Kaman KDM-8200 - Manual (Page 39)

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Kaman Precision Products
Appendix B: System Modification
Synchronization
Multiple channels in the same chassis, or sensors that are within three diameters of each
other or have multiple ground loops, must be synchronized together. (When measuring
channels are purchased with a chassis, they will have been synchronized at the factory.)
Working in area “A” on the PC board diagram, cut the trace at E14 on all slave modules.
The master module must be in the left-most electronics slot of the chassis. Also, the
channels must be jumped together per the wiring information in Part 3: EQUIPMENT of
this manual: pin 28C to pin 28A across all channels, making sure that these pins are not
connected together on the same module. If any of the channels are removed, modules to
the right will become inoperative.
Offset Jumpers
Offset (i.e. Zero control) range can also be changed by cutting traces or installing jumpers
(Zero Control on the PC board. This area is marked with a ‘B’ on the PC board diagram.
Range Setting)
Standard (Maximum) Offset Range:
Connect E13 to E12 and E8 to E9. This is the standard configuration and the connection
is normally made in etch on the PC board. This allows the largest range of offset (zero)
adjustment, but the offset control will have the least resolution and may seem too
sensitive when trying to dial in a specific value with high precision.
High Offset Range:
Cut the trace or remove the jumper between E12 and E13. This trace has an ‘H’ marked
next to it. There should be either a jumper or etch between E8 and E9.
Low Offset Range:
Cut the trace or remove the jumper between E8 and E9. This trace has an ‘L’ marked
next to it. There should be either a jumper or etch between E12 and E13. This will have
the smallest range of offset adjustment, but the offset (zero) control will have more
resolution.
Gain
A jumper position for adjusting gain is located on the printed circuit board inside the
Jumpers system module. Typically, this trace appears as an etch on the PC board. When the
trace is cut, the system gain will increase by a factor of roughly 2.5.
If you are calibrating the system to a gain other than that originally done at the factory,
you may need to either cut the trace or remove a jumper connecting E10 to E11. The
gain jumper position is shown in area ‘B’ of the PC board diagram.