Baker Hughes PanaFlow Z1G, User Manual

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1. Disconnect any existing power line from its source.
2. Loosen the set screw on the rear cover.
3. Place a rod or long screwdriver across the cover in
the slots provided, and rotate the cover
counterclockwise until it comes free from the enclosure.
4. Install any required cable clamps in the appropriate
conduit holes around the side of the enclosure.
5. Refer to the labels inside the rear cover to assist in
making the power and option card connections. Also,
Figure 14 on page 15 shows the specific connection
labels for all available option cards.
2.4.1 Wiring the line power
The PanaFlow Z1G/Z2G Process Gas Flowmeter may be
ordered for operation with power inputs of either 85-240 VAC
(standard) or 12-28 VDC (optional). The tag plate on the side
of the electronics enclosure lists the required line voltage
and the power rating. Be sure to connect the meter only to
the specified line voltage.
WARNING!
Proper grounding of the PanaFlow Z1G/Z2G
Process Gas Flowmeter is required to prevent
the possibility of electric shock. See Figure
11 on page 12 for the location of the chassis
grounding screw.
WARNING!
For compliance with the European Union’s
Low Voltage Directive, this unit requires an
external power disconnect device such as
a switch or circuit breaker. The disconnect
device must be marked as such, clearly
visible, directly accessible, and located within
1.8 m (6 ft) of the meter.
WARNING!
Improper connection of the line power leads
or connecting the meter to the incorrect line
voltage may damage the unit. It may also
result in hazardous voltages at the flowcell
and associated piping as well as within the
electronics enclosure.
Refer to Figure 13 on page 14 to locate the correct terminal
block, and connect the line power as follows:
1. Prepare the line power leads by trimming the line and
neutral AC power leads (or the positive and negative DC
power leads) to a length 0.5 in. (1 cm) shorter than the
ground lead. This ensures that the ground lead is the
last to detach if the power cable is forcibly disconnected
from the meter.
2. Install a cable clamp in the conduit hole closest to the
power terminal block. Avoid using the other conduit
holes for this purpose to minimize any interference in
the circuitry from the AC power line.
3. Strip 1/4 in. of insulation from the end of each of the
three power line leads.
4. Route the cable through the conduit hole and connect
the line power leads to the terminal block, using the pin
number assignments shown in Figure 13 on page 14.
5. Leaving a bit of slack, secure the power line with the
cable clamp.
WARNING!
Make sure both covers, with their o-ring seals,
are installed and the set screws tightened
before applying power in a hazardous
environment.
CAUTION!
The transducers must be properly wired
before applying power to the meter.
(If the electronics enclosure is mounted
directly on the flowcell, these connections
are made at the factory prior to shipment.).
Proceed to the next section to continue the wiring of the
PanaFlow Z1G/Z2G Process Gas Flowmeter .
2.4.2 Wiring the transducers
Attention!
To meet CE Mark requirements for all units
intended for use in the EU or in high electrical
noise environments, all electrical cables
must be installed as described in Appendix
A, “CE Mark Compliance and High Noise
Environments” .
For a PanaFlow Z1G/Z2G Process Gas Flowmeter system with
the flow transmitter mounted on the flowcell, no external
transducer wiring is required. However, for a system with
a remote mounted flow transmitter, refer to the wiring
diagram in Figure 12 on page 13 to connect the transducers
and preamplifiers to the transmitter.
2.4.3 Wiring the standard 4-20 mA analog
outputs
The standard configuration of the PanaFlow Z1G/Z2G Process
Gas Flowmeter includes two isolated 4-20 mA analog
outputs (designated as outputs 1 and 2). Connections to
these outputs may be made with standard twisted-pair
wiring, but the current loop impedance for these circuits
must not exceed 600 Ω.
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