ProOBOD - Portable device YSI - Free user manual and instructions
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| Product Type | Portable Optical Dissolved Oxygen Meter |
| Brand | YSI |
| Model | ProOBOD |
| Measurement Principle | Optical (luminescent) sensor |
| Dissolved Oxygen Range | 0 to 50 mg/L |
| DO Accuracy | ±0.1 mg/L (0–8 mg/L), ±0.2 mg/L (8–20 mg/L) |
| Temperature Range | -5 to 45 °C |
| Temperature Accuracy | ±0.2 °C |
| Salinity Compensation | Automatic, 0–70 ppt |
| Barometric Pressure Compensation | Automatic, with built-in barometer |
| Display | Backlit LCD, 128 x 64 pixels |
| Data Storage | Up to 1000 data points (manual or interval logging) |
| Power Supply | 4 AA alkaline batteries (user-replaceable) or rechargeable NiMH |
| Battery Life | Approximately 80 hours (alkaline) |
| Dimensions (L x W x H) | 8.3 x 4.1 x 2.4 in (21.0 x 10.4 x 6.1 cm) |
| Weight | 1.2 lb (0.54 kg) with batteries |
| Waterproof Rating | IP-67 (submersible to 1 m for 30 min) |
| Operating Temperature | -10 to 50 °C |
| Storage Temperature | -20 to 60 °C |
| Sensor Cap Life | Typically 12–18 months (user-replaceable) |
| Calibration | 1-point or 2-point in air or water |
| Warranty | 3 years for instrument, 1 year for sensor cap |
Frequently Asked Questions - ProOBOD YSI
How do I calibrate the ProOBOD?
Calibrate in water-saturated air using the included calibration sleeve. Follow the on-screen prompts for a 1-point or 2-point calibration. Ensure the sensor cap is clean and dry before calibration.
How often should I replace the sensor cap?
The sensor cap typically lasts 12–18 months depending on usage and storage conditions. Replace when readings become unstable or calibration fails.
Can the ProOBOD be used in saltwater?
Yes, the meter automatically compensates for salinity from 0 to 70 ppt, making it suitable for freshwater, brackish, and seawater applications.
What type of batteries does it use?
It uses 4 AA alkaline batteries. You can also use rechargeable NiMH AA batteries, but battery life may vary.
How do I clean the optical sensor?
Gently wipe the sensor window with a soft, lint-free cloth. For stubborn deposits, use a mild detergent and rinse with deionized water. Do not scratch the window.
Is the ProOBOD waterproof?
Yes, it has an IP-67 rating, meaning it is dust-tight and can be submerged in up to 1 meter of water for 30 minutes.
How do I download data from the meter?
Use the optional USB cable and YSI software (e.g., KorDSS) to transfer logged data to a computer. The meter also supports real-time data output via RS-232.
What is the storage temperature range?
Store the instrument at -20 to 60 °C (-4 to 140 °F). Remove batteries if storing for extended periods.
Can I replace the batteries myself?
Yes, the battery compartment is easily accessible. Unscrew the two captive screws on the back, remove the cover, and replace with 4 AA batteries. Ensure correct polarity.
Why is my DO reading fluctuating?
Fluctuations can be caused by air bubbles on the sensor cap, rapid temperature changes, or a fouled sensor. Clean the cap, ensure proper immersion, and allow time for stabilization.
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USER MANUAL ProOBOD YSI
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Product information
Brand : YSI
Model : ProOBOD
Category : Portable device