OVERVIEW

The new MD-4B  clock tester is suitable for precisely testing all kinds of clock circuits with crystal oscillator working at 32.768KHz and 1Hz, for example: electronic timer,electronic thermostat,telephone,electronic scale,telecontroller,electronic perpetual,quartz clocks. MD-4B  has three stalls:ppm(part per million, accurate to 0.1ppm),s/d(seconds/day, accurate to 0.01 seconds),s/m(seconds/month, accurate to 0.1 seconds).

MD-4B  clock tester especially suits the fast testing of finished products or semi-finished products. Additionally, our MD-4B  clock tester has a tinny probe with it, which can suits the testing of bigger circuit boards. Its appearance is depicted as Figure.1.

                                                                                                                          Figure.1  MD-4B clock tester

MD-4B  has three stalls:

1. ppm:part per million, accurate to 0.1ppm

2. s/d:seconds/day, accurate to 0.01 seconds

3. s/m:seconds/month, accurate to 0.1 seconds

Compared with the same type of products from other companies, our MD-4B has the following advantages:

1. with a more sensitive sensor in it to receive weak signal;

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. Accuracy is better than 0.4ppm.

FEATURE

1. measuring objects:quartz clock,electric meter and clock circuit board

2. voltage:220V AC  50Hz

3. testing frequency:32.768KHz        

4. reference frequency:16.384MHZ TCXO       

5. testing accuracy:better than 0.4ppm

6. range:ppm(part per million, accurate to 0.1ppm),s/d(seconds/day, accurate to 0.01 seconds),s/m(seconds/month, accurate to 0.1 seconds)

7. signal strength indicator:level table indicator

8. alarming setting range:±220ppm

9. volume:26cm×12cm×22cm

10. display mode:four bit digital tube display

11. processor:AVR fast type   

12. resolving power:0.1s/d

PANEL INTRODUCTION

MD-4B clock tester's front and back panel are showed by Figure.2 and Figure.3:

                                                                                                           Figure 2. MD-4B clock tester's panel(1)

1. power switch

2.Signal indicator

3.Fast/slow stall

4.Display area

5.PASS indicator

6.Failure indicator

7.S/M

8.  S/D

9.  ppm

10. sensor interface

                                                                                                    Figure 3. MD-4Bclock tester's panel(2)

11 . SPEED

Fast/slow measurement period selection, default one second period measurement when starting,FAST light often light on. turn the speed key to 5 seconds to refresh.

12. UL

The upper limit value is set, and the key is placed in the measurement state. Click the "UL" button to enter the alarm limit setting. After entering a certain value, press the key to save the upper limit value. (you can also keep the value of the upper and lower limits by the save key after the value of the input is finished, and then the lower limit can be avoided.)

13.  LL

The lower limit set the key. When we press the "LL" button in the measurement state, we enter the lower limit setting of the alarm value. After entering a certain value, press the key again to save the lower limit value.

14. ±

Positive and negative adjustment. It is not used when setting up.

15 .SAVE

A key to save the equal value of the upper and lower limits

FAQ

within 5-7 working days after receiving the payment. we provide just-in-time delivery.

Q2: Can you send engineer to help installing our machine?

  Yes, if need,we can send our engineer to go to your factory to help installing our  machine, train
 the workers and make sure the machine running well before he leave.

Q3: If the machine get damaged, what can i do ?

In the guarantee time (1 year) , we will send the spare parts to you . And provide the technical 
consultant for anytime.if more terrible,we can send our engineers to your factory.
  We will provide same good after-sale service as the pre-sale service, any of your questions,
we will be replied within 12 hours.

If you need more further details about our machine,  please feel free to contact us .