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7720 Series
Installation Instructions
Flow Meter liMited warranty
Meters are warranted against defects in materials and workmanship to the original user for a period of
thirteen (13) months from the date of factory shipment, provided the meter is installed, operated and maintained in accordance with King Instrument Company’s instructions and recommendations.
This warranty does not apply if failure is caused or contributed to by any of the following: improper handling, improper storage, abuse, unsuitable application of the product, lack of reasonable and necessary
maintenance, use exceeding suggested pressure and temperature maximums, improper packaging for
return, or repairs made or attempted to be made by anyone other than King Instrument Company, Inc.
KING INSTRUMENT COMPANY, INC. MAKES NO WARRANTY AS TO THE FITNESS OF ITS PRODUCTS FOR SPECIFIC APPLICATIONS.
This warranty is valid for the original end-user only and does not apply to products that have been damaged or modied. This warranty is non-transferrable and is limited to replacement or repair. The liability of
King Instrument Company arising out of its supply of the products, or their use, shall not in any case exceed
the cost of correcting defects in the products as set forth above.
THIS WARRANTY IS A LIMITED WARRANTY AND SHALL BE IN LIEU OF ANY OTHER WARRANTIES, EXPRESSED
OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OR MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE. THERE ARE NO OTHER WARRANTIES WHICH EXIST BEYOND THE DESCRIPTION
OR FACE HEREOF.
IN NO EVENT SHALL KING INSTRUMENT COMPANY BE LIABLE FOR LOSS OF PROFITS, INDIRECT, CONSEQUENTIAL OR INCIDENTAL DAMAGES.
Products should be returned, prepaid, to King Instrument Company, Inc. with proof of purchase. Call factory
for Return Merchandise Authorization (RMA) number and return instructions.
this is iMportant inForMation.
read it careFully beFore beginning work.
1) Inspect meter for damage that may have occurred during shipping.
Report any damage to the container to the freight carrier immediately.
2) Make sure your pressure, temperature, uid and other requirements
are compatible with the meter and components (including o-rings).
3) Select a suitable location for installation to prevent excess stress on
the meter which may result from:
a) Misaligned pipe.
b) The weight of related plumbing.
c) “Water Hammer” which is most likely to occur when ow is
suddenly stopped as with quick closing solenoid operated
valves. (If necessary, a surge chamber should be installed. This
will also be useful in pressure start-up situations.)
d) Thermal expansion of liquid in a stagnated or valve isolated
system.
e) Instantaneous pressurization which will stress the meter and
could result in tube failure.
note: In closed thermal transfer or cooling systems, install the meter
in the cool side of the line to minimize meter expansion and contraction and possible uid leaks at the threaded connections.
4) Handle the meter carefully during installation.
a) Use an appropriate amount of teon tape on external pipe
threads before making connections. Do not use paste or stick
type thread sealing products.
5) Install the meter vertically with the inlet port at the bottom.
6) Meters with plastic ttings must be installed so that ttings are not
made to support any part of the associated plumbing. In addition,
meter frame should be fastened to bulkhead, panel or column
additionally:
• 7720 Series meters are designed for vertical installation only. (Inlet
at bottom, Outlet at top)
• Do not remove or adjust the screws on the side of the indicator
housing. These screws were positioned during factory calibration
and represent the zero adjustment. If the pointer is set on zero,
proceed with installation. If the pointer is not set at zero, follow
these steps:
1) Remove front cover with gasket from indicator housing.
2) Loosen set screw at the base of the pointer hub.
3) Reposition pointer to zero line.
4) Tighten set screw with a 1/16” allen wrench by holding the
pointer hub and gently tightening the set screws.
5) Replace front cover with gasket on indicator housing.
CAUTION: ZERO IS FACTORY SET WHEN METER IS CALIBRATED.
DO NOT LOOSEN SCREWS THAT FASTEN INDICATOR HOUSING
TO METER BODY. IF INDICATOR HOUSING IS MOVED, THE METER
WILL NEED TO BE CALIBRATED.
When it comes to ow...we’re instrumental.
(714) 891-0008 • www.kinginstrumentco.com
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7720 Series
SHIELD SCREW
SHIELD SCREW O-RING
SHIELD WITH GASKET
INDICATOR HOUSING/
POINTER NEEDLE SET SCREW
FLOAT
END FITTING O-RING
OUTLET END FITTING
ORIFICE HOUSING O-RING
ORIFICE HOUSING/
OUTLET FLOAT STOP
METER TUBE ASSEMBLY ORIFICE ASSEMBLY
HOUSING ASSEMBLY
TAPER SLEEVE
INLET END FITTING
INLET FLOAT STOP
HOUSING ASSEMBLY
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1
1
1
CONFIGURATIONS VARY BY FLOW RATE AND METER SIZE.
