51-160.3 Echotel 961

Echotel ® Model 961
Ultrasonic Level Switches
for Hygienic Applications
D E S C R I P T I O N
Echotel® Model 961 Ultrasonic Level Switches use pulsed
signal technology for superior performance in
difficult process conditions, and to provide excellent
immunity from sources of electrical noise interference.
Extensive self-testing of the electronics and transducer
make this advanced switch suitable for a wide variety of
hygienic level switch applications.
Model 961 is offered with either a 5-amp relay or a current shift electronics. The relay output electronics has a
DPDT relay for level detection, and a SPDT malfunction
relay. The current shift version indicates 8 mA during normal operation, 16 mA as a level alarm condition and a
user-selectable 3.6 or 22 mA malfunction indication.
The Model 961 switches are designed for the stringent
requirements of hygienic applications. These switches are
offered with a deep-drawn 304 stainless steel housing that
is favorable to CIP and SIP procedures. A 20 Ra surface
finish is featured with hygienic Model 961 transducers.
These transducers are available with 11⁄2" and 2"
Tri-Clamp® fittings, and DN65 Varivent® Type N flanges.
Model 961
(with Varivent® fitting)
F E A T U R E S
• Self-test technology provides unsurpassed
reliability and testing of electronics, transducer,
piezoelectric crystals, and electromagnetic noise
• 20 Ra surface finish with Tri-Clamp and Varivent fittings
• Adjustable time delay for turbulent aerated liquids
• Tip-sensitive transducer measures level within 1⁄4" of
the vessel bottom
• Pulsed signal technology provides superior performance in difficult process conditions
Model 961
(with Tri-Clamp® fitting)
P U L S E D
S I G N A L
T E C H N O L O G Y
Model 961 switches use pulsed signal
technology to detect the presence or
absence of liquid in an ultrasonic transducer gap. The transducer uses a pair of
piezoelectric crystals that vibrate at a
given frequency when subjected to an applied voltage.
The transmit crystal converts the applied voltage from the
electronics into an ultrasonic signal. When liquid is present
in the gap, the receive crystal senses the ultrasonic signal
and converts it back into an electrical signal. This signal is
sent to the electronics to indicate a wet gap condition.
When no liquid is present, the ultrasonic signal is attenuated and is not detected by the receive crystal.
Ultrasonic
transducer
Transmit
crystal
Challenging process conditions like aeration, suspended
solids, and high viscosities are overcome by using pulsed signal circuitry in 961 switches. Unlike many tuning forks,
pulsed signal ultrasonic switches do not need to be configured for different media densities, making these units the
most universally applied level switches on the markey today.
ADVANCED
SELF-TEST
Ultrasonic switches are often used as the
last means of detecting whether a
cer
Transdu ls
ta
process vessel will overflow and cause a
s
& cry
s
ic
spill of potentially hazardous liquids, or
Electron
e
empty out and possibly cavitate the
Nois
pumps. In these critical applications it is
desirable to have a method of periodically testing the
ultrasonic switch to ensure that it is functioning properly.
Receive
crystal
Ultrasonic signal transmission
across transducer gap
AND
DIAGNOSTICS
A microprocessor in the 961 electronics continuously
monitors all self-test data. Should a fault occur, the microprocessor can determine whether the malfunction is due
to the electronics, transducer, piezoelectric crystals, or the
presence of environmental noise. A pushbutton and Fault
LED is used to assist in troubleshooting the switch:
5 One flash of the Fault LED indicates a problem
with the transducer or piezoelectric crystals
Model 961 switches feature an advanced self-test technology that not only tests the electronics, transducer, and
piezoelectric crystals, but also tests for the presence of
industrial sources of environmental noise. Should the
switch detect any problems a malfunction output is generated to alarm the user, and a red LED is lit to indicate
an alarm condition.
