Holtgreven GSE-665 - Manual (Page 34)

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T EMP Z ERO ?
Temp Zero? is used to recalibrate without establishing a new zero. In some
applications you might want to perform a calibration without removing the
currently applied load. This is particularly useful in tank weighing
applications where it is both time-consuming and costly to drain the tank
being weighed.
During the calibration procedure, at the Temp Zero? prompt you press
[ENTER]. This action causes the controller to zero the displayed weight
temporarily so additional weight can be added to assure system calibration.
The zero determined during the previous calibration is not affected.
1. Access the Calibration Mode (see page 23).
2. Use the [SELECT] key to toggle to Temp Zero?.
3. At the Temp Zero? prompt, press [ENTER].
The displayed value will zero out.
4. Apply the calibration weight.
5. Key in the value of the calibration weight: for example, 1 0 0 0
[ENTER]. For the Model 460, use the [PRINT] and [UNITS] keys to
enter numeric values. Refer to Table 2: 460 Key Functions on page 8.
The numeric display should show the entered value.
6. Remove the calibration weight. The display should return to zero. If the
display reads as specified, at the Cal OK? prompt press [ENTER]. To
repeat the calibration process, press [CLR], and then repeat steps 2
through 5.
7. Save the newly determined calibration weight: At the Enter = Save
prompt, press [ENTER]
8. To return to the Weighing Mode, at the ENTER = EXIT prompt, press
[ENTER].
O NLY Z ERO ?
Only Zero is used to establish a new calibration zero without affecting the
span. This is useful for correcting changes to the scale’s dead load, for
example in tank weighing applications where the re-zero parameter (P118) is
set very low in order to prevent inadvertent re-zeroing. A build-up of sludge
can be zeroed out in this manner.