WIKA CPT6020 User manual

Operating instructions
Precision Pressure Transducer
Basic Version, Model CPT6020 EN
Precision Pressure Transducer, Model CPT6020

2Mensor operating instructions process pressure transducer, Model CPT6020
0020507001B 09/2019 EN
EN Operating instructions model CPT6020
© 12/2017, Mensor, LP. All rights reserved.
Mensor is a registered trademark of Mensor, LP.
All other brand and product names are trademarks or registered trademarks of their respective companies.
Prior to starting any work, read the operating instructions!
Keep for later use!

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Contents
1. General Information 6
1.1 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2 Radio Frequency Emission Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2.1 FCC Emission Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2.2 CE Emission Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3 Software License Agreement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4 Mensor Service Plus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4.1 After the Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4.2 Calibration Services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4.3 Certifications and Accreditations . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2. Short Overview 8
2.1 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Scope of Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3. Safety 9
3.1 Explanation of Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.3 Improper Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
3.4 Responsibility of the Operator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.5 Personnel Qualification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.6 Personal Protective Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.7 Labeling, Safety Marks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.7.1 Product Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.7.2 Symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.8 Warnings and Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4. Transport, Packaging and Storage 13
4.1 Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 Packaging and storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5. Installation 14
5.1 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.1.1 Pressure Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.1.2 Safety Relief Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.1.3 Pressure Media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.1.4 Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6. Operation 16
6.1 General Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.1.1 Command and Query Format . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.1.1.1 RS-485 Command and Query Format . . . . . . . . . . . . . . . . . . . . . . 16
6.1.1.2 RS-232 Command and Query Format . . . . . . . . . . . . . . . . . . . . . . 16
6.1.1.3 Command Error Detection and Debugging . . . . . . . . . . . . . . . . . . . . 16
6.1.2 CPT6020 Commands and Queries. . . . . . . . . . . . . . . . . . . . . . . . . 17
6.1.2.1 Default Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.1.2.2 Setting the Command Set . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.1.2.3 Setting Pressure Units . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.1.2.4 Customer Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.1.2.5 Calibration Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.1.2.6 Output String Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.1.3 MENSOR Legacy Command Set . . . . . . . . . . . . . . . . . . . . . . . . . 22
7. Maintenance and Recalibration 24

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7.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.1.1 Beyond the Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.2 Recalibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.2.1 Calibration Services by Mensor or WIKA worldwide . . . . . . . . . . . . . . . . . . . 24
7.2.2 Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.2.3 Pressure Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.2.4 Media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.2.5 Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.2.6 Calibration & Communication Software . . . . . . . . . . . . . . . . . . . . . . . 26
8. Dismounting, Return and Disposal 28
8.1 Dismounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.2 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8.3 Disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
9. Specifications 30
9.1 Measurement Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
9.2 General Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
9.3 Approvals and Certificates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
9.4 Dimensions in mm (in) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
10. Accessories 33
10.1 Fittings & Gaskets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
10.2 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Contents

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6WIKA operating instructions process pressure transducer, model CPT6020
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1. General Information
■The CPT6020 Precision Pressure Transducer described in the operating instructions has been designed and manufactured
using state-of-the-art technology. All components are subject to stringent quality and environmental criteria during production.
Our management systems are certified to ISO 9001 and ISO 14001.
■These operating instructions contain important information on handling the instrument. Working safely requires that all safety
instructions and work instructions are observed.
■Observe the relevant local accident prevention regulations and general safety regulations for the instrument's operating range.
■The operating instructions are part of the instrument and must be kept in the immediate vicinity of the instrument and readily
accessible to skilled personnel at any time. Pass the operating instructions onto the next operator or owner of the instrument.
■Skilled personnel must have carefully read and understood the operating instructions prior to beginning any work.
■The general terms and conditions contained in the sales documentation shall apply.
■Subject to technical modifications.
■Factory calibrations are carried out in accordance with international standards.
■Further information:
Mensor Corporation
- Address 201 Barnes Dr., San Marcos, TX 68666
- Internet address: www.mensor.com
- Relevant data sheet: CT 25.12
- Application consultant: Tel.: [phone]
([phone] (USA only)
Fax: [phone]
E-Mail: [e-mail]
[email protected]
Importer for Europe
WIKA Alexander Wiengand SE & Co. KG
-Address Alexander Wiegand-Straße
63911 Klingenberg, Germany
- Internet address: www.wika.de / www.wika.com
- Relevant data sheet: CT 25.12
- Application consultant: Tel.: [phone]
Fax: [phone]
E-Mail: CT[email protected]
1.1 Warranty
All products manufactured by Mensor are warranted to be free of defects in workmanship and materials for a period of two year
from the date of shipment. No other express warranty is given, and no affirmation of Seller, by words or actions, shall constitute
a warranty. SELLER DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR
PURPOSES WHATSOEVER. If any defect in workmanship or material should develop under conditions of normal use and service
within the warranty period, repairs will be made at no charge to the original purchaser, upon delivery of the product(s) to the
factory, shipping charges prepaid. If inspection by Mensor or its authorized representative reveals that the product was damaged
General information

