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For registration of temperature with high accuracy individual calibration RKTV206 in structure with the oscillator is required (achievable resolution in structure of the oscillator up to 0.05 PPM). Based on the temperature sensing quartz crystal resonators RKT206 the digital medical thermometer, electronic digital and analog controllers and industrial thermometers (accuracy class up to 0.1%) are developed and made.

 

FORCE SENSITIVE QUARTZ CRYSTAL EPKV-10M

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  ЭПКВ-10М

APPLICATIONS
Force sensitive quartz crystals EPKV-10M are intended for operation in a structure of precision electronic balances and serves for conversion of efforts of stress-strain to a frequency. 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 kilograms.



- 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

PARAMETERS

SPECIFICATIONS AND REMARKS

UNITS

Electrical characteristics

Frequency Range (Fundamental mode), fO

9960...10100

kHz

Series Resistance typ./max., RS

30; 50 / 50

Ohm

Drive Level max., DL

1.0

mW

Operation 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 Limited Load Of Stress-Strain

± 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

200

 

Size

4 x 10 x 0.17

mm

 A side with one electrode of the force sensitive quartz crystal EPKV-10M is glued by epoxy adhesive on preliminary cleared and skim surface, thus the central part of the crystal should be free (see figure). After drying glue the two wires are soldered to contacts of the crystal, if it is required.
If the crystal is in a free condition, its force sensitivity characteristic is practically linear.
If the crystal is pasted, a nonlinearity of the force sensitivity characteristic it is necessary to determining individually.
Based on the force sensing quartz crystal EPKV-10M the several models of the balances are developed and made.

EXTERNAL DIMENSIONS

UNITS: millimeters

epkv dim

 

1 - surface, on which one pastes the force sensitive quartz crystal EPKV-10M.

2 - force sensitive quartz crystal EPKV-10M.

3 - undercut.

4 - contact surfaces.

 

 

 

 

 

 


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