EF200W-C
21
Overvoltage protection
The device can be ordered with integrated overvoltage protection for diverse approvals:
Order code for "Accessory mounted", option NA "Overvoltage protection"
Input voltage range
Values correspond to supply voltage specifications → See page 17
1)
Resistance per channel
2 · 0.5 Ω max.
DC sparkover voltage
400 to 700 V
Trip surge voltage
< 800 V
Capacitance at 1 MHz
< 1.5 pF
Nominal discharge current
(8/20 μs)
10 kA
Temperature range
‒40 to +85 °C (‒40 to +185 °F)
1)
The voltage is reduced by the amount of the internal resistance I
min
R
i
Performance characteristics
Reference operating
conditions
• Error limits following ISO/DIN 11631
• +20 to +30 °C (+68 to +86 °F)
• 2 to 4 bar (29 to 58 psi)
• Calibration system traceable to national standards
• Calibration with the process connection corresponding to the particular standard
Maximum measured error
Base accuracy
o.r. = of reading
Re
min
Re
max
Re
Re
max
A2
A1
-A1
-A2
Re
1
Re
2
A0034077
Reynolds numbers
Incompressible
Compressible
Standard
Standard
Re
1
5
000
Re
2
20
000
