Burkert Type 8041 - Manual (Page 15)

13
Technicaldata
Current output
• Type of output
• Accuracy
• Refresh time
• Max. loop impedance • 4-20 mA, sinking or sourcing wiring
• ± 1% (0,16 mA)
• 100 ms
• 1100 W at 36 V DC, 330 W at
18 V DC
Frequency output
• Frequency
• Duty cycle
• Max current
• Protected against
short-circuits and
polarity reversal
• 0-240 Hz
• 50 % ± 1 %
• 100 mA max.
• yes
Relay output • Normally open or normally closed,
depending on the wiring
• 3 A, 250 V AC max.
Alarm
• Full scale exceeded
• Error signal
• 22 mA and 256 Hz
• 22 mA and 0 Hz
6.6. electrical connections
Type of connection Through two M20x1,5 cable
glands
Cable specifications
• cable type
• Cross section
• Diameter of each cable:
- if only one cable is used
per cable gland
- if two cables are used per
cable gland
• shielded
• 0,5 to 1,5 mm
2
- 6...12 mm
- 4 mm, with the supplied
multi-way seal
6.7. K factors
The S020 fitting with weld end connections is available
in two versions: a version for the measuring devices with
a G2'' nut and a version for the measuring devices with a
clamp connection.
• Use the K factor of the fitting used.
The device measures the flow velocity (in m/s) of the fluid and converts
it into a current (in mA) and a frequency rating (in Hz).
The current I or the frequency f are proportional to the flow rate Q (l/s),
the proportionality factor is called the "K factor":
f = K
1
*Q
I = K
2
*Q + 4
with K
1
and K
2
in pulse/litre
English
Type 8041