Kobold NWP-1405 Series User manual

SAFETY PRECAUTIONS
Step One
Warranty Service and Repair
About this Manual:
PLEASE READ THE ENTIRE MANUAL PRIOR TO INSTALLING
ORUSINGTHISPRODUCT.Thismanualincludesinformationontwo
different models of Tuning Fork sensors from Kobold, all in the NWP
series.Pleaserefertothepartnumberlocatedonthesensorlabeltoverify
the exact model which you have purchased.
User's Responsibility for Safety:
Koboldmanufacturesawiderangeofliquidlevelsensorsandtechnolo-
gies.Whileeachof thesesensorsisdesignedtooperate inawidevariety
ofapplications,itistheuser'sresponsibilitytoselect asensormodelthat
is appropriate for the application, install it properly, perform tests of the
installedsystem,andmaintainallcomponents.Thefailuretodosocould
result in property damage or serious injury.
Proper Installation and Handling:
Use a proper sealant with all installations. Never overtighten the sensor
withinthefitting,beyondamaximumof80inch-poundstorque.Always
check for leaks prior to system start-up.
Material Compatibility:
The NWP series sensor is available in one wetted material version. The
bodyof the model NWP-1405 is made of PP (Polypropylene)
with the forks made of PPS (40% glass filled). Make sure that
the model which you have selected is compatible with the application
liquids.Todeterminethechemicalcompatibilitybetweenthesensorand
itsapplicationliquids, refer to the CompassCorrosion Guide, available
from Compass Publications (619-589-9636).
Temperature and Pressure:
The NWP series sensor is designed for use in application temperatures
up to 90 °C, and for use at pressures up to 150 psi @ 25 °C., derated @
1.667 psi per °C. above 25 °C.
Wiring and Electrical:
The supply voltage used to power the NWP series sensor should never
exceedamaximumof36voltsDC.Electricalwiringofthesensorshould
beperformed in accordance with allapplicable national, state, and local
codes.
Flammable, Explosive and Hazardous Applications:
The NWP series sensor should not be used within flammable or explo-
sive applications. In hazardous applications, use redundant measure-
ment and control points, each having a different sensing technology.
WARNING
Do not squeeze the forks together. Doing so could
damage or break the sensor and void the warranty.
If for some reason your product must be returned for factory service,
contact your Kobold distributor to receive a material return authori-
zationnumberfirst,andprovidethemwiththefollowinginformation:
1. Part number, serial number
2. Name and telephone number of a person who can answer
questions related to the product and its application
3. Return shipping address
4. Brief description of the symptom
5. Brief description of the application
Once you have received a return authorization form, ship the product
prepaid in its original packing to:
KOBOLD Instruments Inc.
1801 Parkway View Drive
Pittsburgh, PA 15205
Pleaseincludeanyrelatedsymptomandapplicationinformationwith
your product. This information enables our service technicians to
process your repair order as quickly as possible.
Tuning Fork Sensor
NWP-1405 Series
Owner’s Manual
KOBOLD
Version 2.1
12/2013, All rights reserved.
Part # NWP_1405_Manual
Order from:
C A Briggs Company
622 Mary Street; Suite 101
Warminster, PA 18974
Phone: [phone]
Fax: [phone]
[e-mail] - www.cabriggs.com

ORIENTATIONINSTALLATION
Step Two Step Three
WheninstallingtheNWP,makesurethattheforksdonottouchthewalls
of the tank. Consider possible build up along the inner tank wall.
Through Wall Installation:
Kobold’s NWP series sensors may be installed through the top, side or
bottomof a tank wall. Thesensor has male 3/4" NPTthreads on either side
ofa15/16"wrenchflat.Thisenablestheusertoselectthesensor’smounting
orientation, installed outside of the tank in, or inside of the tank out.
Higher viscosity liquids may build up inside of a flange and cause the
NWP to fail wet.
If installing the tuning fork within a pipe, make sure the forks allow the
liquid to flow between them and not around them.
When installing the NWP horizontally, make sure that the forks orien-
tation is vertical and not horizontal.
Side ViewSide View
Side View
Side View

