Portable Digital Pressure Gauge
CPG2300
Operating Instructions
Portable Digital Pressure Gauge CPG2300 Series PN 0017441001M • 10/2014
Portable Digital Pressure Gauge
CPG2300 Series
This Warning symbol indicates that danger of injury for persons
!
Warning
!
Caution
and the environment and/or considerable damage (mortal danger,
danger of injury) will occur if the respective safety precautions are
not taken.
This Caution symbol indicates danger for the system and
material if the respective safety precautions are not taken.
This Notice symbol does not indicate safety notices but
information for a better understanding of the facts.
2 Operating Instructions CPG2300 Series
Portable Digital Pressure Gauge
CPG2300 Series
Table of Contents
1. General Information 5
1.1 Warranty 5
1.2 Important Notice 5
1.3 Software License Agreement 6
1.4 Mensor Service Plus 6
1.4.1 After the Warranty 6
1.4.2 Calibration Services 6
1.4.3 Certifications and Accreditations 6
2. Safety Notices 7
2.1 Warnings and Caution Notices 7
3. Product Description 9
3.1 General Description 9
3.2 Display 9
3.3 Power Supply 9
3.4 Battery 9
3.5 Serial In/Out Communications 10
4. Specifications 11
5. Installation 13
5.1 Unpacking the Instrument 13
5.2 Dimensions 14
5.3 Pressure Connections 15
5.4 Electrical Connections 16
5.5 Power On 16
6. Local Operation 17
6.1 Keypad 17
6.2 Standard Display 18
6.3 Menu Screens 18
6.3.1 Main Menu Screen 18
6.3.2 Sensor Setup Menu 19
6.3.3 Password Entry Screen 21
Operating Instructions CPG2300 Series 3
Portable Digital Pressure Gauge
CPG2300 Series
6.3.4 Sensor Calibration Screen 21
6.3.5 Units Screens 23
6.4 Menu Tree 24
7. Remote Operation 25
7.1 General 25
7.2 Communication Syntax and Command Conventions 25
7.2.1 Password Protection 26
7.2.2 Response String Format 26
7.2.3 Commands and Queries 27
7.2.4 User Programmable Pressure Units List 30
7.2.5 Pressure Unit Codes and Conversions 31
8. Options 33
8.1 Current Input 33
8.1.1 Menu Screens 33
8.1.2 Operational Notes 35
8.1.3 Connection Configurations 36
8.1.4 Application Diagrams 37
9. Calibration 39
9.1 Environment 39
9.2 Equipment 39
9.3 Pressure Standard 41
9.4 Calibration Medium 41
9.5 Calibration Process 41
9.5.1 Zero Adjustment 41
9.5.2 Span Adjustment 42
4 Operating Instructions CPG2300 Series
Portable Digital Pressure Gauge
CPG2300 Series
1. General Information
1.1 Warranty
All products manufactured by Mensor are warranted to be free of defects in workmanship
and materials for a period of one 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
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 Important Notice
The product specifications and other information contained in this manual are subject to
change without notice.
Mensor has made a concerted effort to provide complete and current information for
the proper use of the equipment. If there are questions regarding this manual or the
proper use of the equipment, contact either Mensor or WIKA:
Mensor WIKA Alexander Wiegand SE & Co. KG
201 Barnes Drive Alexander-Wiegand-Straße 30
San Marcos, Tx 78666 D-63911 Klingenberg / Germany
Tel: 1.512.396.4200 Tel: (+49) 93 72/132-9986
1.800.984.4200 (USA only) Web Site: www.wika.de
Web Site: www.mensor.com Fax: (+49) 93 72/132-8767
Fax: . 512.396.1820 E-Mail: testequip@wika.de
E-Mail: sales@mensor.com
tech.support@mensor.com
Copyright © 2005, Mensor. All rights reserved.
Operating Instructions CPG2300 Series 5
Portable Digital Pressure Gauge
CPG2300 Series
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
If you have problems and you don’t find the answer in this manual, contact Mensor at
1.800.984.4200 (USA only) or 1.512.396.4200 for personal assistance, or at any of the
contact addresses listed on the rear cover of this manual. We are ready to help.
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 20,000 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 Z540-11994 standards.
