Pairing of a User Interface Unit with a Meter

A user interface unit (UIU) is a remote access terminal for STS prepayment meters. The device is placed inside the user’s premises, while the energy meter is mounted outside and mostly not direct accessible. Some meter manufacturers are using the term customer interface unit (CIU). The functions are the same.

The main purpose is to charge the meter with credit. By various short-codes, it’s possible to do many kinds of queries for meter status and consumption. The short codes are not unified, so refer to your user manual for operation.

UIUs are paired with the energy meter when leaving our factory. Depending on the utility order, CLOU interface units are communicating with the meter by radio frequency (RF), power line (PLC) or by wired RS-485.

User Interface Unit

If the UIU is not communicating with the energy meter, you can pair it again by typing 1593570 and the 11 or 13 digit meter number, then press the enter key (red or blue). The meter number is printed on the meter and on your customer card, which you use to buy credit.
After successful pairing, the display will show OK.
Note: This is only working for CLOU energy meters.

There can also be other reasons for a communication fail. If the UIU is connected by power line and you are disconnected, batteries need to be inserted in the UIU to recharge the meter or query the status. If this meter is in tamper mode, a recharge is impossible before clearing the tamper.

Editor's note: This article was originally published in August 2020 and has been updated for comprehensiveness.

211 Replies to “Pairing of a User Interface Unit with a Meter”
  1. hi, where can i get my uiu 11 digit meter number, because there are more than 11 digits on the card i was given.

    1. Newer meters might have already a 13 digit meter number. The standard has recently changed. The UIU pairing sequence is the same.

  2. Hello I’m an electrician,could you assist me with error codes i.e 1-9 with there corresponding meaning

    1. First of all, you need to initialize the UIU. Below is the process:
      Step1: Input ‘1593570’ + 999′ + Enter’ to initialize the UIU
      Step2: Input ‘1593570’ + “11-digit meter number’ + Enter to pair the meter with UIU.
      Step3: Input ‘999’ + enter’ to check the paired meter, and 12-digit address’ will be displayed on the UIU

  3. I had this tenant and left with the ciu… Is there a way i can load tokens using another ciu

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