# Settings Menu

> [!note] このページはまだ翻訳されておらず、英語で表示されています。


![image description](../_images/1756289728511-settings-2.webp)
 
 ![image description](../_images/1756289820765-settings.webp)

![image description](../_images/1756289877487-key.webp) 
Used to enter calibration and factory options

![image description](../_images/1756289901948-calendar.webp)
Used to adjust the instrument time and date

![image description](../_images/1756289908445-manual.webp)
Used to access links to an online manual.

![image description](../_images/1756290071263-settings.webp)
Maintenance menu

## UNITS
 Change the instruments displayed temperature between Degrees Celsius or Degrees Fahrenheit.

## COOLANT
 Change the water coolant type between chiller mode and mains mode. 
Chiller mode should be used If the instrument is being used with a recirculating water chiller. When a coolant is not required an internal bypass valve will open so that the water flow is not stopped. This avoids the pump in the chiller from being deadheaded that can lead to permanent damage.\
Mains mode should be used when the instrument is being used with mains water. The internal bypass valve is deactivated so that only water is taken when required.