QWA-5ACLOCK TESTER
USER
MANUAL
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sHEN zhen WISDOM SOURCE Electronics Co Ltd
[ADRESS：Mingzhi Street, Baoan District, ShenZhen, China]
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Email:szwisdomsource@163.com
1. Overview
The new QWA-5A clock tester is suitable for precisely testing all kinds of clock circuits with crystal oscillator working at 32.768KHz, for example: quartz clocks、electronic watt-hour meter、computer motherboard、temperature controller、timer、electronic weigher and electronic cash register with timer function. Its appearance is depicted as Figure.1.
Figure.1 QWA-5A clock tester
QWA-5A clock tester especially suits the fast testing of finished products or semi-finished products. Additionally, our QWA-5A clock tester has a tinny probe with it, which can suits the testing of bigger circuit boards.
QWA-5A has three stalls:
- ppm：part per million
- s/d：seconds/day
- s/m：seconds/month
Compared with the same type of products from other companies, our QWA-5A has the following advantages:
- with a more sensitive sensor in it;
- taking non-contact method;
- with advanced CPU and TCXO(Temperature Compensated Crystal Oscillator);
- with the function of alarming, and the user can set alarming range;
- easy setting procedure;
- accuracy is better than 0.3ppm;
- parameters that was set once won’t be lost when starting again
2. Features
① measuring objects: quartz clock and clock circuit board
② voltage: 180V-240V AC 50Hz 60Hz
③ testing frequency: 32.768KHz
④ reference frequency:16.384MHZ TCXO
- testing accuracy: better than 0.3ppm
⑥ range: ppm：part per million; s/d：seconds/day; s/m：seconds/month
⑦ signal strength indicator: level meter indicator
⑧ alarming setting range:±220ppm
⑨ volume: 23.5cm×10.5cm×30cm
⑩display mode: four-digital tube display
⑪processor: AVR quick type
