KROHNE optiplex 1300 c, Handbook

Page: 65 / 95

Handbook OPTIFLEX 1300 C
65 OPTIFLEX 1300 C
Scaling the current output
The current output setup mode is used to create current output scales for the first and second (if ordered)
outputs that meet your requirements. You must define:
1. Output function
function C.3.1.0 (output 1-level)
function C.4.1.0 (output 2-interface level)
2. 4 mA setting
function C.3.2.0 (output 1)
function C.4.2.0 (output 2)
3. 20 mA setting
function C.3.3.0 (output 1)
function C.4.3.0 (output 2)
4 and 20 mA settings are defined in terms of distance from the tank bottom or tank bottom offset. These are
the minimum and maximum points of your measuring scale.
Using the optional second output, you can set up a separate scale for measuring interface.
Risk of measurement error!
Do not set 4 mA setting within the device's blocking distance. Interference signals within this zone will block
the signal and freeze the reading before it reaches the measuring range limit.
Level measurement
As for distance measurement above, level is influenced by:
•
tank height
•
blocking distance
The reference point from which it is measured can be moved using:
•
tank bottom offset
Tank height
function C.1.2.0
Level is derived from distance and tank height (tank height - distance).
As an alternative to using true tank height, you can set tank height to probe length (to the top of the
counterweight or anchor for cable probes). This has the advantage of setting the zero reference for level
measurement above the non-measurement zone to effectively ignore it.
1 Tank height function (C.1.2.0) configured to true
tank height. Default zero reference for level is
shown in green on the right of the illustration.
2 Tank height function (C.1.2.0) configured to above
the cable probe counterweight (probe end for
coaxial and rod probes).
Default zero reference is shown in red.
3 Non-measurement zone where the reading on the
display freezes if part of the range is in this zone.