NIVOPOINT MR Series Manuale utente
EXNB17ATEX0003X ♦mra1053a0600h_09 ♦1/2
NIVOPOINT
Manufacturer
H-1043 Budapest, Dugonics u. 11.
Phone: (36-1) 889-0100 Fax: (36-1) 889-0200
NIVELCO Process Control Co.
E-mail: sales@nivelco.com www.nivelco.com
Thank you for choosing a NIVELCO instrument.
We are sure that you will be satisfied throughout its use.
1. APPLICATION
The interaction of the magnetic float and the reed relays (incorporated in the protection tube) is the basis of
the NIVOPOINT magnetic float level switch series operation. They are suitable for level indication of normal
and explosive liquids, and can be used for level control tasks. The protecting tube contains a max. of 5
relays. Parts of the instrument are: probe tube with magnetic float and housing containing the connection
terminal.
The magnetic float moves alongside the protection tube tracking the level of the liquid and activating the reed
relays. As the float passes a relay it changes the output state of the relay which retains this state latching
until the level decreases and the float moves again along the respective relay to switch its state back.
2. TECHNICAL DATA
2.1. GENERAL DATA
TYPE MR – MP–
MR
–
-7
Ex
MR
–
-8
Ex
Insertion length 0.25 m ... 3 m
Material of wetted parts Stainless steel
(1.4571 / BS 316Ti)
PVDF float / PFA coated
probe
Stainless steel
(DIN 1.4571 / BS 316Ti)
Max. process pressure 2.5 MPa (25 bar) at +20 °C 0.3 MPa (3 bar) at +20 °C 2.5 MPa (25 bar) at +20 °C
Medium density min. 0.8
kg/dm3
min. 0.5
kg/dm3
min. 0.7
kg/dm3
min. 0.8
kg/dm3
Nominal float
dimensions / shape
∅52x59mm*
cylinder
∅96 mm*
ball
∅76x87 mm
cylinder
∅52x59 mm
cylinder
Medium temp. range -40 °C ... +150 °C -40 °C ... +80 °C See temperature classes table
Ambient temp. range -40 °C ... +95 °C -40 °C ... +95 °C
Output 1 ... 5 pcs reed-switches, connecting one side of each, NO/NC
Switching rate 120 W / VA, 250 V AC/DC, 3 A /reed relay, max. 9 A
Switch differential < 10 mm
Distance of switches min. 110 mm
Electrical connection M20 x 1.5 for cables ∅6 … ∅12
M20 x 1.5
for cables
∅9.5 … ∅10
without cable
gland
terminal, wire cross section: 0.5 … 2.5 mm2
Process connection 1", 1½", 2" BSP
1", 1½", 2" NPT
PP flange
DN 80, DN 100
1", 1½", 2" BSP
1", 1½", 2" NPT
Sealing material Klingerit 400 — Klingerit 400
Electrical protection Class I, Protecting cable 4 mm2
Ingress protection IP67 (as per EN 60529:2015)
Ex marking
—
II 2 G Ex d IIC T6 … T3 Gb
Dimension of the hous. 116 x 80 x 65 mm 124 x 80 x 65 mm
Mass 0.4 kg + 0.3 kg/fm 0.45 kg + 0.3 kg/fm
* dimensions of the float depend on the order
Note: the device must be installed with Ex d IIC certified explosion-proof cable gland.
2.2. ADDITIONAL DATA FOR EX APPROVED MODELS
CLASS T6 T5 T4 T3
Max. ambient temperature from –40 °C +65 °C +80°C +95 °C +95 °C
Max. medium temperature from –40 °C +80°C +95 °C +130 °C +150 °C
2.3. ACCESSORIES
−User’s Manual
−Certificate of Warranty
−Declaration of Conformity
−1 pc Gasket (for threaded versions)
2.4. ORDER CODE
NIVOPOINT M
–
–
***
TYPE CODE PROCESS CONNECTION CODE SWITCH POINT CODE LENGTH CODE LENGTH CODE FLOAT
/
EXCODE
Standard R 1” BSP
A
1 pc. NO/NC 10 m 00 m 0 *** / normal 3
Standard / plastic
coating and float P 2” BSP C2 pcs. NO/NC 21 m 10.1 m 1 ∅52
1.4571 / Ex 7
1” NPT D3 pcs. NO/NC 32 m 2::
2” NPT G 4 pcs. NO/NC 4 3 m 3 0.8 m 8 ∅52
8
1½" BSP B5 pcs. NO/NC 50.9 m 9 1.4571 / Ex
Notes: 1½" NPT E without
cable gland
** The order code of an Ex version should end in ’Ex’ *** Depends on the order: ∅52 / 1.4571, ∅96 /1.4571 MP version: ∅76 / PVDF
2/2 ♦EXNB17ATEX0003X ♦mra1053a0600h_09
2.5. DIMENSIONS
STANDARD VERSION MR- EX VERSION M
R
- STANDARD VERSION MP- TERMINAL BOX
~75
~175-230
min. 100
min. 118
L4
L3
L2
L1
Lnévl.
