Nuova Fima ST Series User manual

Industrial instrumentation for Pressure and Temperature
ENG
MI-ST09_18_MA-ENG_3 01/2017
Copyright  Nuova Fima S.r.l.
All rights reserved. Any part of this publication should not be
reproduced without a written Nuova Fima’s S.r.l. approval
Via C. Battisti, 59/61 – 28045 INVORIO (No) – Italy
Tel. [phone] – Fax [phone]
www.nuovafima.com – e-mail: [email protected]
4123 Hollister, Suite G – TX 77080 Houston
Tel. [phone] – Fax [phone]
www.nuovafima.com – e-mail: [email protected]
User guide
PRESSURE TRANSMITTER ST

User guide
PRESSURE TRANSMITTER ST
2 NUOVA FIMA - Industrial instrumentation for Pressure and Temperature
Table of Contents
1. IMPORTANT INFORMATION ________________________________________________________________ 2
2. SAFETY INSTRUCTIONS ____________________________________________________________________ 2
3. INTENDED USE _____________________________________________________________________________ 3
4. ELECTRICAL CONNECTIONS _______________________________________________________________ 3
5. INSTALLATION ____________________________________________________________________________ 3
6. RECALIBRATION AND MAINTENANCE ______________________________________________________ 4
7. DISPOSAL __________________________________________________________________________________ 4
1. Important information
A careful reading of this instruction manual is strongly recommended before installation and use of the
instrument.
This manual must be stored in a safe and easily accessible place.
To operate in safe conditions, this instrument should be selected according to the intended application and should be
properly installed according to the manufacturer’s installation instructions.
The operators in charge of the instrument selection, installation and maintenance should be able to recognize what
conditions may affect the instrument functioning and that may lead to premature damage or failure
of it.
Plants regulations procedures need to be carried out by qualified operators. If used unproperly, the
instrument may damage and may be dangerous to operators and plant. In order to select the right
instrument, all products details can be found on the most updated edition of the general products
catalogue available on-line at www.nuovafima.com.
In accordance with directive Standards of reference: EN 61326
EMC 2014/30/EU – PED 2014/68/EU IEC 60770 – IEC 61298-2
2. Safety Instructions
- The manufacturer disclaims all responsibility in case of damages caused by the improper use of
the product and by the non-respect of the instructions reported in this manual.
- Follow carefully the specific safety rules in case of measuring oxygen pressure, acetylene,
inflammable or toxic gas or liquids.
- Disconnect the instruments only after depressurization of the system.
- The process fluids residuals remaining in the disassembled instruments components could affect
people, the environment and the system. Proper precautions are highly recommended.
- Before installation be sure that the right instrument has been selected following the working
conditions and in particular the range, the working temperature and the compatibility between the
material used and the process fluid.
- This manual does not concern the instruments conforming to standard 2014/34/EU (ATEX).
- The product warranty is no longer valid in case of non-authorized modifications and of unproper
use of the product.
- The user is totally responsible for the instrument installation and maintenance.
- Instruments employed for measuring toxic or inflammable fluids, should be handled and stored
with extreme care.

User guide
PRESSURE TRANSMITTER ST
NUOVA FIMA - Industrial instrumentation for Pressure and Temperature 3
3. Intended use
The pressure transmitter turns the input pressure into an output electrical signal. The electrical signal changes in
proportion to the input pressure level.
4. Electrical connections
EN 175301-803 Form A M12x1 Cable output
EN 175301-803 Form C
Output signal: 4...20 mA A
2
1
3
A out
+V in
123
4
A out A
+V in
Screen
A out
+V in
Brown
White A
N° of wires: 2
Charge (Ohm): RL – (Vin-10)/0,02
Input +Vin: 10…30
EN 175301-803 Form A M12x1 Cable output
EN 175301-803 Form C
Output signal: 0…5 Vdc 0…10 Vdc
+V in
1
-V in
2
3V
V out
+V in
2
4
13V
-V in
V out
+V in
Brown
Screen
White
Green
V out V
-V in
N° of wires: 3 3
Charge (Ohm): min.
5Koh
m
min.
10Koh
m
Input +Vin: 8…30 14…30
The transmitter metal case should always be connected to ground through the process connection thread in order to
protect it from disturbances due to electromagnetic fields or electrostatic charges.
If this procedure cannot be performed, the transmitter should be connected to the ground through the connector and
the cable screen.
5. Installation
Before installing an electric safety equipment into a plant or a system, the user should verify that the instrument is
suitable to the plant characteristics and that it is installed correctly. After installation procedure is finalized, the user
should verify that the instrument is not exposed to any source of heat that may exceed the established ambient limits.
Secure the instrument thread through a special key/wrench on the process connection hexagon without grasping the
case by the hands.
Secure the instrument thread through a special key/wrench on the process connection hexagon (20…30Nm). The
correct torque depends on the type of process connection and the type of seal used (form and material).
If the connection thread is conical the instrument is tightened through a simple screwing on the plug. In order to
improve the thread tightness, the male thread should be wrapped with a PTFE layer.
If the instrument is provided with a fluid diaphragm seal the connection should be clamped on the diaphragm
otherwise the calibration could be compromised.

User guide
PRESSURE TRANSMITTER ST
4 NUOVA FIMA - Industrial instrumentation for Pressure and Temperature
Connector Assembling EN 175301-803 Form A
Disassemble the connector as in fig.1 and connect the cable as in fig.2.
Reassemble the connector and fasten it to the transmitter.
Figure 1 – Exploded view of the connector Figure 2 – Wires connections
The IP grade according to standard CEI EN 60529 is guaranteed only if the female
connector equipped with a connection cable is mounted on the instrument and all
the other components are assembled correctly
6. Recalibration and maintenance
In some models the zero and the full scale range can be adjusted as follows:
S=span
Z=zero
- Connector disassembling (see fig. 1)
- Zero adjustment (Z)
- Span adjustment(S)
The ST transmitters is “maintenance free”.
In case of damage, contact NUOVA FIMA S.r.l. through the following service:
Product Return - www.nuovafima.com/en/product-return/
7. Disposal

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Instrument components and packaging materials must be disposed respecting the environment and observing the
specific national rules.