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1. GENERAL DESCRIPTION
1.1.
Profile
Indicators 650 L and 1250 L are a family of devices used to
limit overheating in industrial processes.
In the event of alarm, the instrument latches the fault con-
ditions until reset by the operator. Reset can be run by the
operator from the front key (red R), from the digital input
(optional) or serial line (optional).
As an additional feature, the instrument counts the number
of times the alarm limit is exceeded and total amount of
time the alarm is active.
This information can help to evaluate furnace deterioration
and plan maintenance work.
The devices have the same main characteristics and the
same range of functions. They differ in size (1/16, 1/8 DIN),
the amount of information shown on the display, and the ma-
ximum number of digital inputs.
The displays show the process values, plus multilingual
scrolling messages for diagnostics and alarms.
The 1250 L model includes a segmented bar that graphical-
ly displays the temperature deviation from the alarm limit.
Configuration and unit operation is done with the front keys.
The keys have
dual-function LEDs indicating pressing of the keys. The
LEDs provide feedback for pressed
key and also provide guidance for permitted operations.
1.
GENERAL DESCRIPTION
650 L
80224_MHW_650 L - 1250 L_07-2018_ENG - 6
1250 L
Initial commissioning is simplified by guided configuration
text prompts that cover the commonly used
base parameters accompanied by in line help messages.
With GF_eXpress software and PC, you can program the ex-
tended configuration, create recipes and update the firmwa-
re without having to apply power to the instrument.
Thanks to the Smart Configurator function, you obtain the
required configuration by answering a few simple questions.
The initial parameters can always be reset, both from the
keypad and from the GF_eXpress software.
The devices offer complete diagnostics (broken or incorrect
connection of sensor), operation count, settable alarm limits
(useful for scheduling preventive maintenance)
A trigger meter and alarm memory reset timer are available
for alarm 1.
Maintenance of the system in which the device is installed
is made easier by the ability to replace the instrument at any
time simply by removing it from the faceplate.
No additional steps are needed.
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