INFRATHERM
pyrometers IS 5 · IS 5-LO · IGA 5 · IGA 5-LO
46
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
Data
format UPP
®
) or via an external contact (for connection see
4.1 Connector pin assignment
on the back 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 trans-
ported on a conveyer belt and pass the measuring beam of the pyrometer only for a few sec-
onds. Here the maximum value for each object has to 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 ex-
ceeded.
Hold:
The function “hold” enables to freeze the current temperature reading at any moment. For this
an external push button or switch has to be connected (see connector pin J in
) which holds
the temperature reading as long as the contacts are closed.
Operation note:
dependent on the settings the maximum value storage either works in
single storage
mode
or in
double storage
mode:
Single storage:
the
single storage
is used when you want to reset the stored value using an external im-
pulse via
one
contact closure from an external relay (i.e. between two measured objects). The relay contact
is connected directly to the pyrometer between pins J and K. This mode allows a new value to be estab-
lished, after each impulse from the reset signal.
double storage:
when entering the reset intervals via push buttons or PC interface the
double storage
is
automatically selected. This mode utilizes
two
memories in which the highest measured value is held and is
deleted alternately in the time interval set (clear time). The other memory retains the maximum value
throughout the next time interval. The disadvantages of fluctuations in the display with the clock frequency
are thereby eliminated.
Note:
It doesn’t make sense to use the maximum value storage if an integrated
PID con-
troller
is used. Therefore the clear time should be set to
OFF position.
The
external delete
function
cannot be used when the PID controller is active, as
the switch contact (connector pin J) is used for emergency switch-off. If the maxi-
mum value storage is set to
external delete
when the PID controller is activated,
the clear time automatically will be set to OFF.
Note:
The maximum value storage follows the function of adjustment of exposure time.
This results in:
•
clear time
≤
the adjusted exposure time is useless
•
clear times must be at least 3 times longer than the exposure time
•
only maxima with full maximum value can be recorded, which
appear at least 3 times longer than the exposure time.
9.2
Internal temperature of the pyrometer
The internal temperature of the pyrometer can be read on the interface. It is a few degrees higher than the
ambient temperature due to the heat generated by the electronics.
9.3 Bus
address
For the connecting of several pyrometers with RS485 with one serial interface it is
necessary to give each instrument an individual address for communication. First it is
necessary to connect each single instrument to give it an address. After that all instru-
ments can be connected and addressed individually. If parameters may be changed
simultaneously on all pyrometers, the global
Address 98
can be used. This allows you to program all py-
rometers at the same time, regardless of the addresses that have already been assigned. If the address of a
pyrometer is unknown, it is possible to communicate with it using the global
Address
99
(connect only one
pyrometer).
Settings:
00
. . .
97
