Start-up – KROHNE OPTIBAR DP 7060 C EN User Manual

Page 46

START-UP

OPTIBAR DP 7060 C

www.krohne.com

04/2014 - 4003292001 - MA OPTIBAR DP 7060 C R01 en

Sensor

mounting

correction

The mounting position of the device has a great impact on the measured value (offset), especially with

small measuring ranges and isolating systems. The sensor mounting correction compensates this

offset. The sensor mounting correction can automatically take on the current measured value as

correction value (auto correct). Alternatively, this correction value can also be manually entered using

the "Edit" function. Once the sensor mounting correction has taken place, the measured value is

corrected to 0. The sensor mounting correction can compensate a maximum of 20% of the nominal

range.

Offset

Input in adjustment unit, automatic transfer

of the current measured value

Adjustment

Adjustment refers to setting the zero point (zero) and maximum measured value (span). These values

correspond to the values of 4 and 20 mA. If the adjustment ranges are exceeded, the message

"Outside parameter limits" is displayed.

Distance

Density

Density
Distance in m (for kg/cm

) and ft (for lb/ft

)

Interface

Distance in mm, cm, m, in and ft

Min.-adjustment / Zero

Process pressure, differential pressure

Zero in %, pressure

Level and flow (standard 0%)

Min. in X %, pressure or filling height

Density

Min. in X %, density

Interface

Min. in X %, interface

Max.-adjustment / Span

Process pressure, differential pressure

Span in %, pressure

Level and flow (standard 100%)

Min. in X %, pressure or filling height

Density

Min. in X %, density

Interface

Min. in X %, interface

Damping

For the damping of process-dependent measured value fluctuations, you can choose a suitable

integration time. The values which can be entered are from 0 … 999 seconds with an increment of 0.1

seconds.

Integration time

In 0.1 second increments

Linearization

A linearization is necessary for all vessels in which the volume does not increase linearly with the

level height, e.g. in a horizontal cylindrical or spherical tank, and the indication or output of the

volume is required. Corresponding linearization curves are preprogrammed for these vessels. They

represent the correlation between the level percentage and vessel volume. By activating the

appropriate curve, the volume percentage of the vessel is displayed correctly. Enter the desired

parameters using the function buttons and save the entries. Note the following if the differential

pressure signal converter with corresponding approval is used as part of an overfill protection system

according to WHG (Water Resources Act): If a linearization curve is selected, the measuring signal is

no longer linearly proportional to the level. This must be taken into consideration by the user,

particularly when setting the switching point on the limit signal indicator.

Type of linearization

Level

Linear, Horiz.cylinder, Sphere and User

programmable

The square of the flow is proportional to the pressure differential at the orifice plate or averaging pitot

tube:
q

~dp

To establish a linear relationship between flow rate and output variable, a square root extraction is

required: q~√dp

The differential pressure transmitter has this square root function. It is selected in menu item

"linearization curve". Enter the desired parameter using the appropriate keys and save your entries.

When selecting the "bi-directional square root" flow, the minimum adjustment must be entered with

a negative sign.

Type of linearization

Flow

Linear, To square root, Bi-directional linear,

Bi-directional square root and User

programmable

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