Ohaus CD-11 Indicator Manual en - Manuel (Page 20)

20
3.1 Legal for Trade (LFT) Operation and LFT Sealing
Legal for Trade (LFT) operation is possible through a software controlled LOCSW menu which can be set to lock out
the Calibration, Setup, Readout, and Print menus by setting the lock switch function to ON. Setting the lock switch
menu settings to ON locks out the menus. When the menus have been locked out and the Indicator has been
calibrated, the Indicator can be used to operate in a legal for trade application after sealing. The software settings
works in conjunction with a Lock Switch ( CAL jumper) located on the PC board. The Indicator MUST be calibrated
prior to performing this proceedure.
Procedure
• Perform the procedure in paragraph 2.7.7 and set all
menu items ON. This effectively locks out all menus
from being changed but can be viewed.
• Remove the front cover from the Indicator to expose
the PC board, tilt it back. Be careful as the cover is
connected to the PC board by a flexible cable.
• Refer to the illustration on the left and notice the
position of the CAL jumper. This is shown with the
jumper in place. To lock out the menus, remove the
jumper and position it on one pin as shown in the
second illustration. This removes the jumper and
stores it in the event it has to be replaced.
• Replace the four cover screws and one sealing
screw.
• Replace the batteries and battery cover.
NOTICE: The CD-11 has been tested and found to
comply with Class lll requirements of NIST Handbook 44.
After the Indicator 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
• Replace the 6-32 Phillips pan head screw with the
hex socket security screw and washer in the plastic
bag containing the accessories. See illustration at
left. Place wire seal through the hole as shown and
hex head screw, compress lead seal in place.
PAPER SEAL
• If an audit trail or paper seal will be used, install the
6-32 pan head screw to the case and place seal over
the screw area. The sealing area is located on the
bottom of the case in a recessed area.
PC Board Connections.
CAL Jumper Shown in Stored or ON Position.
Sealing Methods
CD-11 Indicator