Process pressure measurement
Pressure switch for safe measurement and monitoring of
absolute and gauge pressure
Ceraphant PTC31B, PTP31B, PTP33B
Order code:
Ext. ord. cd.:
Ser. no.:
www.endress.com/deviceviewer
Endress+Hauser
Operations App
XXXXXXXXXXXX
XXXXX-XXXXXX
XXX.XXXX.XX
Serial number
1.
3.
2.
A0023555
• Make sure the document is stored in a safe place such that it is always available when
working on or with the device.
• To avoid danger to individuals or the facility, read the "Basic safety instructions" section
carefully, as well as all other safety instructions in the document that are specific to
working procedures.
• The manufacturer reserves the right to modify technical data without prior notice. Your
Endress+Hauser distributor will supply you with current information and updates to
these Instructions.
2Endress+Hauser
Ceraphant PTC31B, PTP31B, PTP33BTable of contents
Table of contents
1Document information .............. 5
1.1Document function ..................... 5
1.2Symbols used .......................... 5
1.3Documentation ........................ 6
1.4Terms and abbreviations ................. 7
1.5Turn down calculation ................... 8
2Basic safety instructions ............ 9
2.1Requirements concerning the staff .......... 9
2.2Designated use ........................ 9
2.3Workplace safety ...................... 10
2.4Operational safety ..................... 10
2.5Product safety ........................ 10
3Product description ................ 11
3.1Product design ........................ 11
3.2Function ............................ 11
4Incoming acceptance and product
identification ..................... 13
4.1Incoming acceptance ................... 13
4.2Product identification ................... 14
4.3Storage and transport .................. 15
5Installation ....................... 16
5.1Mounting dimensions .................. 16
5.2Installation conditions .................. 16
5.3Influence of the installation position ........ 16
5.4Mounting location ..................... 17
5.5Mounting instructions for oxygen
applications .......................... 19
5.6Post-installation check .................. 19
8Commissioning .................... 28
8.1Function check ....................... 28
8.2Enabling configuration/operation .......... 28
8.3Commissioning with an operating menu ..... 28
8.4Configuring pressure measurement (only for
devices with a current output) ............ 28
8.5Performing position adjustment ........... 30
8.6Configuring process monitoring ........... 33
8.7Functions of switch output ............... 33
8.8Current output ........................ 36
8.9Application examples ................... 38
8.10Configuring the local display ............. 38
8.11Protecting settings from unauthorized
access .............................. 39
9Diagnostics and troubleshooting ... 40
9.1Troubleshooting ...................... 40
9.2Diagnostic events ...................... 41
9.3Behavior of the device in the event of a
fault ............................... 43
9.4Response of output to errors .............. 43
9.5Behavior of the device in the event of a
voltage drop ......................... 44
9.6Behavior of the device in the event of an
incorrect entry ....................... 44
9.7Disposal ............................ 45
10Maintenance ...................... 45
10.1Exterior cleaning ...................... 45
11Repairs ........................... 46
11.1General notes ........................ 46
11.2Return .............................. 46
11.3Disposal ............................ 46
6Electrical connection .............. 20
6.1Connecting the measuring unit ............ 20
6.2Switching capacity ..................... 21
6.3Connection conditions .................. 22
6.4Connection data ....................... 22
6.5Post-connection check .................. 22
7Operation options ................. 23
7.1Operation with an operating menu ......... 23
7.2Structure of the operating menu ........... 23
7.3Operation with local display .............. 23
7.4General value adjustment and rejection of
illegal entries ......................... 24
7.5Navigation and selection from list ......... 24
7.6Locking and unlocking operation .......... 25
7.7Navigation examples ................... 27
7.8Status LEDs .......................... 27
7.9Resetting to factory settings (reset) ........ 27
Endress+Hauser3
12Overview of the operating menu .... 47
13Description of device parameters ... 49
13.1Switch output 1 and switch output 2 ........ 49
13.2Current output ........................ 53
13.3EF menu (extended functions) ............ 54
13.4DIAG menu (diagnosis) ................. 64
14Accessories ....................... 66
14.1Weld-in adapter ...................... 66
14.2Process adapter M24 ................... 66
14.3M12 plug connectors ................... 67
15Technical data .................... 68
15.1Input ............................... 68
15.2Output ............................. 71
Table of contentsCeraphant PTC31B, PTP31B, PTP33B
15.3Performance characteristics of ceramic
process isolating diaphragm .............. 74
15.4Performance characteristics of metal process
isolating diaphragm .................... 76
15.5Environment ......................... 78
15.6Process ............................. 80
Index .................................. 82
4Endress+Hauser
Ceraphant PTC31B, PTP31B, PTP33BDocument information
DANGER
WARNING
CAUTION
NOTICE
1 Document information
1.1 Document function
These Operating Instructions contain all the information that is required in various phases
of the life cycle of the device: from product identification, incoming acceptance and
storage, to mounting, connection, operation and commissioning through to
troubleshooting, maintenance and disposal.