Step Four Step Five
WIRING WIRING
[Dry Condition]
Sensor
(NO)
RED
GRN
SHLD
WHT
BLK
LOAD
LOAD OR
[+]
[-]
[Dry Condition]
Sensor
(NC)
BLK
GRN
SHLD
WHT
RED
LOAD
LOAD OR
[+]
[-]
[Dry Condition]
Sensor
(NO)
RED
GRN
SHLD
WHT
BLK
LOAD [AC Power]
[+]
[-]
[Dry Condition]
Sensor
(NC)
BLK
GRN
SHLD
WHT
RED
LOAD [AC Power]
[+]
[-]
Wiring the Relay Output:
The NWP-1405 relay output can be wired as a dry contact to a
VDC or VAC power source. The NWP-1405 does require 12 - 36VDC
power to operate the sensor and switch the relay. All illustrations
below identify a dry switch state as the normal position of the relay.
Switching a Normally Open DC Load:
The Red wire connects to Positive (+) of the power supply and the
Black wire connects to Negative (-). The LOAD can be attached to
either the Green or White wires. Complete the circuit by either con-
necting the Green to (+) VDC power or White to (-) VDC power (see
illustration below).
Switching a Normally Closed DC Load:
The Black wire connects to Positive (+) of the power supply and the
Red wire connects to Negative (-). The LOAD can be attached to
either the Green or White wires. Complete the circuit by either con-
necting the Green to (+) VDC power or White to (-) VDC power (see
illustration below).
Switching a Normally Open AC Load:
The Red wire connects to Positive (+) of the DC power supply and the
Black wire connects to Negative (-). The LOAD can be attached to
the Green wire and the Hot of the VAC power. Connect the White to
the Neutral of the VAC power (see illustration below).
Switching a Normally Closed AC Load:
The Black wire connects to Positive (+) of the DC power supply and
the Red wire connects to Negative (-). The LOAD can be attached to
the Green wire and the Hot of the VAC power. Connect the White to
the Neutral of the VAC power (see illustration below).
Supply Voltage:
The supply voltage to the NWP-1405 level switch should never
exceed a maximum of 36 VDC.
Alternative controllers and power supplies, with a minimum output
of 12 VDC up to a maximum output of 36 VDC, may also be used with
the NWP-1405 level switch.
Required Cable Length:
Determine the length of cable required between the NWP-1405
level switch and its point of termination. Allow enough slack to
ensure the easy installation, removal and/or maintenance of the sen-
sor. The cable length may be extended up to a maximum of 1000 feet,
using a well-insulated, 14 to 20 gauge shielded four conductor cable.
Wire Stripping:
Using a 10 gauge wire stripper, carefully remove the outer layer of
insulation from the last 1-1/4" of the sensor's cable. Unwrap and dis-
card the exposed foil shield from around the signal wires, leaving the
drain wire attached if desired. With a 20 gauge wire stripper, remove
the last 1/4" of the colored insulation from the signal wires.
Signal Outputs (Current sensing):
This method, when used with an appropriate controller,uses only
two wires (Red and Black). The sensor draws 5 mAwhen it is dry,
and 19 mA when wet. NC/NO status must be set by the controller. The
White and Green wires are not used.
Signal Output (Relay switching):
Allows the sensor to switch a small load on or off directly, using an
internal 1Arelay (60 VAC/60 VDC). The NWP-1405 level switch
relay utilizes 4 wires (red, black, white and green) and a bare shield
wire. The NO/NC status is set by the polarity of the voltage feeding
the red and black wires. The green wire is the common for the relay
and the white wire is the NO or NC, depending on the polarity of red
and black.
Red
Black
Shield
Ground
24 VDC
Power Supply
+
-
Multimeter
(Continuity)
-
+
White
Green
Red
Black
Shield
Ground
24 VDC
Power Supply
+
-
Multimeter
(mA)
-
+
Normally Open Wiring:
Black
Red
Shield
Ground
24 VDC
Power Supply
+
-
White
Green Multimeter
(Continuity)
-
+
Normally Closed
W
iring:

