducer with voltage or current simulator.
The second method is to scale without known inputs. Do this by calculating
input values based on transducer specifications and manually entering them
through the front panel push-buttons.
Example 1: Scaling with Known Loads (On-Line Calibration).
When entering the input or reading values, disregard the position of the
decimal point.
decimal point.
If
ENBL Enabled Load Submenu was selected, instrument is ready for
scaling with Known Loads method.
Apply a known load equal to approximately 0% of the
transducer range.
transducer range.
Press
d
17) Press
d at the IN.RD prompt. Display shows IN!2 Input 1
Submenu.
Press
d
18) Display shows the actual signal being received.
Press
d
19) Display advances to
RD!1 Reading 1 Submenu.
Press
d
20) Display shows last stored Reading 1 value with 1
st
digit flashing.
Press
b & c 21) Use b and c buttons to enter RD!1 value.
This value corresponds to Input 1 in terms of some meaningful
engineering units. To show Input 1 as zero percent enter
engineering units. To show Input 1 as zero percent enter
RD!1
value = 0000.
Press
d
22) Display shows
IN!2 Input 2 Submenu.
Apply a known load equal to approximately 100% of the
transducer range.
transducer range.
Press
d
23) Display shows the actual signal being received.
Press
d
24) Display advances to
RD!2 Reading 2 Submenu.
Press
d
25) Display shows last stored Reading 1 value with 1
st
digit flashing.
Press
b & c 26) Use b and c buttons to enter RD!2 value.
This value corresponds to Input 2 in terms of some meaningful
engineering units. To show Input 2 as 100% enter
engineering units. To show Input 2 as 100% enter
RD!2 value = 0100.
This scaling method based on 2 input values entered with 2 corresponding
reading. Up to 10 linearization points can be selected to customize the
transducer curve. To select linearization points see “L.PNt” Submenu.
reading. Up to 10 linearization points can be selected to customize the
transducer curve. To select linearization points see “L.PNt” Submenu.
22