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Idiomas disponibles
Thermotronik T77
Supply voltage
Note: When measuring the switching output with high-load
measuring device inputs or when used as a frequency output,
the load must be set to 10 kΩ between the output and earth
(GND) to avoid faulty measurements.
5 Operation and control
NOTICE
The device must not be operated beyond its specifications.
5.1 Start-up procedure
The device will automatically switch on when connected to
power. It will first briefly display the software version, at
which time the device will also check the built-in components.
The display will then switch to displaying measurements.
The following describes the function of the display and control
unit:
LEDs
Control keys
If an error message appears in the display during operation,
please refer to the Troubleshooting table under chapter "Ser-
vice and Repair".
5.2 LED statuses
LEDs above the measurement display indicate the status of
the temperature switching outputs. The LEDs are perman-
ently assigned to the switching outputs.
The following table shows the factory settings:
LED 1 – yellow
Status switching output 1
LED 2 - red
Status switching output 2 (if applicable)
LED 3 – yellow
Status switching output 3 (if applicable)
LED 4 – red
Status switching output 4 (if applicable)
The switching characteristics of the LED (on if switching con-
tact closed or open) can be changed.
BX140013 ◦ 07/2019E
5.3 General key functions
The keys below the display are used for operation.
The menu controls are detailed in the following chapters.
Key Mode
Display
60 s
no ac-
tion
To select a menu item and to enter values:
• Open the main menu with the
• Select the submenu with the
• If necessary, select the next submenu with the
• Select the desired menu item with the
• Set the value with the
• Select the menu item EXIT to exit the submenu and con-
Function
• Measurement
Toggles the display unit.
display:
Move down one menu level.
• In the menu:
Move up one menu level.
• At the end of
the menu:
The display indicates the end of the
menu.
Confirm and save a numerical
• Following in-
value entered or a function selec-
put/selection:
tion. The display will flash if a para-
meter has been changed.
• Measurement
Displays the configuration.
display:
Scroll up menu item, numerical
• In the menu:
value or function selection. Hold-
ing the key will continuously scroll.
• Measurement
Go to main menu.
display:
Scroll down menu item, numerical
• In the menu:
value or function selection. Hold-
ing the key will continuously scroll.
• In the menu: Exit the main / sub / drop-down
+
menu and return to displaying the
measurement without saving
changes to the parameters.
Move to the next higher menu
• In the menu:
+
level.
• In the menu: Exit the main / sub/ drop-down
menu.
submenu with the
key.
keys and open with the
open the list of values with the
and
the
key. The new settings will the saved and the device
will return to the submenu.
firm with the
key. The device will return to the next
menu level up or to the measurement display.
key.
and
keys and open the
and
key.
and
keys and
key.
keys and confirm with
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