Vaisala GMP252 User Manual (English)

Questions and Answers:

A
Ashley KlineAug 12, 2025
What to do if Vaisala Measuring Instruments wireless device connected to Indigo access point, but configuration interface doesn't launch?
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  Jeffrey WoodsAug 12, 2025
  If the configuration interface does not launch automatically after connecting to Indigo, open your browser application. Also, check your device's notifications for an authentication or login prompt for the Indigo connection. Acknowledge the connection and then open your browser application if the interface still doesn't launch automatically.
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Allen DunnAug 15, 2025
Why Vaisala Measuring Instruments Indigo access point does not show up in device's list of available WLAN connections?
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  Darlene EvansAug 16, 2025
  The Indigo access point might not appear in your device's WLAN list because it is not enabled or an error has occurred. Try switching the Indigo WLAN connection off, then enable it again. Alternatively, your device may be too far from the transmitter, or obstacles are blocking the signal. Move closer to the transmitter and refresh your device's access point list.
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John JordanAug 23, 2025
What to do if Vaisala Measuring Instruments CO measurement not working?
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  Jennifer WestAug 23, 2025
  If the CO measurement is not working, condensation may have formed on the sensor. Remove the filter and check for condensation. If present, dry it out with instrument air and insert a new dry filter. To prevent recurrence, keep the probe powered and operating.
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Michael LinAug 27, 2025
How to fix Vaisala Measuring Instruments probe outputs stars on serial line?
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  Timothy GrayAug 27, 2025
  If the probe outputs stars instead of measurement data, it could be due to an incorrect supply voltage. Check the power supply. Another possible cause is an unsuitable operating environment. Verify that the operating environment is within specified operating limits.
S
Spencer FoxAug 30, 2025
What to do if Vaisala Measuring Instruments Indigo does not respond when pressing the wireless connection activation button?
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  James MorrowAug 30, 2025
  If Indigo does not respond when pressing the wireless connection activation button, the WLAN functionality may have been disabled with the WLAN ON/OFF DIP switch on Indigo's circuit board. Enable WLAN functionality with the WLAN ON/OFF DIP switch.
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Kerry BrightSep 3, 2025
How to access Vaisala Measuring Instruments probe on the RS-485 line?
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  Abigail AlvarezSep 4, 2025
  If you are unable to access the probe on the RS-485 line, it may be due to incorrect wiring. Check that the RS-485 connection is wired correctly. Another possible cause is the probe being in POLL mode with an unknown address. Power cycle or reset the probe and try again.
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Thomas TaylorSep 7, 2025
Why Vaisala Measuring Instruments analog output reading is unchanging and appears incorrect?
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  Kristin HernandezSep 7, 2025
  The analog output reading may be unchanging and incorrect because the analog output is in an error state. Remove the cause of the error state to allow the analog output to recover its normal function.
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Kristen ReeseSep 10, 2025
What to do if Vaisala Measuring Instruments interface does not open in the browser?
- S
  Seth ThomasSep 12, 2025
  If the interface does not open in the browser, it may be due to issues with the browser loading the landing page. Try entering the default Indigo IP address http://192.168.1.1 in the browser's address bar.

Vaisala GMP252 Specifications

General

Resolution (Temperature)	0.01 °C
Measurement Range (Humidity)	0 to 100 %RH
Protection Class	IP65
Measurement Range (Temperature)	-40 to +60 °C
Accuracy (Temperature)	±0.2 °C
Accuracy (Humidity)	±0.8 %RH (0 ... 90 %RH)
Output	4 to 20 mA
Sensor	humidity sensor and thermistor
Response Time	15 s
Communication	RS485