The Agratronix BHT-2™ is an advanced baler-mounted hay moisture tester designed to provide continuous moisture readings of hay as it is being formed into a bale within the bale chamber. This device helps farmers monitor hay moisture levels during baling to prevent issues like excessive heating and mold growth, which can occur if hay is baled or stored with too high a moisture content.

Function Description:

The BHT-2 operates by continuously testing hay moisture as it passes through the bale chamber. It displays the moisture readings every two seconds, allowing the operator to make real-time adjustments to baling practices. The device is equipped with two moisture sensor pads that are mounted inside the bale chamber, one on the left and one on the right side. These sensors detect the moisture content of the hay as it is compacted. The display module, mounted in the tractor cab, shows the current moisture percentage. The tester also features adjustable high and low moisture limits, which, when set, will trigger an audible alarm if the hay moisture falls outside the specified range. An offset feature allows the user to fine-tune readings to match other testing methods or specific hay conditions. The device is designed for use with both conventional square balers and round balers, with specific installation instructions for each type.

Important Technical Specifications:

While specific numerical technical specifications like measurement range or accuracy are not explicitly detailed in the provided pages, the manual highlights several functional aspects:

Power: The unit requires a positive (+) 12-volt power supply, either controlled by the tractor's ignition switch or a constant supply. It includes a 10' fused power cable with a 2 Amp fuse (automotive blade type) in a fuse holder.
Sensors: It utilizes two 35' shielded sensor cables and two moisture sensor kits with mounting hardware. The sensor pads are made of stainless steel contacts.
Display: The display module shows moisture readings and various settings. It has a backlight with adjustable brightness.
Connectivity: Includes a USB cable for potential software updates.
Measurement: Provides continuous moisture readings, updated every two seconds.
Adjustable Limits: High and low moisture limits can be set within a range of 9% to 30% in 1% increments.
Offset: Moisture readings can be offset by -10% to +10% in 0.5% increments.
Baler Type Selection: Allows selection between "Small square baler" and "Round baler" to optimize readings based on the baler type.

Usage Features:

Easy Installation: The manual provides detailed instructions and diagrams for installing the display module and moisture sensors, including drilling templates for precise placement.
Intuitive Interface: The display module features clearly labeled buttons for power (ON/OFF), mode selection, up/down arrows for adjustments, sound control, and calibration check.
Mode Selection: The "MODE" button allows users to cycle through and adjust settings for Moisture Offset, High Limit, Low Limit, and Baler Type. A blinking triangular indicator on the display shows the currently selected mode.
Adjustable Backlight: The display backlight brightness can be adjusted using the up/down arrow buttons for optimal visibility in various lighting conditions.
Calibration Check: A dedicated calibration check button (E) allows users to verify the unit's calibration. The display will show "CAL" for a correctly calibrated unit or "Err" if there's a problem.
Audible Alarm: When high or low moisture limits are set, the tester will beep if the hay moisture exceeds or falls below these limits, alerting the operator to potential issues.
Software Updates: The device supports software updates via a USB cable, ensuring it can be kept current with the latest improvements.
Baler Type Specificity: The ability to select the baler type (small square or round) helps ensure more accurate readings by accounting for differences in how hay is formed in various balers.

Maintenance Features:

Sensor Pad Replacement: The sensor pads and contacts can wear out over time and are replaceable. The manual directs users to contact Agratronix for replacement parts (SUBA-S0302) and refers back to installation instructions for replacement.
Cleaning: The stainless steel contacts on the moisture sensors should be kept clean for best results. Cleaning with fine steel wool, mineral spirits, or alcohol is recommended. Dirty contacts can lead to lower readings.
Storage: After each use or at the end of the harvest season, the display module should be removed (if not in a dry cab) and stored in a clean, dry place.
Cable Protection: Weatherproof plug covers on the sensor cables should always be used to prevent moisture and dirt from entering electrical contacts.
Hardware Check: All nuts and screws on the moisture sensor plates should be checked and tightened as necessary to ensure the sensor pad's leading edge is secured flat and tight to the bale chamber wall.
Troubleshooting Guide: The manual includes a troubleshooting section to help diagnose common issues such as the tester not powering on, failing to calibrate, or displaying erratic readings. It suggests checking connections, fuse, sensor pads, and ensuring the chamber is empty for calibration.

Important Considerations:

The manual emphasizes that sensor readings are affected by numerous variables (field conditions, hay varieties, harvest variables, bale density, preservatives, windrow variations) and should not be used as an absolute quantitative measurement. Instead, they are useful for baling and storing hay, helping operators develop a "feel" for acceptable moisture ranges. It also notes that baler-mounted testers may read a couple of percentage points higher than hand-held hay probe testers due to differences in hay density during measurement. Hay with moisture above 20% should not be baled or stored without a preservative, and hay above 25% should not be baled or stored at all, to prevent heating and mold.

agratronix BHT-2 - Install Moisture Sensors

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