Dynamic Strainmeters Selection

Dynamic Strainmeters

Dynamic strain is a strain which varies with time. By measuring the dynamic strain caused by vibration, the dynamic behavior of a structure can be numerized and graphed in wave form. The analog signal is amplified, output and recorded to an external recorder. Till now many analog type dynamic strainmetes which basically need one strainmeter and one recorder for each channel have been used, but nowadays when data processing with a computer has become a must, digital type dynamic strainmeters which digitize analog signal (input signal) at high speed, once store in the internal data memory and transfer to a computer have gone mainstream. The digital dynamic strainmeters enabling 4, 8, 10 and 50 channel measurements with one unit are now available. Also, there are dynamic recorders with recording function which display numeric data and wave data and store them and dynamic strainmeters which perform on-line setup and data processing.

Bridge Excitation

The dynamic strainmeters are available with AC carrier or DC in bridge excitation. As the sensitivity is the magnitude of output to input strain, the higher the bridge excitation, the higher the sensitivity becomes. On the other hand,as the bridge voltage reflects the magnitue of Joule's heat and influences the temperature characteristics of sensors, there are instruments which can select bridge excitation depending on sensors.

Carrier type:High S/N ratio and excellent stability
DC type:High frequency response and excellent linearity

Selection of Dynamic Strainmeters

Number of channels, frequency response and bridge excitation

Digital type
Product Measuring points
 (Synchronization) 
Design Frequency response Bridge excitation
Multi-channel Dynamic Strainmeter 
DS-50A
50
(20)
on-line measurement
Bridge box is built in
DC - 100Hz *1 DC type
2V
*1 : The sampling speed is added 1ms with connecting each one set.
Digital Dynamic Strainmeter
DRA-162B
16
(16)
on-line measurement DC - 2.5 kHz Carrier type
0.5/2 Vrms
Smart Dynamic Strain Recorder
DC-204R
4
(8)
CF card record DC - 10 kHz DC type
0.5/2 V
Smart Dynamic Strain Recorder
DC-204Ra
4
(8)
CF card record
analog output
DC - 10 kHz DC type
0.5/2 V
PC control Dynamic Strainmeter
DC-004P
4、2 PC control type DC - 2kHz DC type
0.5/2V
Handheld Dynamic Strainmeter
DH-14A
4 Battery-operated
Handheld type
DC - 1kHz DC type
0.5/2V
Multi-Recorder
TMR-300
Max. 80
By unit selection
SD card record
with according to choice of input units
DC - 10kHz
 
DC type
0.5/2 V*2
Multi-Recorder
TMR-200
Max. 80
By unit selection
CF card record
with according to choice of input units
DC - 10kHz DC type
0.5/2 V
DC - 2.5kHz Carrier type
0.5/2 Vrms
*2 : By unit selection.
Analog type
Product Measuring points Design Frequency response Bridge excitation
Dynamic Strainmeter
DA-18A
1 Onboard digital monitor
Digital sensitivity setting
Multi-channel compatible
DC - 2.5kHz Carrier type
0.5/2 Vrms
Dynamic Strainmeter
DA-38A
1 Onboard digital monitor
Digital sensitivity setting
Multi-channel compatible
DC - 10 kHz Carrier type
0.5/2 Vrms
Dynamic Strainmeter
DA-17A
1 Onboard digital monitor
Multi-channel compatible
DC - 2.5kHz Carrier type
0.5/2 Vrms
Dynamic Strainmeter
DA-37A
1 Onboard digital monitor
Multi-channel compatible
DC - 10 kHz Carrier type
0.5/2 Vrms
Dynamic Strainmeter
DC-96A
1 Electronic autobalancing
Multi-channel compatible
DC - 200 kHz DC type
0.5/1/2/5/10 V
Dynamic Strainmeter
DC-97A
1 Electronic autobalancing
Multi-channel compatible
DC - 500 kHz DC type
0.5/1/2/5/10 V

Interface and other features

Digital type
Product Interface Features
Multi-channel Dynamic Strainmeter 
DS-50A
LAN
(100BASE-TX)
Max. 1000 channels
Strain, voltage units mixable
Digital Dynamic Strainmeter
DRA-162B
LAN
(100BASE-TX)
D/A converted output data processing, Voltage measurement
Smart Dynamic Strain Recorder
DC-204R
USB Simultaneous sampling (max. 32 channels), Recording on CF card
Smart Dynamic Strain Recorder
DC-204Ra
USB Simultaneous sampling (max. 32 channels), Recording on CF card
PC control Dynamic Strainmeter
DC-004P
USB Simultaneous sampling (max. 4 channels), 
Direct recording on a PC
Multi-Recorder
TMR-300
USB, LAN,
Wireless LAN
Combination of various input units
High-resolution mode
Multi-Recorder
TMR-200
USB, LAN Combination of various input units