Novus WL420 User manual

NOVUS AUTOMATION 1/3
Submersible Hydrostatic Level
Transmitter
LEVEL TRANSMITTER
– OPERATION MANUAL – V1.0x D
INTRODUCTION
Submersible Hydrostatic Level Transmitter is designed for
continuous monitoring of liquid level in water wells, reservoirs, tanks,
boreholes, rivers and other liquids. The submersible unit will detect
the hydrostatic pressure at the bottom of the liquid and transmit a
proportional current signal to the water column for system
instrumentation.
The highly stable 316L stainless steel diaphragm sensor is
compatible with raw or chlorinated water and most semi-aggressive
liquids and oils.
Several level measurement ranges are available and allow a wide
range of applications, such as installation on local or remote panels
and use with data loggers or PCLs.
TECHNICAL SPECIFICATION
Pressure Range 1 ... 100 m WC (1, 1.6, 2.5, 4, 6, 10,
16, 25, 40, 60 and 100 m WC)
Cable Length
5 ... 120 m (5, 10, 15, 20, 30, 40, 50,
80 and 120 m)
Sensor
Piezoresistive diaphragm
Analog Output
4-20 mA
Accuracy 0.5 % F.S. @25°C
Cable
Pur (polyurethane) 2x conductor,
shield and ventilation tube
Temperature
Compensation
0 m ~ 10 m WC: 0 to ~60 °C
10 m ~ 200 m WC: -10 to ~70 °C
Zero temp. coefficient ± 1.5 % F.S. (
within temperature
compensation)
Span temp. coefficient ± 1.5 % F.S. (
within temperature
compensation)
Mechanical Vibration 20 g (20~500 HZ)
Mechanical Shock 20 g (11 ms)
Insulation
100 MΩ / 250 VDC
Response Time
≤1 ms (Up to 90 % F.S.)
Long Term Stability
±0.2 % F.S./year
Operating
Temperature
0 to 60 °C
If measuring range < 4 m WC
-10 to 70 °C
If measuring range ≥4 m WC
Storage Temperature
-40 to 125 °C
Power Supply
Loop-powered
4-20 mA (12 ~ 36 Vcc)
Housing Material
Sensor: SS 316L
Housing: SS 304
Protective cover: SS 304
Dimensions
Height: 105 mm
Diameter: 26.5 mm
Level of Protection
IP68
Overpressure Limit
<=6 m WC: 3x F.S.
>=10 m WC: 2x F.S.
Electrical Protection
Reverse polarity and current limiter
Certification
CE, UKCA, RoHS
Warranty 1 year
Table 01 – Technical specification
IDENTIFICATION
The Submersible Hydrostatic Level Transmitter has the following
identification engraving on the sensor body:
Fig. 01 – Identification engraving
Attached to the end of the cable is an identification tag:
Fig. 02 – Identification tag
And it is supplied in the following models:
MODEL PRESSURE
RANGE
OVER-
PRESSURE
BURTS
PRESSURE CABLE
WL420-1M-L5
1 m WC
300 % F.S.
600 % F.S.
5 m
WL420-1M-L15
1 m WC
300 % F.S.
600 % F.S.
15 m
WL420-1.6M-L5
1.6 m WC
300 % F.S.
600 % F.S.
5 m
WL420-1.6M-L15
1.6 m WC
300 % F.S.
600 % F.S.
15 m
WL420-2.5M-L5
2.5 m WC
300 % F.S.
600 % F.S.
5 m
WL420-2.5M-L15
2.5 m WC
300 % F.S.
600 % F.S.
15 m
WL420-4M-L10
4 m WC
300 % F.S.
600 % F.S.
10 m

Submersible Hydrostatic Level Transmitter
NOVUS AUTOMATION 2/3
WL420-4M-L15
4 m WC
300 % F.S.
600 % F.S.
15 m
WL420-6M-L10
6 m WC
300 % F.S.
600 % F.S.
10 m
WL420-6M-L15
6 m WC
300 % F.S.
600 % F.S.
15 m
WL420-10M-L15
10 m WC
200 % F.S.
500 % F.S.
15 m
WL420-10M-L20
10 m WC
200 % F.S.
500 % F.S.
20 m
WL420-16M-L20
16 m WC
200 % F.S.
500 % F.S.
20 m
WL420-16M-L30
16 m WC
200 % F.S.
500 % F.S.
30 m
WL420-25M-L40
25 m WC
200 % F.S.
500 % F.S.
40 m
WL420-40M-L50
40 m WC
200 % F.S.
500 % F.S.
50 m
WL420-60M-L80
60 m WC
200 % F.S.
500 % F.S.
80 m
WL420-100M-L120
100 m WC
200 % F.S.
500 % F.S.
120 m
Table 02– Models
MECHANICAL INSTALLATION
The Submersible Hydrostatic Level Transmitter transmitter is
suitable to be installed in places with static pressure levels such as
liquid tanks, sewers, swimming pools, boreholes, rivers, sea and
lakes.
DIMENSIONS
Fig. 03 shows the device dimensions:
Fig. 03 – Transmitter dimensions
ELECTRICAL INSTALLATION
Fig. 04 shows the transmitter cable connections:
Fig. 04 – Transmitter cable
Table 03 shows the composition of the cable:
Function Color
1 Output current Blue wire
2
Power supply Red wire
3
Vent tube
Red tube
Table 03– Cable composition
Fig. 05 shows the electrical connections required for installing the
device:
Fig. 05 – Electrical connections
RECOMMENDATIONS FOR INSTALLATION
•During installation, do not obstruct the connection cable vent.
•Input signal conductors must run through the system floor plan
separately from the output and supply conductors. If it is
possible, in grounded conduits.
•The instruments must be powered from the instrumentation
power supply circuit.
•In control and monitoring applications is essential to consider
what can happen when any part of the system fails.
•It is recommended the use of suppressors in contact coils,
solenoids and any inductive load.
INSTALLATION INSTRUCTIONS
STILL WATER INSTALLATION
Fig. 06 – Still water installation
1) When measuring the level of stationaty fluid in an open
container, place the Submersible Hydrostatic Level
Transmitter vertically into the bottom of the container.

Submersible Hydrostatic Level Transmitter
NOVUS AUTOMATION 3/3
2) When the average viscosity is relatively high (such as in a
sewage pool), you can install a bracket to ensure that the
transmitter is positioned at the bottom of the container.
3) When doing an outdoor installation, the junction box of the
transmitter must be placed in a ventilated, dry place to avoid
direct exposure to light and rain, which could cause the junction
box temperature to be too high or allow water to enter and
consequent damage to the internal circuit board.
MOVING WATER INSTALLATION
Fig. 07 – Moving water installation
1) When there is a lot of variation when measuring the level in
running water, you can insert a steel tube with an internal
diameter of about 50 cm into the channel. In addition, several
holes of about Φ5in diameter should be made in the submerged
part of the tube, on the side opposite the direction of flow. This
helps to avoid oscillations in the level measurement.
Fig. 08 – Damping device
2) When the water channel is very uneven or there is a lot of
sediment in the bottom, you can install a damping device to filter
it out. This eliminates the adverse effects of dynamic pressure
and ensures measurement accuracy.
3) It is recommended to install lightning protection devices where
the Submersible Hydrostatic Level Transmitter will be
installed. It is also recommended that the device and power
supply be properly grounded to reduce lightning damage to the
transmitter.
WARRANTY
Warranty conditions are available on our website
www.novusautomation.com/warranty.