Tuthill SOTERA SYSTEMS 825P Manual De Operación Y Seguridad página 7

825P / 850P Series Digital Meters are equipped with an
integral pulser for use with Fuel Management Systems
and batching equipment. These meters must also be
connected to an auxiliary external power supply to
operate the pulsing feature. 5-24 VDC external power is
required for the pulse outputs on pins 2 and 3 to operate.
Failure to attach external power can cause premature
battery failure. External power must be from 5 - 24
VDC.
NOTE: When powering the 4-20mA loop, a minimum of
7 VDC is required at the 825P/850P meter for consistent
operation.
The manufacturer of the 4-20mA receiver will supply
voltage drop information as well as their minimum voltage
requirements in their literature.
Electrical Wiring Information
7
NOTE: If the meter is to be used in environments with
high levels of EMC or RF sensitive equipment, connect
the braided shield of the cable to an earth ground.
The 825P / 850P meters are designed to conduct ESD
and EMC surges through the braided shield.
NOTE: The pulse width for volumetric output and air
detect is 10ms.
DO NOT connect the braided shield to the ground of the
Power Supply, or the 4-20mA loop power.
DO NOT install or operate this meter in an explosive
atmosphere!