Ametek Drexelbrook 505-1320 Series User manual

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Installation and
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Series 505-1320
Continuous Ultrasonic Transmitter
using 405-1302 Electronics
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AMETEK Drexelbrook makes no warranty of any kind with regard to the material contained
in this manual, including, but not limited to, implied warranties or fitness for a particular
purpose. Drexelbrook shall not be liable for errors contained herein or for incidental or
consequential damages in connection with the performance or use of material.
Copyright 2002 AMETEK Drexelbrook

EDO # 12-02-243
505-1302-LM
Series 505-1320
Continuous Ultrasonic Transmitter
using 405-1302 Electronics
205 Keith Valley Road Horsham, PA 19044
US Sales 1-800-553-9092
24 Hour Service 1-800-527-6297
International + 215-674-1234
Fax + 215-674-2731
E-mail drexelbrook.inf[email protected]
Web www.drexelbrook.com
An ISO 9001 Certified Company
DREXELBROOK

EDO# 12-02-243
505-1302-LM
Table of Contents
SECTION 1 - INTRODUCTION ........................................................................................1
1.1 Product Description ................................................................................................1
1.2 Models Available....................................................................................................1
1.3 Models Available....................................................................................................1
1.4 Types of Flumes and Weirs .................................................................................... 2
SECTION 2 - INSTALLATION.........................................................................................4
2.1 Unpacking ..............................................................................................................4
2.1 MountingInstrument ...............................................................................................4
2.2 Wiring .....................................................................................................................7
SECTION 3 - OPERATION...............................................................................................10
3.1 Modes of Operation ................................................................................................10
3.2 Indicators and Controls...........................................................................................10
3.3 Time Delay .............................................................................................................12
3.4 Step Gain Switch....................................................................................................12
SECTION 4 - CALIBRATION ........................................................................................... 13
4.1 Introduction.............................................................................................................13
4.2 Primary Device Selection .......................................................................................13
4.3 Standard Calibration...............................................................................................15
4.4 Secondary Calibration............................................................................................ 16
4.5 Setpoint Calibration................................................................................................17
4.6 Accessory Packages ..............................................................................................18
4.6.1 401-600 Series Relay Package ...................................................................18
4.6.2 Sta-Dry™ Option (Modification 9128) ..........................................................23
4.6.3 Universal Process Meter (401-90X-2)..........................................................24
SECTION 5 - TROUBLESHOOTING................................................................................ 26
5.1 Checking the Transducer .......................................................................................26
5.2 Checking the Temperature Sensor.........................................................................26
SECTION 6 - CUSTOMER ASSISTANCE....................................................................... 29
6.1 Factory Assistance .................................................................................................29
6.2 Field Service ..........................................................................................................29
6.3 Customer Training..................................................................................................29
6.4 Equipment Return...................................................................................................29
SECTION 7 - SPECIFICATIONS ..................................................................................... 31
7.1 Transmitter Specifications ......................................................................................31
7.2 Transducer Specifications ......................................................................................31

