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Analog Output Signalling (proportional or 2-state): menu level 0
Analog mode (the loop-current) can provide either:
•
a 4 to 20 / 20 to 4 mA output proportional to the percent of the range
or
•
a 4 or 20 / 20 or 4 mA output, when 2-state mode is selected
Note:
To set values for Upper and Lower Threshold Delay, and Upper and Lower
Threshold Setting (2-state mode), the loop-current menu (07) must be in 2-state mode.
When the loop-current control is in analog mode, the LCD displays only - - - - for
these menu selections.
Upper Threshold Delay (2-state mode)
The Upper Threshold Setting controls the Activation delay: the amount of time that has to
pass uninterrupted with the probe covered to a level above the Upper Threshold Setting
before the timer expires. When the timer expires, the output signal complies with the
setting from Menu 08 for a covered probe. Whenever the level drops below the Upper
Threshold Setting before the timer expires, the timer is restarted.
As an extra identifier, an upward running A is displayed to the right of the value.
Menu
Affected
Item
by:
03
07
1. Set the loop-current control (Menu 07) to 2-state mode.
2. Set the rotary switch to 3.
3. Press the RED (+) or BLUE(–) button to increase or decrease the value.
or: Press and hold a button to start a repeat function.
or: Press and hold both buttons simultaneously to toggle the value between
minimum (0) and maximum (100).
Lower Threshold Delay (2-state mode)
The Lower Threshold Setting controls the Deactivation delay: the amount of time that has
to pass uninterrupted with the probe covered to a level below the Lower Threshold
Setting before the timer expires. When the timer expires, the output signal will comply
with the setting from Menu 08 for an uncovered probe. Whenever the level rises above
the Lower Threshold Setting before the timer expires, the timer is restarted.
As an extra identifier, a downward running A is displayed to the right of the value.
7ML19985GE04
Rotary
Left
Switch
Mode
Arrow
Position
2-
state
3
Off
Analog *
SITRANS LC500 – OPERATING INSTRUCTIONS
Added
Description Values
Indicator
Upward
Upper
running A at
Threshold
right of value
Delay
in
seconds
Display
shows
- - - -
Page 63
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