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GmbH&Co.KG
min 0.02
0.17
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2
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11
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6
1 - surface, on which the force sensitive
quartz crystal is mounted
2 - force sensitive quartz crystal EPKV-10M.
3 - undercut.
4 - contact leads.
FORCE SENSITIVE QUARTZ CRYSTAL EPKV-10M
APPLICATIONS
The force sensitive quartz crystal EPKV-10M is intended for operation
in a structure of precision electronic balances. It converts face shear
strain into a frequency variation. Using this crystal, it is possible to design
balances for weighing with a split-hair accuracy of weights by a mass
from several milligrams up to hundreds of kilograms.
FEATURES
- High resolution and accuracy
- Long term quartz crystal stability
- Wide temperature range (-40…+80 °C)
- Low power consumption
- Suitable for precision weighting equipment
- Cost effective
OPERATING CONDITIONS / ELECTRICAL CHARACTERISTICS
PARAMETERS SPECIFICATIONS AND REMARKS UNITS
Electrical characteristics
Frequency range (fundamental mode), fO 9960…10100 kHz
Resonance Resistance typ./max., Rr 30; 50 / 50 kΩ
Drive Level max., DL 1.0 mW
Operating conditions
Force sensitivity 3.5 ± 0.3 Hz/gm
Operating temperature, TOPR (typ./max) -40…+80 / -60…+100 °C
Storage temperature, TSTR +5…+40 °C
Maximum frequency deviation 9.8 ± 0.85 kHz
Maximum stress-strain load ± 5…± 20 kg
Frequency Tolerance, ∆f/fO ± 50 ppm
Aging first year/next years max. ± 5 / ± 25 ppm
Static Capacitance typ., CO 9.1…8.1 pF
Capacitance ratio r 200
Size 4 x 10 x 0.17 mm
One side with one electrode of the force sensitive quartz crystal EPKV-10M is glued by epoxy
adhesive on a cleaned and skim surface, thus the central part of the crystal should be free (see
figure). After curing of the glue, the two wires are soldered to the contacts of the crystal, if required.
If the crystal is in a free condition, its force sensitivity characteristic is practically linear.
If the crystal is mounted, a nonlinearity of the force sensitivity characteristic occurs, which must be
determined individually.
EXTERNAL DIMENSIONS
UNITS: millimeters
