• Copyright: All content on this document, such as text, graphics, logos and images is the property of Sapcon Instruments Pvt. Ltd. The selection,
arrangement and presentation of all materials on this document and the overall design of this document is the exclusive property of Sapcon Instruments
Pvt. Ltd.
• The images shown in this manual may differ from the actual instrument / housing in terms of dimensions, color and design. Please refer to GA drawings
for dimensional details.
• Values (of performance) described in this manual were obtained under ideal testing conditions. Hence, they may differ under industrial environment and
settings.
General Instructions
• Instrument shouldn’t block the material filling inlet.
• Secure the cover of housing tightly. Tighten the cable glands. For side mounting, the cable glands should point downwards.
• For side mounting, provide a baffle to prevent the material from falling on the probe.
• When handling forks, do not lift them using their tines. While using them with solids, ensure that material size is less than 10mm.
• Deforming the shape of the tines may interfere with the fork’s operating frequency.
• Make all electrical connections as instructed in the manual. Don’t power on the device before verifying the connections.
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Probe Length
Tines Length
Housing Pressure Die Cast
Aluminium (IP68)
Cable Entry Gland
(Polyamide)
External LED Indication
with Infrared output (Optional)
Ø90 mm
89 mm
Vibrating Fork (SS 316L)
Extention Pipe Ø42mm
(SS 316)
1Introduction
Elixir is a Vibrating Fork Liquid Level Limit Switch. It is
suitable for level detection in storage tanks, mixing containers and pipelines, for liquids that do not react with stainless
steel (SS) whose viscosity does not exceed 10000 cP. It is
suitable for most of the applications where float switches
were previously employed, as well as in such places where
float switches were not appropriate (due to deposit formation, turbulence, stresses and air bubbles).
Figure 1: Elixir Product Image
2Operating Principle
A specially shaped tuning fork is kept vibrating using
piezo-electric elements. Typically, the fork vibrates at its
natural frequency. The frequency of oscillation for the tuning fork changes when immersed in liquids. The change in
frequency is detected by the microprocessor leading to a
switching decision.
3Features
• Universal Power Supply: 18 - 55V DC, 90 - 265V AC
• Low Power Consumption: less heat, long life
• High temperature durability (H1 up to 200
◦
C)
• Immunity to spurious external vibrations, material tur-
bulence and flow
• Suitable for liquids with viscosity up to 10,000 cP
• Fast switching
• Self-diagnosis
• Independent of material’s electrical properties
4System Description
The elixir level detecting system consists of a microcontroller based electronic insert with fork probe. The instrument comprises of an electronics SS 316 tuning fork
housed in a cast aluminum housing provided with 2 suitable
cable entries. The fork is of a special shape suitable for operating in liquids of specified range of viscosities. This is
provided with either screwed mounting or flanged mounting
suitable for installation on to a container or pipeline. Piezo
ceramic elements are mounted inside the fork capsule and
potted with epoxy compound for rendering them immune to
dust, moisture and inflammable gases.
5Applications
Elixir is suitable for the following applications and industries:
Figure 2: Description of Parts
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Sapcon Instruments Pvt.Ltd.
• FMCG
• Paint
• Textile
• Breweries
• Cosmetics
• Chemicals
• Pesticides
• Edible Oil
• Sugar Powder
• Utility Paper
• Confectionery
• Food Industry
• Dairy Industry
• Packaging Industry
• Pharmaceutical
Industry
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6Electrical Specifications
Please refer to Table 1 for Electrical Specifications.
ProtectionIf required, additional over-current and short-circuit protec-
tions can be provided with the use of an external fuse rated
for 500mA.
Table 1: Electrical Specifications
7Application Specifications
Please refer to Table 2 for Application Specifications.
ParameterValue
Response Time
• Cover Delay - 0.8 seconds
• Uncover Delay - 1 seconds
Hysteresis3 - 4 mm
DensityAbove 0.7gm/cm
3
ViscositySuitable for liquids with viscosity up to 10,000 cP
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Table 2: Application Specifications
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8Mechanical Specifications
Please refer to Table 3 for Mechanical Specifications.
