AW-Lake RT-30, RT-30EX Operating Manual
COMPANY
RT-30EX Flow Transmitter
Installation, Operating &
Maintenance Manual
©2016 AW-Lake Company. All rights reserved. Doc ID:RT30E XMAN082416
Table of Contents
Safety Denitions and Information ....................................................... 3
Unpacking ..................................................................................................... 3
Product Description ................................................................................... 3
Screen selection and programming changes ............................................ 3
Hazardous Area Installation Instructions ............................................ 4
Technical Specications ............................................................................ 5
Connections ................................................................................................... 6
Main board layout Maximum wire gauge: 12 AWG .................................. 8
Analog output ................................................................................................ 9
Limit & frequency output ............................................................................. 9
Reset input ..................................................................................................... 9
Run Mode Screens.......................................................................................11
Control Functions........................................................................................15
Programming ............................................................................................... 17
Entering programming mode ...................................................................... 17
Changing values and making selections .................................................... 17
K-factor (scaling factor) ................................................................................ 18
RATE unit ........................................................................................................ 18
RATE time base .............................................................................................. 18
TOTAL unit ..................................................................................................... 19
Analog output scaling ................................................................................... 19
Frequency output programming ................................................................ 26
Gate Time lter .............................................................................................. 26
Calibrating Analog Output ....................................................................... 28
I/O Manual Adjustment............................................................................. 29
Analog output adjustment ........................................................................... 30
Fine mA adjustments .................................................................................... 30
Limit & frequency adjustment ..................................................................... 31
Fine limit output adjustments ..................................................................... 31
Coarse limit output adjustment .................................................................. 31
ON/OFF Limit output adjustment ............................................................... 32
Monitor external reset input ....................................................................... 32
Appendix A - Physical Dimensions .......................................................... 33
Appendix B - Physical Dimensions .......................................................... 35
Limited Warranty ....................................................................................... 36
2
Safety Denitions and Information
Do not attempt to install or use your AW Gear Meters product until you have read
the safety instructions in this section. Save this manual and keep it in an easily
accessible place.
WARNING means that failure to follow this safety statement may result in
extensive product damage, serious personal injury, or death.
CAUTION means that failure to follow this safety statement may result in minor or
moderate personal injury, property or equipment damage.
NOTICE is a statement that informs about installation, operation, maintenance,
performance issues, or general tips that are important but do not create a hazard
or safety concern.
Unpacking
Separate the RT-30EX Flow Transmitter from packaging materials and check
for any visual signs of damage. If you determine there are damages caused by
shipping, file a claim with the shipping company. If the flow transmitter appears
to have been improperly assembled or does not operate properly, return it
for replacement or repair (see Limited Warranty information at the end of this
manual).
CAUTION: Before connecting, programming, or operating the RT-30EX Flow
Transmitter, read this manual.
Product Description
The RT-30EX is a digital flow transmitter housed in an epoxy painted aluminum
instrument enclosure. The RT-30EX is certified for use in Class I, Div 1
hazardous areas in both Canada and the US, and Ex d IIB and Ex tb IIIC in the
EU. The unit’s graphical, backlighted LCD display makes it easy to monitor flow
rate and total in user selectable engineering units. The sensor used with the unit
will mount on many meter models modified for use with the 3/8” NPT sensor
mounting thread. Meter model available are the JVM, JVS, JVHS and ZHM gear
meters and HM high pressure turbines.
Screen selection and programming changes
You can make program or mode changes, or reset the totalizer in two ways;
1. With the housing cover removed, enter information using the 4 pushbuttons.
2. With the housing cover closed, hold the attached magnet wand against the
3
side of the cover to activate hall switches located on the internal circuit
board.
You can also reset the totalizer and monitor flow rate limits and total output
remotely via a computer or PLC.
Figure 1: Hazardous area certification tag CSA (left) and ATEX / IECEx (right)
Hazardous Area Installation Instructions
The RT-30EX unit is an explosion-proof flow transmitter with local display suitable for
use in Class I, Div 1 North American locations or Ex d IIB and Ex tb IIIC European
locations, depending on the model labeling.
Above are two samples of the name plate that should be clearly attached to each
unit. Please make sure the appropriate name plate is on the unit and that the
information matches what is shown above to your desired certification, prior to
installation. If either the name plate is not on the unit or the unit name plate does
not match what is shown above, please notify AW- Lake Company to determine
appropriate course of action.
WARNING: Because the RT-30EX uses an explosion-proof enclosure for its area
protection, power must be removed from the unit before the covers are removed
while in a hazardous area. Also, disconnect power before loosening or adjusting
the swivel collar on the hub adapter.
For proper installation, it is also necessary that the conduit entries are properly
sealed. To maintain the unit’s explosion-proof certification, anything threaded into
the NPT conduit openings must engage by a minimum of 5 full threads. If original
units received from AW-Lake Company are versions which have the sensor
installed, this sensor will be properly installed with a minimum of 5 full threads of
engagement from the factory.
When an RT-30EX is installed into the flow meter with which it is to be used, it is
also necessary to make sure there is a minimum of 5 full threads of engagement
4
between the meter and RT-30EX unit.
When wiring the unit, please make sure to observe any local codes that
may be required. A common requirement is to have a conduit seal within 18
inches of the unit. Also, the unit may be used in a Class I, Div. II area, but
must still be installed according to Class I, Div I standards. Make sure units
are powered by a Class 2 power supply for proper regulation.
Please note that the RT-30EX must be installed properly into a flow meter
before power is applied.
