Nova-Tech WBW Series - Manual (Page 16)

© Adam Equipment Company 2009 14
12.0 CALIBRATION
12.1 WBW-M APPROVED SCALES, CALIBRATION PROCEDURE
The scales are sealed to prevent unauthorised access to the circuit boards
and load cell.
One method calibration of the WBW-M scale is accomplished by breaking the
security seals to gain access to the circuit boards inside. See the figures on
the security seal as given below.
WARNING: BREAKING OF THE SEALS MAY MAKE IT ILLEGAL TO USE
THE SCALES FOR SALES OF GOODS. CONTACT YOUR TRADING
STANDARDS OFFICE FOR FURTHER ASSISTANCE.
12.2 SECURITY SEALS
Method of sealing
Alternative method
The scale has got metallic loops on the base
and the cover, located at the right rear corner
as shown here. A metal pin or wire can be
passed through the loops and sealed using a
lead-wire seal. Ensure the seal is secured
enough to prevent removing the cover
without breaking the seal or damaging the
enclosure.
An alternative method would be to use
tamper-evident labels over the screw on the
bottom cover and over the joint between the
top and the bottom cover as shown in the
adjacent figure.
Metrology labels and additional security
measures may be added to the scale as
required by the national legislation.
NOTE: IF THIS SEAL IS BROKEN THE SCALE MUST BE RE-SEALED BY
THE RELEVANT AUTHORITIES USING EITHER THE LEAD WIRE SEAL
OR AN ACCEPTABLE SEAL BETWEEN THE COVER AND THE BASE.