Digital Strain Recorder


· Suitable for long-term measurement in the absence of personnel under the environment without external power supply
· Compact & lightweight 1-channel model
· Equipped with a display used to confirm setting conditions and measured values
· Easy to collect data via USB memory


The RMH-301B is a battery-powered data collection device with low power consumption, suitable for long-tem measurement in the absence of personnel at the places without external power supply such as long-distance mountainous and heavy-snowfall area.

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Digital Strain Recorder


Channel 1
Applicable Transducer Strain-gage transducers
Strain gage civil engineering transducers
Civil engineering transducer with a thermal sensor
Applicable Bridge Resistance 350 Ω (Full-bridge system)
Cable Length Max. 2.0 km (4-conductor (0.5 mm2) shielded cable)
Gage Factor Fixed 2.00
Bridge Current Approx. 2.19 mA DC (Constant current)
Temperature Measurement Current Approx. 0.24 mA DC (Constant current)
Measuring Range Strain: ±20000 ×10-6 strain
Temperature: -30.0 to 70.0°C
Resolution Strain: 1 ×10-6 strain
Temperature: 0.1°C
Measuring Accuracy Strain: ±0.1%FS
Temperature: ±0.5°C
Data Storage Strain: 30720 times
Temperature: 30720 times
Strain + temperature: 20475 times
Clock Year (2 digits of the Gregorian calendar), month, date, hour, and minute
Measuring Interval 1 to 59 minutes (1 minute/step)
1 to 99 hours (1 hour/step)
Display LCD (16 digits×2 lines)
Operation Arrow keys, ON/OFF, SET, ESC
Interface USB1.1*
Power Supply 6 to 15 VDC, optional battery pack
Current Consumption During operation: 100 mA or less
Standby status: 100 μA or less
Input Specifications Bolt (M3)
Applicable press-fitted terminal: RAV, 1.25-3 or equivalent
Operating Temperature -20 to 50°C (0 to 50°C for data collection)
Operating Humidity 10 to 95% RH
Operating Environment Dust or the inductive noise of a bulk motor must not be present.
Dimensions 112 W × 28 H × 66.5 D mm (Excluding protrusions)
Weight Approx. 180 g
Standard Accessories Instruction manual (CD-R)
Optional Accessories USB cable N-38 (1 m), N-39 (2 m)
Battery Pack RB-5A (5 Ah), RB-10A (10 Ah)
Control Software RMH-390A


Control Software


Control Software Optional
Setting Function Setting of data collection conditions (Measuring name, measuring point number, final measuring channel)
Setting of channel conditions (Transducer name, measuring point mode, initial value, calibration factor and unit)
Collection Function Measurement start (Measurement start time, interval measurement time and measurement times)
Measurement stop
Data collection (USB)
(Measuring data is automatically saved as data collection pass)
USB Storage Function Entering measuring conditions
Data collection
Data Display Initial data display/physical quantity display
Value display (Display channel and display period setting)
Time series chart display (Max. 3 charts, display channel, display period setting, line type and color selection, automatic and calibration)
Print (Printer printing documents)
Data Editing Measured data editing (Editing of title and data parts)
Data Conversion Converted to ASCⅡ format
Check Function Self-diagnosis of measurer (Inspection of A/D converter, cell voltage, transducer and ROM/RAM)
Test measurement
Real-time monitoring
Other Address book setting, communications condition setting, time setting and help function
Operating Environment
OS Windows Vista® (32 bits, Japanese version)
Interfaces USB Interface (RMH-301B)
CD-ROM or DVD (For software installation)
CPU PentiumⅢ, 1 GHz or advanced
Memory Required RAM 512 MB or more
Hard Disk Hard disc capacity: 20 MB or more
(For installation, excluding that for data)
Spare capacity: 10 MB or more (Excluding that
for saving measuring data)
Graphic High resolution video (Super VGA):
800 × 600 or more
Adapter and monitor: 1024 ×768
Full-color or more

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