NoShok 755 Operating Manual
b
NOSHOK Series 755 / 756
Digital Pressure Transmitter
Operating Manual
Contents
1 General Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 Product Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2.1 Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2.1.1 Pressure Transducer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2.1.2 Control Interface Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2.1.3 Display Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.2 Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2.1 Functions of Devices without Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2.2 Functions of Devices with Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.3 Installation Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1 Input-values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2 Output-values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.3 Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4 Auxilliary Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.5 Ambient Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.6 Process Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1 Pressure Transmitter Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2 Display Unit Upgrades. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.3 Housing Reconfiguration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.4 Electrical Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.5 Pressure Compensation when using a Relative Pressure Sensor . . . . . . . . . . . . 12
5 Operation of Devices without Displays . . . . . . . . . . . . . . . . . . . . . . . 13
5.1 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.2 Key Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.3 Calibration with Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.3.1 Zero Point Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.3.2 Span Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.4 Calibration without Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.4.1 Zero Point Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.4.2 Span Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.5 Integration Time (Dampening) Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.6 Reset to Default. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6 Operation of Devices with Displays. . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.1 The Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.2 Key Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.3 The Programming Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.4 Default Data (factory setting) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.5 Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.5.1 Main Menu: Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.5.2 Main Menu: Calibration of zero and span (with / without pressure) . . . . . . . . . . . 24
6.5.3 Main Menu: Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.5.4 Main Menu: Evaluation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.5.5 Main Menu: Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.5.6 Main Menu: Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7 Diagnostics and Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
9 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
9.1 Dimension Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
9.2 Warranty Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
9.3 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
9.4 Units of Pressure Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
1 General Safety Instructions
Observe the national safety and accident prevention regulations, as well as
the following safety instructions in this operating manual when working with
the hydrostatic pressure transducer.
Any operation not described in the following instructions should not be
used.
If a fault cannot be corrected, the device should be removed from operation
and disposed of to prevent it’s reinstallation.
Repairs should only be performed by the manufacturer. All other repairs or
device modifications are unauthorized.
Other important safety guidelines are located in the individual sections of
this instruction manual.
2 Product Description
The pressure transmitter can be used in level control as well as pressure measurement in process applications. A variety of process connections, measurement ranges,
electronic interfaces and display options offer a product for a wide range of applications.
2.1 Construction
The Digitrans consists of a pressure sensor, a control interface unit and a housing
cover with optional display. Different modular configurations are available allowing a
variety of designs.
Direct Mounted
2.1.1 Pressure
The pressure transducer has a piezo-resistive or thinfilm measurement cell depending on the pressure range. The sensors are temperature compensated, and have a
fully welded membrane which is "helium" leak-tested. Pressur e transducers do not
have internal seals.
Pressure transducers further distinguish themselves from one another based on their
ranges and the types of media-touching materials. Different versions of process connec
2.1.2 Control Interface Unit
The control interface unit contains the terminal compartment and the keypad used in
programming the device. The four keys must be active (unlocked) before use. The
keypad is locked during normal operation to protect data and functions previously entered. The keypad automatically locks after 10 minutes of disuse. The control interface converts the sensor’s digital signal into
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Transducer
tions can be selected for a wide range of application conditions.
a standard 4-20 mA current signal.
2.1.3 Display Unit
CALIBRATION
RANGE
The measured-value indicator has four digits (in a 7-segment display) + symbols. Below it, is line 1 (16-segment display) used to display error codes and the signal’s unit
of measure. The unit of measure can be selected by the operator.
Additional information is displayed in lines 2 and 3 (16-segment display). The operator
can enter commands in the programming mode on the display unit by means of menu
driven, clear
-text prompts.
Devices with displays clearly offer a higher number of programming and control interface options. These options include alarm status, dampening, signal inversion, tank
linearization and diagnostic messages.
Display units can be easily upgraded (see Section 4.2).
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2.2 Function
The mode of operation for signal conversion is the same for all versions. The pressure
transducer converts the existing pressure into an electrical signal. Microelectronics
further process the input signal and produce a proportional 4-20 mA standard signal.
The display-version allows programming (parameterization) and the display of expanded functions such as inversion, dampening, alarm status and linearization.