1
505-1320 Series Ultrasonic Open Channel FlowmeterTM
SECTION 1
INTRODUCTION
1.1 Product Description
1.2 Technology
1.3 Models Available
The Drexelbrook Series 505-1302 Open Channel Flowme-
ter accurately measures continuous open channel flow up
to a range of 99.9 inches, using ultrasonic technology. The
flowrate output is a 4-20 mA dc signal.
Ultrasonic sensor is made of CPVC, Teflon and 316 SS or Teflon
SealtyteTM for compatibility with wide range of process materials.
Ultrasonictransmitterswork on theprincipleof sending a
pulsed, high-frequencysound wave from a peizo electric
transducer to the contents of the vessel. The device mea-
sures the length of time it takes for the reflected sound
wave to return to the transducer. A successful measure-
ment depends on reflection from the process material in a
straight line back to the transducer.
Thetwobasic modes ofoperation are the “deltalevel” and
“deltadistance.” Inthe delta levelmode, the current output
(4-20 mA dc) increases as the liquid level rises. In the delta
distancemode, thecurrentoutputincreasesas thelevel falls
(distancetothetransducer increases). Thedesiredspan
range may be set from a minimum of 3 inches up to 30 feet.
To ignore obstructions in the channel, AutoprofilingTM
mapping has been developed, which allows a “sonic snap-
shot” of an empty channel. The transducer transmits a
sound burst and the echo is recorded as a signature of the
channel bottom and sides. Any obstructions will send an
echo and create a profile. Later on, this signature or profile
is locked into the ultrasonic unit’s memory so it will not
respond to echoes created by these obstructions.
5 0 5 - 1 3 2 0 - X 0 X Continuous Open Channel
Flowmeter System
Transducer Material:
2 - CPVC
6 - Teflon and 316 SS
7 - SealtyteTM
Configuration options:
0 - Integral Electronics
7 - Remote Electronics
Electronic Unit:
2 - Adjustable Gain Electronic Unit
4 0 5 - 1 3 X 2 - 0 0 1 - X 0 Continuous Open Channel
Flowmeter Electronic Unit
Input Power: Relay Drivers:
0 - 120 Vac 2 - two
1 - 24 Vdc 4 - three
1 - 24 Vdc
3 - 240 Vac

2
505-1320 Series Ultrasonic Open Channel FlowmeterTM
1.4 Types of Flumes&Weirs
Figure 1-3
Cipoletti Weir
Figure 1-2
Rectangular Weir
Figure 1-1
Parshall Flume
Figures 1-1 through 1-8 show the 505-1302 Ultrasonic
Open Channel Flowmeter mounted in different types of
flumes and weirs.
NOTE
The open channel flowme-
ter location is a function
of the primary measuring
device. Consult the flume/
weir manufacturer for the
proper sensor location.
NOTICE

3
505-1320 Series Ultrasonic Open Channel FlowmeterTM
Figure 1-4
V-Notch Weir
Figure 1-5
Palmer Bowlus Flume
Figure 1-6
Leopold Lagco Flume
1.4 Types of Flumes&Weirs
(continued)
NOTE
The open channel flowmeter
location is a function of the
primary measuring device.
Consult the flume/weir
manufacturer for the proper
sensor location.
NOTICE

4
505-1320 Series Ultrasonic Open Channel FlowmeterTM
Carefully remove the contents of the shipping carton and
check each item against the packing list before destroying
any packing material. If there is any shortage or damage,
report it to the factory immediately.
Refer to Figures 2-1 and 2-2 for mounting dimensions of
the integral and remote instruments, respectively.
••
••
•The Series 505-1302 Series transmitter is designed for
field mounting, but it should be mounted in a location
free from vibration, corrosive atmospheres, and any
possibility of mechanical damage.
••
••
•For convenience at start-up, place the instrument in a
reasonably accessible location. Ambient temperature
should be between -40oF and 160oF (-40oC to 70oC).
••
••
•The 505-1302 Series transmitter is available with the
electronic unit and transducer as either a single inte-
gral assembly or separated by two coaxial cables in the
remote configuration.
••
••
•The transducer must be mounted vertically in either
configuration.
••
••
•Extended sensor lengths and special mountings can be
provided to fit specific mounting applications.
••
••
•When mounting the transducer, consideration must be
given to the 12-inch Near Zone. If the level rises to
within 12 inches of the sensor face, a 20 mA signal is
generated; the Near Zone LED lights; and the Near
Zone Alarm Output drops from 24 Vdc to 0 Vdc.
••
••
•The typical conical beam angle of the ultrasonic signal
is 10-12 degrees. Therefore, it is necessary to ensure
that a channel wall, ladder, or other obstruction is not
within this beam, and is not causing erroneous reflec-
tions that can affect the system operation.
••
••
•An optional mounting kit (285-1-176) is available for
both integral and remote mounted units. The
mounting stand is used to hold the unit in place
above the flowstream. The mounting kit moves
vertically and horizontally for maximum placement.
SECTION 2
INSTALLATION
2.1 Unpacking
2.2 Mounting Instrument

