Bühler technologies Nivotemp NT-M Series User manual

FluidControl
Installation and Operation Instructions
Original instructions
Level- and temperature switch
Nivotemp NT-M
BE100021
03/2017
Bühler Technologies GmbH, Harkortstr. 29, D-40880 Ratingen
Tel. [phone] / 49 89-0, Fax: [phone] / 49 89-20
E-Mail: [email protected]
Internet: www.buehler-technologies.com

Bühler Technologies GmbH, Harkortstr. 29, D-40880 Ratingen
Tel. [phone] / 49 89-0, Fax: [phone] / 49 89-20
Internet: www.buehler-technologies.com
E-Mail: [email protected]
Read this instruction carefully prior to installation and/or use. Pay at-
tention particularly to all advises and safety instructions to prevent in-
juries. Bühler Technologies can not be held responsible for misusing
the product or unreliable function due to unauthorised modifications.
All rights reserved. Bühler Technologies GmbH 2017
Document information
Document No...........................................................BE100021
Version..........................................................................03/2017

Nivotemp NT-M
Contents
1 Introduction..................................................................................................................................................................................................................... 2
1.1 Intended Use.........................................................................................................................................................................................................2
1.2 Functionality......................................................................................................................................................................................................... 2
1.2.1 Fill level monitoring.............................................................................................................................................................................2
1.2.2 Temperature monitor .........................................................................................................................................................................2
1.3 Design types.......................................................................................................................................................................................................... 2
1.4 Model key NT-M ................................................................................................................................................................................................... 3
1.5 Model key NT-M with analogue output for temperature....................................................................................................................... 3
1.6 Scope of Delivery.................................................................................................................................................................................................. 3
2 Safety instructions.........................................................................................................................................................................................................4
2.1 Important advice.................................................................................................................................................................................................4
2.2 General hazard warnings ................................................................................................................................................................................. 5
3 Transport and storage ..................................................................................................................................................................................................6
4 Setup and connection................................................................................................................................................................................................... 7
4.1 Installation ............................................................................................................................................................................................................ 7
4.2 Information on the correct operation of reed contacts in Bühler level switches.............................................................................8
4.3 Adjusting the level contacts.............................................................................................................................................................................9
5 Operation and control ................................................................................................................................................................................................ 10
6 Cleaning and Maintenance........................................................................................................................................................................................ 11
7 Service and repair..........................................................................................................................................................................................................12
7.1 Spare parts and accessories ........................................................................................................................................................................... 12
8 Disposal............................................................................................................................................................................................................................13
9 Appendices..................................................................................................................................................................................................................... 14
9.1 Technical Data NT-M ........................................................................................................................................................................................ 14
9.2 NT-M connector ..................................................................................................................................................................................................15
9.3 Standard pin assignment NT-M.................................................................................................................................................................... 16
9.4 Technical Data NT-M with analogue output for temperature .............................................................................................................17
9.5 Connector NT-M with analogue output for temperature......................................................................................................................17
10 Attached documents................................................................................................................................................................................................... 18
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1 Introduction
1.1 Intended Use
Level switches are used to monitor the fill level and temperature in fluid systems.
Level switches must not be used in highly flammable or corrosive liquids.
The medium must not contain particles, particularly metallic particles, to prevent deposits on the float or between the float and
switching tube. If necessary, filter the medium.
Please note the technical data in the appendix for the specific intended use, existing material combinations, as well as temper-
ature limits.
WARNING
All device models are solely intended for industrial applications. They are not safety com-
ponents. The devices must not be used if failure or malfunction thereof jeopardises the
safety and health of persons.
Use in explosive areas is prohibited.
1.2 Functionality
1.2.1 Fill level monitoring
The measuring tube is located inside the tank. The level switches are located inside the measuring tube. These are activated by a
magnet inside the level switch float.
The contacts are locked into a bent rail, spaced as specified in the purchase order, but can be moved if necessary.
1.2.2 Temperature monitor
The temperature is monitored via thermal element mounted to the end of the rail. Choose from temperature contacts with
fixed increments or a resistance thermometer (Pt100).
In the case of continuous temperature measurement (model key "KT"/temperature transmitter) an analogue signal between 4
and 20mA is output.
