ISR 12-LO
•
IGAR 12-LO Operating Manual
Settings / Parameter Descriptions
•
27
4.7
Response time / exposure time (t
90
)
The exposure time is the time interval when the measured temperature has
to 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 “0.00” position, the
device operates using the time constant 2 ms.
The dynamic exposure time adjustment prolongs the exposure time at the
lower range limit.
4.8
Clear time of the maximum value storage (t
CL
)
If the maximum value storage is switched on always the highest last
temperature value will be displayed and stored. The storage has to 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 shapter
7, Data format UPP
) or via an external contact
(for connection see
3.2, Pin assignment
for the connector on the
bottom side 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 has to be indicated. In the “auto”
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 temperature range. The stored
maximum value will be deleted when the temperature of the new hot
object exceeds the low limit of the temperature range or adjusted
temperature sub range by 1% or at least 2 °C.
Hold:
The function “hold” enables to freeze the current temperature reading
at any moment. For this an external push button or switch must be
connected (see
3.2.1, Connector pin J
) which holds the temperature
reading as long as the contacts are closed.
Settings:
Min
0.00 s
0.01 s
0.05 s
.
.
.
10.00 s
Settings:
off
0.01
s
. . .
25 s
Extern
Auto
Hold
