Basic Calibration (Scale -> Calibration); Activating Control Mode (Scale -> Control Mode); Settings For The Zero Point (Scale -> Zero) - KERN FTB Service Manual

7.10 Basic calibration ( SCALE –> Calibration )
The basic calibration uses the display unit 1 ( SCALE –> Display –> Unit 1 ).
Procedure
• Before calibration the geo adjustment value should be checked and corrected if necessary (chapter 7.8). It cannot be
changed again subsequently.
• Start the calibration. You will be prompted to confirm the preload. Place the desired preload on the pan and confirm it. If
there is already a test load on the scale, measurement of the preload can be interrupted manually with
case the existing zero point is used as a reference. This is useful if larger scales have already been loaded with heavy test
weights, which would have to be removed in order to determine the preload.
• Once the preload has been measured, the display prompts you to place the calibration weight corresponding to the
maximum load on the pan. If you do not want to calibrate with this value (e.g. because not enough weights are avail-
able), you can choose a different value (available values depend on the capacity of the weighing system). Note: You are
generally recommended to calibrate the scale at maximum load, especially in the case of certifiable scales.
• Place the desired weight on the pan and confirm its value. Calibration is now performed, after which its successful
completion is briefly confirmed. (Calibration can be cancelled at any time with the
Activating control mode ( SCALE –> Control Mode )
7.11
In this menu the current weighing result is displayed at high resolution (without the weighing unit). This enables the weighing
system to be checked after calibration and/or linearization, for example.
7.12 Settings for the zero point ( SCALE –> Zero )
This menu includes a number of submenus with settings for the zero point. These submenus are described in the following
sections:
Specifying the zero capturing range ("Zero-Capture")
Shifting the calibration zero point ("Set Zero")
This menu block also includes the auto zero block. This menu block is also available to the supervisor so it is not described
here (see User Manual).
7.12.1 Specifying the zero capturing range ( SCALE –> Zero –> Zero-Capt. )
This menu can be used to specify the range in which the scale is set to zero when it is switched on or when
The following settings are available:
"–2%/2%"
"–2%/+18%"
Note: The zero capturing range affects the nominal capacity of the weighing system. If the capacity of a load cell is fully
utilized, the zero capturing range can be reduced to –2% to +2%.
7.12.2 Shifting the calibration zero point ( SCALE –> Zero –> Set Zero )
The calibration zero point can be moved in this menu. This is necessary if an auxiliary preload is used or if calibration cannot
be performed with the existing preload and it is outside the zero capturing range (in which case the scale would not be able to
start up). The corresponding preload must be in position in order for "Set Zero" to be executed. The zero point for calibration by
the supervisor is moved to this value, as is the reference point for the zero capturing range.
FTx/ITx-SH-e-0720
The zero capturing range is –2% to +2% of the nominal load (certifiability to NTEP)
The zero capturing range is –2% to +18% of the nominal load (certifiability to OIML)
key).
––> Chapter 7.12.1
––> Chapter 7.12.2
, in which
is pressed.
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