When equipped with resistance thermometer (model key "Pt100") the temperature is output using the change in resistance
(0°C = 100Ω) of the Pt100.
1.3 Design types
The level switch can be equipped with the following options:
OV Oval flange
FL Flange
G1 Adapter G3/4 to G1” flange
G1 as direct screw-in unit
Please refer to the type plate for your equipment configuration. In addition to the job number, this also contains the item num-
ber and type designation.
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1.4 Model key NT-M
Model designation
Version
MS
VA
= brass
= stainless steel
Plug **
M3
GS4
M12
C7
280
370
500
Variable (please specify)
Number of level contacts
1-4
K8
W9
NC/NO
change-over contact (max. 2)
1st temperature signal
NC contact NO contact
TM50NC
TM60NC
TM70NC
TM80NC
TM50NO
TM55NO
TM60NO
TM70NO
TM80NO
= 50 °C
= 55 °C
= 60 °C
= 70 °C
= 80 °C
TM50NC
TM60NC
TM70NC
TM80NC
TM50NO
TM55NO
TM60NO
TM70NO
TM80NO
= 50 °C
= 55 °C
= 60 °C
= 70 °C
= 80 °C
2nd Temperature contact
NO contact
NC contact
= oval flange (for G3/4)
= adapter G3/4 to G1
OV
G1
not with VA version
see "Connector"
only available with G3/4 connector
Cannot be combined with temperature contact
*
**
***
****
NT M
Contact type
Options
B
A
****
-- - - ----
XX XX XX XX XX XX
Connection
G3/4
G1
FL
OV
Length
-XX
Temperature contact
Pt100 = temperature sensor
(double temperature contact only)
***
***
*
*
*
1.5 Model key NT-M with analogue output for temperature
Model designation
Version
MS
= brass
Plug
M12
2M12
280
370
500
Variable (please specify)
Number of level contacts
1 or 2
K8 NC/NO
= oval flange (for G3/4)
= adapter G3/4 to G1
OV
G1
NT M
Contact type
Options
-- - - --
MS G3/4 XX XX XX KT
Connection
G3/4
Length
-XX
Temperature (4-20 mA)
Analogue output
-XX
1.6 Scope of Delivery
– Level switch
– Product documentation
– Connection/mounting accessories (optional)
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2 Safety instructions
2.1 Important advice
Operation of the device is only valid if:
– the product is used under the conditions described in the installation- and operation instruction, the intended application
according to the type plate and the intended use. In case of unauthorized modifications done by the user Bühler Technolo-
gies GmbH can not be held responsible for any damage,
– when complying with the specifications and markings on the nameplates.
– the performance limits given in the datasheets and in the installation- and operation instruction are obeyed,
– monitoring devices and safety devices are installed properly,
– service and repair is carried out by Bühler Technologies GmbH,
– only original spare parts are used.
This manual is part of the equipment. The manufacturer keeps the right to modify specifications without advanced notice. Keep
this manual for later use.
Signal words for warnings
DANGER
Signal word for an imminent danger with high risk, resulting in severe injuries or death if not avoided.
WARNING
Signal word for a hazardous situation with medium risk, possibly resulting in severe injuries or death if not
avoided.
CAUTION
Signal word for a hazardous situation with low risk, resulting in damaged to the device or the property or
minor or medium injuries if not avoided.
NOTICE
Signal word for important information to the product.
Warning signs
These instructions use the following warning signs:
Warns of a general hazard Unplug from mains
Voltage warning Wear respiratory equipment
Warns not to inhale toxic gasses Wear a safety mask
Warns of corrosive liquids Wear gloves
General information
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2.2 General hazard warnings
The equipment must be installed by a professional familiar with the safety requirements and risks.
Be sure to observe the safety regulations and generally applicable rules of technology relevant for the installation site. Prevent
malfunctions and avoid personal injuries and property damage.
The operator of the system must ensure:
– Safety notices and operating instructions are available and observed,
– The respective national accident prevention regulations are observed,
– The permissible data and operational conditions are maintained,
– Safety guards are used and mandatory maintenance is performed,
– Legal regulations are observed during disposal.
Maintenance, Repair
Please note during maintenance and repairs:
– Repairs to the unit must be performed by Bühler authorised personnel.