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by accident, alteration, misuse, abuse, faulty installation or other causes beyond the control of Mensor, this warranty does not
apply. The judgment of Mensor will be final as to all matters concerning condition of the product, the cause and nature of a defect,
and the necessity or manner of repair. Service, repairs or disassembly of the product in any manner, performed without specific
factory permission, voids this warranty.
MENSOR MAKES NO WARRANTY OF ANY KIND WITH REGARD TO THIS MANUAL, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Mensor shall not be liable for
errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this
material.
1.2 Radio Frequency Emission Notices
USE SHIELDED CABLES TO CONNECT EXTERNAL DEVICES TO THIS INSTRUMENT TO
MINIMIZE RF RADIATION
1.2.1 FCC Emission Notice
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC
Rules.These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in
a residential environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio communications.
1.2.2 CE Emission Notice
This equipment is of the emission class B, intended for operation in industrial, residential or commercial environments.
1.3 Software License Agreement
This product contains intellectual property, i.e. software programs, that are licensed for use by the end user/customer (hereinafter
“end user”).
This is not a sale of such intellectual property.
The end user shall not copy, disassemble or reverse compile the software program.
The software programs are provided to the end user “as is” without warranty of any kind, either express
or implied, including, but not limited to, warranties of merchantability and fitness for a particular purpose.
The entire risk of the quality and performance of the software program is with the end user.
Mensor and its suppliers shall not be held to any liability for any damages suffered or incurred by the end user (including, but
not limited to, general, special, consequential or incidental damages including damages for loss of business profits, business
interruption, loss of business information and the like), arising from or in connection with the delivery, use or performance of the
software program.
1.4 Mensor Service Plus
1.4.1 After the Warranty
Mensor’s concern with the performance of this instrument is not limited to the warranty period. We provide complete repair,
calibration and certification services after the warranty for a nominal fee.
1.4.2 Calibration Services
In addition to servicing our own products Mensor can perform a complete pressure calibration service, up to 30,000 psi, for all of
your pressure instruments.This service includes an accredited calibration.
1.4.3 Certifications and Accreditations
Mensor is registered to ISO 9001:2008.The calibration program at Mensor is accredited by A2LA, as complying with both the ISO/
IEC 17025:2005 and the ANSI/NCSL Z540-1-1994 standards.
General Information

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Short Overview
2. Short Overview
The CPT6020 pressure transducer is a high accuracy digital output pressure transducer and is available in gauge, absolute and
bidirectional pressure ranges with full scale pressure ranges as low as 10” H2O to as high as 15,015 psia .
Figure 2.1
2.1 Features
Here is a short list of significant features designed into the CPT6020:
■Accuracy to 0.02% FS
■Wide voltage power input range
■IP-67 rating for harsh environments
■All 316L SS wetted path on ranges >5 psi
■Command emulation for digital communications
■User selectable units
■Compact size
2.2 Scope of Delivery
■Precision Pressure Transducer model CPT6020
■Power cord with 1.5 m (5 ft) length
■Operating instruction
■Factory calibration certificate
■Selected fitting