2
55 Two flashes of the Fault LED indicates a
problem with one of the electronics boards
555 Three flashes of the Fault LED indicates
excessive levels of environmental noise
ADJUSTABLE
TIME
DELAY
Turbulence and splashing can cause
some fixed time response switches to
produce false level alarms. Model 961
switches overcome this difficulty with an
adjustable
time
delay
feature.
A potentiometer allows a 1⁄2 – 45-second delay to be set to
disregard waves or splashes, and reliably detect the true
liquid level.
A P P L I C A T I O N S
Model 961 Switches may be used for high or low level
alarm, empty pipe detection and pump protection in a
wide variety of hygienic applications. Available with a
304 stainless steel electronics housing and a 20 Ra surface
finish transducer, typical applications include:
Fill Line
Spray Ball
High Alarm
• CIP/SIP day tank point level
• Water for Injection (WFI) storage
• Liquid chromatography skids
• Brewery fill lines
Pump
Protection
• Condensate receiver tanks
Low Alarm
3
E L E C T R O N I C S
M O D E L
9 6 1
S P E C I F I C A T I O N S
W I T H
Supply Voltage
Relay Outputs
Relay Ratings
R E L A Y
DPDT:
SPDT:
Fail-safe
Power Consumption
Ambient Temperature
M O D E L
9 6 1
W I T H
18 to 32 VDC, or 102 to 265 VAC, 50/60 Hz
One DPDT level relay and one SPDT malfunction relay
5 amps @ 120 VAC, 250 VAC, and 30 VDC, 0.4 amp @ 110 VDC
5 amps @ 120 VAC, 250 VAC, and 30 VDC, 0.15 amp @ 125 VDC
Selectable for high or low level
Less than 3 watts
-40° to +160° F (-40° to +70° C)
C U R R E N T
Supply Voltage
Current Shift Output
S H I F T
O U T P U T
12 to 35 VDC
8 mA normal operation, 16 mA level alarm (±1 mA)
3.6 mA or 22 mA selectable fault signal (±1 mA)
104 ohms with 12 VDC input, 1100 ohms with 35 VDC input
Selectable for high or low level
Less than 1 watt
-40° to +160° F (-40° to +70° C)
Loop Resistance
Fail-safe
Power Consumption
Ambient Temperature
T R A N S D U C E R
Operating Temperature
Maximum Pressure
O U T P U T
S P E C I F I C A T I O N S
Operating Frequency
Surface Finish
-40° to +325° F (-40° to +163° C)
2000 psi (138 bar)
1500 psi (103 bar)
2 MHz
20 Ra (when ordered with 4th digit code S)
P E R F O R M A N C E
S P E C I F I C A T I O N S
Repeatability
Response Time
Time Delay
Self-Test
1" and 2":
3" to 130":
Automatic:
Manual:
Shock Class
Vibration Class
Humidity
Electromagnetic Compatibility
4
±0.078" (± 2 mm)
⁄2 second typical
Variable 0.5 – 45 seconds on rising and falling levels
Continuously verifies operation of electronics, transducer,
piezoelectric crystals, and electrical noise
Push button verifies operation of electronics, transducer,
and piezoelectric crystals
ANSI/ISA-S71.03 Class SA1
ANSI/ISA-S71.03 Class VC2
0-99%, non-condensing
Meets CE requirements EN 61326
1
D I M E N S I O N A L
I N C H E S
S P E C I F I C A T I O N S
( m m )
5.24
(133)
5.24
(133)
5.75
(146)
5.75
(146)
1.05 (26)
Typical
2.70 (69)
Typical
Actuation length
with Tri-Clamp fitting
Actuation length
with Varivent fitting
0.25 (6)
∅ .875 (22)
0.25 (6)
∅ .875 (22)
Model 961
with Tri-Clamp® fitting
Model 961
with DN65 Varivent® Flange
5
M O D E L
9 6 1
N U M B E R
E L E C T R O N I C S
BASIC MODEL NUMBER
961
Relay or current shift electronics
INPUT POWER
2
5
7
18–32 VDC line-powered
12–35 VDC loop-powered
102 to 265 VAC line-powered
OUTPUT SIGNAL
0
D
mA current shift (available with Input Power code 5)
5-amp gold flash relays (available with Input Power codes 2 or 7)
COVER
0
1
Standard cover
Glass window cover
MOUNTING
0
Integral
