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Reference Manual
00809-0100-4860, Rev BC
Section 2: Installation
January 2013
Installation
Note
When using pulse output, be sure to follow these precautions:
Shielded twisted pair is required when the pulse output and 4–20 mA output are run in
the same conduit or cable trays. Shielded wire will also reduce false triggering caused
by noise pickup. Wiring should be 24 AWG or larger and not exceed 5,000 ft. (1500 m).
Do not connect the powered signal wiring to the test terminals. Power could damage
the test diode in the test connection.
Do not run signal wiring in conduit or open trays with power wiring or near heavy
electrical equipment. If needed, ground signal wiring at any one point on the signal
loop, such as the negative terminal of the power supply. The electronics housing is
grounded to the meter body.
If the flowmeter is protected by the optional transient protector, you must provide a
high-current ground connection from the electronics housing to earth ground. Also,
tighten the ground screw in the bottom center of the terminal block to provide a good
ground connection.
Plug and seal all unused conduit connections on the electronics housing to avoid
moisture accumulation in the terminal side
of the housing.
If the connections are not sealed, mount the flowmeter with the conduit entry
positioned downward for drainage. Install wiring with a drip loop, making sure the
bottom of the drip loop is lower than the conduit connections or the electronics
housing.
Figure 2-12. The Transient Terminal Block
Housing
Ground
Screw
Captive
Screws
Transient Terminal
Block Ground Tab