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VALLEY FORGE & BOLT MANUFACTURING COMPANY
4410 W. Jefferson St. • Phoenix, AZ 85043 • USA
1.3.3 406A Unit – Rear View Descriptions
4
BATTERY COMPARTMENT
The battery compartment of the 406A contains three AA batteries as well as the means to
calibrate the unit and to enable/disable the Bluetooth.
5
ENCLOSURE SCREWS (x6)
These screws fasten the enclosure top to the enclosure bottom of the 406A unit. These screws
should never be removed as there is zero user serviceable parts inside the enclosure.
"OFFSET"
6
ADJUSTMENT
A dial used in calibrating the 406A unit. This dial is used to adjust the calibration offset value and
should be used in conjunction with the 0% end of the calibration gage supplied with this unit.
"GAI N"
7
ADJUSTMENT
A dial used in calibrating the 406A unit. This dial is used to adjust the calibration gain value and
should be used in conjunction with the 100% end of the calibration gage supplied with this unit.
8
BLUETOOTH "ON/OFF" SWITCH
The Bluetooth "ON/OFF" switch enables or disables Bluetooth on the 406A unit. The Bluetooth is
enabled when the switch is in the "BT-ON" position. The Bluetooth is disabled when the switch is
in the "BT-OFF" position. To save battery life, disable the Bluetooth when not in use.
9
AA BATTERY CONTACTS
These battery contacts hold the three AA batteries (R6 size) that power the 406A unit. It should
be noted that the battery contacts are designed to be tight to limit contact fatigue over the unit's
years of service. Use the supplied Helper Tool to assist when installing and removing batteries.
SPC4™ SYSTEM • MODEL 406A • USER'S MANUAL
See Figure 2 - 406A - Rear View
- Page 8 of 21 -
PHONE: (602) 269 - 5748
WEB: www.vfbolts.com
Rev. 1.0
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