Step Seven
MAINTENANCE
General:
The NWP-1405 level switch requires no periodic maintenance
except cleaning as required. It is the responsibility of the user to
determine the appropriate maintenance schedule, based on the specif-
ic characteristics of the application liquids.
Cleaning Procedure:
1. Power: Make Sure that all power to the sensor, controller and/or
power supply is completely disconnected.
2. Sensor Removal: In all through-wall installations, make sure
that the tank is drained well below the sensor prior to removal.
Carefully, remove the sensor from the installation.
3.
Cleaning the Sensor: Use a soft bristle brush and mild deter-
gent, carefully wash the NWP-1405 level switch. Do not use
harsh abrasives such as steel wool or sandpaper, which might
damage the surface sensor. Do not use incompatible solvents
which may damage the sensor's PP, PFA, PVDF or PPS plastic
body.
4. Sensor Installation: Follow the appropriate steps of installa-
tion as outlined in the installation section of this manual.
Testing the installation:
1. Power: Turn on power to the controller and/or power supply.
2. Immersing the switch: Immerse the sensing tip in its applica-
tion liquid, by filling the tank up to the switches point of actua-
tion. An alternate method of immersing the switch during prelim-
inary testing is to hold a cup filled with application liquid up to
the switch's tip.
3. Test: With the switch being fluctuated between wet and dry
states, the switch indicator light in the controller should turn on
and off. If the controller doesn't have an input indicator, use a volt-
meter or ammeter to ensure that the switch produces the correct
signal.
4. Point of actuation: Observe the point at which the rising or
falling fluid level causes the switch to change state, and adjust the
installation of the switch if necessary.
Step Six
WIRING
Wiring as a P-Channel or N-Channel output:
The NWP-1405 can be substituted for either a P-Channel (PNP,
sourcing) output or a N-Channel (NPN, sinking) output.
Normally Open DC Load as a P-Channel Output:
To wire as a N/O P-Channel output, follow the directions below. The
Red wire connects to Positive (+) of the power supply and the Black
wire connects to Negative (-). The Green wire is jumpered to the Red
wire while the White wire is connected to the LOAD. Jumper the
LOAD back to the Negative (-) to complete the circuit.
[Dry Condition]
Sensor
(NO)
RED
GRN
SHLD
WHT
BLK LOAD
[+]
[-]
[Dry Condition]
Sensor
(NC)
BLK
GRN
SHLD
WHT
RED LOAD
[+]
[-]
[Dry Condition]
Sensor
(NO)
RED
GRN
SHLD
WHT
BLK
LOAD [+]
[-]
[Dry Condition]
Sensor
(NC)
BLK
GRN
SHLD
WHT
RED
LOAD [+]
[-]
Normally Closed DC Load as a N-Channel Output:
To wire as a NC N-Channel output, follow the directions below. The
Black wire connects to Positive (+) of the power supply and the Red
wire connects to Negative (-). The White wire is jumpered to the Red
wire while the White wire is connected to the LOAD. Jumper the
LOAD back to the Positive (+) to complete the circuit.
Normally Open DC Load as a N-Channel Output:
To wire as a NO N-Channel output, follow the directions below. The
Red wire connects to Positive (+) of the power supply and the Black
wire connects to Negative (-). The White wire is jumpered to the
Black wire while the Green wire is connected to the LOAD. Jumper
the LOAD back to the Positive (+) to complete the circuit.
Normally Closed DC Load as a P-Channel Output:
To wire as a NC P-Channel output, follow the directions below. The
Black wire connects to Positive (+) of the power supply and the Red
wire connects to Negative (-). The Green wire is jumpered to the
Black wire while the White wire is connected to the LOAD. Jumper
the LOAD back to the Negative (-) to complete the circuit.

Operating Pressure (psi)
Shield Ground : Bare
Maintenance : Yellow Rela y
Output : White
Rela y Commo n :
Green
Power : (+) Red (-) Black
8' Cable
SPECIFICATIONS
Step Eight
Accuracy: ± 2 mm in water
Repeatability: ± 1 mm in water
Frequency: 400 Hz (dry)
Supply voltage: 12-36 VDC
Consumption: Dry: 8 mA nominal
Wet: 19 mA nominal
Contact type:
Contact rating:
Contact output:
Temperature range:
Pressure range:
Probe material:
Probe rating:
Mounting threads:
Cable type:
(1) SPST relay
60 VAC/VDC @ 1A max.
Selectable NO/NC states
F: -40° to 194 °
C: -40° to 90°Order from: C A Briggs Company622 Mary Street; Suite 101; Warminster, PA 18974Phone: [phone]; Fax: [email protected] - www.cabriggs.com
, derated @ 1.667
psi per °C. above 25° C.
PP/PPS® (40% glass filled)
NEMA 6 / IP68
3/4" NPT
8 ft., 5-wire, 22 gauge with shield
ground & PP jacket
Dimensions
1.05"
.88"
1.14"
.55"
2.75"
1.98"
160
140
120
100
80
60
40
20
00
Temperature / Pressure Derating
Unacceptable
Range
Acceptable
Range
-20 00 20 40 60 80 100
Temperature (°C)
.50"
Technology
The Tuning Fork switch vibrates at a
nominal frequency of 400 Hz. As the
switch becomes immersed in a liquid or
slurry, a corresponding frequency shift
occurs. When the measured frequency
shift reaches an appropriate value, the
switch changes state indicating the
presence of a liquid or slurry medium.
0.35"
4.50"
.72"
.38"