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Safe Use Instructions - FloBoss 103
Orifice Plate mounted to an orifice plate via a 3-
or 5-valve manifold. See Figure 9.
At the factory, the Dual-Variable Sensor's connector
is mounted to a coupler, which is mounted directly
on a flat flange to the FloBoss enclosure with a 4-
bolt pattern.
The optional blank plate is available when the
FloBoss 103 is ordered without a DVS sensor. At the
factory, the blank plate is mounted directly on a flat
flange to the FloBoss enclosure with a 4-bolt pattern.
The blank plate mounts onto a pipestand, using the
standard Rosemount 2-inch pipe mounting kit and 2
user-supplied bolts (5/16 X 1 3/8) and lock washers.
With either mounting method, the pressure inputs
must be piped to the process connections on the
DVS sensor. Both the static and differential
pressures are piped to female ¼-18 NPT
connections on the base of the DVS sensor. For the
manifold startup/shutdown procedure, refer to the
FloBoss 103 Flow Manager Instruction Manual
(Form A6114).
The DVS sensor is an upstream device, meaning
that the static pressure line normally connects to the
high pressure side (labeled H on the sensor body).
4. The FloBoss must be properly grounded. The
FloBoss 103 has one grounding screw outside the
enclosure and two grounding screws inside the
enclosure. See Figure 3.
External
Grounding
Screw
Figure 3. Back End of FloBoss 103 (with Termination
Proper grounding of the FloBoss 103 helps to
reduce the effects of electrical noise on the unit's
operation and protects against lightning. The
FloBoss provides lightning protection for built-in field
wiring inputs and outputs. Install a surge protection
All manuals and user guides at all-guides.com
Internal
Grounding
Screws
Board)
device at the service disconnect on DC voltage
source systems to protect against lightning and power
surges for the installed equipment. You may also
consider a telephone surge protector for the optional
dial-up modem communications card.
All earth grounds must have an earth to ground rod or
grid impedance of 25 ohms or less, as measured with
a ground system tester. The grounding conductor
should have a resistance of 1 ohm or less between the
FloBoss enclosure ground and the earth ground rod or
grid.
If the pipeline to earth impedance is greater than 2
ohms, the FloBoss installation should be electrically
isolated and a ground rod or grid grounding system
installed.
The recommended cable for I/O signal wiring is an
insulated, shielded, twisted-pair. The twisted pair
and the shielding minimize signal errors caused by
EMI (electromagnetic interference), RFI (radio
frequency interference), and transients.
5. The FloBoss must be connected to power, I/O
devices, and communication devices. The external
connections, or field terminals, are all located on the
termination board. The terminal block accepts wires
up to 16 AWG in size.
The FloBoss Termination Board connectors use
compression terminals. The input power termination
(CHG+ / CHG-) uses a removable connector and
accommodates wiring up to 16 AWG in size. In all
cases, make connections by baring the end (6 mm
maximum) of the wire, inserting the bared end into
the clamp beneath the termination screw, and then
tightening the screw to 0.25 N-m.
Access to wiring connections is via field wiring
entries. The metal pipe plugs provided must remain
in place on unused entries to maintain flame-proof
integrity of enclosure. If these plugs are replaced for
any reason, only install certified plugs or thread
adapters that meet or exceed the product ratings.
NOTES:
Caution: Do not over torque the connector
screws.
Check the input power polarity before turning on
the power.
The inserted wires should have a minimum of bare
wire exposed to prevent short circuits. Allow some
slack when making connections to prevent strain.
The FloBoss 103 accepts input voltages from 8.0
volts to 28 volts at the charge terminals (CHG+ /
CHG-) with no external current limiting (internal
current limit is 200 mA).
Form A6150
Page 3
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