ParameterValue
Active Fork Length44 mm and 100 mm
Housing
• SCUTE: Pressure die-cast aluminium weatherproof
(Rating IP-68)
• FP2C: Cast aluminium, weatherproof & flameproof,
powder coated, suitable for Gas Groups IIA, IIB &
IIC as per IS-2148
Electrical ConnectorPG-13.5, 1/2" BSP DC Glands, 1/2” NPT DC Glands
Mounting
• Screwed - 1”/1 1/2” BSP/NTP(M)
• Flanged - As per your specifications
• Material - MS (Plated), SS
Extension PipeGI (Galvanized Iron) / SS-304 / SS -316
Wetted Parts
• S4: SS 304
• S6: SS 316
• S6L: SS 316L
• HA: Hastelloy C
• CHLR: Halar Coated
• PTFE: Teflon Coated
Process Temperature
• A (Ambient): Below 100
• H (High temperature): 100
◦
C
◦
C - 200◦C
Resonant Frequency
• Active Fork length of 100mm
• Active Fork length of 44mm
Table 3: Mechanical Specifications
9Switching Indication
Please refer to Table 4 for Switching Indication.
ParameterValue
Internal IndicationTwo LEDs
External IndicationAvailable only in SCUTE
Value
• Approx. 1.1KHz
• Approx. 1.5KHz
• Green: Normal
• Red: Alarm
Enclosure
Table 4: Switching Indication
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10Influences on Switching Point
1. Process Pressure - It has no significant effect on the switching point of the device as can be observed from the Figure 3.
Figure 3: Influence of Process Pressure on Switching Point
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2. Process Temperature - The influence of temperature on switching point of the device is described in Figure 4.
Figure 4: Influence of Process Temperature on Switching Point
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3. Liquid Density - The influence of liquid density on switching point of the device can be seen in the graph in Figure 5.
Figure 5: Influence of Liquid Density on Switching Point
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11Installation & Handling Guidelines
The elixir can be installed in the vessel in almost any position. Previously existing bosses welded in any direction can
be used. Since the fork can be screwed into a mounting
socket suitable for supplied mounting threads and the fork
length is comparatively short, it can be installed directly on
pipes too. For liquids with higher viscosities, top mounting
or side mounting with tines slanting downwards is preferred
as then the viscous liquid can drip off faster when the level
goes below the set point.
While installation of probe, please take care of the following
points:
• The instrument shouldn’t block the material filling inlet.
• Secure the cover of housing tightly. Tighten the cable
glands.
• For side-mounting, provide a baffle to prevent the ma-
terial from falling on the fork. Please refer to Figure 6.
User Manual & Datasheet V 2.3
Figure 8: Tines Handling
• Weatherproofness of enclosure is guaranteed only if
the cover is in place glands adequately tightened.
Damage due to accidental entry of water can be
avoided if the instrument is installed in a rain shade.
• If the ambient temperature is high, the instrument
should not be installed to receive direct sunlight. In
case such a position of shade is not available, a heat
shield should be fitted above the instrument especially
if the operating temperature lies between 60◦C and
◦
80
C.
• While screwing the elixir instrument, the hexagonal
mounting bush should be turned and not the housing.
Figure 6: Provision of Baffle
• When handling forks, do not lift them using their tines.
Please see Figure 7.
Figure 7: Instrument Handling
• The tines should not be bent nor should their dimen-
sions be altered. Deforming the shape of the tines may
interfere with the fork’s operating frequency. Please
see Figure 8.
• Make all electrical connections as instructed in the
manual. Don’t power on the device before verifying
connections.
• To prevent the ingress of moisture and water seepage
in side mounting position, the cable entries should always point downwards.
12Electrical Connections
Please refer to the Figures 9a, 9b and 9c for the same.
13Calibration Settings
Follow the below procedure for calibrating the instrument
at notch point
• To start with calibration, set calibration switch to
CLOSE position. (CLOSE is opposite of OPEN on the
DIP switch.)
• Make sure that Status LED is not blinking for error.
• Dip the fork till the notch point.
• Then press ENTER.
• The Status LED will blink in RED color.
• Blinking indicates that elixir is registering the switch
point position.
• Keep ENTER key pressed for 4 to 5 blinks.
• Then release the ENTER key.
• On Release, the status LED should :
- Turn RED for Maximum Failsafe Selection.
- Turn Green for Minimum Failsafe Selection.
- This indicates that calibration is correct.
• Now test the calibration by dipping and removing the
tines from liquid.
• During calibration, delays are automatically by-passed.