1.2 Symbols used
1.2.1 Safety symbols
SymbolMeaning
DANGER!
This symbol alerts you to a dangerous situation. Failure to avoid this situation will result in
serious or fatal injury.
WARNING!
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
serious or fatal injury.
CAUTION!
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
minor or medium injury.
NOTICE!
This symbol contains information on procedures and other facts which do not result in
personal injury.
1.2.2 Electrical symbols
SymbolMeaningSymbolMeaning
Protective ground connection
A terminal which must be connected
to ground prior to establishing any
other connections.
Ground connection
A grounded terminal which, as far as
the operator is concerned, is
grounded via a grounding system.
1.2.3 Tool symbols
SymbolMeaning
Open-ended wrench
A0011222
1.2.4 Symbols for certain types of information
SymbolMeaning
Permitted
Procedures, processes or actions that are permitted.
Forbidden
Procedures, processes or actions that are forbidden.
The document types listed are available:
In the Download Area of the Endress+Hauser Internet site: www.endress.com →
Download
1.3.1 Technical Information (TI): planning aid for your device
PTC31B: TI01130P
PTP31B: TI01130P
PTP33B: TI01246P
The document contains all the technical data on the device and provides an overview of
the accessories and other products that can be ordered for the device.
1.3.2 Brief Operating Instructions (KA): getting the 1st measured
value quickly
KA01163P:
These instructions contain all the essential information from incoming acceptance to
initial commissioning.
6Endress+Hauser
Ceraphant PTC31B, PTP31B, PTP33BDocument information
URLOPLMWP
LRL
0
p
LRV
URV
1
2
3
4
1.4 Terms and abbreviations
A0029505
Item Term/
abbreviation
1OPLThe OPL (over pressure limit = sensor overload limit) for the measuring device
2MWPThe MWP (maximum working pressure) for the sensors depends on the lowest-
3Maximum sensor
measuring range
4Calibrated/adjusted
span
p-Pressure
-LRLLower range limit
-URLUpper range limit
-LRVLower range value
-URVUpper range value
-TD (turn down)Turn down
Explanation
depends on the lowest-rated element, with regard to pressure, of the selected
components, i.e. the process connection has to be taken into consideration in
addition to the measuring cell. Also observe pressure-temperature dependency. For
the relevant standards and additional notes, see the "Pressure specifications" section
→ 81 .
The OPL may only be applied for a limited period of time.
rated element, with regard to pressure, of the selected components, i.e. the process
connection has to be taken into consideration in addition to the measuring cell.
Also observe pressure-temperature dependency. For the relevant standards and
additional notes, see the "Pressure specifications" section → 81 .
The MWP may be applied at the device for an unlimited period.
The MWP can also be found on the nameplate.
Span between LRL and URL
This sensor measuring range is equivalent to the maximum calibratable/adjustable
span.
Span between LRV and URV
Factory setting: 0 to URL
Other calibrated spans can be ordered as customized spans.