6 Operating Instructions CPG2300 Series
Portable Digital Pressure Gauge
CPG2300 Series
2. Safety Notices
2.1 Warnings and Caution Notices
WARNING: NOT EXPLOSION PROOF! Installation of this instrument
!
Warning
!
Caution
!
Caution
in an area requiring devices rated as intrinsically safe is not recommended.
CAUTION: Some ranges require clean, non-corrosive pressure
media. See “Media Compatibility” in Section 4, Specifications. This
instrument is not designed for oxygen use.
CAUTION: Avoid excessive overpressure to the sensor! Externally
mounted relief valves to provide overpressure protection are available from Mensor as optional devices, and are highly recommended
for very low pressure sensors (less than 10 psi).
CAUTION: It is recommended that a backup wrench be used when
!
Caution
installing fittings or connections on the CPG2300.
CAUTION: Use of a power supply other than the one provided by
Mensor will invalidate the warranty.
!
Caution
CAUTION: ESD PROTECTION REQUIRED. The proper use of grounded work surfaces and personal wrist straps are required when
coming into contact with exposed circuits (printed circuit boards) to
prevent static discharge to sensitive electronic components.
Additional notices are found throughout this manual.
Operating Instructions CPG2300 Series 7
Portable Digital Pressure Gauge
CPG2300 Series
Notes
8 Operating Instructions CPG2300 Series
Portable Digital Pressure Gauge
CPG2300 Series
3. Product Description
3.1 General Description
The CPG2300 Digital Pressure Gauge is a portable battery powered instrument that
provides very high accuracy pressure measurements. This instrument utilizes very high
stability silicon sensors that are electronically compensated for pressure linearity over
the entire operating temperature range. The CPG2300 also has a standard RS-232
serial port that can be used for remote communications.
Different models are available including the Model 2310 (single channel) and the Model
2320 (dual channel). These channels are referred to as Channel A and Channel B, and
can operate independent of each other. Viewed from the front, Channel A is the sensor
on the top left of the instrument and can be ordered with any available pressure range
(see the Specifications section). Channel B is the sensor on the top right of the instrument and can be ordered with pressure ranges from 3 to 1000 psig (7.5 to 1000 psia).
Additionally, the CPG2300 can be equipped with optional current measurement from 4
to 20 mA and a 24V dc loop power. See the Options section for more information.
3.2 Display
Several different display screens are presented while operating the CPG2300. Each
screen is arranged into blocks of information, generally organized into columns and
rows. These screens are each described in further detail in the Local Operation and
Remote Operation sections.
3.3 Power Supply
The power adapter is utilized to provide power to operate the CPG2300 and also to recharge the internal batteries. It produces 12 Vdc @ 830 mA max.
3.4 Battery
The CPG2300 has an internal battery pack consisting of four ‘AA’ nickel-metal hydride
batteries. The battery pack is replaceable and can be ordered from Mensor.
In pressure measurement mode the CPG2300 will operate approximately 20 hours on a
fully charged new battery. There is a battery level indicator on the display that indicates
the battery charge level. The battery level indicator will blink when there is approximately one hour of battery left. The unit will automatically shut off when the battery reaches a
predetermined level.
Operating Instructions CPG2300 Series 9
Portable Digital Pressure Gauge
CPG2300 Series
Battery Charging: The CPG2300 has a built-in battery charger that will take approximately 8 hours with an input supply of 12VDC to fully recharge a battery. The built-in
charger will switch from fast charge to maintenance mode automatically when a full
charge is achieved. It is acceptable to leave the wall transformer connected to AC
power indefinitely.
Charge Voltage vs. Temperature: The battery can be charged over an ambient
temperature range of 0 to 40 degrees C with a supply voltage of 9 to 12 VDC.
3.5 Serial In/Out Communications
The serial port is configured as RS-232, 9600 baud, 8 data bits, 1 stop bit and no parity.
It is designed as a 9-pin DCE device, so that a straight pin to pin cable can be used to
connect it to a standard PC serial port. The serial port can be used to configure and
calibrate the CPG2300 or to read the output of its sensors.
Wiring requirements are provided in the Installation section and a list of valid commands
and responses (Table 7.2.3) is provided in the Remote Operation section.