Technical Specications
Power Requirement:
9-24 VDC / 200mA (customer
supplied) Class 2
Analog Output 4-20mA
3- or 2-wire plus separate supply
Max load impedance 500 ohm
Frequency Output
Three Opto-Isolated OpenCollector Outputs
• Frequency or limit outputs
• 5-30 VDC rating
• 40 mA max (min. load
impedance required 600 Ohm
@ 30 VDC)
Built in 30 point Linearizer
Temperature Rating
-20 to 60°C (-4 to 140°F)
Sensor/Monitor Frequency
Range
0-4,500 Hz
Connection
3/4” female NPT conduit provisions
One Opto-Isolated Input
9-24 VDC remote reset
cCSAus Certification
• Class I, Div. I, Groups C, D
• Class II, Div. I, Groups E, F, G
• Class III
ATEX Certification
II 2 G, Ex d IIB+H2 T5 Gb,
Ta = -40°C to +60°C
IECEx Certification
Ex d IIB+H2 T5 Gb
Ta = -40°C to +60°C
5
Connections
On dual access enclosure versions, the hook-up board can be accessed by
removing the blind cover.
To get access to the hook-up board on the single access enclosure models, first
remove the cover and loosen the 4 stainless steel screws visible through the face
plate as shown in Figure 18. Note that the screws are captured on the back side
of the main display board and will not fall out. Carefully remove the main display
board. The hook-up board is located at the bottom of the enclosure as shown in
Figure 2 below.
Figure 2: Single access enclosure model, hook-up board location
To get access to the sensor wiring terminal which is located on the back of the
main display board, the same procedure must be followed for both the single and
dual access enclosure models. 10
RT-30EX User Manual, Rev. 1.9 07/17/2015
6
Hook-up board layout
Figure 3: Hookup board connection diagram
Maximum wire gauge: 16 AWG
Pin 1: (+) Reset
Pin 2: (-) Reset
Pin 3: (+) Frequency Out
Pin 4: (-) Frequency Out
Pin 5: (+) Supply Voltage
Pin 6: (-) Supply Voltage / Ground (Supply may be floating or jumpered
to housing ground, if needed, for noise reduction.)
Pin 7: Housing Ground
Pin 8: +Vcc
Pin 9: mA Loop Connection See Figure 5 & Figure 6 on page 12 for mA
signal polarity
Pin 10: mA Loop Connection
Pin 11: (+) Limit 1
Pin 12: (-) Limit 1
7
Pin 13: (+) Limit 2
Pin 14: (-) Limit 2
NOTE: See electrical specicaons page.
Main board layout Maximum wire gauge: 12 AWG
Figure 4: Main board input signal connection
Pin A: Magnetic Coil input
Pin B: Magnetic Coil input
Pin C: Ground
Pin D: High level pulse Input
Pin E: (+) 12Vdc Output for sensor supply
NOTE: See electrical specicaons page.
8
Analog output
The isolated 16-bit 4-20mA output can be wired for use with Loop powered
inputs or for ground referenced inputs. The analog signal has an LED in
series which varies in intensity as the mA signal varies. This can be used for
troubleshooting purposes.
When using the analog signal with inputs used with loop powered signals, it is
important to note that the RT-30EX still requires a separate power supply to
power the unit as shown Figure 5 below.
Figure 5: Loop powered analog output Figure 6: Ground referenced analog output
When using the analog signal with ground referenced inputs, jumper pins 8 and
9 together as shown in Figure 6 above. Analog signal is taken from pin 10 and
returns to pin 6 (supply ground).
Limit & frequency output
Three opto-isolated NPN open-collector outputs can sink or source depending
on connection. Attention must be paid to polarity of connections. See page 8
for electrical specification and page 10 for Limit 1, Limit 2 & Frequency pin-out
pairing.
Figure 7: Limit 1, Limit 2 & Frequency outputs
Reset input
Opto-isolated external reset input will trigger the RT-30EX to reset the totalizer
when the input sees a momentary transition from low (ground) to high (near
supply).
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Figure 8: External reset input
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Run Mode Screens
Figure 9: Run Mode Screens - overview
The run mode screens, as shown below, can be accessed by using the UP and
DN buttons or using theattached magnet wand to activate internal hall switches.
Logo screen shows critical information on
RT-30EX firmware version.
RATE screen shows active flow rate
information in programmed engineering
units.
TOTAL screen shows totalized volume in
programmed engineering units.
RT/TO screen shows both the flow
rate and total values in programmed
engineering units.
GRAND TOTAL screen shows totalized
volume in programmed engineering units
and is not affected if TOTAL is reset.
STATUS screen shows data summary.
Flow and total are in un-scaled units of
Hertz for flow and Pulses for total.
ANALOG OUT screen shows the mA value
the RT-30EX is outputting.
L1/L2 screen shows information for Limit
outputs.
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Figure 10. LOGO screen
The LOGO screen shows 3 or 4 lines of important data for the display unit which
is needed if contacting the factory for support issues.
1. Line 1 shows the basic model name.
2. Line 2 shows the unique serial number of the unit.
3. Line 3 shows the firmware version of the unit.
Figure 11. RATE screen
The RATE screen displays the flow rate in the programmed engineering units. If
the linearizer is active, ‘LN’ shows in lower left corner. If the Gate Time filter is
active, ‘GT’ shows in lower right corner.
Figure 12. TOTAL screen
The TOTAL screen displays the flow total in programmed engineering units.
Pressing the RESET button resets the value back to zero (0). The Total can also
be reset remotely by connecting a momentary voltage to the external RESET pin.
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