The personnel for installation, commissioning, diagnostics and maintenance must fulfill
the following requirements:
Trained, qualified specialists: must have a relevant qualification for this specific
‣
function and task
Are authorized by the plant owner/operator
‣
Are familiar with federal/national regulations
‣
Before beginning work, the specialist staff must have read and understood the
‣
instructions in the Operating Instructions and supplementary documentation as well as
in the certificates (depending on the application)
Following instructions and basic conditions
‣
The operating personnel must fulfill the following requirements:
Being instructed and authorized according to the requirements of the task by the
‣
facility's owner-operator
Following the instructions in these Operating Instructions
‣
2.2 Designated use
2.2.1 Application and media
The Ceraphant is a pressure switch for measuring and monitoring absolute and gauge
pressure in industrial systems. The process-wetted materials of the measuring device must
have an adequate level of resistance to the media.
The measuring device may be used for the following measurements (process variables)
• in compliance with the limit values specified under "Technical data"
• in compliance with the conditions that are listed in this manual.
Measured process variable
Gauge pressure or absolute pressure
Calculated process variable
Pressure
2.2.2 Incorrect use
The manufacturer is not liable for damage caused by improper or non-designated use.
Verification for borderline cases:
For special fluids and fluids for cleaning, Endress+Hauser is glad to provide assistance
‣
in verifying the corrosion resistance of process-wetted materials, but does not accept
any warranty or liability.
2.2.3 Residual risks
When in operation, the housing may reach a temperature close to the process
temperature.
Danger of burns from contact with surfaces!
For elevated process temperatures, ensure protection against contact to prevent burns.
Wear the required personal protective equipment according to federal/national
‣
regulations.
Switch off the supply voltage before connecting the device.
‣
2.4 Operational safety
Risk of injury!
Operate the device in proper technical condition and fail-safe condition only.
‣
The operator is responsible for interference-free operation of the device.
‣
Conversions to the device
Unauthorized modifications to the device are not permitted and can lead to unforeseeable
dangers.
If, despite this, modifications are required, consult with Endress+Hauser.
‣
Hazardous area
To eliminate the risk of danger to persons or the facility when the device is used in the
approval-related area (e.g. pressure equipment safety):
Check the nameplate to verify if the device ordered can be put to its intended use in the
‣
approval-related area.
2.5 Product safety
This measuring device is designed in accordance with good engineering practice to meet
state-of-the-art safety requirements, has been tested, and left the factory in a condition in
which it is safe to operate.
It meets general safety standards and legal requirements. It also complies with the EU
directives listed in the device-specific EU Declaration of Conformity. Endress+Hauser
confirms this by affixing the CE mark to the device.
Devices with ceramic process isolating diaphragm (Ceraphire®)
The ceramic sensor is an oil-free sensor, i.e. the process pressure acts directly on the
robust ceramic process isolating diaphragm and causes it to deflect. A pressure-dependent
change in capacitance is measured at the electrodes of the ceramic substrate and the
process isolating diaphragm. The measuring range is determined by the thickness of the
ceramic process isolating diaphragm.
Devices with metallic process isolating diaphragm
The process pressure deflects the metal process isolating diaphragm of the sensor and a fill
fluid transfers the pressure to a Wheatstone bridge (semiconductor technology). The
pressure-dependent change in the bridge output voltage is measured and evaluated.
12Endress+Hauser
Ceraphant PTC31B, PTP31B, PTP33BIncoming acceptance and product identification
DELIVERY NOTE
1 = 2
E
E
DELIVERYNOTE
E
4 Incoming acceptance and product
identification
4.1 Incoming acceptance
A0028673
A0016870
Is the order code on the delivery note (1) identical to the order code on
the product sticker (2)?
A0028673
A0028673
A0022099
A0022101
Are the goods undamaged?
A0022104
Do the data on the nameplate correspond to the order specifications and
the delivery note?
