Why H2O2 or humidity reading doesn't change for less than 5 minutes on Vaisala Measuring Instruments?
If the H2O2 or humidity reading does not change during regular use for less than 5 minutes on Vaisala Measuring Instruments, it may be because a purge is being performed, which lasts for 4 minutes. No action is required.
Why is start-up purge not performed in analog mode in Vaisala HPP272 Measuring Instruments?
If the start-up purge is not performed in analog mode on Vaisala Measuring Instruments, check pin #5 to ensure the probe is not in digital mode at start-up.
Why is the response time slower than specified in Vaisala HPP272 Measuring Instruments?
The slower than expected response time in Vaisala Measuring Instruments can be due to several reasons. The filter might be blocked, in which case you should change it, being careful not to touch the sensors when the filter is off the probe. If the probe has fallen and the filter hit the floor, remove the filter and visually inspect the sensors. If they are intact, replace the filter as the porous material may have become less permeable. If the sensors are damaged, contact Vaisala technical support. Also, exposure to unsuitable chemicals like DMSO can slow response time, so replace the filter and perform a chemical purge. Lastly, check if the measurement filtering factor is configured too slow; use Vaisala Insight software, Modbus configuration register 030Ahex, or an Indigo 200 transmitter...
Lists the key features, measurement capabilities, and connectivity options of the probe.
Outlines crucial safety warnings and precautions for handling and using the probe.
Lists all parameters that the HPP272 probe can measure, with units.
Explains the PEROXCAP sensor technology for measuring H2O2 vapor concentration.
Details the probe's M12/5 pinout, wire colors, and connection requirements.
Specifies the operating voltage range and maximum current consumption for the probe.
Instructions on how to select the probe's output mode using pin #5.
Explains the probe's reaction and requirements when exposed to H2O2 condensation.
Step-by-step guide for connecting the probe to the Vaisala Insight software.
Details how to enable and access the probe's wireless configuration interface.
Explains user levels and the process for logging into the wireless configuration interface.
Provides instructions and precautions for cleaning the probe body and cable.
Guides users through common operational issues and their potential resolutions.
Describes the conditions that cause the analog output to enter a defined error state.
Lists Modbus registers for reading measurement data values.
Lists Modbus registers used for configuring the probe's settings.
Provides examples of Modbus requests and responses for reading and writing data.
General| Measurement Parameters | Humidity, Temperature, Pressure |
|---|---|
| Humidity Measurement Range | 0 ... 100 %RH |
| Protection Class | IP65 |
| Temperature Measurement Range | -40 to +60 °C |
| Output | RS-485 |
| Power Supply | 10...30 VDC |
| Operating Temperature Range | -40 to +60 °C |
| Humidity Sensor | Vaisala HUMICAP® |
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