Wiktor Wise
Reading old electric date codes can be useful for determining the age of an appliance or electrical wiring. While wiring generally doesn't have dates, date codes on appliances can be found next to the serial number or in the owner's manual. These date codes usually consist of four numbers, with the first two digits indicating the year of manufacture and the last two digits indicating the week of manufacture. For example, the date code 1734 means the appliance was manufactured in 2017 during the 34th week. Some date codes may use a different format, such as YYWW or WWYY, where YY represents the year and WW represents the week number. Knowing how to read these date codes can help identify if parts are in good working condition, as older parts may have issues like dead batteries or outdated firmware.
| Characteristics | Values |
|---|---|
| Date code format | YYWW or WWYY |
| First two digits | Last two digits of the year |
| Second two digits | Week of that year |
| Example | 1734 (manufactured in 2017 during the 34th week) |
| Date code location | Next to the serial number beneath the barcode |
| Owner's Manual | May be used to help pinpoint the date of manufacture |
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What You'll Learn
- GE serial numbers begin with two letters, followed by six numbers, with a letter at the end
- The first letter identifies the month and the second, the year
- Date codes consist of four numbers: the first two indicate the year, and the second two, the week of manufacture
- GE PLC date codes refer to parts in current families supported by GE
- Owner's Manuals usually have a date listed on the front or back page
GE serial numbers begin with two letters, followed by six numbers, with a letter at the end
GE serial numbers typically begin with two letters, followed by six numbers, and end with one letter. The first letter of the serial number indicates the month the appliance was manufactured, while the second letter represents the year. The six numbers that follow are typically a production number that indicates where the product falls within a production run. Finally, the last letter is usually a check digit used to validate the serial number.
The month is indicated by a letter, with each month assigned a different letter. For example, A could represent January, B for February, and so on. However, the letter "I" is usually skipped to avoid confusion with the number one or the letter "L."
The year is represented by the second letter in the serial number sequence. Each year is assigned a different letter, typically following an alphabetical sequence. For example, the letter A could represent 2020, B for 2021, and so forth.
The production number that follows is unique to each appliance and indicates its place in the production run. This number can help identify when and where the appliance was manufactured, as well as provide information about the specific batch or lot it belongs to.
Finally, the last letter serves as a check digit to validate the authenticity and accuracy of the serial number. This letter is calculated using a formula or algorithm based on the previous characters in the serial number. By using a check digit, manufacturers can help ensure the accuracy of the serial number and prevent errors or tampering.
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The first letter identifies the month and the second, the year
When trying to determine the age of an appliance, it is important to refer to the serial number, not the model number. The serial number tells you the month and year the appliance was made. The first letter identifies the month and the second letter identifies the year. For example, if the serial number begins with the letters "GA", the appliance was manufactured in April of 2001 or April of 2013. The letter that corresponds with the year rotates approximately every 12 years, so some serial numbers may point to different years.
The Owner's Manual can often be used to help pinpoint the date of manufacture. Most Owner's Manuals have a date listed on the front or back page of the manual. This is usually printed next to a publication number and looks something like 02-20 (February of 2020), 01-21 (January of 2021) or 04/17 (April of 2017). The print date may not exactly match the month and year from your serial number, but as long as it is close, it will verify that you have determined the correct age.
Date codes for parts consist of four numbers. The first two digits indicate the year the part was manufactured, and the second two digits indicate the week of that year. For example, 1734 was manufactured in 2017 during the 34th week of the year (August 21st-27th).
It is important to note that some chips may be difficult to read the date code from, as they may not have date codes or may be in a different format. The date code is usually in either YYWW or WWYY format, where YY stands for the last two digits of the year and WW stands for the week number of the year.
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Date codes consist of four numbers: the first two indicate the year, and the second two, the week of manufacture
Date codes are an essential way to determine the age of a product, and they are especially useful when it comes to rotating stock or tracking products in the event of a product recall. They are usually represented by a series of numbers or letters.
Date codes for tires follow a specific format. The first two digits designate the week of the year the tires were made, and the final two digits are the last two digits of the year of manufacture. For example, a date code of "1319" means the tire was manufactured in the thirteenth week of 2019.
Tires manufactured before the year 2000 will have a slightly different date code. The date code will consist of three digits, with the first two digits listing the week of the year, and the last digit being the last digit of the year. For example, a date code of "529" could mean the tire was manufactured in December 1999, December 1989, or even December 1979.
Computer chips also use a four-digit date code. The first two digits represent the year, and the last two digits represent the week of manufacture. For example, a code of "1722" would mean the chip was made in the 22nd week of 2017.
Perishable food items use a similar system, with a "use by" or "sell by" date, followed by a 5-digit code. The first two numbers stand for the year, and the last three digits represent the day of the year.
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GE PLC date codes refer to parts in current families supported by GE
When purchasing PLCs, it's important to check the DATE CODE to ensure you're buying parts that are in current and good working condition. GE PLC date codes consist of four numbers. The first two digits indicate the year of manufacturing, and the second two digits indicate the week of that year that the part was manufactured. For example, the date code 1734 means the part was manufactured in 2017 during the 34th week (August 21st-27th).
New parts in the 90-30, Genius, Rx3i, and Versamax families – current families supported by GE – should have date codes from 2016 and 2017. Some new 90-70 parts from Qualitrol will have older date codes, but these parts were manufactured by GE.
Parts with older dates (5 years or older) may have issues that could interfere with the performance of your system or even shut it down. Older parts may have dead batteries, corroded capacitors, or outdated firmware. Therefore, when purchasing PLCs, it's crucial to check the date code to ensure the parts are in current and good working condition.
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Owner's Manuals usually have a date listed on the front or back page
Owners' manuals are a great way to determine the manufacturing date of an appliance. Most owners' manuals have a date listed on the front or back page, usually printed next to a publication number. This date is often in a serial format, such as 02-20 (February 2020), 01-21 (January 2021), or 04/17 (April 2017). The print date may not always match the serial number exactly, but as long as it is close, it confirms the correct age of the appliance.
The owner's manual can be a helpful tool when the serial number of the appliance might indicate different years. For example, a serial number starting with "AD" could mean the appliance was manufactured in January 2002 or January 2014. In such cases, the owner's manual can help pinpoint the correct year of manufacture.
It is important to note that the manufacturing date is different from the serial number, which is used to identify the date an appliance was manufactured. The serial number usually consists of two letters, followed by six numbers, and then another letter at the end. The first two letters indicate the month and year of manufacture. For instance, the serial number "GA" translates to April 2001 or April 2013.
The second letter, which represents the year, rotates approximately every 12 years, so some serial numbers may correspond to multiple years. By cross-referencing the serial number with the owner's manual print date, you can accurately determine the age of your appliance.
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Frequently asked questions
Date codes are usually located next to the serial number, which can be found beneath the barcode.
Date codes consist of four numbers. The first two digits indicate the year the part was manufactured, and the second two digits indicate the week of that year. For example, the date code "1734" means the appliance was manufactured in 2017 during the 34th week.
In this case, YY stands for the last two digits of the year, and WW stands for the week number of the year. For example, the date code "8332" means it was made in 1983 during the 32nd week.
Wiring generally doesn't have dates, and it is hard to find the manufacturing date of an electric appliance without a date code. However, you can refer to the Owner's Manual, which usually has a date listed on the front or back page.
