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Specially designed QWA-5 clock tester
Specially designed QWA-5 clock tester
Product details
Specially designed QWA-5 clock tester
Shenzhen Weixin Instrument and Meter Company has specially designed and improved a special version of the clock tester to meet the high sensitivity requirements for clock accuracy in certain application fields. This product is different from the commonly used QWA-5 model in the market. Through special technical improvements, it has increased the accuracy level by several equivalent levels, allowing you to reduce clock errors to within the smallest possible unit.
QWA-5 is a precision measuring instrument widely used in the quartz clock industry, mainly for measuring the accuracy of quartz crystal frequency used in clocks, as well as measuring various types of quartz clocks, motherboards, etc, PDA,DSC, Laptop time accuracy instrument QWA-5 can measure the daily and monthly errors of clocks, as well as the errors of clocks and crystals displayed in PPM. The probe type attached to the machine is suitable for testing various finished and semi-finished products QWA-5 has high reliability and stability, suitable for various production environments, and can maintain stability within 0.5PPM under a wide range of ambient temperatures
◆Time accuracy measurement
S/D Daily Fast（+）Or slowly（-）Several seconds S/M Fast every month（+）Or slowly（-）Several seconds
PPM Relative to standard frequency 32768Hz A margin of error of a few millionths.
These three methods can be converted according to individual needs
The internal time base of this clock crystal isTCXO10MHz, * * degree better than0.5PPMAdd selectionOCXO, with better accuracy than0.05ppm
Shenzhen Weixin Instrument and Meter Company has specially designed and improved a special version of the clock tester to meet the high sensitivity requirements for clock accuracy in certain application fields. This product is different from the commonly used QWA-5 model in the market. Through special technical improvements, it has increased the accuracy level by several equivalent levels, allowing you to reduce clock errors to within the smallest possible unit.
QWA-5 is a precision measuring instrument widely used in the quartz clock industry, mainly for measuring the accuracy of quartz crystal frequency used in clocks, as well as measuring various types of quartz clocks, motherboards, etc, PDA,DSC, Laptop time accuracy instrument QWA-5 can measure the daily and monthly errors of clocks, as well as the errors of clocks and crystals displayed in PPM. The probe type attached to the machine is suitable for testing various finished and semi-finished products QWA-5 has high reliability and stability, suitable for various production environments, and can maintain stability within 0.5PPM under a wide range of ambient temperatures
◆Time accuracy measurement
S/D Daily Fast（+）Or slowly（-）Several seconds S/M Fast every month（+）Or slowly（-）Several seconds
PPM Relative to standard frequency 32768Hz A margin of error of a few millionths.
These three methods can be converted according to individual needs
The internal time base of this clock crystal isTCXO10MHz, * * degree better than0.5PPMAdd selectionOCXO, with better accuracy than0.05ppm
◆Quartz crystal accuracy measurement
This test can determine the quartz crystal（32,768Hz）The testing procedure for quality and * * performance is as follows:
1、 Attach it to the machineANALOG/DIGITAL Switch placedDIGITAL.
2、Insert the quartz crystal into the socket attached to the machine.
3、 Check if the signal indicator light is on. If it is on, the quartz crystal is good. If it is not on or on and off, it indicates that the quartz crystal is bad.
4、 As the quartz crystal moves, pressSPEEDKey, select toFAST(Quick measurement),FASTThe light is on.
5、 pressPPMKey (i.e. unit selection)PPM）And read the value displayed.
◆Pointer clock testing
A pointer clock refers to a clock with a second hand that moves once per second The testing procedure is as follows:
1On boardANALOG/DIGITALSwitch placedANALOG
2Place the test meter in the sensing area of the attached machine (but do not touch any protrusions on the sensing surface), and move the test meter slightly until the pointer on the signal meter stabilizes and swings back and forth once per second.
3, PressSPEEDAt this time, the display screen will show numbers (if not displayed, it means it is a quick test),FASTThe light will turn on, please press it again at this timeSPEEDThe key will change to slow test, and the display screen will show a number. If the number is displayed, it will be10 5At this time, the testing speed is10In seconds, Number“5”Expressed in seconds“S”（SECOND）, rather than“5”Continue with the next step.
4,Read the measurement value from the display screen, “+”The table is approaching, “-”The table is slow.
◆Digital quartz clock testing
The so-called digital quartz watch refers to clocks (including electronic watches) without a second hand. The testing procedure is as follows:
1、 Attach it to the machineANALOG/DIGITALSwitch placedDIGITAL
2、 Place the test meter in the sensing area of the attached machine and press the bottom shell of the meter against the protrusion of the sensor.
3、 Test speed can be selectedFASTAlternatively, you can also choose10In seconds.
4、 pressS/M，S/D，PPMChoose the appropriate measurement unit .
5、 Read the measurement value from the display screen, “+”The table is approaching, “-”The table is slow.
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