MAGUS

BKK-A

These transducers provide not only resolution twice as high as conventional systems but also outstandingly improved temperature characteristics and long-term stability.

The BKK-A series inclination transducers on surface of structure. available in two types, uniaxial and biaxial, are designed to measure minute inclination quantities. They are suitably used in combination with a structural settlement transducer for measurement of the disturbance resulting from nearby engineering works as well as for measurement of landslide-initiated inclination of the ground surface. These transducers provide not only resolution twice as high as conventional systems but also outstandingly improved temperature characteristics (temperature effect on zero balance ??0.36 seconds/??C with ??1?? rated capacity) and long-term stability (??0.5% RO). Furthermore, a stopper for detector protection is provided to ensure high handling efficiency in a total working flow from transportation to installation and measurement. Also, their structure, with highly viscous damping oil filled in, improves vibration resistance.

Features

?? External stopper provided
?? Improved vibration resistance
?? Biaxial type available (BKK-A-D)

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Specifications

Model	Measuring Direction	Rated Capacity	Rated Output	Weight (Approx.)
BKK-A-1	Uniaxial	??1??	2 mV/V (4000 ??m/m) or more	6kg
BKK-A-1-D	Biaxial	??1??	2 mV/V (4000 ??m/m) or more	6.8kg
BKK-A-2	Uniaxial	??2??	3 mV/V (6000 ??m/m) or more	5.5kg
BKK-A-2-D	Biaxial	??2??	3 mV/V (6000 ??m/m) or more	6.3kg

* Rated output is for a range from minus rated capacity to plus rated capacity.
* Model with a rated capacity of ??0.5 or ??5 can also be manufactured.
(Contact a KYOWA sales representative for detailed specifications.)
* Models with temperature measuring function can also be manufactured.

Performance
Nonlinearity	Within ??0.5% RO
Hysteresis	Within ??0.5% RO
Rated Output	See table above

Environmental Characteristics
Safe Temperature Range	-20 to 70??C
Compensated Temperature Range	-10 to 60??C
Temperature Effect on Zero Balance	Within??0.005%RO/??C
Temperature Effect on Output	Within??0.02%/??C
Long-Term Stability	Within ??0.5% RO/6 months *

Electrical Characteristics
Safe Excitation Voltage	10V AC or DC
Recommended Excitation Volta	1 to 2 V AC or DC
Input Resistance (at 0??C)	350 ?? ??1%
Output Resistance (at 0??C)	350 ?? ??1%
Cable	4-conductor (0.3 mm ² ) chloroprene shielded cable,
	7.6 mm diameter by 1 m long, bared at the tip
	(2 cables for biaxial models)

Mechanical Properties
Safe Overload Rating	120%
Interference	Within??1% RO
Material	Chromate-plated
Protection Rating	IP56 (JIS C 0920)
Weight	See table above

* This value is based on actual measurement and stated with dispersion taken into consideration. Stability slowly changes during a few months after installation, and then tends to become constant.

Standard Accessory

Stopper fixing wing nut

Optional Accessories

Wall-Mounting Fixtures
Designed to mount BKK-A transducers onto a wall surface; chromate-plated. BD-11A for mounting one unit ??and BD-12A for mounting two units.
??Horizontal Surface-Mounting Fixtures
Designed to mount BKK-A transducers onto a horizontal surface; chromate-plated. BD-31A for mounting one unit and BD-32A for mounting two units.
??Protection Covers
Designed to protect BKK-A transducers against external mechanical force; metal covers painted in grey.BD-21A for BD-11A, BD-22A for BD-12A,BD-41A for BD-31A, BD-42A for BD-32A

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