KROHNE OPTIFLEX 2200C SIL - Manual (Page 21)

SERVICE
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OPTIFLEX 2200 C
www.krohne.com 01/2013 - 4000738603 - AD SIL OPTIFLEX 2200 R03 en
i Make sure that this menu item is set to 0000. If the value is not set to 0000, the safety function will
not operate correctly.
Do a check of the low error alarm signal:
• Enter the supervisor menu. For more data on how to get access to the supervisor menu, refer
to the "Operation" chapter of the handbook (document [N1]).
• Push [ ] and [>>>>] to go to menu item SET OUTPUT (2.2.1).
• Do a functional test of the low error alarm signal. Set the menu item SET OUTPUT (2.2.1) to
3.5 mA 3.5 mA 3.5 mA 3.5 mA.
i The output will change to 3.5 mA. This output is not related to the measured value. Does the
device give a "low error" alarm signal? If there is no alarm signal, the safety function will
not operate correctly.
Measure the level and current output of the product in the tank at 3 points (example
procedure given):
• Find the data for the 4 mA and the 20 mA settings in the SIS specification.
• Fill the tank to the maximum level (without overfill). Measure the level of the product in the
tank with an approved level meter or indicator (reference device).
• Measure the output current with an ammeter.
i If the menu item OUTPUT FUNC. (2.4.1) is set to Level Level Level Level, make sure the output current value
is 20 mA. If the menu item OUTPUT FUNC. (2.4.1) is set to Distance Distance Distance Distance, make sure the output
current value is 4 mA.
• Remove the product from the tank until it is 50% full. Measure the level of the product in the
tank with an approved level meter or indicator (reference device).
• Measure the output current with an ammeter.
i Make sure the output current value is 12 mA.
• Remove the product from the tank to the minimum level. Measure the level of the product in
the tank with an approved level meter or indicator (reference device).
• Measure the output current with an ammeter.
i If the menu item OUTPUT FUNC. (2.4.1) is set to Level Level Level Level, make sure the output current value
is 4 mA. If the menu item OUTPUT FUNC. (2.4.1) is set to Distance Distance Distance Distance, make sure the output
current value is 20 mA.
INFORMATION!
The device is set to the "low" error alarm signal before delivery.
INFORMATION!
Make sure that the current output value linearly decreases from 20 mA to 4 mA, if the menu
item OUTPUT FUNC. (2.4.1) is set to Level
Level Level Level. Make sure that the current output value linearly
increases from 4 mA to 20 mA, if the menu item OUTPUT FUNC. (2.4.1) is set to Distance Distance Distance Distance.
The distance between 2 points in the tank must be as large as possible. We recommend that
there is a space of at least 1 m / 3.3 ft between 2 points in the tank.
You can adapt this procedure to special conditions. For example, if you use the safety function to
prevent an overfill, it is not necessary to remove the product from the tank to the minimum level.
It is only necessary to measure the level and current output of the product in the tank when it is
full (without overfill). and 50% full.