SERVICE
7
65
H250 M40
www.krohne.com
03/2020 - 4000640706 - MA H250-M40 R06 en
7.2.4 Replacement - Retrofitting ESK4A
The ESK4A is factory calibrated, making it possible to replace it or retrofit it without
recalibrating.
•
De-energise the ESK4A.
•
Lift and remove the ESK4A with a screwdriver.
•
The ESK4A plug-in tongues
1
are plugged in under the two bolts
2
on the base plate.
•
Slight pressure is used to press the ESK4A onto the spring pins
3
until it stops, firmly
attaching the ESK4A.
If a change in measuring range, product temperature, product, density, viscosity or pressure is
desired, this can be done with the help of a variable area calculation program and with a HART
®
modem.
However, each measuring unit is subject to its own physical limits, which the variable area
calculation program correctly calculates, and may thus reject the desired change. If a change is
performed using the program, the new data is also transmitted to the ESK4A:
•
Device identification
•
Device address
•
Serial number
•
Measuring point identifier
•
Digital measured value query in flow units, % and mA
•
Test / setting functions
•
Calibration 4.00 and 20.00 mA
•
Set current output to any desired value
CAUTION!
When replacing or retrofitting an ESK4A, it is mandatory to indicate the serial number (SN) or
sales order (SO) when ordering.
This information can be found on the indicator nameplate.
WARNING!
Do not damage the indicating element!
Figure 7-3: Replacement - Retrofitting ESK4A