• If calibration is correct, put the calibration switch back
to the OPEN position.
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OPEN
ENTER
COVER
UNCOVER
CALIBRATE
FAILSAFE
ELIXIR
STATUS
LED
RED
GREEN
L NERelay-1PNP
1234 5 6 78 9
++
-
NC C NOOUT
-
AC Supply DC Supply
L (Live)
N (Neutral)
90-265 V AC 18-55 V DC
+
R
L
(Available only in DC Power Supply)
OPEN
ENTER
COVER
UNCOVER
CALIBRATE
FAILSAFE
ELIXIR
STATUS
LED
RED
GREEN
LNERelay-1
1234 5 6 7 89
+
NC C NO
-
AC Supply DC Supply
L (Live)
N (Neutral)
90-265 V AC 18-55 V DC
+
Relay-2
NC C NO
OPEN
ENTER
COVER
UNCOVER
CALIBRATE
FAILSAFE
ELIXIRNAMUR
STATUS
LED
RED
GREEN
123
45
6
7
89
+
OPEN
COVER
UNCOVER
CALIBRATE
FAILSAFE
OPEN
ENTER
COVER
UNCOVER
CALIBRATE
FAILSAFE
ELIXIR
STATUS
LED
RED
GREEN
OPEN
ENTER
COVER
UNCOVER
CALIBRATE
FAILSAFE
ELIXIR
STATUS
LED
RED
GREEN
OPEN
ENTER
COVER
UNCOVER
CALIBRATE
FAILSAFE
ELIXIR
STATUS
LED
RED
GREEN
Note:
You can set the value of COVER DELAY between 125 secs.
Follow the below procedure for setting Cover Delay
1. Ensure that all DIP switches are in OPEN position as
shown in Figure 10. Make sure that STATUS LED is
not blinking for Error.
(a) Electronics option SPDT Relay and
PNP Output(SPN)
(b) Electronics option DPDT Relay(D)
Figure 10: Cover Delay Switch Position
2. To set the Cover Delay, set the COVER switch to
CLOSE position as shown in Figure 11.
(CLOSE is the opposite of OPEN for a DIP switch.)
The STATUS RED LED will glow.
Figure 11: Cover Delay Switch Position
3. Press ENTER and keep it pressed as shown in Figure
12. The STATUS RED LED will start blinking. Count
the number of blinks. After setting the value release
the ENTER key.
(c) Electronics option NAMUR Output(NMR)
Figure 9: Electrical Connections
• Else, elixir will indicate error after 2 minutes of pressing
the ENTER key for the last time.
• If calibration is incorrect, repeat the above stated steps
once again.
14Cover Delay
When the application material covers the fork tines,
the changeover of the output can be delayed by a predetermined time. This time is called COVER Delay. For
a different value of Cover Delay, the number of blinks can
be adjusted as per requirement.
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Figure 12: Setting Cover Delay
4. Delay is entered, but not saved. To save and test the
Cover Delay, set the COVER switch back to OPEN position as shown in Figure 13. The STATUS LED will
come back to its original position.
Figure 13: Saving Cover Delay
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5. To test, dip elixir into the application material until the
OPEN
ENTER
COVER
UNCOVER
CALIBRATE
FAILSAFE
ELIXIR
STATUS
LED
RED
GREEN
OPEN
ENTER
COVER
UNCOVER
CALIBRATE
FAILSAFE
ELIXIR
STATUS
LED
RED
GREEN
OPEN
ENTER
COVER
UNCOVER
CALIBRATE
FAILSAFE
ELIXIR
STATUS
LED
RED
GREEN
OPEN
ENTER
COVER
UNCOVER
CALIBRATE
FAILSAFE
ELIXIR
STATUS
LED
RED
GREEN
OPEN
ENTER
COVER
UNCOVER
CALIBRATE
FAILSAFE
ELIXIR
STATUS
LED
RED
GREEN
switching point is reached.
The STATUS LED will start blinking RED if the switch
point is reached. It will blink for the number of seconds for
which the cover delay is set. 1 blink is equal to 1 second
during switching. A maximum of 25 seconds can be set.
15Uncover Delay
User Manual & Datasheet V 2.3
Figure 16: Saving Uncover Delay
When the application material uncovers elixir’s fork tines,
the changeover of the output can be delayed by a predetermined time. This time is called UNCOVER Delay. For
a different value of Uncover Delay, the number of blinks can
be adjusted as per requirement.
