NIVELCO NIPRESS D 9 Series User manual

drc9122a0600h_01 - 1/3
Thank you for choosing NIVELCO instrument
We are convinced that you will be satisfied with our product!
1. APPLICATION
The NIPRESS D-900 series with ceramic internal sensor measure pressure and convert it into voltage and
current output can be used in either 2- and 3-wire systems. D-900 was especially designed for low system,
pressure measurement applications in plant and machine engineering, biogas plants, as well as laboratory
techniques. The pressure transmitter is suitable for measuring small system pressure, however due to its optional
Al₂O₃99.9% sensor it also offers high temperature, overpressure, and media resistance. Its modular
construction provides high flexibility to the user. Transmitters can be delivered with plug in display UNICONT
PLK-501 enabling on site reading. Ex versions are also available.
2. TECHNICAL DATA
GENERALDATA
TYPE D–9–2, –6 DRD – 92 – 3
Measurement range 0 – 20 bar (0 – 290 psig)
(according to the order code)
Overload capability
A
ccording to the order code
Accuracy pN≥0.6 bar: 0.25%;
0.5 %
Medium temperature -40 °C … +125 °C (-40 °F … +257 °F)
Ambient temperature (1) -25 °C … +85 °C (-13 °F … +185 °F)
(with integrated cable: -5 °C … +70 °C [+23 ° F … +158 °F])
Materials
of the
wetted parts
Sensor Aluminium oxide ceramic Al2O396 %
Optional: Al2O399.9 %
Sensor sealing FKM (Viton®)
Optional: EPDM
Process conn. Stainless steel 1.4404 (316L)
Housing Stainless steel 1.4404 (316L)
Optional: Stainless steel 1.4305 (304)
Outpu
t
2-wire 4
–
20 m
A
3- wire 0
–
10 V
Power supply (Usupply)(1) standard version: 9 – 32 V DC 12.5 – 32 V DC
Load resistance Rmax=[(USupply-USupply min.)/0.02 A], [Ω] Rmin= 10 kΩ
Process connection
A
ccording to the order code
Electrical connection ISO 4400, M12x1 (4-pin), integrated cable
Ingress protection IP65 (ISO 4400), IP67 (M12x1), IP68 (integrated cable with ventilation tube)
Electric protection Class III (SELV)
Mass ~0,2 kg (~0.44 lb)
(1) For information of Ex certified devices (D
 – 9  – 6 Ex), see Special data for Ex certified models’ chart
2.1 ACCESSORIES
User’s manual
Warranty Card
EU Declaration of Conformity
SPECIAL DATA FOR EX CERTIFIED MODELS (ONLY FOR 4–20 mA /2-WIRE)
Type D – 9 – 6 Ex
Ex marking (Pending.)
Ex reference document number (Pending.)
Ex power supply 10
–
28 V DC
Intrinsically safety data Uimax = 28 V DC, Iimax = 93 mA, Pimax = 660 mW, Ci≈27 nF, Li≈5 µH
The maximum interior capacity between the power supply connections and the metal housing is 27 nF.
Permissible medium temperature,
atmospheric pressure
Zone 0: -20 °C … +60 °C (-4 °F … +140 °F), 0.8 bar ≤patm ≤1.1 bar
Zone 1, 2: -20 °C … +70 °C (-4 °F … +158 °F)
For T6 application: -25 °C … 60 °C (-13 °F … +140 °F)
Connecting cable
(in case if the device equipped with an
integrated cable)
