QWA-5ACLOCK TESTER

 

 

USER

 

MANUAL

 

                          

 

sHEN zhen WISDOM SOURCE Electronics Co Ltd  [ADRESS：Mingzhi Street, Baoan District, ShenZhen, China]

 

                                                     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:

1. ppm：part per million
2. s/d：seconds/day
3. s/m：seconds/month

Compared with the same type of products from other companies, our QWA-5A has the following advantages:

1. with a more sensitive sensor in it;
2. taking non-contact method;
3. with advanced CPU and TCXO(Temperature Compensated Crystal Oscillator);
4. with the function of alarming, and the user can set alarming range;
5. easy setting procedure;
6. accuracy is better than 0.3ppm;
7. 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