# Menus The RAPT Fermentation Chamber is designed to be largely controlled through the RAPT Portal. There are various on board functions which can be accessed directly through the on board menu. To use the on board menu, use the **Up** or **Down** buttons to navigate. Use the **Select** button to select or enter a function once highlighted. Use the **Return** button to escape from a Menu option or return to the prvious screen. Selecting Back will not save any changes. ### Register Device This option will only be available when the RAPT Fermentation Chamber is *not* registered to the RAPT Portal. For a step by step guide to registering your RAPT Fermentation Chamber please refer to [Getting Started](https://docs.rapt.io/equipment/rapt-fermentation-chamber/get-started) ### Profiles To access currently running Profiles, or Profiles that have been uploaded to the device, navigate to and select **Profiles** in the menu. From this menu, available Profiles can be started, stopped and paused. Active profiles can also be skipped to another step or reverted to a previous step. Please refer to [Profiles ](https://app.gitbook.com/o/wlVNEjFt3UiW0iKxpA2G/s/UqN4sW0x2s4yh6iiT8NN/~/changes/109/equipment/rapt-fermentation-chamber/profiles)for a full guide. ### Settings The following options are available in the **Settings** Menu. To change any of the advanced settings enter the Menu by pressing **Select** . Once in the menu navigate to Settings and press **Select** **Up** or **Down** buttons to adjust the set value for the setting. To save your setting hit **Select** . To return to the menu without saving choose **Cycle/Back** Some options are on/off toggles that can be activated or deactivated from the Settings Menu directly.
SETTINGPARAMETER
Temperature SensorSelect built-in probe or select any Bonded Bluetooth RAPT Pill & Hydrometer
Show GraphToggles display between the graph or a numerical display
Unit SystemToggles between metric or imperial data
Graph zoom levelSelect the date range displayed on the graph (default 7 days)
Cooling HysteresisSets the cooling hysteresis (range 0.0°C-10°C, default 1°C)
Heating HysteresisSets the heating hysteresis (range 0.0°C-10°C, default 1°C)
Compressor CooldownSets the minimum compressor delay (Range 0-10 minutes, default 5 minutes)
Mode Switch DelaySets the minimum mode switch delay (Range 0-30 minutes, default 15 minutes)
Cooler EnabledToggles cooling on or off (when unchecked, the cooling will not operate irrespective of other settings)
Heater EnabledToggles heating on or off (when unchecked, the heater will not operate irrespective of other settings)
Bluetooth EnabledToggles Bluetooth functionality on or off
Allowed Sensor Diff.This sets the allowed temperature differential between the built in probe and the current setpoint when using a Bluetooth device for temperature control (range 1°C-50°C, default 5°C). See Bluetooth Operation
Sensor timeoutSets the timeout if a Bluetooth device drops out (reverts to internal probe) (Range 5-1800 seconds, default 900 seconds)
Sounds EnabledToggles device sounds on or off
Calibration Point 1First Calibration Point (see Calibration)
Calibration Point 2Second Calibration Point (see Calibration)
Forget CalibrationDeletes saved calibration settings and restores defaults
NTC BetaEnter the NTC Beta of an external temperature probe. The default is 3950
NTC Ref. TemperatureEnter the NTC Ref. Temperature of an external temperature probe. The default is 298.2
NTC Ref. ResistanceEnter the NTC Ref. Resistance of an external temperature probe. The default is 100000
Relay Cycle TimeSets the allowed cycle time for PID heating (Range 5-3600 seconds, default 5 seconds)
PID HeatingToggles PID heating on or off (recommended for advanced users only)
Heat P CoefficientEnter desired proportional PID coefficient (Default 0.500)
Heat I CoefficientEnter desired integral PID coefficient (Default 0.0000)
Heat D CoefficientEnter desired derivative PID coefficient (Default 0.0000)
Forget WiFi ConfigForgets existing WiFi config - useful if you change WiFI networks
Disable WiFiDisables WiFi (if you wish to not use the RAPT Portal and have only manual control)
Clear RegistrationClears RAPT Portal registration (see Troubleshooting)
Low Temp. AlarmThis is the temperature below which an alarm will sound (default -10°C)
High Temp. AlarmThis is the temperature above which an alarm will sound (default 50°C)
Check For OTA UpdateManually check and download any available firmware updates
### Bluetooth Bluetooth needs to first be enabled in the [Settings ](#settings)menu (above). To **Bond** a Bluetooth enabled RAPT devices, use the **Up** or **Down** buttons to scroll to select the device. Choose **Select** button to **Bond** the device, or the **Cycle/Back** button to cancel. Once **Bonded**, the device will be visible in the **Bonded** section of the **Bluetooth Menu**. To **Unbond**, select the device with the navigation arrows and choose **Select** buttont to **Unbond** the device, or the **Cycle/Back** button to cancel. For more information about Bluetooth operation refer to the [Bluetooth ](https://docs.rapt.io/equipment/rapt-fermentation-chamber/bluetooth)section. ### Diagnostics The Diagnostics menu contains information about the RAPT Fermentation Chamber. This includes such information as current firmware version, Wi-Fi network and signal strength, MAC address and IP address of the device. ### About The About menu contains information specific to the firmware and software of the RAPT Fermentation Chamber and associated devices, including but not limited to copyright information, acknowledgment of open source properties used, legal information etc.