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1
Installation Instructions
Max Non-Shock Pressure and Temperature
Fitting Temp Size
4 and 6
FNPT 130°F Max 150 psig 125 psig
150# Flange 130°F Max 150 psig 150 psig
300# Flange 130°F Max 150 psig 150 psig
caution
• O-rings should be replaced if meter is disassembled
after it has been in service.
• Do not loosen nuts that fasten indicator housing
to metering tube. If the relationship of meter tube
and indicator housing are changed, meter must be
calibrated.
• Serious property damage and great personal injury
could occur as the result of a meter misused or used in
an unsuitable application.
repair
7720 meters that require repair should be sent to the
factory. Please call for aReturn Merchandise Authorization (RMA) number and return instructions.
Size
8 thru 12
7720 series asseMbly
parts list:
1. Shield Screw
2. Shield Screw O-Ring
3. Shield With Gasket
4. Indicator Housing/Meter
Tube Assembly
5. Pointer Needle Set Screw
6. Float
7. Outlet Float Stop Housing
Assembly
8. End Fitting O-Ring
FLANGE
FNPT
9. Outlet End Fitting
10. Orice Housing O-Ring*
11. Orice Housing/ Orice
Assembly*
12. Inlet Float Stop Housing
Assembly*
13. Taper Sleeve*
14. Inlet End Fitting
*CONFIGURATIONS VARY BY FLOW
RATE AND METER SIZE.
warning:
Pressure and temperature ratings are based on a study
of the engineering data for particular materials used in
construction and on the design of individual models.
This information is supplemented by destructive test
results. Meters with stainless enclosures must never
be operated without shields securely in place. Meters
exposed to dicult environments such as those created
by certain chemicals, excessive vibration or other stress
inducing factors could fail at or below the suggested
maximums. Never operate meters above pressure and
temperature maximums. It is strongly recommended
that all meter installations utilize an appropriate pressure relief valve and/or rupture disc. The pressure settings and locations of these devices should be such that
meters cannot be over pressurized. Meter failure could
result in damage to equipment and serious personal
injury. Always use suitable safety gear, including OSHA
approved eye protection when working around meters
in service. We are happy to pass along chemical compatibility information that has been published by the
manufacturer’s of raw materials used in our products;
however, this information should not be construed as a
recommendation made by King Instrument Company,
Inc. for a specic application.
8X
8X
FLANGE FNPT
When it comes to ow...we’re instrumental.
(714) 891-0008 • www.kinginstrumentco.com
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To convert the measured flow into a 4-20 mAdc signal, an angle of rotation
transmitter is mounted to the indicator. This device is factory calibrated to
ensure accuracy and should only be adjusted by King Instrument
Company.
4-20 mA TRANSMITTER SPECIFICATIONS:
POWER SUPPLY:
MAXIMUM CURRENT CONSUMPTION:
TEMPERATURE LIMITS:
OUTPUT:
ACCURACY: <=0.5%
LINEARITY: +/- 0.4%
INFLUENCE FROM BEARING: +/- 0.1%
ELECTRICAL CONNECTIONS:
S1
SPANZERO
-
+
OUT
V
TRANSMITTER HOUSING
TRANSMITTER SHAFT
TRANSMITTER
JUMPER WIRE
RED WIRE (+)
BLACK WIRE (-)
BROWN
BLUE
BLACK-1
RED-1
BLACK-3
BROWN
BLUE
RED-2
BLACK-2
ALARM
SENSOR
ALARM
SENSOR
(HIGH)
(LOW)
All 7720 Series flowmeters may be fitted with one or two inductive slot sensors.
single pole double throw (SPDT) relays, and are DIN rail mountable. (Only
24VDC units are actually powered by the rail.) See barrier / switch isolator
specifications for electrical connections and further details.
TYPE:
Inductive
5-25V DC (Switch Isolator)
NAMUR
<= 1mA-Float Present
>= 3mA (15mA Max.)-Float Absent
2kHZ
WIRING: 2 Conductor, NAMUR
POS=BROWN / NEG=BLUE
TERMINALS: #1=POS / #2=NEG
General Purpose
UL:
CSA:SENSOR APPROVALS:
RED-2
BLACK-2
BLACK-3
(GROUND)
RED-1
BLACK-1
(GROUND)
TEMPERATURE INFLUENCE (AMBIENT): +/- 0.03% per degree C
POWER SUPPLY INFLUENCE: +/- 0.1%
LOAD RESISTANCE INFLUENCE: +/- 0.03% at R max.
