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TTI-22 Iss.04– 11/15
7.4
Setting Backlight and Contrast
1.
To set the backlight, switch to menu 2 Edit Configuration > 6 Units & Backlight > 2 Backlight.
Fig. 7 - 3
Setting backlight and contrast
In this menu you can set the backlight to be automatically activated (ON) or deactivated (OFF)
whenever TTI-22 is switched on.
During operation you can use the "Lamp" key to activate or deactivate the backlight at will.
2.
To set the contrast, select the menu item 3 Contrast and press <
>. Each press of the key changes
the contrast level by 1 step.
7.5
Entering Sensor Parameters and Assigning to a Sensor Inlet
TTI-22 measures the electrical resistance of the connected platinum sensors and uses it to calculate the
temperature via internal formulas (standard case: quadratic equation).
These formulas’ coefficients, which are different for each sensor, are called sensor parameters (or
calibration parameters). Find these parameters in your calibration certificate.
Calibration parameters for up to 30 sensors can be stored in TTI-22.
Caution:
When performing a precise temperature measurement, only use calibrated sensors.
7.5.1 Entering or Changing Calibration Parameters for a Sensor
For each sensor you connect to the instrument you have to enter the calibration parameters according to
the calibration certificate in order to measure temperatures.
Fig. 7 – 4
Entering, deleting and assigning calibration parameters
Caution:
Make sure that you are using the correct calibration parameters for your sensors, since incorrect
calibration parameters lead to erroneous results.
