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IMJ00503 V3E.DOC Page 31 of 40 19.02.2009

6.2.7 Error Reaction

Error Reaction defines how the alarm outputs will react if a measurement cycle is found to have

been unsuccessful.

Different setting options are available in order to cause error messages to trigger different kinds

of response as appropriate for a particular environment in which the LMC J 0040 3 operates.

Possible settings are 0, 1 and 2 with the following assigned effects upon occurrence of an error

message

Error reaction Alarm outputs

0 Preserves latest valid measurement state

1 Positive alarm hysteresis = LOW, negative alarm hysteresis = HIGH

2 Positive alarm hysteresis = HIGH, negative alarm hysteresis = LOW

Table 2: Alarm output behaviour

6.2.8 Measuring Time

Measuring Time is active in DM and DT measuring mode. As a general rule, it may be assumed

that the poorer the surface quality of a targeted object the more time will be required by the

LMC J 0050 3 to determine that target’s distance with specified accuracy. For example, if error

message E15 is output because of poor reflectance and too small a measuring time value, the

setting for measuring must be increased.

The available range for measuring time variation is 0 to 25.

Note: The greater the value which is selected for measuring time the longer the time which will

be available for measurement and the smaller the frequency at which measurement will be

performed.

“0” value setting is an exception. In this case, the LMC J 0050 3 will use its internal criteria for

evaluation.

In addition, by varying the Measuring time, one may also configure the measuring frequency.

This may prove helpful where data volumes have to be restricted. The following provides an

approximated measuring time equation:

Measuring time »

Measuring time × 240 ms (> 0)

Because different factors may result in frequency shifts, this equation can only be given in an

approximated relationship.

6.2.9 Display Offset

On selection of Display Offset, a desired amount of offset may be applied to the measured value

(for correction).

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Sentek LMC-J-0040-1 Manual de usuario Pagina 31