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Safety
3. Safety
3.1 Explanation of Symbols
DANGER!
... indicates a directly dangerous situation resulting in serious injury or death, if not avoided.
WARNING!
... indicates a potentially dangerous situation that can result in serious injury or death, if not avoided.
CAUTION!
... indicates a potentially dangerous situation that can result in light injuries or damage to property or the environment,
if not avoided.
DANGER!
... identifies hazards caused by electrical power. Should the safety instructions not be observed, there is a risk of
serious or fatal injury.
WARNING!
... indicates a potentially dangerous situation that can result in burns, caused by hot surfaces or liquids, if not avoided.
Information
... points out useful tips, recommendations and information for efficient and trouble-free operation.
3.2 Intended Use
The CPT6020 pressure transducer is designed to measure pressure with extreme accuracy as stand-alone devices or as
incorporated in OEM type applications. It is characterized over a wide temperature range and is designed to be used in
environments that are much more harsh than tolerable by previous generations of Mensor pressure transducers.
3.3 Improper Use
WARNING!
Injuries through improper use
Improper use of the instrument can lead to hazardous situations and injuries.
▶Do not use the transducer within hazardous areas
▶Do not use the transducer with oxygen as a medium
▶Do not attempt to disassemble the transducer
Any use beyond or different than the intended use is considered improper use.
3.4 Responsibility of the Operator
The instrument is used in the industrial sector. The operator is therefore responsible for legal obligations regarding safety at work.
The safety instructions within these operating instructions, as well as the safety, accident prevention and environmental protection
regulations for the application area must be maintained.

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The operator is obliged to maintain the product label in a legible condition.
The operator must ensure that:
■Mechanical vibration, mechanical shock are minimized
■The transducer is installed in areas without soot, vapor, dust and corrosive gases
■The transducer is not used in hazardous environments, flammable atmospheres
■The operating personnel are regularly instructed in all topics regarding work safety, first aid and environmental protection and
know the operating instructions and in particular, the safety instructions contained therein
■The transducer is suitable for the particular application in accordance with its intended use
■Personal protective equipment is available
3.5 Personnel Qualification
WARNING!
Risk of injury should qualification be insufficient
Improper handling can result in considerable injury and damage to equipment.
▶The activities described in these operating instructions may only be carried out by skilled personnel who have the
qualifications described below.
Skilled personnel
Skilled personnel, authorized by the operator, are understood to be personnel who, based on their technical training, knowledge
of measurement and control technology and on their experience and knowledge of country-specific regulations, current standards
and directives, are capable of carrying out the work described and independently recognizing potential hazards.
Operating personnel
The personnel trained by the operator are understood to be personnel who, based on their education, knowledge and experience,
are capable of carrying out the work described and independently recognizing potential hazards.
Special knowledge for working with instruments for hazardous areas:
The skilled (electrical) personnel must have knowledge of ignition protection types, regulations and provisions for equipment in
hazardous areas.
Special operating conditions require further appropriate knowledge, e.g. of aggressive media.
Safety

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3.6 Personal Protective Equipment
The personal protective equipment is designed to protect the skilled personnel from hazards that could impair their safety or health
during work. When carrying out the various tasks on and with the instrument, the skilled personnel must wear personal protective
equipment.
Follow the instructions displayed in the work area regarding personal protective equipment!
The requisite personal protective equipment must be provided by the operating company.
Wear safety goggles!
Protect eyes from flying particles and liquid splashes.
Wear a protective helmet!
Protects the head from falling objects.
Wear safety shoes!
Protect feet from falling objects or objects lying around, as well as against toxic or hazardous liquids and aggressive
media.
3.7 Labeling, Safety Marks
3.7.1 Product Label
1Model 5Communications
2Range 6Power Requirements
3Accuracy 7Symbols
4Serial Number Date of Manufacture
Origin
8
9
Safety

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3.7.2 Symbols
Before mounting and commissioning the instrument, ensure you read the operating instructions!
CE, Communauté Européenne
Instruments bearing this mark comply with the relevant European directives.
This marking on the instruments indicates that they must not be disposed of in domestic waste. The disposal is
carried out by return to the manufacturer or by the corresponding municipal authorities (see EU directive 2012/19/
EU).
3.8 Warnings and Cautions
WARNING!
HIGH PRESSURE! High pressure gases are potentially hazardous. Energy stored in these gases and liquids can
be released suddenly and with extreme force. High pressure systems should be assembled and operated only by
personnel who have been trained in proper safety practices.
WARNING!
NOT EXPLOSION PROOF! Installation of this instrument in an area requiring devices rated as intrinsically safe is not
recommended.
WARNING!
POSSIBLE INJURY! The tubing, valves, and other apparatus attached to the gauge must be adequate for the
maximum pressure which will be applied, otherwise physical injury to the operator or bystanders is possible.
CAUTION
USE THE PROPER PRESSURE MEDIUM! Only use media compatible with materials of construction as specified .
This transducer is not designed for oxygen use.
CAUTION
As with most sensitive electronic equipment, switch the power switch off before connecting or disconnecting to a
power source to prevent data loss. Do not position the equipment so that it is difficult to disconnect the AC power
cord.
WARNING!
Detachable main power supply cord with inadequate ratings should not be used. See Section 9.2 Specifications for
power ratings.
Additional Warning and Caution notices are found throughout this manual.
Safety