– Only perform conversion-, maintenance or installation work described in these operating and installation instructions.
– Always use genuine spare parts.
Always observe the applicable safety and operating regulations in the respective country of use when performing any type of
maintenance.
The method for cleaning the devices must be adapted to the IP protection class of the devices. Do not use cleaners which could
damage the device materials.
DANGER Toxic, acidic gases/liquids
Protect yourself from toxic, corrosive gasses/liquids when performing any type of work.
Wear appropriate protective equipment.
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3 Transport and storage
Only transport the product inside the original packaging or a suitable alternative.
The equipment must be protected from moisture and heat when not in use. It must be stored in a covered, dry, dust-free room
at room temperature.
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4 Setup and connection
DANGER Electric voltage
Risk of electric shock
a) Always disconnect the unit from the mains before performing work.
b) Secure the equipment from accidental restarting.
c) The equipment may only be installed, maintained and put into operation by instruc-
ted, competent personnel.
d) Always observe the applicable safety regulations for the operating site.
DANGER Toxic, acidic gases/liquids
Protect yourself from toxic, corrosive gasses/liquids when performing any type of work.
Wear appropriate protective equipment.
4.1 Installation
Please note before installing the level switch!
After transport and delivery of the level switch, the switching status of the bistable contacts may be different than required for
proper operation.
Therefore slide the float for the level switch along the level switch tube from below immediately before installation.
This ensures all built-in bistable contacts have a clearly defined switching status (NC or NO).
The level switch comes fully assembled and can be mounted to the tank by screw-in thread or flange and mounting screws.
Please be sure the float can move freely and to leave enough space between the tank wall and add-ons.
After removing the float, where applicable, be sure the magnet inside the float is above the fluid level. This can easily be verified
with a piece of iron to determine the magnet position inside the float.
DANGER Electric voltage
Risk of electric shock
When connecting devices, please note the maximum voltages and currents currents (see
technical data) and use the correct wire cross-sections and circuit breakers.
When selecting the connection lines, also note the maximum operating temperatures of
the devices.
Installation in special areas of application:
If the device will be installed outdoors or in wet areas, the maximum operating voltage
is max. 16 V DC effective or 35 V DC.
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4.2 Information on the correct operation of reed contacts in Bühler level switches
Based on their construction, reed contacts are very long lasting and reliable components. Yet the following should be considered
when using them:
Life of reed switches
The life of reed switches can be up to 109 cycles. This is reduces by high stress and / or incorrect or the absence of protective cir-
cuits when switching inductive, capacitive or lamp loads.
It’s therefore important to ensure NEVER to exceed one or several of the maximum approved limits, even temporarily, and to
install a contact protective circuit for loads which are not purely ohmic. Using test lamps when installing the devices is also pro-
hibited, as these can temporarily allow too much current to flow, which can damage the reed contacts. In this case non-volatile
testing equipment should always be used.
Contact protective circuits for reed switches
For direct current voltage a recovery diode per figure A must be connected parallel to the contact.
For alternating current voltage an RC circuit per Figure B and Table 1 must be connected parallel to the contact.
A B
Load
Contact
Recovery diode
Load
Contact
RC circuit
Load in VA 10 25 50
Voltage at contact V R/Ohm C/µF R/Ohm C/µF R/Ohm C/µF
24 22 0.022 1 0.1 1 0.47
60 120 0.0047 22 0.022 1 0.1
110 470 0.001 120 0.0047 22 0.022
230 470 0.001 470 0.001 120 0.0047
Please note the max. voltage/load ratings of the respective level contacts!
Voltages and currents
All Bühler level contacts with reed switch can switch minimal Switching voltages of 10 µV and minimal switching currents of 1
µA.
The maximum values specified for the respective contact types apply.
Level contact with reed switches can therefore be used for SPS applications as well as for high loads (within the maximum lim-
its) without hesitation.
Contact material
All reed switches in Bühler level contacts use rhodium as the contact material for the actual contact areas.
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4.3 Adjusting the level contacts
(not available for type NT M-MS-OV-M3… with temperature contact or Pt100)
The contacts for level measurement are locked into a bent rail inside the protective tube. They are positioned as specified in the
purchase order, but can be moved to any position if necessary.
