Speed ​​standard device model: BJL51-GZJY-3B
â–² Overview The BJL51-GZJY-3B type is the most popular speed standard device in the BJL51-GZJY series. Over 85% of the country's large and medium-sized power plants are equipped with this type of device. In addition to retaining the basic operation of GZJY-3B type, BJL51-GZJY-3B type (â…¤) has increased the selection of several types of voltage drive for active speed sensors. Various types of speed sensor signals can be connected to precision measurement and configured for universal use. The probe holder can be installed with various thread specifications or non-threaded sensors
â–² Features
1 Speed ​​digital setting
2 It can be used for the verification of various rotational speed instruments and rotational speed measurement systems such as rotational speed, reverse rotation protection and overspeed protection.
3 Complete configuration accessories, can verify the photoelectric or mechanical, handheld, contact or non-contact tachometer.
4 The configured universal probe holder can install multiple sensors at the same time, covering sensors with various thread specifications or non-threaded sensors, especially suitable for various specifications of magnetoelectric, magnetoresistive, Hall, eddy current Speed ​​sensor calibration.
5 Special accessories can be configured for various aviation tachometers (models are GZ-1, GZ-2, GZ-8A, GZT-1, GZT-2, A10,
T-45, etc.), marine tachometer, locomotive tachometer to verify.
6 Standard electrical signal source can be output to verify the secondary instrument of speed measurement separately
7 It is equipped with a speed sensor signal input interface, which can independently verify the speed sensor without the secondary instrument (several types of voltage drive are provided for active speed sensors)
8 Suitable as standard equipment for speed measurement of large and medium-sized enterprises and prefecture-level measurement departments
â–² Main technical indicators
1 Speed ​​range: 20 ～ 6600 r / min
2 Speed ​​uncertainty: 3 × 10-4
3 Speed ​​stability: 1 × 10-4
4 Time base performance: startup accuracy 5 × 10-6 daily stability 5 × 10-6
Time base frequency 10 MHz
5 Speed ​​resolution: 0.1 (20 ～ 600 r / min)
1 (600 ～ 6600 r / min)
6 Output standard electrical signals: frequency range 2 ～ 9999 Hz, accuracy 1 × 10-5, waveform square wave, amplitude 12V
7 Can output DC voltage: ± 5V, ± 12V, ± 24V
8 Requirement range for access to external test signals: 1 ～ 9999 Hz, amplitude greater than 0.5V
9 Chainring: Involute tooth profile, number of teeth is 60, modulus is 2, diameter 124mm
(A variety of gears with any number of teeth can be designed according to user requirements)
10 Mounting thread: There are 12 kinds of thread specifications on the sensor mounting plate:
Metric system: M10 × 1, M12 × 1, M14 × 1, M16 × 1, M18 × 1, M16 × 1.5, M18 × 1.5,
M20 × 1.5, M22 × 1.5 inch system: 1 / 4-40, 3 / 8-24, 5 / 8-18
11 Total power: ≤300 W
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