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
UNITS
kHz
kΩ
mW
Hz/gm
°C
°C
kHz
kg
ppm
ppm
pF
mm
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.
Static Capacitance typ., C
O
Capacitance ratio r
Size
3.5
±
0.3
-40…+80 / -60…+100
+5…+40
9.8
±
0.85
±
5…± 20
±
50
±
5 /
±
25
9.1…8.1
200
4 x 10 x 0.17
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
4
1
2
0.17
1 - surface, on which the force sensitive
quartz crystal is mounted
2 - force sensitive quartz crystal EPKV-10M.
3 - undercut.
4 - contact leads.
11
6
3
4
min 0.02
GmbH & Co. KG
Wasemweg 5
D-74821 Mosbach
Germany
page
1(1)
www.AXTAL.com
fon: +49 (6261) 939834
fax +49 (6261) 939836
E-mail: info@axtal.com
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