For devices with 230 V mains voltage:
DANGER Electrical voltage
Electrocution hazard.
a) Disconnect the device from power supply.
b) Make sure that the equipment cannot be reconnected to mains unintentionally.
c) The device must be opened by trained staff only.
d) Regard correct mains voltage.
– Disconnect the voltage supply.
– Disconnect the plug.
– Carefully pull the bent rail with contacts out the top.
NOTICE
On versions with earth wire, this is run as a loop and soldered to the protective tube
from the inside in the insertion direction. To prevent breaking off the earth wire it
should not be pulled all the way out.
– Mark the original contact position.
NOTICE
Never attempt to remove the contacts from the front of the bent rail, as this will damage
the glass body. Do not pull on the cables.
– Carefully slide the contacts to the desired position on the bent rail. Use a small screwdriver or similar tool to do so. Use a drop
of oil if the contacts are very tight. Please note the minimum spacing!
If the contacts are configured as NO contact (NO) or NC contact (NC), the contact function can be reversed by turning the con-
tacts 180°. The housing has symbols for NC contact and NO contact as well as an arrow. The arrow, which points up when in-
stalled, indicates the current contact function. The contact logic assumes the level switch is installed in an empty tank, i.e. it is
only in the operating position once filled.
Function NC contact
with falling level (NO)
Function NO contact
with falling level (NC)
Red marking down
Red marking up
– To reverse the switching function, slide the contact out the top or bottom of the bent rail, turn 180° and slide back in, and
slide into the desired position.
– If the earth wire was pulled out of the protective tube, first insert this wire into the protective tube.
– Make a loop of the additional cable length and carefully slide the bent rail back in.
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5 Operation and control
NOTICE
The device must not be operated beyond its specifications.
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6 Cleaning and Maintenance
This device is maintenance-free.
The method for cleaning the devices must be adapted to the IP protection class of the devices. Do not use cleaners which could
damage the device materials.
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7 Service and repair
This chapter contains information on troubleshooting and correction should an error occur during operation.
Repairs to the unit must be performed by Bühler authorised personnel.
Please contact our Service Department with any questions:
Tel.: [phone] or your agent
If the equipment is not functioning properly after correcting any malfunctions and switching on the power, it must be inspected
by the manufacturer. Please send the equipment inside suitable packaging to:
Bühler Technologies GmbH
- Reparatur/Service -
Harkortstraße 29
40880 Ratingen
Germany
Please also attached the completed and signed RMA decontamination statement to the packaging. We will otherwise be unable
to process your repair order.
You will find the form in the appendix of these instructions, or simply request it by e-mail:
[email protected].
7.1 Spare parts and accessories
Accessories
Item no. Description
9144 05 0010 Connecting cable M12x1, 4-pin, 1.5 m, angular coupling and straight plug
9144 05 0046 Connecting cable M12x1, 4-pin, 3.0 m, angular coupling and straight plug
9144 05 0047 Connecting cable M12x1, 4-pin, 5.0 m, angular coupling and strands
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8 Disposal
Dispose of parts so as not to endanger the health or environment. Follow the laws in the country of use for disposing of elec-
tronic components and devices during disposal.