Endress+Hauser13
Incoming acceptance and product identificationCeraphant PTC31B, PTP31B, PTP33B
Ser. no.:
Ord. cd.:
Ext. ord. cd.:
D-79689 Maulburg
Made in Germany,
Ceraphant
5
1
2
3
4
Date:
TAG:
A0028673
A0022106
Is the documentation available?
If required (see nameplate): Are the safety instructions (XA) provided?
If one of these conditions does not apply, please contact your
Endress+Hauser sales office.
4.2 Product identification
The following options are available for the identification of the measuring device:
• Nameplate specifications
• Order code with a breakdown of the device features on the delivery note
• Enter the serial numbers from the nameplates in W@M Device Viewer
(www.endress.com/deviceviewer): All the information about the measuring device is
displayed.
For an overview of the technical documentation provided, enter the serial number from
the nameplates in W@M Device Viewer (www.endress.com/deviceviewer)
4.2.1 Manufacturer address
Endress+Hauser SE+Co. KG
Hauptstraße 1
79689 Maulburg, Germany
Address of the manufacturing plant: See nameplate.
4.2.2 Nameplate
1Manufacturer's address
2Device name
3Order number
4Serial number
5Extended order number
A0030101
14Endress+Hauser
Ceraphant PTC31B, PTP31B, PTP33BIncoming acceptance and product identification
4.3 Storage and transport
4.3.1 Storage conditions
Use original packaging.
Store the measuring device in clean and dry conditions and protect from damage caused by
shocks (EN 837-2).
Storage temperature range
–40 to +85 °C (–40 to +185 °F)
4.3.2 Transporting the product to the measuring point
WARNING
L
Incorrect transport!
Housing and diaphragm may become damaged, and there is a risk of injury!
Transport the measuring device to the measuring point in its original packaging or by
‣
the process connection.
Endress+Hauser15
InstallationCeraphant PTC31B, PTP31B, PTP33B
1
1
1
1
C
A
B
5 Installation
5.1 Mounting dimensions
For dimensions, see the "Mechanical construction" section in the Technical Information.
5.2 Installation conditions
• Moisture must not penetrate the housing when mounting the device, establishing the
electrical connection and during operation.
• Do not clean or touch process isolating diaphragms with hard and/or pointed objects.
• Do not remove process isolating diaphragm protection until shortly before installation.
• Always tighten the cable entry firmly.
• Point the cable and connector downwards where possible to prevent moisture from
entering (e.g. rain or condensation water).
• Protect housing against impact.
• For devices with gauge pressure sensor and M12 or valve plug, the following applies:
NOTICE
If a heated device is cooled in the course of a cleaning process (by cold water, for
example), a vacuum develops for a short time causing moisture to penetrate the
sensor via the pressure compensation element (1).
Device could be destroyed!
In the event of this happening, mount the device in such a way that the pressure
‣
compensation element (1) is pointing downwards at an angle or to the side, if possible.
A0022252
5.3 Influence of the installation position
Any orientation is possible. However, the orientation may cause a zero point shift i.e. the
measured value does not show zero when the vessel is empty or partially full.
A0024708
16Endress+Hauser
Ceraphant PTC31B, PTP31B, PTP33BInstallation
1
2
TypeProcess isolating
diaphragm axis is
horizontal (A)
PTP31B
PTP33B
PTC31B
< 1 bar (15 psi)
PTC31B
≥1 bar (15 psi)
Calibration position, no
effect
Calibration position, no
effect
Calibration position, no
effect
Process isolating diaphragm
pointing upwards (B)
Up to +4 mbar (+0.058 psi)Up to –4 mbar (–0.058 psi)
Up to
+0.3 mbar (+0.0044 psi)
Up to +3 mbar (+0.0435 psi)Up to –3 mbar (–0.0435 psi)
Process isolating diaphragm
pointing downwards (C)
Up to
–0.3 mbar (–0.0044 psi)
A position-dependent zero shift can be corrected on the device .
5.4 Mounting location
5.4.1 Pressure measurement
Pressure measurement in gases
Mount the device with shutoff device above the tapping point so that any condensate can
flow into the process.