ZERO POINT MARK
ZERO POINT MARK
(2 WIRE ONLY)
TRANSMITTER - REAR VIEW 2-WIRE CONNECTION
ZERO: POTENTIOMETER P1 FOR
ZERO POINT
POTENTIOMETER P2 FOR
MEASURING RANGE AND
VALUE
SPAN:
SWITCH FOR REVERSING
ROTATION (NOT
S1:
To convert the measured flow into a 4-20 mAdc signal, an angle of rotation
transmitter is mounted to the indicator. This device is factory calibrated to
ensure accuracy and should only be adjusted by King Instrument
Company.
4-20 mA TRANSMITTER SPECIFICATIONS:
POWER SUPPLY:
MAXIMUM CURRENT CONSUMPTION:
TEMPERATURE LIMITS:
OUTPUT:
12-33V DC
40 mA
-13°F to 158°F (-25°C to 70°C)
4 to 20 mAdc
ACCURACY: <=0.5%
LINEARITY: +/- 0.4%
INFLUENCE FROM BEARING: +/- 0.1%
ELECTRICAL CONNECTIONS:
S1
SPANZERO
-
+
OUT
V
TRANSMITTER HOUSING
TRANSMITTER SHAFT
TRANSMITTER
JUMPER WIRE
RED WIRE (+)
BLACK WIRE (-)
V-V+OUT
ext
R
R
ext: EXTERNAL RESISTANCE =
POWER SUPPLY (V) -12V
OUTPUT SIGNAL (mA)
H
Inductive
5-25V DC (Switch Isolator)
NAMUR
<= 1mA-Float Present
>= 3mA (15mA Max.)-Float Absent
2kHZ
POS=BROWN / NEG=BLUE
TERMINALS: #1=POS / #2=NEG
General Purpose
TEMPERATURE INFLUENCE (AMBIENT): +/- 0.03% per degree C
POWER SUPPLY INFLUENCE: +/- 0.1%
LOAD RESISTANCE INFLUENCE: +/- 0.03% at R max.
ZERO POINT MARK
ZERO POINT MARK
(2 WIRE ONLY)
TRANSMITTER - REAR VIEW 2-WIRE CONNECTION
ZERO: POTENTIOMETER P1 FOR
ZERO POINT
POTENTIOMETER P2 FOR
MEASURING RANGE AND
VALUE
SPAN:
SWITCH FOR REVERSING
S1:
H: DC POWER SUPPLY (12V-33V)
S1
SPANZERO
-
+
OUT
V
TRANSMITTER HOUSING
TRANSMITTER SHAFT
TRANSMITTER
JUMPER WIRE
RED WIRE (+)
BLACK WIRE (-)
BROWN
BLUE
BLACK-2
(GROUND)
BROWN
BLUE
BLACK-1
RED-1
BLACK-3
BROWN
BLUE
RED-2
BLACK-2
ALARM
ALARM
SENSOR
ALARM
SENSOR
(HIGH)
(LOW)
POS=BROWN / NEG=BLUE
TERMINALS: #1=POS / #2=NEG
General Purpose
UL:
CSA:SENSOR APPROVALS:
(GROUND)
RED-2
BLACK-2
BLACK-3
(GROUND)
RED-1
BLACK-1
(GROUND)
ZERO POINT MARK
ZERO POINT MARK
(2 WIRE ONLY)
TRANSMITTER - REAR VIEW 2-WIRE CONNECTION
ZERO: POTENTIOMETER P1 FOR
ZERO POINT
POTENTIOMETER P2 FOR
MEASURING RANGE AND
VALUE
SPAN:
SWITCH FOR REVERSING
ROTATION (NOT
APPLICABLE)
S1:
7720 Series
7720 series inductive slot sensor
All 7720 Series owmeters may be tted with one or two inductive slot
sensors. Inductive slot sensors are 2-wire, DC, low current devices and
are designed to be used with a remote barrier / switch isolator capable
of powering the sensor and providing the desired switching option(s).
Barrier / switch isolators are available with 220VAC, 110VAC or 24VDC
supply voltage requirements, contain single pole double throw (SPDT )
relays, and are DIN rail mountable. (Only 24VDC units are actually
powered by the rail.) See barrier / switch isolator specications for
electrical connections and further details.
inductive slot sensor-electrical
speciFications
electrical connections
TYPE: INDUCTIVE
SUPPLY VOLTAGE: 5-25V DC (Switch Isolator)
OUTPUT: NAMUR
OUTPUT LOAD CURRENT: <= 1mA-Float Present
>= 3mA (15mA Max.)-Float Absent
SWITCHING FREQUENCY: 2kHZ
HOUSING RATING: IP67
WIRING: 2 Conductor, NAMUR
POS=BROWN / NEG=BLUE
TERMINALS: #1=POS / #2=NEG
PEPPERL+FUCHS UL: General Purpose
SENSOR APPROVALS CSA: General Purpose
setting alarM trigger points
1) Remove the eight screws securing the SHIELD.
2) Remove the SHIELD.
