RMH-310A Digital Strain Recorder

RMH-310A Digital Strain Recorder

This is a low-power data recorder powered by batteries. This makes it suitable for unmanned long-term measurement in places where power is not available, such as remote areas, mountainous regions, and areas with heavy snowfall. It can be connected to strain gage civil engineering sensors, civil engineering sensors equipped with temperature measuring function, and thermocouples, allowing for 10 channels of measurement. It also has operation and display sections, allowing for operations related to setting of measuring conditions and performing measurements. Channels: 10/unit

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Description

Features

  • Ideal for unmanned long-term measurement in places where power is not available
  • Equipped with a display for confirming settings and measurement values
  • Easy data collection via USB flash drive
  • Key operation without control software
  • Capable of measuring thermocouples (K, T)

Specifications

Channels
10
Measuring Targets
Strain-gage civil engineering transducers
Civil engineering transducer with a thermal sensor
Strain-gage transducers
Thermocouples (Types K and T)
Compatible Bridge Resistance
350 Ω (Full-bridge system)
Cable Length
Max. 2.0 km (4-conductor (0.5 mm2) shielded cable)
Gage Factor
2.00 fixed
Bridge Current
Approx. 2.19 mA DC (Constant current)
Measuring Range
Strain ±20000 μm/m
Temperature (Civil engineering transducer with a
thermal sensor) -30.0 to 70.0℃
Temperature (Thermocouple)
K: -200 to 1200℃, T: -200 to 350℃
Accuracy
Strain ±0.1% FS
Temperature (Civil engineering transducer with a thermal sensor) ±0.5℃
Temperature (Thermocouple) ±(0.1% rdg ＋1.0) °C
Internal point-of-contact compensator: Within ±2.0℃
(At the time of an input terminal temperature balance)
*The accuracy of an internal reference point-of-contact compensator and accuracy of a thermocouple are not included in measurement accuracy.
Temperature Stability
Strain
Zero point Within ±1 ×10-6 strain/℃
Sensitivity Within ±0.02%/℃
Temperature (Civil engineering transducer with a thermal sensor)
Zero point Within ±0.025% FS/℃
Sensitivity Within ±0.04%/℃
Temperature (Thermocouple)
Zero point Within ±0.025% FS/℃
Sensitivity Within ±0.04%/℃
Measuring Time
Within 40 s/10 channels (Scanning)
Temperature Measurement Current
0.24 mA DC (Constant current)
Data Storage
32000 times/channel
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)
Check Function
Sensor check (Parallel resistance method and during strain measurement)
Battery voltage
Memory check
Display
LCD (20 digits × 4 lines, with no back light)
Display Functions
The contents of the data below are displayed on LCD.
Measurement state, current time, data acquisition, real-time monitor, measurement start, measurement stop, condition setting, self-check, date setting, backup data collection, and version display
Operation
Arrow keys, ON/OFF, SET, ESC
Interface
USB 2.0 (Only saved in USB flash drive)
Power Supply
6 to 15 VDC, optional battery pack
Current Consumption
During operation: 100 mA or less
Standby status: 100 μA at 6 VDC
Input Specifications
M3 terminals for both solder and screw
Number of Measurement Times
7000 times or more (When measuring at intervals of 10 minutes at 23ºC using the optional RB-10A battery pack [10 Ah])
Operating Temperature
–20 to 50ºC (Varies depending on the operating temperature when using USB flash drive)
Operating Humidity
10 to 95%
Operating Environment
Dust or the inductive noise of a bulk motor must not be present.
Dimensions
170 W × 230 H × 60 D mm (Excluding protrusions)
Weight
2 kg or less (Excluding the battery)
Others
Lightning surge protector provided (SD4-75)
Standard Accessories
Battery cable (For battery pack other than RB-10A)
USB flash drive for data collection
(Industrial temperature range extended model)
*Supplementary tool (for converting data format and creating measuring conditions), instruction manual, specifications, outline drawings are saved in the provided USB flash drive.
Optional Accessories
Battery Pack RB-5A (5 Ah), RB-10A (10 Ah)

Dimensions