NIVELCO NIVOSWITCH R-2 Series User manual

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Thank you for choosing a NIVELCO instrument!
1. APPLICATION
NIVOSWITCH RF–2–, RF–3–vibrating forks are designed for detection of level of powders
and granules. When they are used as high or low fail safe switches overfilling and emptying of silos and other
containers can be prevented. The RF fork series (base model, insertion length = 125 mm [4.9"]) with cast forks
are recommended for small granules, while the RR fork series (base model, insertion length = 137 mm [5.4"])
with welded forks are recommended for larger granules. Dust-Ex versions of the R–300 forks with aluminum
housing are also available.
2. TECHNICAL DATA
2.1 GENERAL DATA
Type R–3–R–2–
Material of wetted parts 1.4571 stainless steel
Process connection As per order code
Housing material Powder-coated aluminum Plastic, PBT, fiberglass-reinforced
Temperature
ranges
Medium –40…+130 °C (–40…+266 °F); PP flange: –20…+90 °C (–4…+194 °F)
Ambient –40…+70 °C (–40…+158 °F)
Medium pressure Up to 40 bar (4 MPa, 580 psi) see: 2.5 diagram
Insertion length 125…3000 mm (5″…10 feet), as per order code
Medium density 0.01 kg/d m3(>0.7 S.G.)
Response
time
Getting immersed 0.5 sec
Getting free 1 sec at high-density setting (0.5 kg/dm3)
3 sec at low-density setting (< 0.5 kg/dm3)
Operating mode indicator Two-tone LED
Operating mode selection Switch for selecting HIGH or LOW fail-safe mode
Density adjustment Switch for selecting HIGH or LOW Density
Output (1) 1 or 2 SPDT relays
Relay 1: 250 V AC, 8 A, AC1 / Relay 2: 250 V AC, 6 A, AC1
Electrical connection (1)
2× M20x1.5 cable glands for Ø6…12 mm (Ø0.25″…0.5″) cable;
2× internally threaded ½″NPT connection for protective pipes.
Terminal blocks for max. 1.5 mm² (AWG16) wire cross section
Power supply (1) 20…255 V AC/DC
Power consumption DC: < 3 W
Electrical protection Class I
lngress protection IP67
Weight 1.3 kg + 1.2 kg/m (~2.86 lb + 1 lb/ft) 0.95 kg + 1.2 kg/m (~2 lb + 1 lb/ft)
(1) For Ex type, see chapter 2.2 Explosion protection, Ex markings, Ex limit data.
2.2 EXPLOSION PROTECTION,EX MARKINGS,EX LIMIT DATA
2.2.1 ATEX certificate, No. BKI16ATEX0011/1
R
–
3
–
B Ex
Ex marking II 1/2 D Ex ta/tb IIIC T140 °C Da/Db
Power supply (universal) 20…250 V AC (50/60Hz) or 20…50V DC
Electrical connection
2× M20x1.5 Ex ta IIIC cable glands for Ø7…12 mm (Ø0.28″…0.5″) cable;
2× terminal blocks for max. 1.5 mm² (AWG16) wire cross section
2× internally threaded ½″NPT connection for protective pipes
Temperature ranges Medium
–
40…+130 °C (
–
40…+266 °F)
A
mbient
–
40…+70 °C (
–
40…+158 °F)
Output 1× SPDT relay 250 V
A
C, 8 A, AC1
Reference document number rfm3010m060bh_09
2.3 ACCESSORIES
User’s manual – 2× M20x1.5 plastic cable gland
Warranty Card – 1× 2 mm (0.08″) thick KLINGER OILIT seal (only for 1" BSP-threaded process connection)
EU-Declaration of Conformity – 2× plug-in type, 3-pole terminal block (3× for models with 2 relays)
2.4 RESPONSE TIME –MEDIUM VISCOSITY DIAGRAM
2.5 PRESSURE –TEMPERATURE DIAGRAMS
Medium pressure (pT) – Medium temperature (TM)
Medium pressure (pT) – Medium temperature (TM) PP flange version

