This is a low comsumption module dedicated to full bridge connection including strain gauge based transducer. The extension distance and number of connection are improved compared to conventional modules.
The TD-30L is a digital indicator suited to measurement in calibration of force calibration machine or testing machine, where especially high precision is required.
It features resolution of 0.01×10-6 strain, and very stable measurement can be performed by using the functions such as the change of bridge excitation and the moving average together.
Features
Excellent accuracy and stability
Resolution of 0.01×10-6 strain at the smallest
Parameters of eight transducers can be registered and switched to read
This is a low consumption module dedicated to quarter bridge 3-wire connection. The extension distance and number of connection are improved compared to conventional modules.
The bolt fastening is used in a wide range of fields in modern society and is an indispensable element. Through the measurement of axial force applied to the bolts of machine structures, automobiles, aircraft, highways, bridges, segment fasteners, and other structures, it is possible to check and control the state of fastening (checking for looseness, overtightening, and the specified fastening force). This is also utilized for the measurement of bolt strength and the bolt fastening designs. We accept gauge installation for measuring the axial force of bolts. We will machine a hole in your supplied bolts, install the strain gauges for bolts, and perform load calibration. The installation on the existing bolts enables axial force control.
Strain gauge installation service
Construction with any of embedded bolt gauges or surface-adhering gauges. We can also handle special-shaped bolts upon consultation. Usable in a wide range of temperatures from low to high temperatures.
Installation method
Embedding type
Surface bonding type
Sensor
Embedding strain gauge
Strain gauge
Operating temperature
-30 to +100°C
-40 to +150°C
-10 to +80°C
-40 to +150°C
-269 to +80°C
40 to +80°C
-40 to +300°C
Machining
Machining hole diameter
Ø0.8
Machining hole diameter
Ø1.6, Ø2.0
Surface processing
Applicable bolt
M3 or more
M6 or more
M3 or more
others
Available with temperature measurement function
Axial force measurement, bending measurement, torque measurement
Processing method
There are two methods in strain gauge installation service. One is embedding, and the other is bonding. Choose between them according to the conditions of use.
Embedding: BTM series
A hole of 1.6mm or 2mm in diameter is drilled in the center of the bolt. The strain gauge is inserted into the hole and embedded with an exclusive adhesive. This method has the advantage of avoiding the gauge being damage by a washer, etc. while fastening the bolt.
Bonding: F, QF, ZF, CF series
Two strain gauges are bonded on both sides of the bolt shaft in axially symmetric positions to cancel the influence of bending. It is required to slightly scrape off the surface of the bolt shaft where the strain gauges are bonded, for the purpose of avoiding strain gauges being damaged while fastening the bolt or by contact of a washer. Choose strain gauges according to the usage conditions including temperature.
Calibration service
In order to achieve accurate measurement, we offer calibration service in which the bolt is calibrated with specified load. Instruments and calibration machines used for the calibration service are periodically calibrated and inspected by public institutions complying with the national standards.
Application example
Monitoring of axial force of bolts in joint parts
Wind turbine generator facilities are aimed at enlargement in the scale. Management of axial force is indispensable for the bolts used in joint parts of the structures, both in assembling process and in actual working condition. It is possible to continuously monitor the axial force by installing bolt strain gauges in some of the bolts used in the joint part.
