EPKV-10M Datasheet, PDF (1/1 Pages) Advanced XTAL Products – FORCE SENSITIVE QUARTZ CRYSTAL

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
Electrical characteristics
Frequency range (fundamental mode), f_O
Resonance Resistance typ./max., R_r
Drive Level max., D_L
9960…10100
30; 50 / 50
1.0
Operating conditions
Force sensitivity
Operating temperature, T_OPR (typ./max)
Storage temperature, T_STR
Maximum frequency deviation
Maximum stress-strain load
Frequency Tolerance, ∆f/f_O
Aging first year/next years max.
3.5 ± 0.3
-40…+80 / -60…+100
+5…+40
9.8 ± 0.85
± 5…± 20
± 50
± 5 / ± 25
Static Capacitance typ., C_O
Capacitance ratio r
9.1…8.1
200
Size
4 x 10 x 0.17
UNITS
kHz
kΩ
mW
Hz/gm
°C
°C
kHz
kg
ppm
ppm
pF
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.
UNITS: millimeters
4
EXTERNAL DIMENSIONS
1
0.17
2
1 - surface, on which the force sensitive
quartz crystal is mounted
2 - force sensitive quartz crystal EPKV-10M.
3 - undercut.
3
4 - contact leads.
4
min 0.02
GmbH & Co. KG
Wasemweg 5
D-74821 Mosbach
Germany
page 1(1)
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