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9 Appendices
9.1 Technical Data NT-M
Version MS VA Dimensions
Operating pressure: max. 1 bar * max. 1 bar
L1 = min. 40
L = 280 / 370 / 500 / max. 1000
L2 = min. 80
min. 50
59
G3/4 = SW 36
G1 = SW 41
3.5
* min. 80 with
2x temp. contact
G3/4 /
G1
Ø23.5
last contact
first contact
45
G3/4 = 16 G1 = 18
Ø4.5
2
~ 37
45
5
8
Ø52
43
Ø38
55
80
Ø55
Ø6.5
R13
Flange style
Oval flange
(NBR
seal)
Operating temperature: -20 °C to +80 °C -20 °C to +80 °C
Float: SK 161 SK 161
Min. fluid density: 0.80 kg/dm³ 0.80 kg/dm³
Lengths (all versions): 280, 370, 500 mm (standard)
variable to max. 1000 mm
Weight at L=500 mm: approx. 300 g approx. 350 g
* max. atmospheric for PA oval flange
Material
Float: NBR NBR
Immersion tube: Brass 1.4571
G3/4 connection: Brass 1.4571
G1 connection: Brass Brass
via adapter
Flange connection: Aluminium --
Oval flange: PA VA/brass
via adapter
Level switching output K8 W9
Max. number 4 2
Function: NO/NC* Change-over contact
Max. voltage: 230 V DC/V AC 48 V AC/V DC
Max. switching current: 0.5 A 0.5 A
Max. contact load: 10 VA 20 VA
Min. contact spacing: 40 mm 40 mm
*NO= falling NC contact / NC = falling NO contact
Optional temperature
Temperature contact: TM xx
Max. voltage: 230 V DC
Max. switching current: 2 A
Max. contact load: 100 VA
Function: NC NO
Switching point °C: 50/60/70/80 50/60/70/80
Switching point tolerance: ± 5 K ± 5 K
Max. hysteresis: 18 K ± 5 K 26/35/40/45 K ± 5 K
Temperature sensor
Pt100: DIN EN 60 751 (tolerance ± 0.8 °C)
Analogue output: See "Technical Data NT-M with Analogue
Output for Temperature"
Adapter
OV: Adapter to oval flange incl. seal and locking
nut
G1: Adapter G3/4 to G1
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9.2 NT-M connector
Connector M3 GS4 M12 C7
G3/4 X X X X
G1 X -* X -*
Flange X - X -
OV X -* X -*
* G3/4 connection with respective adapter
Dimensions
Connection schematic
3
12
PE
1
2 3
4
1
3
5
4
678
2
Number of pins 3-pin + PE 4-pin 4-pin 7-pin + PE
DIN EN 175301-803 61076-2-101 175201-804
Max. voltage 230 V AC / DC* 30 V DC 30 V DC 230 V AC / DC*
Degree of protection IP65 IP65 IP67** IP65
Cable fitting PG 11 PG 7 PG 11
Max. number of contacts
Level/temp. contacts 1 x K8, 1 x TK 2 x K8, 1 x TK 1 x K8, 1 x TK 3 x K8, 1 x TK
Level contacts only 2 x K8
1 x W9
3 x K8
1 x W9
2 x K8
1 x W9
4 x K8
3 x W9
*Max. 48 V AC / V DC for change-over contact. ** With moulded cable box.
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9.3 Standard pin assignment NT-M
M3 GS4 M12 C7
K8
Level contact(s)
W9
Level contact(s)
K8
Level contact(s) and
temperature contact
K8 / Pt100
Level- and temperature sensor
K8
Level- and temperature con-
tact(s)
W9
Level contact(s) and
temperature contact
W9 / Pt100
Level- and temperature sensor
The pin assignments shown always show the max. population possible for the respective plug connection.
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9.4 Technical Data NT-M with analogue output for temperature
Version MS Dimensions
Material
L1 = min. 40
L = 280 / 370 / 500 / max. 1000
L2 = min. 80
min. 50
50
3.5
SW36
Ø23.5
last contact
first contact
45
Ø32.3
57
A
Seal
Ø32.3
M12x1
Seal
29
16
G3/4
SK161
B
SW36
G3/4
29
16
M12x1 51
Float: NBR
Immersion tube: Brass
G3/4 connection: Brass
Level switching output K8
Max. number: 2
Function: NO/NC*
Max. voltage: 30 V DC
Max. switching current: 0.5 A
Max. contact load: 10 VA
Min. contact spacing: 40 mm
*NO= falling NC contact / NC = falling NO contact
Optional temperature
Temperature KT
Detector: PT100 Class B, DIN EN 60 751
Measuring range*: 0 °C to 100 °C
Operating voltage (UB): 10-30 V DC
Outlet: 4-20 mA
Max. burden Ω: = (UB-7.5 V)/0.02 A
*Other measuring ranges available upon request
Adapter
OV: Adapter to oval flange incl. seal and
locking nut
G1: Adapter G3/4 to G1
9.5 Connector NT-M with analogue output for temperature
Connector M12 2 x M12
Number of pins 4-pin 2 x 4-pin
DIN EN 61076-2-101 175201-804
Connection schematic
1 x level contact
and analogue output
2 x level contact
and analogue output
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10 Attached documents
– Declaration of conformity: KX100023
– RMA - Decontamination Statement
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