King-Gage ES2 550*-1 Series User manual

Page 1
ES2 Electronic Liquid Level Transmitter EX-1832Effective: August, 2004 EX-1832
KING-GAGE
®
4-20 mA Remote Liquid Level Transmitter
ES2
Remote Liquid Level Transmitter
Model 550*-1-** w/Cable
and Junction Enclosure
Installation and
Operation Instructions

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ES2 Electronic Liquid Level Transmitter EX-1832
© 2004 King Engineering Corporation. All rights reserved.
The information contained in this manual was accurate at
the time of release. Specifications are subject to change
without notice.
Warranty - All King Engineering products are guaranteed
to be free from defects in material and workmanship for
one year from the date of purchase. Any product or part
found to be defective under normal use within one year of
purchase will be repaired or replaced at no charge if
returned to the company at Ann Arbor, Michigan within
ten days of discovery of the defect. No other warranties,
whether expressed, implied or statutory, including the
warranties of fitness for a particular purpose or merchanta-
bility, are given by this agreement.
The exclusive remedy for nonconformity of these goods
shall be repair and/or replacement of the nonconforming
goods or parts.
Seller will not be liable for consequential damages resulting
from breach of this agreement. The term “consequential
damages” shall include but shall not be limited to damage
to all machines, equipment and goods other than the
goods sold hereby, interruption of production, loss of
profits, delays of any kind, administrative expense, and
overhead.
Revisions:
(A) August, 2004 - Original Release

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ES2 Electronic Liquid Level Transmitter EX-1832
KING-GAGE ES2 Level Transmitter
Two-wire sensor/transmitter provides a direct 4-20 mAdc
analog electronic output signal. Fixed-range transmitter is
designed specifically for hydrostatic pressure measurement
for liquid level gauging.
Transmitter package includes 15 feet of cable and corro-
sion-resistant Signal Junction Enclosure. (This enclosure
also houses the external zero adjustments and signal loop
connection terminals.)
Range Designation
A model number/range designation is listed on the end of
the transmitter housing. The last two digits of the model
number actually refer to the transmitter range. As an
example, MODEL 5502-1-10 is a 0-10 psig range,
standard mount transmitter.
Model No. Designations
55xx-1-xx
Pressure Range
05 ............... 0-5 psig
10 ............... 0-10 psig
15 ............... 0-15 psig
30 ............... 0-30 psig
50 ............... 0-50 psig
Configuration (Housing)
01 ..... Short Mount
02 ..... Standard Mount
03 ..... Long Mount
Flush-Weld
Tank Shell
Insulated
Tank Wall Junction
Enclosure
KING-GAGE
®
Electronic
4-20 mA
Sensor
MODEL/RANGE
5701-1-15 PSIG
Clamp Nut

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ES2 Electronic Liquid Level Transmitter EX-1832
Sensor Cable
15 ft. supplied
MODEL
550*-1-**
7.625 in.
194 mm
6.625 in.
168 mm
MODEL
550*-1-**
9.891 in.
251 mm
8.875 in.
225 mm
MODEL
550*-1-**
7.625 in.
194 mm
2.250 in.
57 mm
Signal
Junction
Enclosure
4.33 in.
110 mm
YEL.
GRN.
WHT.
BLK.
RED
4-20 mA OUTPUT
ZERO SPAN
CAUTION
-
+
-
+
METER
KING-GAGE ®
Electronic
4-20 mA
Sensor
2.96 in.
75 mm
Mounting
holes (2)
3.23 in
82 mm
Model 5501
Short Mount
Model 5503
Long Mount
Model 5502
Standard
Mount

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ES2 Electronic Liquid Level Transmitter EX-1832
Mounting Supplied Junction Enclosure
This corrosion resistant non-metallic enclosure houses the
zero adjustment and serves as the signal terminal connec-
tions for the transmitter. The supplied transmitter cable
must terminate within the enclosure to maintain the atmo-
spheric reference vent integrity. Do not mount enclosure
beyond what the supplied cable length will allow — DO
NOT SPLICE additional cable onto the transmitter.
Seal plugs (caps) are supplied with the Junction Enclo-
sure. These are intended to be installed over the
mounting hole provisions to seal the mounting hardware
openings. Note that mounting fasteners are not fur-
nished and must be supplied by customer.
Sensor
Cable
Rubber
Ferrule
Locking
Nut
Detail - Mounting Junction Enclosure
Detail - Sensor Fitting
Seal Plug (2)
3.23 in
82 mm
KING-GAGE
®
Electronic
4-20mA
Sensor
Signal
Junction
Enclosure
Mounting
Hardware (2)
(Customer
Supplied)
Customer Mounting
Surface