Note:
You can set the value of UNCOVER DELAY between
1-25 secs.
Follow the below procedure for setting Uncover
Delay
1. Ensure that all DIP switches are in OPEN position as
shown in Figure 10. Make sure that STATUS LED is
not blinking for Error.
2. To set the Uncover Delay, set the UNCOVER switch to
CLOSE position as shown in Figure 14.
(CLOSE is the opposite of OPEN for a DIP switch.)
The STATUS RED LED will glow.
5. To test, dip elixir into the application material until the
switching point is achieved.
6. The STATUS LED will start blinking GREEN if the
switch point is achieved. It will blink for the number
of seconds for which the Uncover Delay is set.
16Failsafe Settings
In a condition of device failure, known errors and input
power failure the outputs of the device resemble the ALARM
condition. This is meant to prevent overflow or dry run conditions in case of failures.
Prevent Overflow - High Level Switch Failsafe High (default) is set by moving the Failsafe switch to OPEN position.
1. When not in contact with the material, LED turns
GREEN.
2. When in contact with the material, LED turns RED.
Figure 14: Uncover Delay Switch Position
3. Press ENTER and keep it pressed as shown in Figure
15. The STATUS RED LED will start blinking. Count
the number of blinks. After setting the value release
the ENTER key.
Figure 15: Setting Uncover Delay
4. Uncover Delay is entered, but not saved. To save and
test the Uncover Delay, set the UNCOVER switch back
to OPEN position as shown in figure 16. The STATUS
LED will come back to its original position.
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Figure 17: Failsafe High
Prevent Dry run - Low Level Switch Failsafe Low is set
by moving the Failsafe switch to CLOSE position
1. When in contact with the material, LED turns GREEN.
2. When not in contact with the material, LED turns RED.
Figure 18: Failsafe Low
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17Troubleshooting & Fault Indication
17.1
17.2
1. Temperature
2. Loss of Vibration
Output Indications
Green LED Glows When:
• Fork is Uncovered and Fail-safe is High
• Fork is Covered and Fail-safe is Low
Red LED Glows When:
• Fork is Covered and Fail-safe is High
• Fork is Uncovered and Fail-safe is Low
Error Indications
• Blue LED glows when temperature of electronic
insert goes above 120◦C.
tuning fork from deposits. If the material has tendency to
form a hard sticky deposit, the instrument must be checked
more often. Make sure that the cable ducts and the lid are
tightly sealed so that no moisture seeps into the instrument.
19Customer Support
Thank you for going through the instructions given in this
manual. To further ease the process of installation and use,
we have developed special demo videos which are hosted
on YouTube.
Sapcon’s YouTube channel, SAPCON INSTRUMENTS,
lists all these videos: https://goo.gl/dnxfcz
Should you require further information regarding installation, use or working of the instrument, please don’t hesitate
to contact us. Kindly provide the following information at the
time of contacting:
• Instrument Model and Serial Number
• Purchase Order Number and Date of Purchase
• Description of the query
• When Red LED blinks continuously and Fail-safe
is High
• When Green LED blinks continuously and Fail-
safe is Low
Troubleshooting: The following reasons may be responsible for the absence of vibrations in the fork:
• The instrument is damaged.
• The instrument is working but there may be solid
particles in the application medium clogging the
fork.
• Heavy build-up of application medium can
dampen the fork oscillations. In this case, the
fork requires to be cleaned.
• If material is very viscous, the fork vibrations will
resume when the fork is uncovered. In this case,
the error indication should be ignored.
3. No LED Glows
• This would happen in absence of power supply
to the instrument.
4. Line Break to Piezo Drive/Oscillator
• Your contact details
In an attempt to serve you better, we are open seven days
a week (9:30am to 7:30pm). We are available at:
• www.sapconinstruments.com
• sales@sapcon.in
• +91-731-4757575
• In fail-safe ’High’ mode, instrument will switch to
alarm condition if the connectivity between vibrating fork and electronics is lost.
18Maintenance
The electronics of elixir instrument needs no mainte-
nance. When cleaning and checking the vessel, free the
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20Product Selection Order Code
Product
ELIXIR - Liquid Level Switch for Sticky, Corrosive, Agitated, Splashing, Foaming Liquids suitable for liquids with viscosity up to
10,000cp