AGENCY APPROVAL
7
FM/CSA Non-incendive (available with Output Signal
codes 0, 8 & D and Housing codes 4 & 5)
HOUSING & CONDUIT CONNECTION
4
5
9
6
6
1
A
0
7
Deep drawn 304 stainless steel
w/ 1⁄2" NPT dual conduit entries
Deep drawn 304 stainless steel
w/M20 dual conduit entries
M O D E L
9 6 1
N U M B E R
S I N G L E
P O I N T
T R A N S D U C E R
TRANSDUCER UNIT OF LENGTH
A
M
English (length in inches)
Metric (length in centimeters)
MATERIALS OF CONSTRUCTION
S
316/316L with 20 Ra hygienic finish (use only with Process Connection codes 3T, 4T, or VV)
PROCESS CONNECTIONS
3T
4T
VV
11⁄2" Tri-Clamp® 16 AMP fitting
2" Tri-Clamp® 16 AMP fitting
DN65 – Varivent® Type N flange
ACTUATION LENGTH (unit of length specified in second digit)
2" to 130" in 1" increments
Example: 4 inches = 004
5 cm to 330 cm in 1 cm increments
Example: 6 centimeters = 006
9
1
A
7
Q U A L I T Y
The quality assurance system in place at
Magnetrol® guarantees the highest level of
quality throughout the company. MAGNETROL
is committed to providing full customer
satisfaction both in quality products and
The MAGNETROL quality assurance system is
registered to ISO 9001 affirming its commitment
to known international quality standards
providing the strongest assurance of product
and service quality available.
quality service.
E S P
Expedite
Ship
Plan
Several ECHOTEL Model 961 units are available
for quick shipment, usually within one week
after factory receipt of a complete purchase
order, through the Expedite Ship Plan (ESP).
ESP service may not apply to orders of ten
units or more. Contact your local representative for lead times on larger volume orders, as
well as other products and options.
To take advantage of ESP, simply match the
color coded model number codes (standard
dimensions apply).
W A R R A N T Y
All MAGNETROL electronic level and flow
controls are warranted free of defects in materials or workmanship for one full year from
the date of original factory shipment.
If returned within the warranty period; and,
upon factory inspection of the control, the
cause of the claim is determined to be covered
under the warranty; then, MAGNETROL will
repair or replace the control at no cost to the
purchaser (or owner) other than transportation.
MAGNETROL shall not be liable for misapplication, labor claims, direct or consequential damage or expense arising from the
installation or use of equipment. There are
no other warranties expressed or implied,
except special written warranties covering
some MAGNETROL products.
For additional information, see Instruction Manual 51-646.
705 Enterprise Street • Aurora, Illinois 60504-8149 • 630-969-4000 • Fax 630-969-9489
[email protected] • www.magnetrol.com
Copyright © 2013 Magnetrol International, Incorporated. All rights reserved. Printed in the USA.
Performance specifications are effective with date of issue and are subject to change without notice.
Magnetrol, Magnetrol logotype and Echotel are registered trademarks of Magnetrol International, Incorporated.
AS-Interface® is a registered trademark of the AS-International Association
Kynar® is a registered trademark of Elf Atochem North America, Inc.
Hastelloy® is a registered trademark of HAYNES INTERNATIONAL, INC. (DELAWARE CORPORATION)
Monel® is a registered trademark of the INCO family of companies
Tri-Clamp® is a registered trademark of Ladish Co.
Varivent® is a registered trademark of Tuchenhagen GmbH LTD
BULLETIN: 51-160.3
EFFECTIVE: October 2013
SUPERSEDES: August 2011
Similar pages