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4. Transport, Packaging and Storage
4.1 Transport
Check the CPT6020 for any damage that may have been caused by transport.
Obvious damage must be reported immediately.
CAUTION!
Damage through improper transport
■While unlikely, with improper transport, damage can occur. When unloading packed goods upon delivery as well
as during internal transport, proceed carefully and observe the symbols on the packaging.
■If the instrument is transported from a cold into a warm environment, the formation of condensation may result in
instrument malfunction. Before putting it back into operation, wait for the instrument temperature and the room
temperature to equalize.
4.2 Packaging and storage
Permissible conditions at the place of storage
■Storage Temperature: -40 … 85˚C
■Humidity: 5 … 95% relative humidity (no condensation)
Avoid exposure to the following factors:
■Direct sunlight or proximity to hot objects
■Mechanical vibration, excessive mechanical shock
■Soot, vapor, dust and corrosive gases
■Hazardous environments, flammable atmospheres
Transport, Packaging and Storage

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Installation
5. Installation
Personnel: Skilled electrical personnel
WARNING!
READ THESE INSTRUCTIONS BEFORE INSTALLATION!
Only use original parts (see Chapter 10 “Accessories”).
WARNING!
Physical injuries and damage to property and the environment caused by hazardous media
Upon contact with hazardous media (e.g. oxygen, acetylene, flammable or toxic substances), harmful media (e.g.
corrosive, toxic, carcinogenic, radioactive), and also with refrigeration plants and compressors, there is a danger of
physical injuries and damage to property and the environment.
Should a failure occur, aggressive media with extremely high temperature and under high pressure or vacuum may
be present at the instrument.
▶For these media, in addition to all standard regulations, the appropriate existing codes or regulations must also be
followed.
▶Wear the requisite protective equipment (see Chapter 3.6 “Personal Protective Equipment”).
CAUTION
Damage to the Instrument
When working on open electrical circuits (printed circuit boards) there is a risk of damaging sensitive electronic
components through electrostatic discharge.
▶The correct use of grounded working surfaces and personal armbands is required.
5.1 Mounting
The transducer may be mounted via its process connection or with any ring clamps along its body. Having the sensor oriented in a
position other than vertical (with the port down) might cause a slight zero shift than can be removed by re-zeroing the transducer.
5.1.1 Pressure Connections
The CPT6020 has a JIC4 type female connection. When installing a mating connector, do not torque the connector with more than
13 ft-lbs or galling might occur. The transducer is supplied with a crush washer that can be used to further eliminate leaks.
5.1.2 Safety Relief Valves
Mensor recommends that an appropriately sized relief valve be placed in line with the pressure port of the transducer.
5.1.3 Pressure Media
A media comparable with the wetted parts of the transducer must be used.
CAUTION
USE THE PROPER PRESSURE MEDIUM! Only use media compatible with materials of construction as specified .
This transducer is not designed for oxygen use.

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5.1.4 Electrical Connections
Note: Power supply should be 9 to 18 VDC (12 VDC nominal).
The pinouts on the six pin connector and RS-232 and RS-485 Cable connections are:
External Connector Pinouts
Pin Function Pigtail Color
1RS-485 TX- White
2 +9-18V Brown
3 Ground Gray
4 RS-485 RX+ or RS-232 RX Black
5 RS-485 RX- Blue
6RS-485 TX+ or RS-232 TX Pink
HOST
DB9
COM
Female
GND
PWR
12 VDC
GR AY
BLACK
PINK
2
3
5
BROWN
RS-232
HOST
DB9
COM
Female
GND
PWR
12 VDC
GR AY
BLACK
PINK
2
3
5
BROWN
RS-485
9
1
BLUE
WHITE
Figure 5.1.2 COM Connection Pin-out and RS-232 / RS-485 cable connections
Installation