Cable capacitance: 160 pF/m
Cable inductivity: 1µH/m
2.2 ORDER CODE (NOT ALL COMBINATIONS POSSIBLE!)
NIPRESS D – 9 –
MEASURING METHOD CODE
PROCESS
CONNECTION CODE RANGE(1) /NOMINAL PRESSURE (bar) CODE ACCURACY CODE
OUTPUT / Ex CODE
Gauge R ¼" BSP A 0
–
0.04 / 2 O 0.25% (pN≥0.6 bar) 1 4
–
20 mA, 2-wire 2
A
bsolute (pN≥1 bar) E ½" BSP C 0
–
0.06 / 2 P 0.5% 2 0
–
10 V, 3-wire 3
½" NPT H 0
–
0.1 / 4 1 4
–
20 mA, 2-wire / Ex ia(2) 6
M20x1.5 J 0
–
0.16 / 4 R
0
–
0.25 / 6 2
(1)Custom measuring range, based on prior negotiations
(2)Ex versions are available upon special request
Note:
In case of non-standard applications, the sensor type, sealing and housing,
as well as the requirement for filling with food compatible oil has to be
specified in the order!
0
–
0.4 / 6 3
0
–
0,6 / 8 4
0 – 1 / 8 5
0
–
1.6 / 15 6
0
–
2.5 / 25 7
0 – 4 / 25 8
0
–
6 / 35 9
0
–
10 / 35 A
0
–
16 / 45 B
0
–
20 / 45 T

drc9122a0600h_01 - 2/3
2.3 DIMENSIONS
DC–9–2 DH–9–2
Transmitter +
PLK-501-2
Plug-in display
3. INSTALLATION
Due to its small size and weight the transmitter can be directly installed on tanks,
pipes, machines, etc. without any mounting aids.
To enable the safe replacement of the instrument during operation the use of closing
armature is recommended. A simple ball valve will be suitable for lower pressures
and for higher pressures (above 6 bar) a three-way blow-off needle-valve can be
suggested.
In case of outside installation, the unit should be protected against rain or splash
water, because malfunction may occur from a leakage if the connector’s screw is
improperly tightened (i.e. not appropriate sealing).
3.1 INSTALLATION INSTRUCTION
The measured medium – depending on its type and properties, might be hazardous
to the installer. Therefore, the wear of appropriate protective clothing, gloves, and
goggles are recommended.
Be careful because the membrane is very vulnerable!
Torque should only be transferred to the hexagonal screw on the instrument body
(torque wrench). The cylindrical housing of the transmitter must not be gripped
and tightened with a pipe wrench!
The plug-in electric connector can be unplugged after releasing and removing its
fastening screw. The connection insert can be pushed out by a screw driver from
the direction of the screw. The terminal block can be rotated with 90° within the
housing, so that the orientation of the cable gland could be changed to face
downwards. This is to prevent any leakages of the housing and subsequent
damages may occur. The power cable is to be connected with the relevant points of
the connector by guiding it through the cable gland (ISO 4400). Make sure if the
cable gland and the sealing plate of the connector tightened properly! Tighten the
screw of the connector so that the sealing plate underneath seals properly!
For the sake of noise suppression, the transmitter housing is grounded. If the
grounding of the process is correct no further grounding is needed, otherwise the
instrument should be grounded.
When installing the device, avoid high mechanical stresses on the pressure port!
This is particularly true for the pressure port made of plastic.
Installation steps:
Tightening torques:
¼" BSP: max. 5 Nm;
½" BSP: max. 10 Nm;
¼" NPT: max. 30 Nm;
The specified tightening torques must not be exceeded!
Mounting steps for BSP thread connections according to DIN 3852:
Do not use any additional sealing material such as Teflon tape! Check if the O-ring
is undamaged, it has a flawless and clean surface and seats in the designated
groove properly. Screw the device into the corresponding thread by hand, and
tighten the parts with a suitable torque wrench.
Mounting steps for NPT thread connections:
Use a suitable sealant (e.g. PTFE tape). Turn the device by hand to the correct
thread and tighten it with an open-end torque wrench.
If your device can be secured with a knurled ring, the pressure transmitter should
only be tightened by hand!
4. WIRING
Use a shielded and twisted multicore cable for the electrical connection. Electrically
connect the device according to the “Connection of ISO 4400 plug” figure. For
devices with cable gland, make sure that the external diameter of the cable used is
within the allowed clamping range! Once connected the wires, tighten the gland
screw firmly until the sealing is proper!
