Using the Scaling Function
This section describes how to use the scaling function to convert voltage values measured by the instrument into the measurement target’s physical properties (current, temperature, etc.) and then display or record them.
Converted values can be displayed using decimal or scientific notation.
Example: With slope = 50 and unit = A:
Scaling settings during integration measurement
You can use the scaling function to convert the integrated pulse count to the measurement target’s physical properties (watt hours, volt-amperes, etc.) and then display or record the result.
The pulse output device will have predetermined physical quantity that corresponds to 1 pulse or a number of pulses that corresponds to a value of one in the basic units (for example, 1 kWh, 1 L, 1 m3).
Configuring the scaling of the U8556/LR8536 Current Module
You can use the scaling function to convert measured current values to 1-phase 2-wire power values.
Let V denote the voltage, λ the power factor, I the current, the power can be expressed by W = V × λ × I
Configuring the scaling of the U8554/LR8534 Strain Unit
Strain gage-type converter
You can use values on the Strain gage-type converter’s inspection record to convert the converter’s output into physical quantities.
Two methods are available: using a calibration factor*1 and using rated capacity and rated output. If all these values are listed, either method can be used.
When an inspection record provides a calibration factor
Example setting
To display waveform data measured using a strain gauge converter having a calibration factor of 0.001442 G /1 × 10-6 strain*2 as figures in gravities (G)
|
Decimal |
---|---|
Conversion method |
Ratio |
|
G |
|
0.001442 (Indicated as 1.442 m) |
|
0 |
- *1
Some inspection reports may provide a calibration factor in two representations: the one in per one microvolt per volt (/1 μV/V) and the other in per 1 multiplied by 10 to the -6th power strain (/1×10-6 strain).
In such a case, enter the quantity expressed in per 1 multiplied by 10 to the .6th power strain (/1×10-6 strain).
- *2
10-6 strain = με
When an inspection record provides rated capacity and rated output
(When the scaling conversion method is set to [Rating])
Strain gage
To convert values measured using strain gages into strain, determine the scaling conversion ratio using the following corrections:
-
Output correction based on strain gage configuration
-
Correction based on Young’s modulus and Poisson’s ratio of an object under measurement
Also, make the following corrections as required:
-
Wire-resistance correction
-
Gage-ratio correction
“11.2 Measuring Strain” in the Instruction Manual.