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Operation
6. Operation
6.1 General Operation
The CPT6020 transducer can be ordered with either an RS-232 or RS-485 full duplex output. The communications protocol is
defaulted to 57600,N,8,1. The baud rate can be changed via remote commands. Connector pinouts and RS-232 and RS 485
cable connections are shown in Figure 5.1.2. The transducer has multiple command sets with which it can communicate with the
host. These are set through the CMD_SET command.
6.1.1 Command and Query Format
Commands must be sent in ASCII format and terminated with a carriage return (<CR>) followed by a linefeed (<LF>). Commands
are not case sensitive. Query strings are terminated with a “?” prior to the termination character(s). If the transducer is put in a
burst output mode, the output of the transducer is in a binary output mode. The host communications program must synchronize
with the output of the transducer. The transducer’s output to a pressure value query is programmable depending on what the user
wants in the output string.
6.1.1.1 RS-485 Command and Query Format
On RS-485 versions of the CPT6020, the commands must be preceded by a “#”, an address or a “*”, and a space. In RS-485 the
ADDRESS command sets the address in ranges from “0” to “9” and “A” to “Z”. The global address character is the “*”. When data
is required for a command, a space (only) should delimit command and data fields.
6.1.1.2 RS-232 Command and Query Format
On RS-232 versions of the CPT6020, the “#” or address character is not necessary to precede the command for the Sensor
command set. But, the Mensor Legacy command set still requires a proceeding “#” and address character. With the default
sensor command set in RS-232, the start character and address character are not required.
6.1.1.3 Command Error Detection and Debugging
The CPT6020 has built in responses to correct and incorrect data. The responses can be used to help debug the software. In the
Sensor command set, the device will return “Ready” in response to a valid data command. If the device is in the Mensor Legacy
command set, an “R” will be returned in response to valid data. If the data is determined to be invalid, the Sensor command set
will return “Invalid Data”. The Mensor Legacy command set will still return an “R” character when invalid data is sent. This is a
limitation of the Mensor Legacy command set.The Sensor command set will return “Unknown command” if the command is not
found, while the Mensor Legacy command set will ignore it and not respond. This paragraph is summarized below in the following
table:
Mensor Legacy Command Set
Case Return Value
Valid data command “R”
Invalid data command “R”
Invalid command Nothing
Sensor Default Command Set
Case Return Value
Valid data command “Ready”
Invalid data command “Invalid Data”
Invalid command “Unknown Command”
Query Customer password protected command “User Password Needed”
Table 7.1.1 Command set returns for given cases
Also, it is important to note that when sent data is determined to be valid, the value will be stored in RAM. Only after the SAVE
command is sent is the data saved permanently. This applies to all command sets.

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Operation
6.1.2 CPT6020 Commands and Queries
Commands with complex outputs are explained In tables following the command set.
The following convention is used for the following command set tables:
n – 1 placeholder for digits and decimal point
C – 1 character placeholder for alpha character A-Z
<cr> - carriage return – ASCII 13
<lf> - line feed – ASCII 10
± - 1 place holder for a + or – sign, or blank which implies +
¬<sp> - 1 place holder for a space
X – address placeholder or ‘*’ for universal queries to be sent to all instruments
Y(1,2,3…) – strings as defined in description
<yy,mm,dd> - Last two digits of year, month, day.
All commands, queries, and responses will be terminated with a <cr><lf>.
All commands that are password protected are designated with “(Password Protected)” in the Query column below.
Global Commands
Query Command Data Description
N/A ADDRESS<sp><C> (RS-485 only) C Transducer address 0-9,
A-Z
*IDN?/ID? N/A Manu,Model,SN,SW Version Manufacturer, Model,
SN, SW Version
N/A SAVE Saves Data to EEPROM
TYPE? N/A C Pressure type - 1 char
FILTER? FILTER<sp><n> n Filter percentage 1 to 99
WINDOW? WINDOW<sp><nn> n Set 0 ... 99 to correspond
to a filter window of
0 ... 0.099%FS
BAUD? BAUD<sp><n> n Baud Rate - 9600,
19200, 57600, 115200
N/A CERR Clears Error stack
N/A DEFAULT Defaults parameters per
Table 6.1.3.2
CMD_SET? CMD_SET<sp><n> n Selects command set
per Table 2.1 (This
command is included in
all command sets.)
N/A PWD_CHANGE<sp><n,n> nnnn,nnnn Change password <n,n>
= <old,new>
N/A PWD<sp><n> nnnn Send password
Pressure Related Commands
PRESS? N/A Returns configurable
output from active
channel in current units
see Table 6.1.2.10
& Output Control
Commands section.

