Rixen MTR-731 User manual
Soil Moisture Transmitter MTR-730 Series
User’s Guide
A. Specifications
Model No.
MTR-731
MTR-732
Measuring Range
Moisture:
0.0 ~ 100.0% output scale
True read: 6.0~56.0% WME
Moisture:
0.0 ~ 100.0% output scale
True read: 6.0~56.0% WME
Temperature:
-40 ~ +60C
Accuracy (At 25C)
Reference of Mineral Soils
Moisture: 2%
Temperature: ±0.4℃
Moisture: 2%
Long-term Stability
Better than 1% per year (Typical)
Temp. Compensation
0.02% / C (Effect @ 0% RH)
Response
Approx. 3 seconds
Output
Moisture scale: 0~100%
Temp. scale: -40~+60℃
Current output: 4~20mATwo wire
Temperature:
Current output: 4~20mATwo wire
Moisture:
Current output: 4~20mATwo wire
Supply Voltage
12 ~ 40V DC, >150mA
Ambient Temperature
-40 ~ +60C
Housing/Protection
ABS plastic watertight enclosure (IP 65), Probe: SUS304 or SUS316
Weight
Approx. 190g
Dimensions
Instrument: φ90×54(H) mm
Probe: φ8×150(L)mm
※Specifications are subject to change without notice.
B. Ordering Information C. External Dimensions
Model
Descriptions
MTR-731
Soil Moisture transmitter
MTR-732
Soil Moisture & Temperature transmitter
※Standard specification of probe: φ8×150mm
※Length of probe is available upon request
Max. L=1500mm
D. On-Site Calibration & Wiring
1. Wiring
2. PCB
2.1 MTR-731Soil Moisture transmitter
2.2 MTR-732Soil Moisture & Temperature transmitter
3. Three ranges selectable:
Range 1: Dryer or high density material.
Range 2: Medium-density water in the material.
Range 3: Wet or low density material.
4. Calibration
ZERO
SPAN
Temperature (Upper PCB)
VR3
VR4
Moisture (Underneath PCB)
VR1
VR2
MTR73015FEB04
Temperature (Upper PCB) Moisture (Underneath PCB)
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