ISR 12-LO/GS Manual
Settings / Parameter Descriptions
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4.6
Exposure time (t
90
/ s)
The exposure time is the time interval when the measured temperature must
be present after an abrupt change so that the output value of the pyrometer
reaches a given measurement value. The time taken is to reach 90% of the
recorded temperature difference. In the “min” position, the device operates
using the time constant 2 ms.
The dynamic exposure time adjustment prolongs the exposition time at the lower range limit.
4.7
Clear time of the maximum value storage (t
CLEAR
)
If the maximum value storage is switched on always the highest last
temperature value will be displayed and stored. The storage must be cleared
at regular intervals for exchanging by a new and actual value.
This feature is particularly useful when fluctuating object temperatures cause
the display or the analog outputs to change too rapidly, or the pyrometer is
not constantly viewing an object to be measured. In addition, it may also be
beneficial to periodically delete and reset the stored maximum values.
The following settings are possible:
OFF:
At clear time “OFF“ the max. value storage is switched off and only momentary
values are measured.
0.01...25 s:
If any clear time between 0.01 s and 25 s is set, the maximum value is estimated and
held in double storage mode after the entered time, the storage will be deleted.
Extern:
The external clearing can be activated and used within an own software (see section
7, Data format UPP
) or via an external contact (for connection see
3.1.1 Pin
assignment for the male socket on the back of the pyrometer
). In this case,
the storage operates only in single storage, because only a single deletion
mechanism is used.
Auto:
The “auto” mode is used for discontinuous measuring tasks. For example, objects
are transported on a conveyer belt and pass the measuring beam of the pyrometer
only for a few seconds. Here the maximum value for each object must be indicated.
In this mode the maximum value is stored until a new hot object appears in the
measuring beam. The temperature which has to be recognized as “hot“ is defined
by the low limit of the adjusted sub range. The stored maximum value will be
deleted when the temperature of the new hot object exceeds the low limit “
from
“
of the sub range by 1% or at least 2 °C. If a lower limit is not entered, the maximum
value storage will be deleted whenever the lower level of the full measuring range
has been exceeded.
Hold:
The function “hold” enables to freeze the actual displayed pouring stream
temperature
(or the current temperature reading if the instrument works not in
foundry mode)
at any moment. For this an external push button or switch must be
connected (see
3.1.2 Connector pin J
) which holds the temperature reading as
long as the contacts are closed.
Settings:
min
0.01 s
0.05 s
. . .
9.99 s
Settings:
OFF
0.01 s
. . .
25 s
extern
auto
hold