For the installation of a device with an integrated cable, the bending radiuses have
to comply with the following:
Cable without ventilation tube:
- static installation: 8-fold cable diameter,
- dynamic application: 12-fold cable diameter.
Cable with ventilation tube:
- static installation: 10-fold cable diameter,
- dynamic application: 20-fold cable diameter.
In case of devices with cable outlet and integrated ventilation tube, the PTFE filter
located at the cable end on the ventilation tube must not be damaged or missing!
2-wire current output
3-wire voltage output
Connection of integrated cable
Connection of iso 4400 plug
Connection of M12x1 / 4 pin plug

drc9122a0600h_01 - 3/3
4.1 E XAMPLES OF ARRANGEMENTS
Wiring of 2-wire pressure transmitters
Wiring of 3-wire pressure transmitters
Wiring of 2-wire Ex ia pressure transmitters
5. SPECIAL CONDITIONS OF SAFE USE
• Before turning on the device, make sure the installation is complete, with
no effects visible.
• The device may only be used within the limitations specified in the
technical specifications.
• The electrical connection of the device must be carried out in a way that the IP20
ingress protection is always ensured.
• Ex ia certified transmitters may only be operated in certified and approved
galvanically isolated intrinsically safe Ex ia circuits complying with the technical
data and the device’s explosion protection marking!
• The metal housing of the device must be connected to the EP (equipotential)
network!
• Attention! The devices may partially contain static charging capable plastic
components. The presence of electrostatic charges may cause a risk of spark
generation and ignition and therefore electrostatic charges must be completely
prevented!
Avoid friction on plastic surfaces!
Do not clean the device dry!
For example, use a wet duster.
6. TROUBLESHOOTING
Fault Possible causes Fault detection / remedy
No output signal:
Connected incorrectly. Check the connections!
Conductor/wire breakage. Check all wires with cable tester!
Defective measuring device
(signal input).
Check the amperemeter (and its
fuse) and the analogue input of
the signal processing unit!
Analog output signal
too low:
Load resistance too high. Check the value of the load
resistance!
Supply voltage too low. Check the power supply and
power /current on the
transducer/transmitter!
A slight shift of the
output signal:
The diaphragm of the
sensor is severely
contaminated.
Cleaning with non-aggressive
cleaning solutions, soft brush or
sponge.
The diaphragm of the
sensor is calcified or
crusted.
It is recommended to clean
carefully and remove dirt.
A large shift of the
output signal:
The diaphragm of the
sensor is damaged (caused
by overpressure or
mechanically).
Check the diaphragm of the
sensor, if it is damaged send the
device back to the manufacturer!
7. MAINTENANCE AND REPAIR
The instrument does not require regular maintenance. The repair should only be
carried out at NIVELCO's premises.
When disconnecting the device, it must always be done in depressurized and
disconnected state! Drain the medium before disconnecting the device. If necessary,
clean the diaphragm carefully with non-aggressive cleaning solution, soft paint-
brush or sponge. Improper cleaning may cause the irreparable damage of the
diaphragm. For this reason, never use sharp objects or pressurized air for cleaning
the diaphragm.
Before returning your device for repair, it has to be cleaned carefully,
neutralize/decontaminate the parts wet from the medium might contain harmful
substances.
Our official form (Returned Equipment Handling Form) must be enclosed after
downloaded from our homepage www.nivelco.com. You should dispatch the device
with a declaration of decontamination. In the declaration, you have to provide a
statement that the decontamination process is completed, and the device is clean
and free from harmful material and there is no hazardous substance on it.
8. STORAGE CONDITIONS
Storage temperature: -40 °C … +100 °C (-40 °F … +212 °F)
drc9122a0600h_01
July 2020.
NIVELCO reserves the right to change technical data without notice!