OHAUS TROOPER SCALE, Service Manual

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4-9
CHAPTER 4 MAINTENANCE PROCEDURES
4.2.6 Legal for Trade (LFT) Operation and LFT Sealing
Legal for Trade (LFT) operation is possible through a LFT Lock Switch located on the PC board. The
Scale must be calibrated prior to performing this proceedure.
Procedure
Set up Scale, and calibrate. After this is done,
remove power from the Scale.
Turn the scale over in the position as shown and
remove the Lock Switch cover plate.
Refer to the illustration at the left and notice the
position of the LFT switch. To lock out the menus,
slide the LFT switch to the position shown.
Figure 4-3. Lock Switch Location.
Replace the Lock Switch cover and housing
screw cover. The two screws are cross drilled
and can accept a wire seal.
NOTICE: The Trooper Scale has been tested
and found to comply with Class lll requirements
of NIST Handbook 44.
After the Scale has been tested and found to
comply with local applicable regulations by a
local weights and measures official, it may be
sealed as follows:
LEAD AND WIRE SEAL
See illustration at left. Place wire seal through
the holes in the screw and ribs as shown and
compress the lead seal in place.
PAPER SEAL
If an audit trail or paper seal will be used, place a
paper seal over both access covers.
Figure 4-4. Sealing the Scale with a Lead Seal.
LFT OFF
(UNLOCKED)
LFT ON
(LOCKED)
Figure 4-5. Sealing the Scale with a Paper Seal
PAPER SEALS