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ES2 Electronic Liquid Level Transmitter EX-1832
Signal Output
Terminals
(4-20 mAdc)
+ -
4-20 mA
+24V
— +
2
1
2-Terminal Input Connection
KING-GAGE LevelPRO multiple
tank indicators
3-Terminal Input Connection
KING-GAGE LevelPRO multiple
tank indicators
Power Requirement
The ES2 transmitter requires a source of DC power for
operation. Minimum excitation voltage must be no less
than 10 VDC. Any receiver installed on the signal loop
(meters, data loggers, controllers, etc.) must be taken into
account when determining the required power supply
voltage to be used. The internal resistance of each device
added together represents the total “load” residing on the
signal loop circuit.
Load Capacity = (Supply Voltage - 10)
(OHMS) .02
Load Capacity at Supplied Voltage
KING-GAGE®tank processors and LevelBAR provide 24
Vdc excitation to power the signal loop circuit. (If the
application requirement exceeds 700-ohms, an external
power supply of appropriate voltage will be required.)
Shielded Cable/Electrical Grounding
Avoid installing sensitive measuring equipment, or wire
carrying low level signals, near sources of electrical and
magnetic noise, such as breakers, transformers, motors,
SCR drives, welders, fluorescent lamp controllers, or relays.
Use twisted pair wiring to reduce magnetic noise pickup.
Look for 10 to 12 twists per foot. Use shielded cable with
the shield connected to circuit common at one end only.
Never run signal-carrying wires in the same conduit that
carries power lines, relay contact leads or other high-level
voltages or currents.
The signal output is transmitted through 4-20 mA current
loops that are low impedance electric circuits. Long cabling
runs can increase the susceptibility for higher levels of noise to
be transferred to the current loop circuit. Also, intermittent
EMI or RFI with a changing frequency or intensity may induce
interference on the transmitted output signal. Use of shielded
twisted pair cable will minimize problems with electrical noise
over the current loop.
Shielding should be terminated to earth ground at the KING-
GAGE LevelPRO processor or other external device supplying
Vdc power to the current loop circuit. The other end of the
cable shielding should be connected to the terminal block in
the supplied junction enclosure (see detail for shield terminal
location).
Terminate shield to earth ground at one
point only!
• Note that chassis ground (or backplane) of many PLCs are
connected to earth ground.
• If necessary, you may use the back plate of LevelPRO for
making earth ground connections.
20 Vdc 24Vdc 28Vdc 32Vdc
500 ohms 700 ohms 900 ohms 1100 ohms
+ - SHIELD
4-20 mA
+24V
— +
2
13
TMP
Signal Output
Terminals
(4-20 mAdc)
Water-Tight
Cord Grip Fitting
Sensor Input
Connector
Junction
Board
YEL.
GRN.
WHT.
BLK.
RED
4-20 mA OUTPUT
ZERO SPAN
CAUTION
-
+
-
+
METER

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ES2 Electronic Liquid Level Transmitter EX-1832
Transmitter Adjustments
The ES2 transmitter provides for the zero (trim) adjustment
to be made within the signal junction enclosure. Test meter
connections are also located within the enclosure making
for simplified in-process monitoring by maintenance or
operating personnel.
Zero Adjustment
Some adjustment of the trasmitter “zero” setting may be
periodically required. It is generally recommended that the
zero output be checked at least every 12 months.
In-Process Monitoring
The milliamp output signal (4-20 mAdc) can be checked
while the transmitter is installed at the tank. Test meter
terminals are provided within the Signal Junction Enclosure
(see previous page) that permit accurate reading without
disturbing the signal loop wiring.
Important! Set meter for DC current, mA or .001 Amp
scale. Internal resistance through the meter must be 20
ohms or less. Higher resistance values will erroneously
show lower milliamp reading on meter.
Note: Always re-install cover when done.
Sensor Cable
The transmitter cable contains five (5) individual wires that
are to be terminated within the junction enclosure. Follow
color code as noted in the illustration on this page (note
that circuit board color code is improperly marked).
This integral cable maintains the necessary atmospheric
reference vent for the sensor. Do not splice signal cable
from the tank sensor. A water-tight plastic connector seals
the sensor cable at the bottom of the junction enclosure.
GREEN
BLACK
WHITE
BLACK
RED
BLACK
(NOT USED)
YEL.
GRN.
WHT.
BLK.
RED
WIRE COLOR CONVERSION / BOARD CONNECTORS

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ES2 Electronic Liquid Level Transmitter EX-1832
Calculating Milliamp Output
The King-Gage Electronic Sensor is factory-calibrated to
nominal range only. Since there is no appreciable degree
of span adjustment, the milliamp output of the sensor at
full tank level will generally be less than 20.00 mA.
Actual output can be calculated based on total tank depth
and specific gravity of the liquid product:
(B- A) x C= Tank Pressure
27.6807
where ...
A= Reserve (inches of depth from low point of tank
to sensor)
B = Full Tank (inches of depth from low point of tank
to full)
C = Specific Gravity of Tank Contents
Now, using the calculated tank pressure from above, the
actual milliamp value at full can be determined:
(16 x Tank Pressure) + 4 = mA Output
NOMINAL psig RANGE
;;;;;;
;;;;;;
;;;;;;
;;;;;;
;;;;;;
MODEL/RANGE
5701-1-15PSIG
Sensor
Assembly
B
A
Tank
Milk
1.032 sp. gr.
Example - mA Output Calculation for Tank Gauging
Application
The following example shows how the milliamp output of
the sensor at full tank can be calculated. The “Reserve”
represents the distance from the lowest point on the
bottom of the tank to the installed sensor. “Full” is the level
of contents at which the tank is filled to capacity. The liquid
contents of the tank is milk @ 1.032 sp.gr. The sensor
installed is a nominal 15 psig range model.
C= 1.032 (specific gravity)
B= 400 in. (full level)
A= 28 in. (reserve)
(400 - 28) x 1.032 = 13.87 psig
27.6807
(16 x 13.87) + 4 = 18.79 mA
15 PSIG
3201 South State St., Ann Arbor, Michigan 48108-1625 U.S.A.
PO Box 1228, Ann Arbor, Michigan 48106-1228 U.S.A.
Phone: [phone] • FAX: [phone]
www.king-gage.com
CORPORATION
ENGINEERING
KIN
G
®
Since 1937