CDI Meters CDI 5400 User manual

cdimeters
CDI Meters, Inc.
3R Green Street, Woburn, MA 01801
email: [email protected]
call toll free: 866-885-2462
www.cdimeters.com
Warranty
CDI warrants solely to the buyer that the Model 5400 Flowmeter shall be free from
defects in materials and workmanship, when given normal, proper and intended
usage, for three years from the date of purchase. During the warranty period, CDI will
repair or replace (at its option) any defective product at no cost to the buyer. The
foregoing warranty is in lieu of any other warranty, express or implied, written or oral
(including any warranty of merchantability or fitness for a particular purpose). CDI’s
liability arising out of the manufacture, sale or supplying of the flowmeter, whether
based on warranty, contract, tort or otherwise, shall not exceed the actual purchase
price paid by the buyer, and in no event shall CDI be liable to anyone for special,
incidental or consequential damages.
CDI 5400 Flowmeter
Installation and Operating Instructions
Application
The meter may be used with either compressed air or Nitrogen, at pressures
from atmospheric to 200 psig. The air or Nitrogen must be free of oil and
suspended water droplets. In a compressed-air system, the meter should be
downstream of a dryer. Refer to the data sheet for the calibrated range of the
particular meter. The meter will continue to read at much higher flow rates, but
there may be significant inaccuracy
Location
The meter must not be installed in a hazardous location. If it must be installed
where it could be exposed to moisture, consult CDI about weather-resistant
modifications. For best accuracy, the meter should be installed with at least 20
diameters of straight pipe upstream and three diameters downstream. Avoid
installing the meter downstream of any item that could distort or concentrate the
flow, such as a partially-closed valve, a regulator, a filter or moisture separator,
two closely-spaced elbows in different planes, a long-radius elbow, an increase
in pipe size or a curved hose. Allow at least 30 diameters of straight pipe
between any such item and the meter. Select a location that meets these
requirements and also provides good visibility from the plant floor.
Preparing the Holes
When the holes are drilled, metal shavings will enter the pipe. Make sure that
filters or other provisions are present downstream to prevent the shavings from
damaging equipment or product or being blown out and causing injury.
Shut down the air and make sure that it will remain shut off while the meter is
being installed. Before starting to drill the holes, make sure that the air pressure
is completely bled down. For the larger size meters, the drill guide is a half ring
with two drill bushings mounted in it. Secure this half ring in place by bolting it to
the back half ring that came with the meter. For the smaller meters, the drill guide
is an aluminum block with two drill bushings. Secure this block to the pipe with a
C clamp, a band clamp or a chain clamp. A universal drill guide, similar to the
small drill guide, is also available that can be used with all meter sizes. After
mounting the drill guide, drill the holes, remove the drill guide, and remove any
burrs that were formed when you drilled the holes.

Installing the Meter
Make sure the probes are clean. If there is any oil or dirt on them, clean them
with alcohol or a similar degreaser. If the housing must be rotated to suit the
installation, loosen (do not remove) the two small cap screws in the plate
beneath the housing, rotate the housing, and tighten the screws. Insert the
probes into the holes in the pipe, with the flow arrow pointing in the direction of
flow. Tighten the screws carefully, alternating screws, so that the two sides of the
collar are pulled together evenly. If the LED display is upside down, remove the
cover of the meter, rotate it and the display panel 180 degrees, and reinstall the
cover. If the yellow caution label is not visible, apply the extra caution label from
the bag of parts in a visible location.
Wiring the Meter
POWER
Either use the 18-Volt dc wall-plug supply provided with the meter, or connect a
24-Volt dc supply to the DC- and DC+ terminals. The DC- terminal is connected
to the pipe on which the meter is mounted.
REMOTE DISPLAY
If you are using Summing Remote Display, connect the DC-, DC+ and display
terminals in the display to the corresponding terminals in the meter. The meter
may be powered from the remote display if the connecting cable is 22 gauge or
larger and the distance is no greater than 60 feet.
MILLIAMP OUTPUT
The mA- and mA+ terminals are optically isolated from the remainder of the
circuit and may be wired as part of an externally-powered loop. When this is
done, the jumper that is supplied with the meter must be removed. If you use an
external supply, be sure that it has sufficient voltage to overcome an 8.2 Volt
drop within the meter in addition to any other voltage drops in the loop. Powering
the milliamp circuit from an external supply does not provide power to the meter
itself. The meter must be powered from its wall-plug supply or a separate 24 Volt
dc supply.
Alternatively, the meter’s supply may be used to power the milliamp signal.
Leave the jumper in place from the DC+ terminal to mA+. Wire from the mA-
terminal to the positive side of the external receiver and from the negative side of
the external receiver to the DC- terminal. Power the meter from its wall-plug
supply or a 24V dc supply. Note that the DC- terminals are connected to the pipe
on which the meter is mounted.
©Copyright 2006 - 2010 CDI Meters, Inc. 07.10
PULSE OUTPUT
The pulse output is an open-drain output, that is, a transistor switch connected to
the meter’s negative supply. To use the output, connect it to an input of the
receiving device (usually a counter or PLC) and connect a pullup resistor from
that input to a positive supply suitable for the receiving device. Also connect the
negative supply terminal of the meter to the negative supply of the receiving
device. If an isolated relay contact is required, install the CDI 5200-IPO isolated
pulse output and wire it to the receiving device.
SERIAL COMMUNICATION OPTION
The RS-485 signal used with the Serial Communication option is wired to the
special Serial Communication display board. The two threaded openings in the
meter enclosure permit the signal to be wired from meter to meter without
external splices. Please refer to the data sheet for the Serial Communication
option.
Using the Outputs
The milliamp output is scaled so that four milliamps corresponds to zero flow and
20 milliamps corresponds to a flow rate that is above the calibrated range. The
flow rate that corresponds to 20 milliamps is displayed for a few seconds each
time the meter is powered up.
The pulse output generates a square wave signal, sending five pulses for each
cubic foot of air that passes through the meter. The LED blinks with the pulse
output. At zero flow it may be on or off.
Maintenance
If oil or dirt accumulates on the probes, the meter will read low. For this reason,
we recommend cleaning the probes from time to time. To clean the probes, wipe
them with a cloth dampened with alcohol or a similar degreaser. It may be found
that the system is clean enough that cleaning is not needed.