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2.6 ORDER CODES (NOT ALL COMBINATIONS POSSIBLE!)
NIVOSWITC R – – *
TYPE CODE PROCESS CONNECTION CODE HOUSING CODE PROBE LENGTH CODE OUTPUT
/
EXCODE
Cast fork F1" BSP M Aluminum
(powder-
coated)
3
125 / 137 mm 01 1× SPDT rela
y
0
Welded fork R1½" BSP H 200 / 175 mm 02 2× SPDT rela
y
A
1" NPT P 0.3…3 m 03…30 1× SPDT rela
y
/ Dust-Ex ta/tb IIIC B
1½" NPT N Plastic, PBT 2
DN50, PN16 PP DIN F
DN50, PN40 1.4571 DIN G * Ex versions are marked ‘Ex’ right after the type
designation on the label. 2"
A
NSI RF150 PP A
2"
A
NSI RF600 1.4571 B
JIS 10K 50A PP J
JIS 40K 50A 1.4571 K
1½" TriClamp T
2" TriClamp R
DN40 pipe couplin
g
D
DN50 pipe couplin
g
E
2" BSP C
2" NPT L
Components and accessories (sold separately)
NIVOSWITCH R P – 1 – 0
TYPE CODE SLIDING SLEEVE CODE APPLICATION CODE MATERIAL CODE
A
ccessories P 1½" BSP H For normal version 1
A
38 1
1½" NPT N For coated version 2 1.4571 2
2"
A
NSI A
2" BSP B
2" NPT C
DIN DN50 F
JIS 10K 50
A
J
NIVOSWITCH R P – 1 0 1 – 0
TYPE CODE ACCESSORIES CODE MATERIAL CODE
A
ccessories P Weld-in socket 1" BSP G 1.4571 1
Weld-in socket 1″NPT K
Magnetic test screwdriver S
2.7 DIMENSIONS
RFM–01–RFM–301–B EXRRH–01–
RRH
–
02
–
RF–02…30–RRH–03…30–
3. INSTALLATION
Protect the device from any mechanical damage. Before installing, it is advised to
test the operation of the level switch in a small sample of the material to set the
proper density.
Positioning: the plane of the prongs is
perpendicular to the marked plane of the
hexagonal neck.
For a 1″BSP connection, the position of the
prongs is irrelevant, use the sealing ring
provided.
If orientation of the fork is required (e.g., for piping, side mounting), seal with
Teflon (PTFE) tape to help positioning the prongs. For side mounting, vertical
positioning of the fork is suggested.
Do not use the housing to fasten the device!
When screwing the level switch into the tank,
use the hex nut part of the device.

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After screwing the device in tight, the housing can be rotated by hand (max. 300°),
to adjust the cable outlets to the required position.
It is recommended to mount the device vertically (at the top) to detect light, free-
flowing solids. Mounting on the side of the container is recommended only if the
prongs are easily freed from the medium. If the device is mounted on the side, it
must be mounted with the prongs positioned vertically. The caving and arching of
the material in the tank must also be considered to determine optimal installation
location.
The fork must be protected against falling material and material stuck between the
fork and the protection plate.
Recommended and false installations
4. WIRING
Use Ø6…12 mm (Ø0.25″…0.5″) diameter cables with max. 1.5 mm² (AWG16) wire
cross section and tighten cable glands as well as housing cover after installation,
to ensure IP67 sealing. Use the external or internal grounding screw terminal for
grounding the unit. Common cables must not be used for AC and DC voltage, as
well as for low and mains voltage.
5. ADJUSTMENT
Power
supply Fork
Operation mode
Output
(as per order code)
Switch pos. Status
LED
Yes
Immersed
HIGH red
45 6 78 9
De-energized
LOW green
45 6 7 8 9
Energized
Free
HIGH green
45 6 7 8 9
Energized
LOW red
45 6 78 9
De-energized
No Free or
immersed HIGH / LOW Not lit
45 6 78 9
De-energized
The mode indicator is still visible in the top view of the cover after the cover is
closed. After wiring and adjustment, check the seals and close the cover carefully!
6. SPECIAL CONDITIONS FOR SAFE USE
In dust explosion hazardous environment, the unit can only be powered on after
properly closing the housing cover and tightening the screws of the safety locking
clamp.
7. MAINTENANCE AND REPAIR
NIVOSWITCH vibrating forks do not require regular maintenance. In some
instances, however, the vibrating section may need to be cleaned from material
deposits. This must be carried out carefully.
The warranty card contains the terms and conditions. Before returning the device
for repairs, it must be cleaned thoroughly. The parts in contact with the medium
may contain harmful substances; therefore, they must be decontaminated. Our
official form (Returned Equipment Handling Form) must be filled and enclosed in
the parcel. Download it from our website www.nivelco.com. The device must be
sent back with a declaration of decontamination. A statement must be provided in
the declaration that the decontamination process was successfully completed and
that the device is clean from any hazardous substances.
8. STORAGE CONDITIONS
Ambient temperature: −40…+70 °C (−40…+158 °F)
Relative humidity: max. 98%
rfm301en21h09
October 2021
NIVELCO reserves the right to change anything in this manual without notice!