PULSAR MEASUREMENT
25
CHAPTER 3 HOW TO USE YOUR DBI SENSOR
4-20 mA Device
The dBi Hart Intelligent Transduce
r can be used as an ‘out of the box’ 4 –
20mA device if this is the case then by default, when you switch the dBi
Series Intelligent Transducer on, the 4
–
20mA output will be proportional to
the
level
being seen, with respect to the maximum range and span of the
dBi model being used as detailed in the table below.
DBI 3
DBI 6
DBI 10
DBI 15
4 mA (Empty) 0% of Span
Distance from dBi Face in
metres
3.000
6.000
10.000
15.000
20 mA (Full) 100% of Span
Distance from dBi Face in
metres
0.125
0.300
0.300
0.500
LOOP CURRENT DRAW
TYPE
3.8
4
5
6
7
8
9
dBi3
5.6
3.8
1.5
1
1
1
1
dBi6
7.5
4.8
2
1.2
1
1
1
dBi10
9.8
6.6
2.7
1.7
1.3
1.05
1
dBi15
10.9
7.5
3.2
2
1.4
1.1
1
Time in seconds between firing: For example
–
if using a dBi 6 and the
target is causing a current draw of 5mA then the cycle time (the time
between measurements is 2 seconds.
Important Notice
Customised factory calibration of Span is available; please contact Pulsar
for further details.
Important Notice
When the dBi Series Intelligent Transducer is operated below 8mA then
the speed of response will decrease. See the following table for cycle
times:
Summary of Contents for dBi 10
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Page 24: ...DBI HART INSTRUCTION MANUAL 24...