10 Operating Instructions CPG2300 Series
Portable Digital Pressure Gauge
CPG2300 Series
4. Specifications
Accuracy specifications presented herein are obtained by comparison with primary
standards traceable to the National Institute of Standards and Technology (NIST). These
specifications are obtained in accordance with the ISO Guide to the Expression of
Uncertainty in Measurement (GUM). The calibration program at Mensor is accredited
by the American Association of Laboratory Accreditation (A2LA) as complying with both
the ISO/IEC 17025:2005 and the ANSI/NCSL Z540-1-1994 standards.
Mensor reserves the right to change specifications without notice.
Total Uncertainty 0.015% FS over compensated temperature range for 180 days.
Pressure Ranges Channel A: 7.5 to 6,000 psia
0.36 to 6,000 psig
Channel B: 7.5 to 1000 psia
3 to 1000 psig
Calibration Interval 180 days
Resolution 5 digits
Overpressure Limit 1.5 x span
Storage -20 ... 70ºC
Warmup <1 minute
Reading Rate ~4.6 / second
Response Time <252 mS
Orientation Negligible >30 psi, zero offset resettable with zero calibration
or null function.
Communications RS-232, 9600 baud,N,8,1
Case size T-shaped, 8.6 inches H x 4.3 inches W x 1.6 inches D
Weight 1.5 lbs.
Media
Compatibility
Pressure port: Clean, dry, non-corrosive, non-combustible,
non-oxidizing gases for all ranges.
Ranges ≥ 5 psi: Media compatible with aluminum, 316 SS,
Buna N, Viton, silicone grease and RTV.
Cannot guarantee accuracy on media other than gases.
Not designed for oxygen service.
Reference port: Clean, dry, non-corrosive gases.
Operating Instructions CPG2300 Series 11
Portable Digital Pressure Gauge
CPG2300 Series
Battery Life 20 hours
Recharge Time 8 hours max.
Power
Requirements
Fittings 1/4 inch FNPT pressure ports, nom. 1/16 inch hose barb for ref
Warranty One year
Options Carrying pouch - attaches to belt
Current Input Option Battery life: ~4 hours with loop power @ 20mA, and 10 hours
Units psi, inHg @0C and 60F, inH2O @4C, 20C, bar, mbar, mmHg @
Display Monochrome 128 x64 LCD, with white LED back light.
CE Compliant to EN50081 and EN50082.
+9 to +14.5 VDC, 830mA max for battery recharge.
ports.
Hand pump
Relief valves (mounted externally)
with loop power @ 4mA.
Current measurement: 4 to 20 mA (calibrated).
Loop power voltage: 24V unregulated.
Current uncertainty: 0.015% of R.
0C, cmHg @0C, hPa, kPa, Pa, MPa, kg/sq cm, cmH2O @4C,
cmH2O @20C, mSW @0C.
12 Operating Instructions CPG2300 Series
Portable Digital Pressure Gauge
CPG2300 Series
5. Installation
5.1 Unpacking the Instrument
In addition to functional testing, each unit is inspected for appearance prior to leaving
the factory. Upon receipt, please examine the transducer for shipping damage. Report
any apparent damage to the carrier immediately.
In addition to this manual you should have:
• CPG2300 Digital Pressure Gauge;
• Power adapter (charger)
• Any accessories ordered;
• An envelope containing the Calibration Certificate.
Operating Instructions CPG2300 Series 13
Portable Digital Pressure Gauge
CPG2300 Series
5.2 Dimensions
Figure 5.2 - Case Outline/Dimensions
14 Operating Instructions CPG2300 Series
Portable Digital Pressure Gauge
CPG2300 Series
5.3 Pressure Connections
The left 1/4 inch FNPT threaded port is used to measure the pressure on Channel A of
the CPG2300. If the sensor range is less than 20 psi and is a gauge or bi-directional
sensor, there will also be a 1/16 inch hose barb fitting beside the pressure port. The
barb fitting provides access to the reference port of the sensor.
If the CPG2300 has a second pressure sensor installed, it will have a second 1/4 inch
FNPT threaded port on the right to measure the pressure on Channel B. If its range is
less than 20 psi and it is a gauge sensor, a barb fitting provides access to the reference
port of the sensor.
