Network Module
Strain Quarter Bridge Module NSW-011C

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.

• Specifications

  Type	NSW-011C
  Number of measurement point	1 point
  Measurement time	200 ms/points (including transfer time)
  Programmable item	Channel number (000 to 999)
  Measurement mode	Strain quarter bridge 3-wire method
  Applicable gauge resistance	Either 120 Ω or 350 Ω (to be specified when ordering)
  Measuring range	±30000 x 10-6 strain
  Dimensions	50(W) x 20(H) x 100(D) mm
  Weight	Approx. 250 g

Network Interface NIF-100

The NIF-100 is a driver interface used to drive each network module directly from a personal computer, without using a data logger.

• Specifications

  Type	NIF-100
  Number of connection	100 modules
  Function	Converts RS-232C interface into 2-wire Signal Supplies power source to network modules
  Dimensions	235(W) x 50(H) x 160(D) mm (except projecting parts)
  Weight	Approx. 1.2 kg
  Power source	When AC power source is supplied: AC85-250 V 50/60 Hz 90 VA max.

Gauge Eｍbedding/ Calibration Service for Bolts

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

 

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.

Network driver NDR-100

This is a driver interface to drive network modules from a TDS-series measuring instrument*. Can also be used in combination with a single ASW-50C/SSW-50C.
* With TDS-540, ASW/SSW unit installation is required.

• Specifications

  Type	NDR-100
  Number of connection	100 modules for one NDR-100 (1000 measurement points at the maximum)
  Applicable data logger	TDS-630, TDS-530, TDS-602, TDS-303, TDS-540-01/-03
  TML-NET connection	Terminal blocks
  Features	Converts 3-wire signal into 2-wire signal. Supplies power source to network modules
  Dimensions	160(W) x 60(H) x 120(D) mm (except projecting parts)
  Power source	When AC power source is supplied: AC85-250 V 50Hz/60 Hz 90 VA max.

Channel Unit FSW-10L (for TDS-150)

This is a 10-channel unit allowing multiple measurements designed for exclusive use with portable data logger TDS-150. Up to five units (50 channels) can be connected. Allows measurement by strain gauge, strain gauge-type transducer, DC voltage, thermocouple, and Pt-RTD.

• Specifications

  Type	FSW-10L
  Measuring object	Strain, DC voltage, Thermocouple, PtRTD
  Number of measuring channels	10 channels
  Power supply	Supplied from data logger

Channel Unit FSW-10 (for TDS-150)

This is a 10-channel unit designed for exclusive use with portable data logger TDS-150. Five numbers of this unit (50 channels) at the maximum can be connected to one TDS-150. Measurement of strain, DC voltage, thermocouple and Pt-RTD are possible. It also accepts measurement of 1-gauge 4-wire method using modular plug for connection.

• Specifications

  Type	FSW-10
  Measuring object	Strain, DC voltage, Thermocouple, PtRTD
  Number of measuring channels	10 channels
  Power supply	Supplied from data logger