Operation
SITRANS LC300
Operating Instructions, 05/2021, A5E47904073-AA
27
• Pressing the Down button for less than 1 second decreases the URV in the
current step size (initially 0.01 pF).
• When held for more than 1 second, the Down Button will increase the step
size by 0.1, 10, 100, and 1000. When no button is pressed for 4 seconds, the
step size decreases to the next smallest value.
• Pressing both buttons for more than 1 second sets the URV to the current PV
value.
6.8
6.9 Menu position 3
Position 3 displays the Analog signal as it is set for the loop current. The Up and Down
buttons set the system fault protection settings (according to NAMUR NE 43). System fault
protection is used by control equipment to determine whether or not the LC300 is presenting
a reliable signal.
When a system fault occurs:
Position 3 fault protec-
Menu 3 LCD display Current signal to D.C.S Menu 0 reading
with FLT
C:An mA value at time of
none pF reading
• LCD shows the Analog Signal as it is set for the loop-current in mA. Normal prima-
ry variables would give mA values between 3.8 mA (lower saturation point) and
20.5 mA (upper saturation point).
• When the reading goes above the URV or below the LRV but still within the meas-
urement range of the unit, it will remain at 20.5 or 3.8 respectively until the level
returns between URV and LRV.
• Pressing the Up button for less than 1 second shows the system fault protection
setting.
• Holding the Up button for longer than 1 second will change the fault protection
setting to C:Hi.
a)
• Pressing the Down button for less than 1 second shows the system fault protec-
tion setting.
• Holding the Down button for longer than 1 second will change the fault protection
setting to C:Lo.
Both buttons
• Pressing both buttons for more than 1 second disables the system fault protection
and the LCD will read C:An.
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