User Manual

C HAPTER 8:LEGAL- FOR-TRADE
49
SEALING AND AUDIT TRAILS
Most legal-for-trade installations will require the indicator to be sealed. A
sealed indicator cannot be accessed for setup or calibration changes without
breaking a physical seal or incrementing an event counter, thus providing
evidence that the unit has been tampered with. Each member of the 60
Series has two types of sealing provisions:
• Physical seal used in conjunction with an internal program jumper
• Three-event audit trail counter
Check with your local weights and measures authority to determine which
method(s) are required.
PHYSICAL SEAL
The most common sealing method is a lead-wire seal. All standard units
provide two tamper-proof screws used for sealing the rear panel to the front
of the enclosure. A lead-wire seal can be applied by passing the lead-wire
seal wire through a hole in these two screws, thus preventing the screws
from being removed without breaking the seal. The 60 Series panel mount
versions use a lead-wire seal and one screw. The Model 663 has a locking
clasp on the front door to which the seal can be applied, or the scale can be
sealed using the same method as that used with the panel mount versions.