DANOPLUS DP-355 Quantum PAR Meter Instruction Manual

1. Introduction

The DANOPLUS DP-355 Quantum PAR Meter is designed for measuring Photosynthetically Active Radiation (PAR) within the photosynthetic waveband. This meter provides accurate and reliable readings of light energy available for photosynthesis, crucial for monitoring plant growth in various environments.

The measurement range of the DP-355 is between 0 and 5000 µmol/m²/sec. It specifically measures light in the 400 nm to 700 nm wavelength range, with a tolerance of ±10 nm at both the cut-on and cut-off wavelengths. This ensures that the meter captures the light spectrum most relevant to plant photosynthesis.

2. Key Features

• Reliable Measurement: Measures PAR from 0 to 5000 µmol/m²/sec within the 400-700 nm photosynthetic waveband, ensuring high precision for plant light requirements.
• Record Function: Stores up to 100 measured values, allowing for tracking and review of PAR changes over time. Features a real-time display of the last four recorded data points for quick reference.
• Versatile Usage: An essential tool for growers, scientists, and researchers to optimize plant growth, improve energy efficiency, and enhance crop management.
• Tripod Socket: Includes a tripod socket for secure and stable attachment to a tripod (not included), providing flexibility and accuracy during measurements.
• Portable Design: Compact, lightweight, and ergonomic, making it easy to carry and use in various locations such as greenhouses, growth chambers, or fields.

Figure 2.1: Overview of DANOPLUS DP-355 Quantum PAR Meter features including Max/Min/Avg, High Accuracy, Auto-power off, Fast Response, Large measurement range, Compact size, 100 Data log, and Data Hold.

Figure 2.2: The DP-355 PAR Meter is suitable for wide applications such as crop growth monitoring, greenhouse control, plant factories, and seed cultivation.

3. Product Components and Overview

Familiarize yourself with the various parts of your DANOPLUS DP-355 Quantum PAR Meter.

Figure 3.1: Front and back view of the DP-355 PAR Meter, highlighting the Sensor diffuser, Power Key, LCD display, Hold key, Down key, Mode key, Up key, Battery compartment, Battery cover, and Tripod socket.

Figure 3.2: Detailed view of the large screen display, indicating the Menu or MAX/MIN/AVE data, Battery indicator, Hold display, Measuring unit, Measured value, and the last 4 records.

4. Setup

4.1 Battery Installation

1. Locate the battery compartment on the back of the meter (refer to Figure 3.1).
2. Slide open the battery cover.
3. Insert the required Alkaline batteries, ensuring correct polarity (+/-). The meter requires batteries to operate.
4. Close the battery cover securely.

4.2 Powering On/Off

• To power on the device, press the POWER key.
• To power off the device, press and hold the POWER key until the display turns off. The meter also features an auto-power off function to conserve battery life.

4.3 Tripod Mounting (Optional)

For stable and consistent measurements, especially over time or in specific locations, the meter can be mounted on a tripod.

1. Locate the tripod socket on the back of the meter (refer to Figure 3.1).
2. Screw the meter onto a standard tripod (tripod not included).
3. Adjust the tripod to the desired height and angle for measurement.

Figure 4.1: The DP-355 PAR Meter shown with a tripod mount for stable measurements. Note: Tripod is not included.

5. Operating Instructions

5.1 Taking a Measurement

1. Ensure the meter is powered on.
2. Position the sensor diffuser directly under the light source at the desired measurement point.
3. The current PAR value will be displayed on the LCD screen in µmol/m²/sec.

Figure 5.1: Using the DP-355 PAR Meter to measure light intensity in a plant cultivation setup.

5.2 Using the Record Function

The meter can store up to 100 measurements and display the last four readings.

• To save a measurement, press the A/LOG button. The current reading will be stored.
• To view stored data, navigate through the menu using the MODE button and arrow keys.
• The display will show the last four recorded data points in real-time, allowing for quick monitoring of recent changes.

5.3 Data Hold Function

To freeze the current reading on the display:

• Press the HOLD button. The displayed value will be held.
• Press the HOLD button again to release and resume live measurements.

5.4 Advanced Measurement with External Devices

The DP-355 can be used in conjunction with external applications for more detailed analysis, such as calculating Daily Light Integral (DLI) or mapping PAR distribution.

6. Maintenance

6.1 Cleaning

• Keep the sensor diffuser clean and free from dust or debris. Use a soft, dry cloth to gently wipe the sensor.
• Clean the meter's body with a slightly damp cloth. Do not use abrasive cleaners or solvents.

6.2 Storage

• When not in use for extended periods, remove the batteries to prevent leakage.
• Store the meter in its carrying pouch in a cool, dry place, away from direct sunlight and extreme temperatures.

7. Troubleshooting

• Meter does not power on: Check battery installation and ensure batteries are not depleted. Replace if necessary.
• Inaccurate readings: Ensure the sensor diffuser is clean and unobstructed. Verify the meter is positioned correctly relative to the light source.
• Display issues: If the display is dim or flickering, replace the batteries.
• Data not saving: Ensure the A/LOG button is pressed firmly. Check if the memory is full (though it stores up to 100 values).

8. Specifications

9. Warranty and Support

For warranty information and technical support, please refer to the documentation included with your product or contact DANOPLUS customer service through their official website or the retailer from whom the product was purchased. Keep your purchase receipt as proof of purchase for warranty claims.