Technical Bulletins

By |February 28th, 2014|Library|0 Comments|

Jim Bakers Remote Technologies UK-WITS presentation V2

By |February 28th, 2014|Library|0 Comments|

The Device Catalogue

WITS Certified devices are listed on the website as being WITS Verified or WITS Self-Certified. Details of a device’s certification are published on the WITS PSA website as follows:

1.      To be successfully listed the vendor has submitted a completed Application Form with details of how the Device has been tested and with which communications media. The completed Application Form for a particular device is available for download to WITS PSA members from the Device Catalogue […]

By |February 28th, 2014|Certification|0 Comments|

Protocol version

Devices can achieve Verified and Self-Certified status at any WITS protocol version if they fulfil the acceptance criteria as described in the WITS Compliance Testing Manual. The WITS device catalogue on the WITS website will list the highest protocol version level that every device has achieved for each status.

By |February 28th, 2014|Certification|0 Comments|

Process for claiming certification

7-steps-certificationThere are seven steps in the process:

Step 1

Become a member of the WITS Protocol Standards Association.

Step 2

Complete the appropriate tests as follows:

Note: Testing MUST be done using the PSA Test Specification (purchased from the PSA). The test results must be submitted to the PSA.

Method of Testing – device to be Self Certified

Tests are carried out by the vendor themselves using either an […]

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Future Protocol developments


The WITS protocol is in continuous active development. New products should be developed against the most recent set of WITS Application Notes, claim compliance at the current WITS protocol version and use a current test specification.

Incremental changes to the major protocol version (e.g. 1.x->2.x) are assumed to involve significant changes to the software or system of a Field Device or Master Station. These may include significant new […]

By |February 28th, 2014|Certification|0 Comments|

Certification levels

Vendors may choose one of two levels of certification for their products:

Self-Certified – Tests are conducted by the vendor themselves using their own test equipment. Tests do not involve any third party.

Verified – Tests are carried out against existing WITS Verified devices in conjunction with the vendors of those WITS Verified devices. This ensures a greater level of confidence that the equipment complies with the protocol and […]

By |February 28th, 2014|Certification|0 Comments|

PSA Corporate Membership fees

Corporate membership fee levels have been set so as to cover the estimated costs of the PSA Committee, and to reflect the significant contributions made by the founder organisations during the Protocol Standards project.

  • Vendor registration fee: £ 1,000
  • Vendor membership fee £ 500 p.a.
  • User registration fee £ 200
  • User membership fee £ 300 p.a.

(Note: Vendor refers to manufacturers and suppliers of telemetry equipment; User refers to a UK Water Management organisation – the UK water companies […]

By |February 25th, 2014|The PSA|0 Comments|

How to join the PSA

  • Download a Corporate Membership form by clicking on the “Join now” tab at the top of the page.
  • Complete and sign it
  • Send it to the WITS PSA Secretary at the address on the “Contact us” page with your cheque
  • OR scan and email it to if you prefer to pay by bank transfer (bank details are on the form).

The applicant will then be registered as a Member on the website.

By |February 25th, 2014|The PSA|0 Comments|

Ownership and maintenance of the Standard

The WITS Protocol Standards Association (PSA) provides for the long term maintenance and management of the WITS-DNP3 Protocol Standard.  Members are drawn from the water industry – both users (mainly water companies) and vendors/manufacturers of telemetry equipment. The PSA has its own independent elected committee drawn from members of both the vendor and user communities.

The PSA has ownership of the Standard and has the responsibility to ensure that the long term maintenance of the Standard […]

By |February 25th, 2014|The PSA|0 Comments|