Manual 31 Guidelines for calibrating a binder distributor ... - Aapaq.org

PART B: DETAILS OF THE INSPECTION AND
TEST PROCEDURES TO BE CARRIED OUT
TO OBTAIN A CALIBRATION CERTIFICATE
FOR A BINDER DISTRIBUTOR IN
ACCORDANCE WITH SANS 3001-BT20
The purpose of the calibration procedure and certificate is to provide
an annual check of bitumen distributors to ensure that they are in a
reasonable condition, that the tank is clean and that there is a high
probability of achieving the desired result on site.
A credible and valid Calibration Certificate will give the assurance
that the binder distributor is operating correctly and that it is capable
of delivering the required application rate within the prescribed
tolerances. It is, however, not a guarantee of accurate and uniform
spraying capability. In addition to the annual Calibration Certificate
and depending on the nature and size of the project a number of
tests and inspections may be carried out on site prior to and during
spraying operations to ensure the required quality of spray work.
It is recommended that the calibration tests are carried out in the
order that they are listed below. This will ensure best time and
resource efficiency and will prevent repetition of some steps.
The Calibration Certificate as well as the calibration parameters,
such as road speed and pump output, are to be made available for
inspection on site to assess the extent to which site tests need to be
carried out and on-site performance monitored to ensure compliance
with the specification. The data should be kept on board the
distributor.
B.1 Required annual tests
The following tests specified in SANS 3001-BT20 are required for
annual certification of a binder distributor:
• SANS 3001 BT-21Validation of a binder distributor dipstick;
20