2.2.1 Functi
ons of Devices without Displays
• Calibration of zero and span with pressure (see 5.3)
• Calibration of zero and span without pressure (dry adjustment) (see 5.4)
• Setting the dampening / integrating the output signal 0-40 s (see 5.5)
• Reset to manufacturer’s default values (see 5.6)
2.2.2 Functions of Devices with Displays
• Optional units of measure for measured-values (mbar, bar, psi, mA, %, m, mm WS)
(see 6.5.1)
• Temperature and Min/Max values shown in
display (see 6.5.1)
• Nominal pressure range of the sensor shown in display (see 6.5.1)
• Zero and span calibration (with/without pressure) (see 6.5.2)
• Dampening setting / integration of output signal 0-40 s (see 6.5.3)
• Inversion of the output current signal (see 6.5.3)
• Alarm output current value setting (3.6 mA or 21 mA) (see 6.5.3)
• Setting the limits of the output signal (see 6.5.3)
• Offset of the output signal (see 6.5.3)
• Mounting correction of the senso
r
• Measuring circuit test function (see 6.5.4)
• Reset functions (see 6.5.4)
• Password activation (see 6.5.4)
• Selecting the language of the display (see 6.5.5)
• Entry of a table function for the linearization of the output signal (see 6.5.6)
• Entry of medium consistency (see 6.5.6)
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2.3 Installation Examples
The Digitrans is primarily used to detect the pressure in pipes, plants and tanks.
The pressure is measured using absolute (against a vacuum) or relative (against
external or air pressure) measurement depending on the type of sensor selected.
The Digitrans is also used for hydrostatic pressure measurement of liquids in tanks.
Process Pressure Measurement: Process Pressure Measurement:
Used to measure pressure of liquids Used to measure container press
or gases in pipelines.
ure.
Process Pressure Measurement: Process Pressure Measurement:
Installed behind feed pumps for Installed in front of and behind the filter.
process control or monitoring pump Uses the pressure differential for moni-
in the filter. Both output signals are pr o-
cessed by a PLC or signal converter.
Page 4
trid fo noitalumucca ro noitcnuf eht gnirot.snoitcnuf
007-DS-D 008-DS-D
:lortnoC leveL:lortnoC leveL
(with front flush diaphragm) are measured by two externally mounted
pressure transducers. The two signals
are anylized and the differential is cal-
culated by a PLC or suitable signal con-
verter.
erusserp daeh dna erusserp denibmoC detnuom yllanretxE
Page 5
3 Technical Data
3.1 Input-values
Pressure Range
(Absolute pressure upon request)
3.2 Output-values
Output signal 4 ... 20 mA
Characteristic deviation [% of span]
(linearity, hysteresis, repeatability)
Turn down behavior:
up to 1 : 5
1 : 5 to 1 : 20
Total error (between 50 ... 104°F) better than 0,15 % of full scale
Load RA < (UB–12 V)/23 mA (RA in Ohms & UB in volts)
0 - 5 psi 30 psi
overload limit
0 - 25 psi 150 psi
0 - 100 psi 500 psi
0 - 250 psi 1200 psi
0 - 500 psi 1200 psi
0 - 1500 psi 3000 psi
0 - 3000 psi 7500 psi
0 - 7500 psi 18000 psi
0 - 15000 psi 22000 psi
0.10 at ranges of > 600 psi
<
0.15 at ranges of > 600 psi
<
no characteristic deviation
characteristic deviation * (turn down / 5)
for ranges > 600 psi
better than 0,20 % of full scale
for ranges < 600 psi
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elbammargorp ,Am12 ro Am 6.3langis tluaF
Integration time 0 s, 1 s, 5 s, 20 s, 40 s, programmable
Adjustment of the span 1 : 20
Integrated lightning protection optional
Zero point adjustment 2.5 ... 99 %
3.3 Construction
Process connections
Series 755
1/2” NPT Male
Series 756
Materials
Housings
Series 755
Series 756
Internal transmission fluid
Electrical connection and protection
method per EN 60 529/ IEC529
Electronic protection methods Reverse polarity, overload and short cir-
3.4 Auxilliary Power
Power supply 12 ... 36 V DC
3.5 Ambient Conditions
Front Flush
R
G1B Ranges: 0 psi to 25 psi
G 1/2 B Ranges: 100 psi to 7500 psi
Durable, fiberglass plastic (PBT)
CrNi-steel 1.4571 and 1.4542
CrNi-steel 1.4571 and O-Ring: NBR
{Viton or EPDM}; {Hastelloy C4}
Standard {Halocarbon oil for oxygenbased designs}; {FDA-approved}
M 20 x 1.5 cable gland with internal terminal block (see 4.4)
cuit protection
Ambient temperature – 4 °F ... 158 °F
(– 20 °C ... 70 °C)
Storage temperature – 31 °F ... 176 °F
(– 35 °C ... 80 °C)
Climate class D per DIN IEC 654-1
Environmental protection IP 65 (IP 67 upon request)
EMC per EN 61326,
NAMUR NE 21
Page 7
3.6 Process Conditions
Medium temperatures – 22 °F ... 212 °F ( – 30 °C ... 100 °C)
Max. wash-down temperatures 248 °F (120 °C)
The device should not be subjected to the wash-down temperature for
more than 10 minutes at a time!
Attention
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