Calculation Of Output Currents - Testomat EVO TH Serie Manual De Instrucciones

Input basic programming data
CURRENT INTERFACE TYPE
0/4mA
5mA
10mA
15mA
20mA
How is the current calcu-
lated for a
specified measurement
value?
Function
0 - 20 mA
Function
4 - 20 mA
Measurement range not
attained (e.g. <0.05 °dH)
Measurement range ex-
ceeded (e.g. >0.5 °dH)
48
Monitoring the measurement point
Connecting a recorder allows the analytical results to be document-
ed. For this purpose, the device includes a programmable current
output.
The following example indicates the course of the current within the
range of 0-20 mA.

Select in the menu
basic program
=>
*

Select the desired current range.

Confirm the selection with "OK"

Calculation of output currents

Depending on the selected function, the current range available is
either 0 – 20 mA or 4 – 20 mA. The resulting currents for the various
measurement values are shown in the form of the following formulas.
Current =
current =
The current is set to 0 or 4 mA.
The current is set to 20 mA.
Measurement value = display value in the selected hardness unit
Maximum value = final value of the indicator used
(e.g. indicator type 2005 = 0.5 °dH)
current interface type
=>
Measurement value
Measurement range upper limit
measurement value
Measurement range upper limit
x 20 mA
x 16 mA + 4 mA