2 MHz LCR Meter Kit AU2019 Assembly Manual
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18
Note:
As long as all calibrations are not carried out at least once, no cor-
rection is made to the measured value. That's why "open-circuit" and
"short-circuit" calibration should be completed without the Kelvin ca-
bles. From then on, values displayed are compensated for the internal
measurement path, up to the BNC connectors!
After that, whatever external measuring device will be used, you have
to repeat the "open-circuit" and "short-circuit" with this device in place.
6 • Final mounting in the Hammond case
Slide the MCU board slightly out of the case and fit the 6 mm M3
male-female (MF) standoff into the hole next to the “J15” marking
using the last nut.
M3 (Prevailing Torque
Type Hex Thin Nut)
MCU PCB
6 mm standoff MF
Washer (thickness = 0.5 mm)
Screw M3 (length = 4 mm)
Hammond Case
19. Final securing of the MCU PCB in the Hammond case.
Align the MCU board so that the threaded hole in the 6 mm standoff
faces the hole in the bottom of the case. Slide in the 0.5 mm thick
washer and secure the assembly with the 4 mm M3 countersunk screw.
Note:
For the fixing of the main PCB to the case it is more conven-
ient to put the 0.5 mm flat washer under the PCB (on the male part
of the standoff).
Mount the USB and BNC sides using the plastic frames and the spe-
cial screws. The bag usually contains a spare screw.
Pay attention
to the sequence!
Mount the black frames first, then screw on the
aluminum flanges. Not the other way around, otherwise tightening
the screws could break the corners of the plastic frames.