Practical-instrument-electronics 850 Manual de usuario descargar pdf (Pagina 39)

Page 37

Preliminary

Read mA

Ranges and Resolution

0.000 to 24.000 mA or -25.00 to 125.00%

of 4-20 mA, 0.000 to 52.000 mA or -25.00

to 105.00% of 10-50 mA

Accuracy ≤ ± (0.02 % of Reading + 0.003 mA)

Voltage burden ≤ 2V at 24 mA or 52 mA.

Overload/Current

limit protection

25 mA nominal

Source mA / Power & Measure Two Wire Transmitters

Ranges and Resolution

Same as Read mA

Accuracy ≤ ± (0.02 % of Reading + 0.003 mA)

Loop compliance voltage

≥ 24 DCV @ 20 mA, ≥ 40 DCV @ 52 mA

Loop drive capability 1200 Ω at 20 mA for 15 hours nominal;

800 Ω at 50 mA for ## hours nominal

Subtract 250 Ω with Hart Resistor

enabled (4-20 only)

mA 2-Wire Transmitter Simulation

Accuracy Same as Source/Power & Measure

Voltage burden ≤ 2V at 20 mA or 52 mA

Overload/Current limit 24 mA nominal in 20 mA range, 53 mA

nominal in 50 mA range

Loop voltage limits 2 to 60 VDC (fuse-less protected)

Specifications

DC Voltage Read

Range and Resolution

±99.999 mV, ±999.99mV, 0 to 10.250 V, 0.00

to 60.00 V DC

Accuracy

≤ ± (0.02 % of Reading + 0.01% Full Scale)

Input resistance ≥ 1 MΩ

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Practical-instrument-electronics 850 Manual de usuario Pagina 39