How it Works
Dwyer
Loading...
RTI
User Manual
7 pgs423.45 Kb0

Dwyer RTI User Manual

Series RTI
RATE/TOTAL DISPLAY INSTRUCTIONS
F-RTI
TABLE OF CONTENTS
GENERAL INFORMATION
General Information
Installation
Connection Diagrams
(Quick) Settings
Settings
Operation
Troubleshooting
The Series RTI ow displays are microcontroller-based indi­cator/transmitters that show ow rate and total and provide
output signals. The RTI is powered by external DC voltage and has both pulse and 4 to 20 mA analog outputs. When the RTI is being used in the 4 to 20 mA mode, it is a “two-wire” or “loop-powered” device, meaning that the 4 to 20 mA output signal doubles as its power supply.
The addition of a dual-relay output board allows for certain applications requiring contact output isolation (e.g., certain metering pumps and water treatment controls). Dual solid state relays provide exactly the same pulse output as the standard unit, and each can signal one external device. A non-resettable total is also available. The RTI can be ordered in a plastic enclosure with a 115 VAC power supply for use with mechanical meters, or with a built-in 115 VAC/12 to 24 VDC dual power supply for magmeters.
FEATURES
Electronics Module Display
Setup Keys**
The RTI can be factory-mounted on the meter (-M) or remotely wall mounted with the brackets provided (-W). The RTI is also available as a panel mount (-P) with an open back for easy installation in the user’s own electrical enclosure. Most RTI’s can be converted from wall-to-meter or meter-to-wall mount
congurations after installation if needed.
Housings for the -W and -M models are rugged cast aluminum, potted and gasketed for maximum environmental protection. A membrane keypad allows settings to be changed without removing the cover. (Password protection, a standard feature, can be used to prevent settings from being changed.)
**Includes password protection for tamper prevention when needed
TABLES AND DIAGRAMS
Cover Screws
Lower Housing
Strain Relief
Wall-Mount Brackets
SPECIFICATIONS*
Power
Display Rate
Total
Outputs Current Sinking Pulse
Analog
Pulse Output Range
Input
Input Range
K-Factor Range
Flow Alarm Output Range
Operating Temperature
Environmental
**Includes password protection for tamper prevention when needed
RTI
12 to 30 VDC, 4mA (4 to 20 mA when loop-powered)
6-digit autorange, 1/2" character height
8-digit, 5/16" character height
Scaled Pulse output (0.1 sec duration 6.1 Hz max), or (High Alarm output or Low Alarm output)
Sensor pass-through Pulse output (unscaled)
4 to 20 mA loop; 24 to 30 Vdc
0.1 - 9999999.9 units/pulse
5V pulse or contact closure
1.0 - 1,500 pulses/second
.001 - 99999.999
.01 - 999999.99
-30 to 65˚ C (-22 to 148˚ F)
NEMA 4X, IP66
*Specications subject to change
Page 1
INSTALLATION
INSTALLATION
Wall Mount. To mount a Series RTI display to the wall, hold the
unit in the desired position, mark the holes in the mounting feet, drill and mount with screws. With the RTI-W-VPS option
(Built-in 115 VAC power supply), rst remove the front cover
to gain access to the mounting screw holes.
A meter-mounted RTI Series can be converted to a wall mount using an MMK mounting kit offered in our Series FPCA.
Meter Mount. If the Series RTI display was ordered as an -M
model, the housing is made to be directly mounted to the ow
sensor and therefor needs no further installation.
An RTI Series module can be converted from a wall-to a meter­mount using the WMK adapter kit fouund in Series FPCA that includes a lower housing and associated hardware. This can be accomplished as follows:
1) Remove the strain relief through which the ow sensor
cable runs.
2) Cut the cable to about 6” in length. Carefully strip the cable jacket to expose the three colored wires (red, white, and black) inside.
3) Route the wires through the threaded connector pre-installed in the bottom of the housing.
4) Start the threaded connector into the female thread on
the top of the ow sensor. Be sure to match the
oblong shape on the bottom of the housing to the
depression on the top of the ow sensor.
5) Using an ordinary screwdriver inserted in one side of the slot (see drawing), tighten the screw as much as possible.
6) Strip the wire ends, make the connections to the RTI Series display as shown in Connections Diagrams, and then use the cover screws to attach the display to the top of the housing.
Panel Mount. Using the “Panel Cut out” drawing as a guide, cut a square hole in the panel. Remove the clamps from the back of the RTI-P and insert the display unit through the cutout, taking care that the panel sealing gasket is in place between
the front of the panel and the ange of the display. Hold the
display in place while starting the screw of one of the two clamps. Finger tighten the screw, then install the other clamp.
When both are in place, rmly tighten the clamps with a small
wrench or nut driver.
Sensor Wires
Meter Mount
Sensor Wires
Panel Mount
Connections. To connect the Series RTI ow display to a ow
sensor or an external device such as a chemical metering
pump, follow the Standard Connections diagrams on pages
4 thru 6.
If the RTI's 4 to 20 mA current signal is not required, connect
the power terminals to any 12 to 30 VDC voltage source.
Dual Relay Output (Option -DRO). If you purchase the RTI with
option -DRO, the required component will come preinstalled,
and no extra procedures are required.
If you are retrotting an existing installation of an RTI with the
dual relay board, please follow the instructions below:
1) Peel the backing off of the double-stick tape and afx
it to the bottom of the relay board.
2) Carefully attach the board to the RTI as shown in
the connection diagram on page 5. Be sure that the
red wire faces the “Sensor Input” side of the RTI, and
that the white wire faces the “Pulse Output” side.
3) Connect the white wire to the “Pulse Scaled” positive
terminal, and the red wire to the “Power 4 to 20 mA”
positive terminal.
4) Connect devices to the relays as desired.
-DRO Relay Board Specications
Output Voltage 0 to 130 VAC/DC
Output Current (each output)
Temperature 50˚ C 85˚ C
Current Limit 100 mA 50 mA
Max Pulses/Second 5
Contact Time Per Output 100 ms
Caution: If output is being used to control an external device, such as a metering pump, do not connect the de­vice until programming is completed. If malfunction or incorrect program-
ming of the output could cause per­sonal injury or property damage, separate safeguards must be installed to prevent such injury or damage.
Page 2 Page 3
Loading...
+ 4 hidden pages
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use