Request for Calibration Test Data for Speed Camera and Photographic Evidence
Perrin G made this Official Information request to New Zealand Police
The request was successful.
From: Perrin G
Dear New Zealand Police,
Reference to the Infringement Notice PC1223285.
I request the Calibration Test for the Speed Camera and a copy of
photographic evidence.
Yours faithfully,
Perrin Gibert
New Zealand Police
Dear Perrin
Thank you for your email, which has been forwarded to the correct
department for follow-up.
Kind regards,
PUBLIC AFFAIRS TEAM
NZ POLICE
-----Perrin G <[OIA #2471 email]> wrote: -----
To: OIA requests at New Zealand Police <[New Zealand Police request email]>
From: Perrin G <[OIA #2471 email]>
Date: 04/02/2015 10:46PM
Subject: Official Information Act request - Request for Calibration Test
Data for Speed Camera and Photographic Evidence
Dear New Zealand Police,
Reference to the Infringement Notice PC1223285.
I request the Calibration Test for the Speed Camera and a copy of
photographic evidence.
Yours faithfully,
Perrin Gibert
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From: STABLES, Mark
New Zealand Police
gilbert perrin 15 1103 photo.jpg
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Final reply P Gilbert OIA 15 2203.pdf
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Good afternoon Mr Gilbert.
Please find attached the following documentation as per your request under
the Official Information Act 1982.
1. A copy of the photograph outlining the offence in question,
2. Calibration certification information.
Your sincerely
Mark Stables
Inspector Mark Stables
Manager: Crash Investigation & Calibration Services | Road Policing
Support | New Zealand Police
P +64 4 494 9040 Extn: 42590 | M +64 27 556 1811 | E
[1][email address]
32 Glover Street, Ngauranga ,Wellington, PO Box 3017 Wellington 6011
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subject to the provisions of section 50 of the Policing Act 2008, which
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are not the intended recipient of this message or have received this
message in error, you must not peruse, use, distribute or copy this
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those of the New Zealand Police. If you have received this message in
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Tom McDonald left an annotation ()
Sorry to say that there is a good probability that you were not speeding WHEN the photograph says that you were. The following is a standard reply that the calibration laboratory gives. Note that the time is given a tolerance of two minutes! Also people in the calibration laboratory can not subtract one time from another and get the correct answer! There may well be an atomic clock in the laboratory - but it is used to calibrate cameras that drift a long way in the course of a year.
Regards
Tom McDonald
PCS is an ISO 17025 (International Standards Organisation) accredited laboratory - that is the highest accreditation in the world. Our laboratory is audited 3 times a year to ensure we retain our international accreditation.
There is a chain of traceability for all devices calibrated by PCS, back to New Zealand's national measurement standards which are in themselves traceable to the international system of units based in Paris.
The uncertainty of measurement of ±0.5 km/h calculated by MSLNZ (Measurement Standards Laboratory of New Zealand) takes into account all of the uncertainties in the instruments used to calibrate the camera as well as variations in the actual camera readings themselves. That uncertainty is specified on the Certificate of Accuracy for the speed camera – already supplied to you. If required Police can also provide the certificates of calibration (issued by MSLNZ) for all the test instruments that were was used to calibrate this particular speed camera system.
The speed camera clock is corrected annually with the time derived from a Fluke 910R rubidium clock. We allow ±2 minutes as our tolerance of time. A check of the clock for camera 162 against the calibrated Fluke 910R on 1 March 2017, shows a difference of 1 minute and 32 seconds (Fluke reading 13.39.52; Camera 162 13.38.30), well within the ±2 minutes tolerance.
You have provided no evidence of the accuracy of the GPS device you used nor when it might last have been calibrated to confirm its accuracy. All GPS manuals viewed to date, contain a disclaimer from the manufacturer that they will not accept responsibility for GPS's being used for legal purposes such as speed measurement.”
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