Set Up The Calculation; Modbus Registers - Hach 4-20 mA Manual Del Usuario

5. Select SET FUNCTION>LOGARITHMIC and then select the
applicable options in the ACTIVATION menu.
Option Description
SET 50% VALUE Sets the value corresponding to 50% of the process
variable range.
SET HIGH VALUE Sets the high endpoint (upper value) of the process
variable range.
6. Select SET FUNCTION>BILINEAR and then select the applicable
options in the ACTIVATION menu.
Option Description
SET LOW VALUE Sets the low endpoint of the process variable
range.
SET HIGH VALUE Sets the high endpoint (upper value) of the
process variable range.
SET KNEE POINT Sets the value at which the process variable
VALUE range divides into another linear segment.
SET KNEE POINT Sets the value of the current at the knee point
CURRENT value.
Set the error hold mode
1. Select SETUP SYSTEM>SETUP OUTPUTS>ERROR HOLD MODE.
2. Select an option.
Option Description
HOLD OUTPUTS Holds the outputs at the last known value when
communications are lost.
TRANSFER Switches to the transfer mode when communications
OUTPUTS are lost. The outputs transfer to a pre-defined value.

Set up the calculation

Set up variables, parameters, units and formulas for the analyzer.
1. Select CALCULATION.
2. Select an option.
Option Description
SET VARIABLE X Selects the sensor referring to the variable X.
SET PARAMETER X Selects the parameter referring to the variable X.
SET VARIABLE Y Selects the sensor referring to the variable Y.
SET PARAMETER Y Selects the parameter referring to the variable Y.
SET FORMULA Selects the calculation formula to complete. Options:
None, X-Y, X+Y, X/Y, [X/Y]%, [X+Y]/2, X*Y, [X-Y]%/X
DISPLAY FORMAT Selects the number of decimal places shown in a
calculation result. Options: Auto, XXXXX, XXXX.X,
XXX.XX, XX.XXX, X.XXXX
SET UNITS Enters the unit name (maximum of 5 characters).
SET PARAMETER Enters the measurement name (maximum of
5 characters).

Modbus registers

A list of Modbus registers is available for network communication. Refer
to www.hach.com or www.hach-lange.com for more information.
English 11