min.
110
min.
95
min.
11 3
"2 BSP/NPT
96
127
Ø96
±25 mm
"1 BSP/NPT
Ø124
~78
±25 mm
L5
min. 85
L4
L3
L2
L1
Lnévl.
min.
110
min.
80
~195,9 max. (-50 mm)
"2 BSP/NPT
"1 BSP/NPT
60
Ø53,5
~75
min. 130 mm
±25 mm
min. 95
L5
L4
L3
L2
L1
Lnévl.
min.
11 0
min.
90
Ø76
87
DN80
DN100
12345C
LEVEL
NO
NC
3. INSTALLATION
For mounting the unit 1", 1½", 2" BSP or NPT threads can be used. Minimal gap
diameter for the float is ∅55 mm. Use the M20x1.5 cable gland for electrical
connection.
The only version that can be installed without removing the float from the shaft
and reassembling it from the inside of the tank is the version with 2” (BSP or
NPT) process connection. If protection tube is used the minimum tube diameter
should be ∅75 mm (for insertion lenght < 1.5m and ∅95 mm for insertion
length > 1.5m). When using a ∅90 mm float the tube diameter should be min.
∅130 mm.
WARNING!
The sliding sleeve must not be loosened in tanks under pressure.
The unit should be mounted in vertical position via its process connection and
handled with care to avoid any damage or bend of the protection tube during
transportation or installation.
4. WIRING
Depending on the grounding system either the inner or the outer grounding
terminal should be connected to the EP network.
Standard version
Remove the cover. Feed the electrical cables through the cable gland and
connect them in accordance with the sketch on the cover where the (NO/NC)
states of the relays are marked. The terminal of the lowest switch point has to
be number 1.
„C” is common terminal.
The cross section of the connecting cable has to be between 0.5 and 2.5 mm2.
Ex version
Remove the safety clamp and screw the cover off. Feed the electrical cables
through the cable gland and connect them in accordance with the sketch on the
cover where the (NO/NC) states of the relays are marked.
Connect the grounding screw to the grounding system. Place the cover back
and fasten the safety clamp by setting it into one of the notches of the cover.
5. SET UP, ADJUSTMENT
After screwing in and before tightening the sliding sleeve the direction of the
cable gland and the position of the reed-relay set can be adjusted.
An open-end wrench should be used when loosening or screwing tight the
sliding sleeve. The position of the reed-relay set can be vertically adjusted by a
max. of ±25 mm.
5.1. SPECIAL CONDITIONS OF THE EX APPLICATION
The apparatus met the requirements specified for mechanical strength with
reduced impact energy (4 J = 1 kg; 0.4 m). On the basis of the above the place
and way of installation should guarantee the protection of the unit against
external mechanical impacts during service.
Before the installation of the device it must be equipped with a certified cable
gland with II 2 G Ex d IIC protection type. Prior to installing the Ex d certified
cable gland the red protection cap should be removed.
6. MAINTENANCE, REPAIR
The unit does not require regular maintenance. In some instances, however, the
probe may need occasional cleaning to remove surface deposits. This must be
carried out gently, without harming the probe.
All repairs will be carried out at the manufacturer’s premises.
7. STORAGE CONDITIONS
Ambient temperature: -20 °C ... +60 °C
mra1053a0600h_10
January, 2018
Nivelco reserves the right to change technical specifications without notice.
Questo manuale è adatto per i seguenti modelli
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