GK-4110G10 GK4110G10, GK-3100, GK3100, GK-2110, GK2110, Impulse Hammer, Modal analysis

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Impulse Hammer GK series

Impulse Hammer

GK series

Features
System configuration
Overview Specifications
Options
Frequency Response Characteristics according to Tip types

GK series impulse hammer is an excitation hammer which has a built-in force sensor to measure a natural vibration frequency or perform modal analysis of a mechanical structure.

In addition to the GK-3100 for general purpose usage, the GK-2110 is an ultra compact type weighing of 4.8 g for excitation of small and light-weighted parts. For excitation of large structures such as automobile’s framework structure, the large type of the GK-4110G20 weighing of 1.1 kg is suitable. You can choose any one depending on your requirements.

By mounting an accelerometer on a measurement object and hitting it with impulse hammer, excitation force signals from an impulse hammer and response acceleration signals from an accelerometer are input to an FFT analyzer to enable measurement of the frequency response function (natural frequency). Moreover, you can perform modal analysis of the object by sending the obtained frequency response function data to a PC in which modal analysis software is installed.

Features

GK-2110

As a light-weighted of 4.8g (when attached with a plastic hammer handle), the GK-2110 enables excitation for noise analysis from a small case of HDD or thin pipe in compressor etc. and its measures.
Up to around 20 kHz of excitation is available.
2 kinds of hammer handles are provided as standard to meet your requirements. The hammer with a plastic hammer handle can be used as an excitation for exceptionally-light measurement object. Whereas the hammer with aluminum hammer handle provides a large excitation force.

GK-3100

Attaching an extender mass (provided as standard) on the GK-3100 (140 g as standard) weighs a total of 220 g. Only using the GK-3100 gives a wide range of excitation force.
Exclusive sensor amplifier is provided as standard.
4 kinds of impact tips are provided as standard. Excitation frequency can be changed according to requirements of your test structures.

GK-4110G20

With the hammer mass of 1.1 kg, analysis of the vibration of the frame which affects the working accuracy and the excitation for the mode analysis of the white body of the automobile are possible.
With built-in CCLD preamplifier, direct connection to analyzer is possible.
Four types of impact tips are included as standard. It is possible to change the vibration frequency according to the application.

System configuration

Overview Specifications

	GK-2110	GK-3100	GK-4110G20
Measurement range	220 N	2,200 N	22,000 N
Detection element	Crystal	Crystal	Crystal
Sensitivity	22.5 mV/N	2.3 mV/N	0.23 mV/N
Resonance frequency	100 kHz or more	31 kHz or more	12 kHz or more
Excitation Frequency range (when hard tip in use)	Up to 20 kHz	Up to 8 kHz	Up to 1 kHz
Hammer weight	4.8 g (when attached with a plastic hammer handle)	140 g	1,100 g
Head diameter	6.3 mm	15 mm	51 mm
Tip diameter	2.5 mm	6.4 mm	51 mm
Hammer length	107 mm	203 mm	370 mm
Output connector	Aluminum hammer handle (5-44 coaxial connector) Plastic hammer handle (directly-attached cable, miniature 10-32 connector)	BNC(CO2)	BNC(CO2)
Output signal	Voltage output with CCLD compatible	Voltage output with CCLD compatible	Voltage output with CCLD compatible Applicable to TEDS (Ver. 1.0)
Output impedance	100 Ω or less	100 Ω or less	100 Ω or less
CCLD power supply	2 to 20 mA, +18 to +30 VDC	2 to 20 mA, +18 to +30 VDC	2 to 20 mA, +18 to +30 VDC
Sensor amplifier	Sold separately: SR-2210	Provided as standard: Power supply unit (sensor amplifier) Sold separately: SR-2210	Sold separately: SR-2210
Cable	Provided as standard: GK-0132 (3 m, for aluminum hammer handle)	Provided as standard: Signal cable (3 m) Sold separately: GK-0122 (3 m)	Sold separately: MX-100 series
Accessories	Storage case Extender mass^*1 Wax Impact tip (vinyl) 5-44=10-32 cable (3 m) Hammer handle (aluminum, plastic) Data sheet	Storage case Extender mass Power supply unit (sensor amplifier) Cable for hammer (BNC, 3 m) Cable for signal output (BNC, 0.9 m) Impact tip set (super soft, soft, medium, hard) Data sheet	Storage case Impact tips set (super soft, soft, medium, hard) Data sheet

NP-0021 conversion connector is required when GK-2110 is connected to BNC connector.
*Signal cable is not provided as a standard for the GK-4110G20.
*Sensor amplifier is not provided as a standard for the GK-2110 and GK4110G20. SR-2210 2ch sensor amplifier can be used.
*1: Extender mass should be mounted when the hammer with aluminum hammer handle is used.

Options

Cable and Connector

Product name	Model name	Applicable model
Signal cable (3m)	GK-0122	GK-3100/4110G20
Signal cable (3m)	GK-0132	GK-2110
Miniature/ BNC conversion connector	NP-0021	GK-2110

Options for GK-2110

Product name	Model name
Impact caps (5 pieces)	GK-0205
Extender mass	GK-0211
Plastic hammer handle	GK-0221
Aluminum hammer handle	GK-0222

Options for GK-3100

Product name	Model name
Medium tip	GK-0503
Super soft tip	GK-0504
Soft tip	GK-0505
Hard tip	GK-0506

Options for GK-4110G20

Product name	Model name
Medium tip	GK-0403
Super soft tip	GK-0404
Soft tip	GK-0405
Hard tip	GK-0406

Frequency Response Characteristics according to Tip types

GK-2110

GK-3100

GK-4100G20

Revised:2020/01/14

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