OTT Hydrolab MS5 - User Manual

Questions and Answers

S
Sandra GreenAug 15, 2025
What to do if PC or communication software of OTT Hydrolab MS5 is not functioning correctly?
- L
  Larry BautistaAug 15, 2025
  If your PC or terminal emulation or communication software isn't working right, try these steps: * Start the communications software before connecting the instrument. * Make sure the PC is on and the communication software is running. * Check that you've selected the correct communication port (COM 1, 2, 3, 4). * Confirm the terminal is set to ANSI terminal emulation, and the baud rate is correct (19200, 8, N, 1). * If using a long cable (100 meters or more) with the Surveyor, set the terminal and Sonde baud rates to 9600.
P
Pamela GarciaAug 18, 2025
What to do if communication is not established after several attempts with OTT Hydrolab MS5 Transmitter?
- F
  Frank GordonAug 18, 2025
  If you're having trouble establishing communication, here are a few things to check: * First, make sure the instrument is powered on and working. * Then, check the power cables and connections to ensure they are properly connected to the wall outlet or external battery, if you're using one. * Also, verify that the input voltage to the multiprobe is between 7V and 18V. * If your multiprobe has an internal battery pack, check the batteries' polarity and voltages.
B
Brittany FloydAug 21, 2025
Why OTT Hydrolab MS5 gives wrong Conductivity, Temperature, and/or Depth readings?
- A
  Amanda AlvaradoAug 21, 2025
  Incorrect readings for Conductivity, Temperature, or Depth can often be resolved by ensuring that the sensors are properly maintained and calibrated. Also, verify that the units displayed are accurate (e.g., for Depth: meters, feet, or psi).
K
kristinebryanAug 25, 2025
What to do if power cables and connections of OTT Hydrolab MS5 have issues?
- A
  Amanda ChenAug 25, 2025
  If you're experiencing power cable and connection issues, verify that the PC and multiprobe are properly connected to the wall power outlet or an external battery, if being used. Also, check that the input voltage to the multiprobe is between 10 and 15 volts. If applicable, make sure the battery pack is correctly installed and verify the battery polarity and voltages.
M
Melissa MullenAug 27, 2025
What to do if OTT Hydrolab MS5 gives incorrect D.O. readings?
- L
  Laurie CookAug 27, 2025
  If you're getting incorrect D.O. readings, make sure the D.O. sensor has been properly maintained and calibrated.
J
Jennifer NelsonAug 30, 2025
What to do if Hydras 3LT does not automatically detect the Sonde when launched?
- M
  Michelle PatelAug 30, 2025
  If the Hydras 3LT isn't automatically detecting the Sonde when launched, press the RE-SCAN FOR SONDES button.
S
shannon27Sep 2, 2025
How to configure Hydras 3 LT Communication Settings for OTT Transmitter?
- J
  jeffrey73Sep 2, 2025
  To configure Hydras 3 LT Communication Settings, select File>Options from the Hydras 3 LT Connection Screen. If you know the Sondes/PC baud rate and COM port, disable the COM Port and baud rate auto scans and set Hydras3LT to use the known values.
S
Sarah BeardSep 5, 2025
What to do if OTT Hydrolab MS5 has a connection timeout issue?
- M
  mmeadowsSep 5, 2025
  If you're experiencing a connection timeout issue, the connection timeout may be extended from 10 to 15 seconds, which will allow time for additional retries.
A
Amanda WattsSep 8, 2025
What to do if there are internal components issue with OTT Hydrolab MS5?
- B
  bakerantonioSep 8, 2025
  If you suspect an issue with the internal components, make sure all internal connections are securely seated. Check for any water inside the unit; if damp, dry it thoroughly with a lint-free cloth or let it air dry in a dry room overnight. Identify and repair the source of the leak. If these steps don't solve the problem, try substituting other instruments, cables, and terminals to find the failing component.
J
Julie SampsonSep 12, 2025
Why OTT Hydrolab MS5 Transmitter gives Low D.O. readings or extreme pH/Redox levels?
- C
  Cynthia JensenSep 12, 2025
  If you're getting low D.O. readings or extreme pH/Redox levels, check the value of the sample solution and ensure the sensors are properly maintained.

Summary

Section 1 Specifications

Section 2 General Information

Safety Information

Provides safety instructions and explains hazard signal words used in the manual.

Section 3 Installation

Instrument Assembly and Power Options

Details connecting the multiprobe to a display/PC and available power sources.

Section 4 Operation

Sensor Calibration

Section 5 Deployment

Section 6 Maintenance

Battery Replacement

Step-by-step guides for replacing batteries in DS5, DS5X, and MS5 multiprobes.

Sensor Maintenance

Procedures for maintaining specific sensors like DO, pH, ORP, and conductivity.

Section 7 Replacement Parts and Accessories

Section 9 Repair Service

Appendix A Troubleshooting

Troubleshooting Communications

Guides on resolving communication issues with Hydras 3LT and connection problems.

Troubleshooting Sensor Issues

Lists common sensor problems and provides solutions for incorrect readings.

Appendix B External Communications

Appendix C Using HyperTerminal

OTT Hydrolab MS5 Specifications

General

Operating Temperature	-5 to +50 °C
Resolution Water Level	0.001 m
Measurement Range Temperature	-5 to +50 °C
Accuracy Temperature	±0.1 °C
Resolution Temperature	0.01 °C
Measurement Range Conductivity	0 - 200 mS/cm
Accuracy Conductivity	±1% of reading
Resolution Conductivity	0.001 mS/cm
Protection Class	IP68
Weight	Approx. 1.5 kg
Measurement Parameters	Temperature, Conductivity
Communication	SDI-12, RS-485, Modbus
Measurement Range Water Level	0 to 10 m
Material	POM
Accuracy Water Level	±0.05% of full scale

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