How to adjust time in eq 308 cth hygrometer ? I am unable to adjust it.

There could be several reasons why the humidity reading on the digital control is not accurate. Here are a few things you can try:

1. Calibrate the hygrometer: The first thing to do is to make sure that the hygrometer you are using to measure the humidity is calibrated correctly. You can check this by placing the hygrometer in a sealed container along with a wet sponge or cloth for a few hours. The hygrometer should read close to 100% humidity. If it doesn't, then it may need to be calibrated.
2. Check the humidity sensor: The humidity sensor in the incubator may be faulty or dirty. You can clean the sensor with a soft cloth or replace it if it is damaged.
3. Check the water level: Make sure that the water level in the incubator is sufficient. If the water level is low, the humidity will be low as well.
4. Check the ventilation: The ventilation in the incubator should be set to allow for proper air exchange. If the ventilation is not set correctly, it can affect the humidity level.
5. Check the room conditions: The room conditions, including temperature and humidity, can affect the humidity level in the incubator. If the room is too dry, it can affect the humidity level in the incubator. You may need to adjust the dehumidifier or add a humidifier to the room to maintain the proper humidity level.

Question edited for a lot more clarity.

Wow, I hope that bezel is solid gold!

https://spwindustrial.com/abbeon-cal-inc-m2a4b-relative-humidity-and-temperature-indicator/

Send it here. This is a precision instrument for professional use.

Abbeon M2A4B Hygrometer - Micro Precision Calibration

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The most important things to remember with weather stations are placement and battery power. To get an accurate reading, you must have the sensors in the proper spot. If they are on a roof, they must be at least 3 feet above the roof. The batteries should be changed yearly and replaced with Lithium type batteries. Your sensor suite is a combination of anemometer and thermo-hygrometer. You may be able to purchase another temp sensor. The manual shows multiple channels for that application. Send them a message and ask: http://www.lacrossetechnology.com/support/contact_lacrosse.php

This site has a good explanation for a what a hygrometer does and how they work. http://science.howstuffworks.com/nature/climate-weather/meteorological-instruments/hygrometer-info.htm

there are a few different kinds, the main ones are psychrometers, electrical hygrometers and dew-point hygrometers.

A dew-point hygrometer uses a metal mirros to catch moisture from the air to tell you the dew point, at what temperature the condensation appears is the dew point. For a better and more clear explanation see http://www.ehow.com/list_7153637_types-hygrometers.html

A hygrometer is an instrument for measuring the humidity of the air or a gas.

The EQ does not have a on off switch. Just chose what you want it to be by clicking on it. If the problem still occurs refresh your ipod by hold the menu and center button at the same time, then try again.

http://www.dxgtechusa.com/Support/Manuals/English/dxg308_eng.pdf