5
505-1320 Series Ultrasonic Open Channel FlowmeterTM
Figure 2-1
Mounting Dimensions
Integral Unit
2.2 Mounting Instrument
(continued)

6
505-1320 Series Ultrasonic Open Channel FlowmeterTM
Figure 2-2
Mounting Dimensions
Remote Unit
2.2 Mounting Instrument
(continued)

7
505-1320 Series Ultrasonic Open Channel FlowmeterTM
2.3 Wiring CAUTION
If the Series 505-1302 is located in a hazardous environ-
ment, do not open enclosure cover or make/break any
electrical connections without first disconnecting electri-
cal power at the source. Ensure that wiring, electrical
fittings and conduit connections conform to electrical
codes for specific location and environment.
Refer to Figures 2-4 and 2-5 for the wiring diagram of the
505-1302 integral and remote instruments, respectively.
For integral transmitters, the level measuring cable and
temperature compensation wires are prewired.
••
••
•Connect input power and output leads to terminal block
(TB1) as shown.
••
••
•The 505-1302 is shipped with the Output Select jumper
block set to Source output (the instrument supplies 24 Vdc
power to the signal loop). If an external power supply is
used, the jumper should be moved to Sink output position.
See Figure 2-3 for an example of a loop wiring diagram.
••
••
•For loop wiring, it is recommended to use twisted, shielded
pair to eliminate noise. The shield or drain wire should be
grounded at the power supply end and left floating at the
ultrasonic transmitter end.
Figure 2-3
Output Select Jumper

8
505-1320 Series Ultrasonic Open Channel FlowmeterTM
Figure 2-3
Wiring Diagram of Line-Powered Transmitter
2.3 Wiring (continued)

9
505-1320 Series Ultrasonic Open Channel FlowmeterTM
Figure 2-5
Wiring Diagram of 24 Vdc Transmitter
2.3 Wiring (continued)

10
505-1320 Series Ultrasonic Open Channel FlowmeterTM
SECTION 3
OPERATION
3.1 Modes of Operation
3.2 Indicators & Controls
When using the 505-1302 Open Channel Flowmeter, there
are two modes of operation: flow or distance mode.
••
••
•In the flow (or level) mode, the current output (4-20 mA)
increases as the liquid level rises.
••
••
•In the distance mode, the current output increases as the
level falls (distance to the transducer increases).
••
••
•The desired span range may be set from a minimum of 3.0
inches up to 87.9 inches (99.9 inches minus 12-inch near
zone).
Refer to Figures 3-1 and 3-2 for the location of indicators and
controls.
—SW8 Flow or Distance Mode
Normal operation, and the selection of either flow or distance
mode is accomplished by changing the position of switch 4 on
SW8. See Section 3.1 Modes of Operation.
—Time Delay Control
The time delay control is located above SW8. A zero-second
time delay (position 2) is the default selection that is set at the
factory. Position 4 sets a 15-second time delay. Position 1 sets
a 45-second time delay.
—Zero and Span Calibration Switches
The zero and span are each set using three, ten-position
rotary switches. Zero and span settings are made in inches
with 0.1-inch resolution. Zero and span switches are used to
calibrate the unit. See Section 4.2 Standard Calibration.
—LED Indicators
Two LED indicators are located on the transmitter to alert the
user to a near zone or lost echo fault condition or improper
calibration.
—Calibration Pushbutton
The calibration pushbutton is used in conjunction with SW8
for maximum calibration accuracy. See Section 4.4 Secondary
Calibration. This button can also be used as a system reset.
—Flow Switches
Three, ten-position rotary switches are used to set the type
and size of the flume or weir. The top switch sets the type and
the two lower switches set the flume or weir size in degrees or
inches. See Section 4.2 Primary Device Selection.

