The number is located on the sticker on the box and below the receiver, the first 6 numbers indicates the date, and following the sequence EIHP audits and products.
Example of S / N 4B012017001254S
The first number is the last digit, in this case 2004.
The second digit or letter indicates the month, according to this table below, in this case the letter B, which means that it is 11 months.
1-Jan.
2-Feb.
3-Mar.
4-Apr.
5-May.
6-Jun.
7-Jul.
8-Aug.
9-Sep.
A-Oct.
B-Nov.
C-Dec.
The third and the fourth digit will indicate the date of the month, in this case it is 01.
Fifth and sixth digit indicates the model by the following table, in this case No. 20 indicates that it is a DM500
09-DM7020
01-DM7000
10-DM5600
11-DM5620
04-DM600
20-DM500
12-500 +
13-DM800
behind these labels models, is the number of audits, and 00 and the serial number
