Pulsar dBi 10, Instruction Manual, Page: 19 / 55

PULSAR MEASUREMENT
19
Loop Resistance
For two wire operation, the maximum cable resistance allowable can be
calculated from the graph below. For example, if an dBi Series Intelligent
Transducer was supplied from 24V, the maximum total cable resistance is
600 ohms, for a typical 77 ohm /km cable this would mean a maximum cable
length of 600/77 = 7.8km, remember this total cable resistance, so this
figure must be divided by 2 to give 3.9km max distance.
Maximum cable resistance vs supply voltage.
Preparation for Operation
Before switching on, check the following:
✓
The dBi Series Intelligent Transducer is mounted correctly.
✓
The power supply is correctly installed.
Important Notice
If the equipment is installed or used in a manner not specified in this
manual, then the protection provided by the equipment may be impaired.