MultiDO 5400 - Measuring instrument YSI - Free user manual and instructions
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| Product Type | Portable multiparameter water quality meter |
| Brand | YSI |
| Model | MultiDO 5400 |
| Application | Field and laboratory measurement of dissolved oxygen and temperature |
| Dimensions | Approximately 220 x 100 x 60 mm |
| Weight | Approximately 0.7 kg (without probes) |
| Power Supply | 4 C-size alkaline batteries or optional rechargeable battery pack |
| Display | Backlit LCD with high-resolution readout |
| Data Storage | On-board memory for up to 500 data points |
| Measurement Parameters | Dissolved oxygen (mg/L), percent saturation, and temperature |
| Sensor Technology | Polarographic or optical DO sensor (configurable) |
| Calibration | Single-point and two-point calibration with automatic temperature compensation |
| Temperature Range | -5 to 45 °C |
| Waterproof Rating | IP67 water-resistant casing |
| Connectivity | USB and RS-232 ports for data transfer to a PC |
| Maintenance | Regular cleaning of the sensor, replacement of membrane and electrolyte for polarographic probes |
| Safety Features | Automatic shut-off to conserve battery; slip-resistant housing |
| Spare Parts Availability | Sensor caps, membranes, electrolyte solution, O-rings, and cable assemblies |
| Repairability | Field-replaceable probes and cables; modular design for easy service |
| Regulatory Compliance | CE and RoHS compliant |
| Warranty | Typically 1-year limited warranty on the meter and probes |
Frequently Asked Questions - MultiDO 5400 YSI
How often should I calibrate the dissolved oxygen sensor on the MultiDO 5400?
Calibration frequency depends on usage. For routine field use, calibrate the dissolved oxygen sensor before each day of sampling or at least once a week. If accurate low-level measurements are required, perform a two-point calibration using zero oxygen solution and water-saturated air.
Can I use the YSI MultiDO 5400 in saltwater and freshwater?
Yes, the MultiDO 5400 is designed for both saltwater and freshwater applications. The DO sensor compensates for salinity automatically when you enter the correct salinity value during setup.
What is the recommended storage condition for the DO sensor between uses?
Store the sensor with a moist sponge in the calibration chamber or with the protective cap filled with clean water. Keep the sensor away from direct sunlight and extreme temperatures. For optical sensors, store the cap dry but clean.
How do I replace the membrane on a polarographic DO sensor?
To replace the membrane, unscrew the sensor cap, discard the old membrane, and rinse the sensor with clean water. Add fresh electrolyte solution to the cap, then snap the new membrane over the cap. Ensure no bubbles are trapped before screwing the cap back on.
Does the MultiDO 5400 come with a carrying case?
Most retail packages include a hard carrying case with foam inserts for the meter, probes, calibration solutions, and cables. This protects the instrument during transport and storage.
How long does the battery last on a full charge?
With four C-size alkaline batteries, the MultiDO 5400 can operate for approximately 200 hours of continuous use. Rechargeable battery packs typically last about 100 hours per charge. Battery life may vary with backlight usage and sensor type.
Can I download measured data to a computer?
Yes, the USB port and RS-232 interface allow you to transfer stored data to a PC using YSI's software or a third-party terminal program. Data can be exported as CSV files for spreadsheet analysis.
What is the warranty period for the YSI MultiDO 5400?
YSI provides a one-year limited warranty on the meter and probes from the date of purchase. The warranty covers defects in materials and workmanship under normal use. Extended warranties are available in some regions.
Is the MultiDO 5400 compatible with other YSI sensors such as the Pro Plus line?
The MultiDO 5400 uses a dedicated multi-pin connector and is primarily compatible with its own series of DO probes and cables. It is not designed to be interchangeable with Pro Plus sensors without the appropriate adapter, which is not offered.
How do I clean the temperature sensor?
Clean the temperature sensor with a soft cloth and mild detergent. Avoid abrasive materials and solvents. Rinse with clean water after cleaning and dry gently. Regular cleaning ensures accurate temperature readings and prevents sensor fouling.
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USER MANUAL MultiDO 5400 YSI
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Product information
Brand : YSI
Model : MultiDO 5400
Category : Measuring instrument