A0025920
1Device
2Shutoff device
Pressure measurement in vapors
For pressure measurement in vapors, use a siphon. The siphon reduces the temperature to
almost ambient temperature. Preferably mount the device with the shutoff device and
siphon below the tapping point.
Advantage:
• defined water column causes only minor/negligible measuring errors and
• only minor/negligible heat effects on the device.
Mounting above the tapping point is also permitted.
Note the max. permitted ambient temperature of the transmitter!
Take the influence of the hydrostatic water column into consideration.
Endress+Hauser17
InstallationCeraphant PTC31B, PTP31B, PTP33B
1
1
2
2
3
4
1
2
3
A0025921
1Device
2Shutoff device
3Siphon
4Siphon
Pressure measurement in liquids
Mount the device with a shutoff device and siphon below or at the same height as the
tapping point.
Advantage:
• defined water column causes only minor/negligible measuring errors and
• air bubbles can be released to the process.
Take the influence of the hydrostatic water column into consideration.
A0025922
1Device
2Shutoff device
3Siphon
5.4.2 Level measurement
• Always install the device below the lowest measuring point.
• Do not install the device at the following positions:
– In the filling curtain
– In the tank outlet
– in the suction area of a pump
– Or at a point in the tank which could be affected by pressure pulses from the agitator.
18Endress+Hauser
• A functional test can be carried out more easily if you mount the device downstream
from a shutoff device.
Ceraphant PTC31B, PTP31B, PTP33BInstallation
A0025923
5.5 Mounting instructions for oxygen applications
Oxygen and other gases can react explosively to oils, grease and plastics, such that, among
other things, the following precautions must be taken:
• All components of the system, such as measuring devices, must be cleaned in accordance
with the BAM requirements.
• Dependent on the materials used, a certain maximum temperature and a maximum
pressure for oxygen applications must not be exceeded.
• The following table lists devices (devices only, not accessories or enclosed accessories),
which are suitable for gaseous oxygen applications.
Devicep
PTC31B40 bar (600 psi)–10 to +60 °C (+14 to +140 °F)HB
1)Product Configurator, order code for "Service"
for oxygen applicationsT
max
for oxygen applicationsOption
max
5.6 Post-installation check
Is the device undamaged (visual inspection)?
Does the device comply with the measuring point specifications?
For example:
• Process temperature
• Process pressure
• Ambient temperature range
• Measuring range
Are the measuring point identification and labeling correct (visual inspection)?
Is the device adequately protected against precipitation and direct sunlight?
Are the securing screws tightened securely?
Is the pressure compensation element pointing downwards at an angle or to the side?
To prevent moisture from penetrating, ensure that the connecting cables/plugs are pointing downwards.
Risk of injury from the uncontrolled activation of processes!
Switch off the supply voltage before connecting the device.
‣
Make sure that downstream processes are not started unintentionally.
‣
WARNING
L
Limitation of electrical safety due to incorrect connection!
In accordance with IEC/EN61010 a separate circuit breaker must be provided for the
‣
device .
The device must be operated with a 630 mA fine-wire fuse (slow-blow).
‣
Protective circuits against reverse polarity are integrated.
‣
NOTICE
Damage to analog input of PLC resulting from incorrect connection
Do not connect the active PNP switch output of the device to the 4 to 20 mA input of a
‣
PLC.
Connect the device in the following order:
1.Check that the supply voltage corresponds to the supply voltage indicated on the
nameplate.
2.Connect the device in accordance with the following diagram.
Switch on the supply voltage.
For devices with a cable connection: do not close reference air hose (see (a) in the
following drawings)! Protect reference air hose against penetration by water/condensate.
