Delta-T HH2 - Under-Range

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Technical Reference



Under-range

The sampled voltage value was lower than the HH2 can handle, or the resultant soil

moisture value was calculated to be negative. As soil moisture is a ratio, this is

reported as too low.

Main Page

ML3 Sensor Readings3
To Select the ML3 for the Next Reading3
Temperature Readings Are Not Supported3
Trouble Shooting4
My Ml2X and ML3 Don’t Agree4
How to Upgrade Your HH24
Which Version Do I Have?4
SM300 Sensor Readings6
To Select the SM300 for the Next Reading6
Upgrade Options7
SM150 Sensor Readings8
To Select the SM150 for the Next Reading8
Table of Contents10
Quick Start11
Introduction to the Moisture Meter12
- Description12
- Connectors12
- Unpacking13
- Moisture Meter Parts14
- How the Moisture Meter Takes Readings15
- Analogue Sensors (SM200, ML1, ML2, Ml2X, EQ2, PR2, PR1)15
- Sleep and Waking the Meter15
- Averaging15
Navigating Options and Readings16
- Options Menu16
- Using the Options Menu18
- Example: Change the Plot Label19
- To Set the Clock from the Keypad19
- Setting the Clock19
- Options Are Device Specific20
- Upload Data to PC20
- Summary21
- How to Average Readings21
- What You Need to Know about Averaging22
- About SM200 and Thetaprobes24
SM200 and Thetaprobes24
- Device26
- Options26
- Data27
- Plot ID27
- Root Depth27
- Sensor Depth27
- Soil Set-Up28
- Soil Type28
- Display Units Options29
- Field Capacity29
- Date and Time30
- Remote30
- Status30
- SM200 and Thetaprobe Options Summary31
- Before Taking Readings32
- Reading the Sensor32
- To Take Readings32
- Memory Full?33
- About Profile Probes34
- Profile Probes34
  - Soil Set-Up (First Menu)38
  - Soil Type (First Menu)38
  - Soil Type (Sub-Menu)38
  - Soil Set-Up (Sub-Menu)39
  - Display40
  - Set the Clock41
  - Profile Probe Options Summary42
  - Reading the Profile Probe43
- WET Sensor46
  - Install WET Sensor Calibration48
  - Data Menu49
  - Units51
  - Compensation52
  - Percent52
  - Temperature52
  - WET Options Summary54
  - Reading the WET Sensor55
- Equitensiometers58
- Reading the Equitensiometer63
- How Many Readings Can I Take?65
- Optimising Memory65
Memory Use65
- How Do I Erase Readings?66
- What Happens When the Meter Runs out of Memory?66
PC Software - Hh2Read67
- Connect PC to HH268
- Test the Connection68
- Available Memory70
- Hh2Read Menus70
- View Menu70
- Clock71
- Settings Menu71
- Retrieve Menu and Button72
- Tools Menu73
- Help Menu74
- Install, Sensor Calibration74
- Dataset Import Wizard75
CSV Data File Layout77
- Data File : Part 1 - Header78
- Layout of Profile Probe Readings80
- About Soil Parameters A0 & A181
- Using Default Values of A0 & A182
- .LIN File Format83
Linearisation Tables Format83
- Example Linearisation Table84
- Changing the Battery85
  - To Replace the Battery86
  - The Battery Display87
Care and Maintenance88
Specifications89
Technical Reference89
- Maximum Number of Readings90
- Memory90
- 25-Way D-Connector91
- 25-Way D-Connector Pin Arrangement91
- PC Communications Problems93
- To Cold Boot the HH293
- Troubleshooting93
Warranty and Service103
- Technical Support104
- Accessories105
- Field Water Capacity110
- Wilting Point110
Water Deficit Explained110
- Water Deficit Calculation for Thetaprobes111
- Water Deficit111
- Available Water Capacity111
- Water Deficit Calculation for Profile Probes112
- Standard Soil Types113
Field Water Capacity Values113
- Identifying Soil Types114
- Calculating Field Capacity115
- Field Measurements115
- Laboratory Methods116
- Available Field Water Capacity117
- Finding the Refill Point118
Glossary119
Index122

Delta-T HH2 - Under-Range

Table of Contents