11
505-1320 Series Ultrasonic Open Channel FlowmeterTM
—Alarm Relays
Outputs for Near Zone and Lost
Echo are provided to activate
external relays or alarms. These
are separate relay packages
purchased as an option.
—Step Gain Switch
Changes the gain of the ultra-
sonic transmitter to lessen any
effect due to noise or obstruction.
3.2 Indicators & Controls
(continued)
Figure 3-2
Operating Mode and Calibration
Switches
Figure 3-1
Switch 8-Flow and Distance Mode

12
505-1320 Series Ultrasonic Open Channel FlowmeterTM
Increasing time delay to either 15 or 45 seconds will smooth
out a jumpy output signal caused by wave action or turbu-
lence.
The step gain switch can be used to decrease the acoustic
signal and avoid noise interference. See Figure 4-4 for the
location of the step gain switch.
The standard instrument is capable of shooting to a distance
of 40 feet. Most open channel flow installations shoot a dis-
tance of less than 36 inches. The excess power can cause
measurement inaccuracies due to the 12 degree beam angle.
On small throat width Parshall flumes (1,2, and 3-inch), the
acoustic signal hits the sidewall of the flume. Any slime or
surface irregularities sends a false signal back to the receiver.
By reducing the gain of the transmitter (using the step gain
switch) the measurement inaccuracies can be eliminated.
The factory setting is position 3.
This setting should be adequate for most applications.
If false high readings occur, decrease the gain.
If loss of echo occurs, increase the gain.
Step Gain Switch
6 100% gain
5 84 % gain
4 67% gain
3 50% gain
2 32% gain
1 17% gain
8% gain
NOTE
If the step gain is adjusted, the instrument should be
recalibrated using the secondary calibration procedure
described in Section 4.4 Secondary Calibration.
3.3 Time Delay
3.4 Step Gain Switch
NOTICE

13
505-1320 Series Ultrasonic Open Channel FlowmeterTM
NOTE
If type 0 (linear) is selected, set both
switches for primary device size to
zero (0).
The 505-1302 Series transmitter must be set for the type and size
of the primary device and the actual zero and span values for the
specific application. This procedure is outlined in Sections 4.1
through 4.3. After standard calibration, the flowrate reading
should be approximately within the 0.5% accuracy specification.
Use this procedure to select the type and size of the
primary device. See Figure 4-1 and Table 4-1.
a. With the power off, select the Type of Primary Device
switch for the specific type of flume or weir.
0 - Standard (linear)
1 - Parshall Flume
2 - Rectangular Weir with End Contractions
3 - Rectangular Weir without End Contractions
4 - Cippoletti Weir
5 - V-Notch Weir
6 - Leopold Lagco Flume
7 - Palmer Bowlus Flume
b. Now set the Size of Primary Device switch in inches
(or degrees for V-notch weir applications). The middle
switch represents the tens and the lower switch
represents the units. For example, 36 inches is set
3 for tens and 6 for units.
SECTION 4
CALIBRATION
4.1 Introduction
4.2 Primary Device
Selection
NOTICE
NOTICE
Primary Device Valid Sizes
Parshall 1" 2" 3" 6" 9" 12" 18" 24" 30" 36"
48" 60" 72" 96" c
Rectangular
Weir with 12" 18" 24" 30" 36" 48" 60" 72" 96"
End Contractions (greater than 96", set to 96")
Rectangular
Weir without 12" 18" 24" 30" 36" 48" 60" 72" 96"
End Contractions (greater than 96", set to 96")
Cipoletti Weir 12" 18" 24" 30" 36" 48" 60" 72" 96"
(greater than 96", set to 96")
V-notch Weir 22o (22.5o)30
o45o60o90o
Leopold-Lagco 4" 6" 8" 10" 12" 15" 18" 21" 24" 30"
Flume 36" 42" 48" 54" 60" 66" 72"
Palmer Bowlus 4" 6" 8" 10" 12" 15" 18" 21" 24" 27"
Flume 30" 36" 42" 48" 60" 72"
Table 4-1
Primary Device Selection
NOTE
When an invalid primary device
type or size is selected, Near
Zone and Lost Echo indicators
will flash. If this happens, enter
correct values or reset device
using calibration pushbutton
shown in Figure 3-2.

14
505-1320 Series Ultrasonic Open Channel FlowmeterTM
Figure 4-1
Flow and Relay Switches