Static Strain Meter PSD-704

Specifications

How to choose Strain measuring instrument

Points to check when selecting, with the values for this product (PSD-704).

1. 1. Choose by static or dynamic, based on frequency bandwidth

   Check that the frequency response range is sufficient for the speed of change of the phenomenon to be measured. For mainly static loads or temperature changes, a static strain measuring instrument is suitable; for vibration or shock, a dynamic strain measuring instrument is suitable. Some DC amplifier types handle high frequencies such as DC to 200 kHz, while carrier amplifier types are resistant to noise but have a comparatively narrower bandwidth.

2. 2. Confirm compatibility with the gauge resistance

   Strain gauges are commonly 120 Ω or 350 Ω, so check that the resistance is within the connectable range of the instrument. Outside that range the bridge cannot be balanced and measurement is not possible. Also check whether the gauge factor setting range allows entering the value of the gauge used.

3. 3. Estimate accuracy from measuring range and non-linearity

   Confirm that the maximum expected strain falls within the measuring range, then estimate the error from non-linearity (0.01 to 0.1 %F.S. for the listed products). Since %F.S. is based on full scale, measuring small strains over a wide range increases the relative error.

4. 4. Balance bridge voltage against heat generation and sensitivity

   A higher bridge voltage increases output and improves the S/N ratio, but it also increases drift caused by self-heating of the gauge. Check whether a voltage suitable for the thermal conductivity of the bonded material, the gauge dimensions, and the recommended excitation voltage of the transducer can be selected.

5. 5. Confirm the required number of simultaneous measurement points

   When acquiring stress distribution at multiple points simultaneously, insufficient channels prevent obtaining time-aligned data. Check whether the system can be expanded with add-on units, and whether each channel has an independent amplifier.

6. 6. Long cables and ease of use in the field

   Long cables reduce sensitivity due to resistance, so check whether there is a lead wire length correction function. Also select according to the recording system and site conditions: wire break check, portable or benchtop type, output format, communication such as RS-232C, and power supply type.

This guide was written by AI based on the listed products' documents and specification items.

About Strain measuring instrument and all products

Description

Also capable of checking input/output resistance and insulation of transducers. RS-232C interface is provided as standard.

FAQ

Q. What applications can the PSD-704 be used for?

A. It can be used for inspecting strain gauge transducers. It is a portable static strain meter that allows easy verification of transducer output in mV/V units.

Q. What items of a transducer can be checked with the PSD-704?

A. In addition to verifying transducer output of strain gauge transducers in mV/V units, it can also check input/output resistance and insulation of transducers.

Q. What communication interface does the PSD-704 have?

A. RS-232C is provided as standard.

Q. What type of meter is the PSD-704?

A. It is a portable static strain meter.

Written by AI based on the content of the source documents.

Source documents

• Catalog 製品ガイダンス 計測・計装用各種センサー・機器類 24 pages
  Found on: https://azuma-eg.com/catalogue/