1 x PNP switch output R1
M12 plugValve plugCable
A0029268
A0023271
A0022801
1brown = L+
2ablack = switch output 1
2b white = not in use
3blue = L4green/yellow = ground
(a) reference air hose
1brown = L+
2a black = switch output 1
2b white = switch output 2
3blue = L4green/yellow = ground
(a) reference air hose
1 x PNP switch output R1 with additional analog output 4 to 20 mA (active)
M12 plugValve plugCable
-
A0023249
1brown = L+
2a black = switch output 1
2b white = analog output 4 to 20 mA
3blue = L4green/yellow = ground
(a) reference air hose
6.1.2 Supply voltage
Supply voltage: 10 to 30 V DC
6.1.3 Current consumption and alarm signal
Intrinsic power consumptionAlarm current (for device with analog output)
≤ 60 mA≥21 mA (factory setting)
6.2 Switching capacity
• Switch state ON: Ia ≤ 250 mA; switch state OFF: Ia ≤1 mA
• Switch cycles: >10,000,000
• Voltage drop PNP: ≤2 V
• Overload protection: Automatic load testing of switching current;
– Max. capacitive load: 14 μF at max. supply voltage (without resistive load)
– Max. cycle duration: 0.5 s; min. ton: 4 ms
– Periodic disconnection from protective circuit in the event of overcurrent (f = 2 Hz) and
For valve plug: < 1.5 mm2 (16 AWG) and Ø4.5 to 10 mm (0.18 to 0.39 in)
6.4 Connection data
6.4.1 Load (for devices with analog output)
The maximum load resistance depends on the terminal voltage and is calculated according
to the following formula:
1Power supply 10 to 30 V DC
2R
UBSupply voltage
maximum load resistance
Lmax
If load is too great:
• Failure current is output and "S803" displayed (output: MIN alarm current)
• Periodic checking to establish if it is possible to quit fault state
6.5 Post-connection check
Is the device or cable undamaged (visual check)?
Do the cables comply with the requirements?
Do the mounted cables have adequate strain relief?
Are all the cable glands installed, firmly tightened and leak-tight?
Does the supply voltage match the specifications on the nameplate?
Is the terminal assignment correct ?
If required: has protective ground connection been established?
If supply voltage is present, is the device ready for operation and do values appear on the display module or
is the green LED lit on the electronic insert?
A0031107
22Endress+Hauser
Ceraphant PTC31B, PTP31B, PTP33BOperation options
7 Operation options
7.1 Operation with an operating menu
7.1.1 Operating concept
Operation with an operating menu is based on an operation concept with "user roles" .
User roleMeaning
Operator
(display level)
Maintenance
(user level)
Operators are responsible for the devices during normal "operation". This is usually limited to
reading process values either directly at the device or in a control room. Should an error occur,
these users simply forward the information on the errors but do not intervene themselves.
Service engineers usually work with the devices in the phases following device commissioning.
They are primarily involved in maintenance and troubleshooting activities for which simple
settings have to be made on the device. Technicians work with the devices over the entire life
cycle of the product. Thus, commissioning and advanced settings and configurations are some
of the tasks they have to carry out.
7.2 Structure of the operating menu
The menu structure has been implemented according to VDMA 24574-1 and
complemented by Endress+Hauser-specific menu items.
User roleSubmenuMeaning/use
Operator (display
level)
Maintenance (user
level)
For an overview of the entire operating menu, see the → 47
Display/operat.Display of measured values, fault and information messages
DIAGContains all the parameters that are needed to detect and analyze
Contains all the parameters that are needed to commission
measuring operations. A wide range of parameters, which can be
used to configure a typical application, is available at the start. After
making settings for all these parameters, the measuring operation
should be completely configured in the majority of cases.
parameters which allow more accurate configuration of the
measurement, conversion of the measured value and scaling of the
output signal.
operating errors.
7.3 Operation with local display
7.3.1 Overview
A 1-line liquid crystal display (LCD) is used for display and operation. The local display
shows measured values, fault messages and information messages and therefore supports
the user through each operating step.
The display is fixed to the housing and can be electronically rotated 180° (see parameter
description for "DRO" → 62). This ensures optimum readability of the local display and
allows the device to be mounted upside down also.
During measuring operation, the display shows measured values, fault messages and
notice messages. In addition, it is possible to switch to menu mode via the operating keys.