3) Carefully loosen the ALARM NUT. (Loosen just enough to rotate the
ALARM SENSOR BRACKET).
4) Carefully rotate the ALARM SENSOR BRACKET to the desired alarm
set point. If the meter has DUAL ALARMS, set the LOW ALARM set
point and then the HIGH ALARM set point.
5) Tighten the ALARM NUT.
6) Replace the SHIELD and secure with the eight screws.
When it comes to ow...we’re instrumental.
Installation Instructions
BLACK-2
(GROUND)
RED-1
BLACK-1
BLACK-3
(GROUND)
RED-2
RED-1
BLACK-1
(714) 891-0008 • www.kinginstrumentco.com
BLACK-2
BLACK-1
RED-1
BLACK-2
(GROUND)
ALARM
(GROUND)
BROWN
BLUE
BLACK-1
RED-1
7720 series asseMbly
inductive slot sensor
parts list:
1. Shield Screw
2. Shield Screw O-Ring
3. Shield With Gasket
4. Indicator Housing/
Meter Tube Assembly
5. Pointer Hub and
Pointer Needle
6. Alarm Nut
7. Alarm Sensor Bracket
BLACK-3
(GROUND)
BROWN
BLUE
ALARM
SENSOR
(HIGH)
RED-2
BLACK-2
ALARM
SENSOR
(LOW)
BROWN
BLUE
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7720 Series
To convert the measured flow into a 4-20 mAdc signal, an angle of rotation
transmitter is mounted to the indicator. This device is factory calibrated to
ensure accuracy and should only be adjusted by King Instrument
Company.
4-20 mA TRANSMITTER SPECIFICATIONS:
POWER SUPPLY:
MAXIMUM CURRENT CONSUMPTION:
TEMPERATURE LIMITS:
OUTPUT:
12-33V DC
40 mA
-13°F to 158°F (-25°C to 70°C)
4 to 20 mAdc
ACCURACY: <=0.5%
LINEARITY: +/- 0.4%
INFLUENCE FROM BEARING: +/- 0.1%
ELECTRICAL CONNECTIONS:
V-V+OUT
ext
R
H
TEMPERATURE INFLUENCE (AMBIENT): +/- 0.03% per degree C
POWER SUPPLY INFLUENCE: +/- 0.1%
LOAD RESISTANCE INFLUENCE: +/- 0.03% at R max.
12-33V DC
40 mA
-13°F to 158°F (-25°C to 70°C)
4 to 20 mAdc
Installation Instructions
7720 series 4-20 ma transMiter
To convert the measured ow into a 4-20 mAdc signal, an angle of
rotation transmitter is mounted to the indicator. This device is factory calibrated to ensure accuracy and should only be adjusted by
King Instrument Company.
4-20 Ma transMitter speciFications:
POWER SUPPLY: 12-33V DC
MAXIMUM CURRENT CONSUMPTION: 40 mA
TEMPERATURE LIMITS: -13°F to 158°F (-25°C to 70° C)
OUTPUT: 4 to 20 mAdc
ACCURACY: <=0.5%
LINEARITY: +/- 0.4%
INFLUENCE FROM BEARING: +/- 0.1%
TEMPERATURE INFLUENCE (AMBIENT): +/- 0.03% per degree C
POWER SUPPLY INFLUENCE: +/- 0.1%
LOAD RESISTANCE INFLUENCE: +/- 0.03% at R max.
electrical connections:
setting the output range
Initial adjustment to the transmitter is made during mounting by
aligning the housing and shaft zero points. Fine tuning of the device
using the”ZERO” and “SPAN” potentiometers are competed after all
electrical connections are checked and power is supplied to transmitter. The “ZERO” potentiometer is adjusted using a watchmakers
screw driver to set the minimum output, 20 mAdc, the pointer is
rotated to full scale ow and the “SPAN” potentiometer is adjusted.
This process is repeated until the full current range has been veried.
ZERO
OUT
SPAN
S1
-
V
+
TRANSMITTER
TRANSMITTER HOUSING
ZERO POINT MARK
TRANSMITTER SHAFT
ZERO POINT MARK
BLACK WIRE (-)
RED WIRE (+)
transMitter - rear view
ZERO: POTENTIOMETER P1 FOR
ZERO POINT
SPAN: POTENTIOMETER P2 FOR
MEASURING RANGE AND
VALUE
S 1: SWITCH FOR REVERSING
ROTATION (NOT APPLICABLE)
JUMPER WIRE
(2 WIRE ONLY)
V-V+OUT
R
ext
H
When it comes to ow...we’re instrumental.
2-wire connection
R
POWER SUPPLY (V) -12V
OUTPUT SIGNAL (mA)
H: DC POWER SUPPLY
(12V-33V)
ext: EXTERNAL RESISTANCE =
(714) 891-0008 • www.kinginstrumentco.com
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