KYOWA is a general manufacturer of stress measurement equipment with core skills in strain gauges.

You must have a dedicated Strain Measuring Instrument
Since the sensor side forms a Wheat Stone Bridge,in theory, it is possible to measure strain as long as you have a power supply to apply the excitation voltage and a multi-meter to measure the change in voltage (potential difference). When considering factors such as the power supply’s stability and S/N ratio and the potential difference of output voltage, it becomes unrealistic. The dedicated Strain Measuring Instrument is designed with these factors in consideration, allowing for strain based accuracy adjustment for convenience.

Primarily,there are four types of measuring instruments which are

1. STRAIN AMPLIFIER which amplifies the signal of transducer and outputs the voltage.(DPM-700B series、CDV/CDA-700A、MCD-A etc.)

2.STATIC STRAIN MEASURING INSTRUMENTS such as data logger which is capable of measuring minor strain changes. (UCAM-60B/65B、UCAM-500A etc),

3. ACQUISITION INSTRUMENT FOR DYNAMIC STRAIN capable of recording fast strain measurement (PCD-300series、EDS-400A、EDX-2000A etc. )

4.INSTRUMENTATION CONDITIONERS indicates the physical quantity and has an output control. (WGA-650B、WGA-670B、WGA-800C etc. )

A slow phenomena and minorchanges are called Static Strain and fast changing phenomena is called DynamicStrain.

Following parts must be checked respectively

There are two types of instruments for measuring the dynamic behavior which are AC Power Bridge and DC Power Bridge.。Characteristics of each are as follows

AC type DC type a (DPM-711B)

（CDV-700A）

Bridge power exchanges(AC2Vrms, 0.5Vrms) direct current(DC10V, 4V, 2V, 1V)
Frequency range from DC ~ 2.5kHz DC ~ 500kHz

(At the input of 10με) 0.2V (BV = AC2Vrms)0.1V (BV = DC2V) sensitivity

46dBp-p ratio SN (approximately200 times)

(Low-pass filter = FLAT) 30dBp-p (about 33.3 times about)

(BV = DC2V, low-passfilter = FLAT)

Less susceptible to theeffects of noise does not receive external induction

R balance adjustment,unbalanced

(Automatic tracking at CST) C balance

Only R balance

Following strain / ℃ or less 1 × 10-6 ± strain / ℃ 0.1 × 10-6 ± effect of temperature stability

Stability: ± 0.05% orless affected by temperature sensitivity/ ℃ ± 0.01% or less / ℃

DC system with a signal conditioneris commonly used to apply a constant voltage to the bridge and when you extend the cableconnection, sensitivity is reduced by cableresistance. The sensitivity of the constantcurrent method, on the other hand, does not decrease because it uses constantcurrent, and according to the Ohm’s law (V=I・R), if the bridge resistant isconstant, then the excitation voltage applied to the transducer remainsconstant.

There are two methods used when measuring multiple channels, the Scanning Method and Simultaneous Sampling method. This method has been adopted by static strain measuring instrument to measure the slow-moving strain.Simultaneous sampling method is a method to simultaneously measure all the channels at the same time, eliminating the time lag between channels.This method has been adopted for the acquisition instrument form measuring the dynamic strain time series changes in the strain of a moment.

The calibration constant is the coefficient used to convert the strain value acquired by a strain gage transducer into physical quantity. In the measurement condition setting for both Static and Dynamic strain measurement instruments, you can input the calibration constant, allowing you to acquire data in physical quantity.

The conditioner instrumentation requires you to enter the Rated Capacity and the Rated Output in order to display in physical quantity. This setting is called Registered Calibration Sensitivity.

As basic measures there is single point ground. Single point grounding means to ground one of the series of the shielded part (Shield cable and metal housing), shielding it from external noise. Grounding 2 points from the same shielded series creates a potential difference causing the current to flow resulting in noise.

Please see other solutions here 。