Endress+Hauser23
Operation optionsCeraphant PTC31B, PTP31B, PTP33B
2
E
54
3
1
A0022121
1Operating keys
2Status LED
3Switch output LEDs
4Measured value
5Unit
The second switch output is not used for the device version with current output.
7.4 General value adjustment and rejection of illegal
entries
Parameter (not numerical value) is flashing: parameter can be adjusted or selected.
When adjusting a numerical value: the numerical value does not flash. The first digit of the
numerical value starts to flash only when the key is pressed by way of confirmation.
Enter the desired value with the or key and press the key to confirm. Following
confirmation, the data are recorded directly and are active.
– Entry is OK: value is accepted and shown for one second on the display against a white
background.
– Entry is not OK: the message "FAIL" appears for one second on the display against a red
background. The value entered is rejected. In the event of an incorrect setting which
affects the TD, an diagnostic message is displayed.
7.5 Navigation and selection from list
The capacitive operating keys are used for navigation in the operating menu and to select
an option from a picklist.
Operating key(s)Meaning
• Navigate downwards in the picklist
A0017879
A0017880
A0017881
SimultaneouslyESC functions:
and
A0017879
• Edit the numerical values or characters within a function
• Navigate upwards in the picklist
• Edit the numerical values or characters within a function
• Confirm entry
• Jump to the next item
• Select a menu item and activate the edit mode
• The key lock function (KYL) is accessed by pressing the key for longer than 2 seconds
• Exit edit mode for a parameter without saving the changed value.
• You are in a menu at a selection level. Each time you press the keys simultaneously, you
A0017880
go up a level in the menu.
• Long ESC: press the keys for longer than 2 seconds
24Endress+Hauser
Ceraphant PTC31B, PTP31B, PTP33BOperation options
7.6 Locking and unlocking operation
The device features
• Automatic key locking
• Parameter settings lock.
Key locking is indicated on the local display by "E > 2".
Locking of the parameter settings is indicated as soon as an attempt is made to change a
parameter.
7.6.1 Disabling the key lock
The keys are locked automatically if the device remains at the topmost menu level (display
of pressure measurement value) for 60 seconds.
Call up the key lock function (KYL)
1.Press the key for at least 2 seconds and then release it
2.By confirming with "ON" is displayed
3.Use and to toggle between "ON" and "OFF"
4.Key locking is disabled as soon as is pressed to confirm "OFF"
The display changes to the main value level (topmost menu level) if the key is pressed
briefly. The display changes to the key locking if the key is pressed for at least 2
seconds.
If in the case of "KYL", "ON" or "OFF", more than 10 seconds elapse without a key being
pressed, you return to the topmost menu level with active key locking.
The function can be accessed anytime outside the main measured value display and within
the operating menu, i.e. if the key is pressed for at least 2 seconds key locking can be
performed anytime at any menu item. Locking is effective immediately. If you quit the
context menu, you will return to the same point from which key locking was selected.
7.6.2 Locking parameter settings
COD locking code
NavigationEF → ADM → COD
DescriptionA code can be entered to protect parameter settings against unauthorized and unwanted
access.
Selection
Factory setting0000
To lock: Enter a number ¹ the LCK release code (value range: 1 to 9999).
7.6.3 Unlocking parameter settings
If parameters are locked, the word "LCK" appears on the local display as soon as an attempt
is made to change a parameter.
LCK unlocking code
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Operation optionsCeraphant PTC31B, PTP31B, PTP33B
NavigationEF → ADM → LCK
DescriptionUse this function to enter the code (which was defined in the COD parameter) to enable
configuration.
Keys are evaluated but parameters are read only. The parameters can only be changed
after unlocking.
If an attempt is made to write to a parameter, a prompt for the device access code appears.
To unlock, enter the user-defined device access code (which was specified in the COD
parameter).
User entryTo unlock: Enter the access code.
Factory setting0000
NoteThe access code is "0000" in the order configuration. Another access code can be defined in
the parameter "COD".
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