measuring instruments.ppt
DESCRIPTION
fibre testing intrumentsTRANSCRIPT
It accurately measure the winding density of textile bobbins, beams, spools,
spindles, cones, quills, dye packages, rolls, etc.
Yarn Package Hardness Tester
Constant-pressure indicating system assures uniform test pressure
eliminating false readings due to differences between operators
Operation is as easy as pressing the spring-loaded knurled aluminum shell
down to the red line.
Textile Durometer Test Block The TB allows users to test the function of their textile
durometer and ensure it is operating properly.
Yarn Tension Meter
• Yarn Tension Meter is very useful to evaluate the tension of moving yarns especially in knitting & weaving machines in textile mills.
• Yarn Tension Meter has been designed specifically to fulfill the needs of fast growing textile industry. It is completely made of fibre to give lightweight & robust structure.
• Specially designed two outer pullies to support the moving yarn & the central pulley to press
the yarn while red knob or trigger is relished, the specially designed analog dial gives the tension directly in gms.
SALIENT FEATURES
• Specially designed equipment to determine tension of moving yarn in knitting & weaving machines.
• Latest model with sophisticated design.• Available in different capacities (2-25g,sensitivity 1g/5-
50g, sensitivity 2g/10-100g, sensitivity 5g).• Portable & handy can be carried anywhere.• Smooth precision-engineered mechanism.• Simple mechanism & easy operation.• Duly packed in wooden box for safety & easy transport
• TECHNICAL DETAILS• Range of measurement : 2-25g, sensitivity 1g• 5-50g, sensitivity 2g• 10-100g, sensitivity 5g.• Diameter of dial gauge : 60 mm.• Zero position : Middle of lower and higher
scaling.• Overall Dimensions of the Instrument : 140 (L) x
120 (W) x 30 (H) mm• 5.5 (L) x 5 (W) x 1.1 (H) Inch• Overall Dimensions with the Case : 200 (L) x
170 (W) x 50 (H) mm• Net Weight of the Instrument : 327 gms. (0.7149
lbs)
In doing lighting efficiency work, you need to measure light
intensity. You also need to know how to express light intensity for selecting lamps and for laying
out the overall lighting configuration.
Lumens“Lumen” is the unit of total light output
from a light source.
If a lamp or fixture were surrounded by a transparent bubble, the total rate of light flow through the bubble is measured in lumens.
Lumens indicate a rate of energy flow. Thus, it is a power unit, like the watt or horsepower.
Typical indoor lamps have light outputs ranging from 50 to 10,000 lumens. You use lumens to ordermost types of lamps, to compare
lamp outputs, and to calculate lamp energy efficiencies (which are
expressed as lumens per watt).
Footcandles and Lux“Footcandles” and “lux” are units
that indicate the density of light that falls on a surface. This is what light
meters measure.
For example, average indoor lighting ranges from 100 to 1,000 lux, and average
outdoor sunlight is about 50,000 lux.
• The foot candle is an older unit based on English measurements. It is equal to one lumen per square foot.
• It is being replaced by lux, a metric unit equal to one lumen per square meter.
• One foot candle is 10.76 lux.
• Candlepower
“Candlepower” is a measure of lighting
concentration in a light beam.
It is used primarily with lamps that focus, such as spotlights . In lamps where candlepower is specified, the candlepower rating usually applies only to a small spot in the center of the beam.
The Hagner Digital Luxmeter EC1
• The Hagner Digital Luxmeter, model EC1, is a small, handy and extremely easy-to-use instrument for accurate measurement of illuminance over a range of 0.1-200,000 lux.
• With both automatic zeroing and on/off switch, the only controls needed are a four-position range selection switch and a hold button for retaining the display value.
Tachometer
• In its most familiar form, a tachometer measures the speed at which a mechanical device is rotating. A common example is the tachometer found on automobile dashboards. In this application, the tachometer measures the revolutions per minute (RPMs) of the engine drive shaft It is important to monitor engine RPMs, as running the engine at excessively high rates can drastically shorten engine life.
A tachometer used in this application can be built in multiple ways. It may be a small generator attached to the engine drive shaft, where the RPM measurement is
scaled to the electric current generated by the device.
Alternately, it may simply measure the rate at which the ignition
system sends sparks to the engine.
The traditional tachometer requires physical contact
between the instrument and the device being measured. In
applications where this is not feasible for technical or safety reasons, it may be possible to use a laser tachometer to take
measurements from a distance.
A laser tachometer works by pulsing a tight beam of light against the rotating element. The rotating element will have a reflective spot, and the tachometer measures the
rate at which the light beam is reflected back. A laser tachometer
can be a permanent part of the system, or it can be handheld for occasional spot measurements.
A tachometer can even find uses in medicine. By placing a small,
turbine-like device in an artery or vein, a doctor can use a
tachometer to infer the rate of blood flow from the speed at which the
turbine spins. This can be used to diagnose circulatory problems such as clogged arteries. This device is
known as a haematachometer