KING 7750 Series - Manual (Page 2)

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7750 Series
Installation Instructions
caution
• 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.
cleaning
Flange Connection: Carefully remove the flowmeter from piping
system. Remove the inlet float stop and outlet float stop and withdraw
float from top of meter. All necessary instrument components are now
fully accessible for cleaning with a bottle brush and appropriate mild
soap solution*. Before the meter is reassembled, inspect all parts for
damage.
To reassemble, carefully guide the magnetic float back into the tube.
Reinstall and tighten inlet float stop and outlet float stop. Reinstall the
instrument into the plumbing system.
FnPt Connection: Carefully remove the flowmeter from piping
system. Remove the inlet float stop and outlet float stop by twisting
and withdrawing from the top. Remove the float from top of meter. All
necessary instrument components are now fully accessible for clean-
ing with a bottle brush and appropriate mild soap solution*. Before
the meter is reassembled, inspect all parts for damage.
To reassemble, carefully guide the magnetic float back into the tube.
Reinstall and tighten inlet float stop and outlet float stop. Reinstall the
instrument into the plumbing system.
*Do not use cleaning agents that will damage float or tube.
Meters should be cleaned with a mild soap solution. This will be an
effective cleaner of rust stains. Caution must be used so that materials
of construction are not damaged by cleaning solutions. Hard water
deposits can be removed with 5% acetic acid solution (vinegar).
repair
7750 meters that require repair should be sent to the factory. Please
call for a Return Merchandise Authorization (RMA) number and return
instructions.
warning:
Pressure and temperature ratings are based on a study of the engi-
neering 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 difficult
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 specific application.
7750 series inductive slot sensor
All 7750 Series flowmeters may be fitted 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 specifications for
electrical connections and further details.
inductive slot sensor-electrical speciFications
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
Max non-Shock Pressure and temperature
temp Stainless Steel Flange Class
°F 150# psig 300# psig 600# psig
200 225 600 1,200
300 200 540 1,100
400 180 515 1,000
Note: The maximum ambient temperature for the indicator housing
is 158°F
**CAUTION: Meters with NPT (threaded) connections can be used in service
up to 1,500 psi and 400° F, but always make certain that materials of
construction (including O-Ring material) are compatible with the fluid to be
metered at the desired temperature and pressure.