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Process Unit 73 LF - Knick

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<strong>Process</strong> <strong>Unit</strong> <strong>73</strong> <strong>LF</strong><br />

Display<br />

Display options<br />

Output 1*)<br />

Output 2*)<br />

Beginning/End of scale*)<br />

Spans<br />

Accuracy<br />

Current source function<br />

Power output<br />

Switching contacts *)<br />

Contact rating<br />

NAMUR contacts 2)<br />

Limit/controller contacts<br />

(Digital controller option 353)<br />

Cleaning contacts<br />

(Option 352)<br />

Graphic LCD, 240 x 64 pixels with CFL 1) backlighting<br />

Main display<br />

character height approx. 20 mm<br />

Secondary display character height approx. 6 mm<br />

Dialog display<br />

7 lines, character height approx. 4 mm<br />

Main display<br />

Secondary display<br />

conductivity conductivity [S/cm]<br />

resistivity resistivity [cm]<br />

concentration concentration [% by wt.]<br />

temperature temperature [C]<br />

time time [h,min]<br />

date<br />

[d,m,y]<br />

current output 1 [mA]<br />

current output 2 [mA]<br />

current input [%]<br />

controller output [%]<br />

controller setpoint<br />

man. temperature [°C]<br />

0 to 20 mA or 4 to 20 mA, max. 10 V, floating<br />

user-defined for conductivity, concentration, resistivity, C<br />

current characteristic user-defined: linear, bilinear, trilinear,<br />

function<br />

error message if load is exceeded<br />

0 to 20 mA or 4 to 20 mA, max. 10 V, floating<br />

user-defined for conductivity, concentration, resistivity, C<br />

optionally as analog controller output (option 483)<br />

current characteristic user-defined: linear, bilinear, trilinear,<br />

function<br />

error message if load is exceeded<br />

Anywhere within measurement range<br />

Conductivity<br />

≥ 0.20 S/cm, at least 20 % full scale<br />

Resistivity<br />

100 ⋅cm, at least 20 % full scale<br />

Concentration 1.00 to 200.0 %<br />

Temperature<br />

10.0 to 300.0 C<br />

< 0.25 % of meas. value + 20 A<br />

0.00 mA to 20.50 mA<br />

24 Vdc / 30 mA, floating, short-circuit-proof<br />

typical applications: loop current for universal input,<br />

signal current for switching outputs<br />

8 switching contacts, floating,<br />

overvoltage category II up to 250 V<br />

ac < 250 V/5 A < 1,250 VA resistive<br />

dc < 120 V/5 A

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