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3500 ELECTROMAGNETIC FLOW METER
ONICON Incorporated 727.447.6140 Page 9 onicon.com
Grounding probes may be required whenever meters are installed in pressurized systems with non-metallic or lined pipes.
Grounding probes can be hot-taped to avoid draining the system. A grounding probe is required before and after the
meter to ground any electrical noise coming from any direction.
1.5.2 Grounding Probes
1.5.3 The Temperature Sensors
The two temperature sensors must be located in such a manner as to accurately measure only the temperature of the
supply line entering and the return line leaving the portion of the piping system for which the energy measurement is
being made.
If possible, nd an easily accessible location where wire connections can be made from oor level. This will facilitate
any future service. Place the temperature sensors away from strong sources of electrical noise that might aect the
performance of the sensors.
One temperature sensor thermowell will need to be placed in the same pipe with the ow meter. It should be located on
the downstream side of the ow meter. The downstream distance between the thermowell and ow meter should be at
least ve pipe diameters, leaving enough clearance to remove either sensor from the pipe without interference from the
other sensor.
MODULE
ELECTRONICS
SLEEVE
(Length varies with
thermowell length)
SPACER
END PIECE
PLASTIC
SENSOR
TEMPERATURE
SIGNAL (RED)
REFERENCE (BLACK)
SUPPLY
S/N 123456
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