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
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
Example 1: Scaling with Known Loads (On-Line Calibration).
When entering the input or reading values, disregard the position of the decimal point.
If ENBL Enabled Load Submenu was selected, instrument is ready for scaling with Known Loads method.
Press d
Press d
Press d
Press d
Press b & c
Press d
Press d
Press d
Press d
Press b & c
Apply a known load equal to approximately 0% of the transducer range.
17)Press d at the IN.RD prompt. Display shows IN!2 Input 1 Submenu.
18)Display shows the actual signal being received.
19)Display advances to RD!1 Reading 1 Submenu.
20)Display shows last stored Reading 1 value with 1st digit flashing.
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 RD!1 value = 0000.
22)Display shows IN!2 Input 2 Submenu.
Apply a known load equal to approximately 100% of the transducer range.
23)Display shows the actual signal being received.
24)Display advances to RD!2 Reading 2 Submenu.
25)Display shows last stored Reading 1 value with 1st digit flashing.
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 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.
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