A, the classification of tension meter
There are two kinds of tension meter, Newton tension meter and mm tension meter, Newton tension meter and electronic and mechanical.Are used to measure tension on screen and a dedicated network frame screen tension apparatus.
For screen printing, tension meter is used to measure and control screen in the tension on the degree of tension and glue network frame screen tension after the size of the instrument.Newton tension meter measuring unit is N/cm, mm tension meter measuring unit is mm/cm.
Two kinds of tension meter can't use the formula for conversion of data and different brands of Newton tension meter reading also has bigger difference.
Newton of tension and that the tension meter reading is proportional to the, that means the larger the stretch mesh tension, reading.The mm of stretch mesh tension and that the tension meter reading is inversely proportional, that means the larger the stretch mesh tension, the smaller the readings.
Second, the tension meter measuring definition
1, import Newton tension meter.1 n tension is keep 1 kg object in acceleration of 1 m/s ^ 2.
2, domestic Newton tension meter.Based on intensity and pressure for the unit, that is, 1 kg = 9.8067 N amount in the unit of measurement.
3, mm tension meter.Was based on the quality of 1 kg under certain conditions, namely after the pull force of the equivalent uniformly around the screen by the subsidence of the resistance of the mm per cm.
Tension meter is due to domestic mm dial indicator as a header, so to counterclockwise while reading.Unavailable, early reading is not very convenient, so people like to use Newton tension meter.
At present, there are two ways to get the import Newton tension meter, a mechanical, another for electronic.Mechanical is the most economical, it's cheap and without energy, has been used in great quantities, and it can be applied almost screen before the production network and tense prepress measuring the tension of the most demanding conditions.
The main difference is that: the mechanical tension meter by the frequent use of fatigue, should be alignment anew;Whereas electronic rely on a pressure sensor, LCD display the signal through a wire to the host, not frequently correction.Electronic tension meter by the battery power supply, high precision and the minimum reading of 0.1 N/cm, actually the Internet version of the tension does not need so high accuracy.
Mechanical tension meter, there is a massive base on the guy a good online, a metal probe out from the bottom of the base, with two suspension spring inside achieve the balance of power.And metal probe is fixed on a metal rod, metal rod with a precision gear meshing, pull the dial indicator needle show accurate readings, the tension of the reading and screen size is equal.

Three, Newton tension meter compared with mm tension meter
Newton tension meter easy to use, easy to read, is the approximate number of measurement, and different brands of tension meter readings are not unified, differences and even up to a number of Newton, so foreign processing network edition, must be specified on the processing contract used by Newton tension of the brand and the brand of tension meter, lest produce needless trouble.
Mm tension meter is convenient to use, but reading is convenient, accurate measurement, reading is unified.Tension meter belongs to the internal quality control instruments, in order to use, the reading is convenient, so Newton tension meter application more widely.
Fourth, the use of mechanical tension meter and measuring method
1, determine the minimum distance from net frame when to 10 cm
2 contact stick, instrument must be placed in parallel to the direction of the mesh.
3, measuring, screen tension must be on the screen to be tested with finger tapping twice, then the pointer from side to side, stay fixed in indicating pointer value, this value is the screen tension values.
, must use no more than 4 screen manufacturers advice provided by the tension data value to design the network version of tension.
5, the surface of the tension meter toward is toward the mesh tension meter.The warp tension measurement, for example, the header towards the warp, vice for weft tension.
6, mechanical tension meter at the bottom of the instrument on both sides of the middle of the last contact type, can be divided into contact with two point contact and sticks.Generally stick contact is better than that of point contact, because it to the distinction between wire mesh fabric measurement is more obvious.
7, mesh version of the determination, large and medium-sized screen using 5 point measurement, long screen using 3 points, or 2 point measurement, small screen using the central measurement.
Five, the mechanical tension meter check and correction
Mechanical tension meter is purely mechanical instrument, do not need batteries and other energy, it can accurately and reliably detect screen at any time the tension of warp/weft direction.
Before first use the tension meter, the first thing to check whether the display pointer accurately indicator on the dial calibration point.To avoid error, tension meter should be checked regularly, in a timely manner as needed.Correction methods are as follows:
1, wipe the measuring gauge (each tension meter are equipped with a piece of glass measurement gauge) on any of the dust.
2, put the instrument on the measuring gauge glass, then refers to the dial pointer within the dashboard calibration standard (that is, the 0 bit or 0 bit symbols "1" below).
3, at this time if the pointer is error, the fixed screw loosen dial, calibration of rotary table, make the pointer and calibration standard "!"For, then tighten the set screw.
4, good tension meter correction on correction glass, mobile and repeat the test several times, check the instrument, the reproducibility (if reproducibility is not good, should be cleaning instrument).
5, clean instruments should please understand instrument instrument maintenance, professional should recalibrate after cleaning.Don't unpick and wash, so as not to damage the instrument.