18 WIKA operating instructions process pressure transducer, model CPT6020
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Operation
RANGE_MIN? N/A +n.nnnnnnnE+nn Minimum range in
current units.
RANGE_MAX? N/A +n.nnnnnnnE+nn Maximum range in
current units
UNIT_INDEX? UNIT_INDEX<sp><n> n Mensor unit index: 1-39
or 99 for CUST_UNIT.
See Table 6.1.2.5
UNIT? N/A cccccccccc Unit text 10 char -
mmHg, psi, kPa…
CUST_UNIT? CUST_UNIT<sp><n> +n.nnnnnnnE+nn Sets custom unit
multiplication (xx/psi).
See Section 6.1.2.6
Calibration Related Commands
CAL_DATE? CAL_DATE<sp><yy,mm,dd>
(Password Protected)
nn,nn,nn Calibration date
SPAN? CAL_SPAN<sp><n>
(Password Protected)
+n.nnnnnnnE+nn Customer span multipler
- 0.99 to 1.01. See
Section 6.1.2.7
ZERO? CAL_ZERO<sp><n>
(Password Protected)
+n.nnnnnnnE+nn Customer zero adder.
See Section 6.1.2.7
N/A TARE<sp><n> n Turns tare on/off - 1/0
Temperature Related Command
TEMP? N/A +nnn.n Temperature in deg. C.
Output Control Commands
OUTPUT_MASK? OUTPUT_MASK<sp><n> n Configures output for
PRESS? Query and
Continuous Output– see
6.1.2.10
Table 6.1.2 – Sensor Command Set
Password Protection
In the Sensor Command Set, data that affects calibration is protected by a user settable 4 character password (designated as
“Password Protected”). The default password is “0000”. This is changed using the PWD_CHANGE command. It should be
changed once the user receives the device. The factory password will override the user’s password in the case that the user loses
their password.
Filter & Window
The filter is a percentage of the previous reading averaged with the current reading - as long as the current reading is within the
window of the previous reading. The window is set as a %FS of the transducer’s range. If the current reading is outside of the
window from the previous reading, the filter is unused and the current reading is displayed without manipulation. This scheme
allows the user to tune the transducer’s response as they like. It also allows the transducer to respond to rapid pressure changes
without having to change the filter. The default values are 0.01% FS for the window and a filter of 90%.

19
WIKA operating instructions process pressure transducer, model CPT6020
0020507001F 05/2019 EN
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Operation
6.1.2.1 Default Command
DEFAULT - This will default the following parameters to the shown settings:
Parameter Setting
Filter 90
Window 10
Baud 57600
CMD_SET 0
CUST_UNIT 1
Table 6.1.2.2 - Default Settings
6.1.2.2 Setting the Command Set
CMD_SET - This will set the transducer to communicate using different command sets:
Command Set Description
0 Sensor Default Command Set
1 Mensor Legacy
Table 6.1.2.3 – Command Set List

20 WIKA operating instructions process pressure transducer, model CPT6020
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Operation
6.1.2.3 Setting Pressure Units
UNIT_INDEX - This command sets the output units per the following table:
Unit Index Units Unit Index Units
1 psi 21 Torr
2 inHg 0C 22 kPa
3 inHg 60F 23 Pa
4 inH2O 4C 24 dy/cm2
5 inH2O 20C 25 g/cm2
6 inH2O 60F 26 kg/cm2
7 ftH2O 4C 27 MSW 0C
8 ftH2O 20C 28 osi
9 ftH2O 60F 29 psf
10 mTorr 30 tsf
11 inSW 0C 31 Not Used
12 ftSW 0C 32 uHg 0C
13 atm 33 tsi
14 bar 34 mHg 0C
15 mbar 35 hPa
16 mmH2O 4C 36 Mpa
17 cmH2O 4C 37 mmH2O 20C
18 MH2O 4C 38 cmH2O 20C
19 mmHg 0C 39 mH2O 20C
20 cmHg 0C 99 CUST_UNIT
Table 6.1.2.5 - Available Unit Codes and Units
6.1.2.4 Customer Units
The CUST_UNIT multiplier in conjunction with UNIT_INDEX 99 allows the user to set their own units. The CUST_UNIT is a
multiplier times psi to achieve the customer’s unit value.
6.1.2.5 Calibration Adjustments
SPAN & ZERO - These are calibration multipliers and offset respectively. The zero is an offset applied to all output pressure values.
The span is a multiplier times all pressure output values..