CAUTION: Avoid excessive overpressure to the sensor! Externally
!
Caution
mounted relief valves to provide overpressure protection are available from Mensor as optional devices, and are highly recommended
for very low pressure sensors (less than 10 psi).
!
Caution
Operating Instructions CPG2300 Series 15
CAUTION: It is recommended that a backup wrench be used when
installing fittings or connections on the CPG2300.
Sense +
INPUT JACK (red)
Sense INPUT JACK (black)
(for Input Current Option)
Figure 5.3 - Pressure and Electrical Connections
Portable Digital Pressure Gauge
CPG2300 Series
5.4 Electrical Connections
For RS-232 serial port operation, connect the CPG2300 to the host computer per Figure 5.4a. Notice that the host TRANSMIT line is connected to the CPG2300 RECEIVE
line (TX to RX), and vice versa.
The power connector is a 2.1 mm standard power jack. The center pin is +12 Vdc and
the outside is ground (see Figure 5.4b).
Figure 5.4a - RS-232 Hookup
Figure 5.4b - DC Input
5.5 Power On
After the pressure connections are secure, press the power switch (
). The CPG2300
will run through a brief initialization sequence and then will display the sensor channel(s)
that was active when turned off last.
16 Operating Instructions CPG2300 Series
Portable Digital Pressure Gauge
CPG2300 Series
6. Local Operation
6.1 Keypad
A brief description of the keypad features and the display is provided below in Figure
6.1, “Keypad and Display Features”.
Display Screen
Displays user data and menu
setup screens to access or
change various functions.
The standard display screen
(shown) provides user info for
the active sensor channel(s),
pressure reading(s), engineering unit(s) and battery level.
Label
The label lists the serial number
and pressure ranges.
Arrow Keys (4)
The “Enter” Key
The central ◆ key is used
as an enter key to select the
highlighted menu choice or for
single button null.
The “Main Menu” Key
The M key beings up the main
menu.
The four arrow keys typically
provide navigation in the menus.
They are also used to adjust the
displayed pressure for calibration adjustment and adjustment
of the programmable user unit.
Power Switch
This key is the power on/o
switch.
Figure 6.1 - Keypad and Display Features
Operating Instructions CPG2300 Series 17
Portable Digital Pressure Gauge
CPG2300 Series
6.2 Standard Display
When the CPG2300 is powered on, the sensor channel(s) that was active when the
CPG2300 was turned off previously will be displayed after the initialization screen. The
standard display screen is shown below.
Figure 6.2 - Standard Display Screen
6.3 Menu Screens
All the menu screens can be navigated by use of the arrow keys. To select a menu item,
highlight the item and press the ♦ (enter) key.
6.3.1 Main Menu Screen
If the M (menu) key is pressed at any time, the main menu is displayed on the screen. If
one sensor is installed in the CPG2300, the Sensor A setup screen is displayed. If two
sensors are installed in the CPG2300, the following will be displayed:
Main Menu
Sensor A A Setup
Sensor B B Setup
Sensor A&B
The items in this menu perform the following functions when selected:
Sensor A: Displays only the A Sensor.
Sensor B: Displays only the B Sensor.
Sensor A&B: Displays both the A and the B Sensor.
Sensor A setup: Displays the Sensor A setup screen.
Sensor B setup: Displays the Sensor B setup screen.
18 Operating Instructions CPG2300 Series
Portable Digital Pressure Gauge
CPG2300 Series
6.3.2 Sensor Setup Menu
Both the Sensor A and Sensor B setup menu screens are identical. These menus allow
setup of various functions for the selected sensor.
A Setup
Peak Off Peak Rst
Null Off Cal
Units
Peak Off Peak Rst
Null Off Cal
B Setup
Units
The items in this menu perform the following functions when selected:
Peak Off (On): Toggles the peak indicator for the active sensor.
A Setup
Peak On Peak Rst
Null Off Cal
Units
The current condition of the peak indicator is displayed.
If the menu item displays “Peak Off”, the peak indicator
is disabled for the active sensor. If “Peak Off” is
selected, it will enable peak capture for the active
sensor. If the Sensor Setup menu is re-entered, the
menu item will display “Peak On” to indicate that the
peak capture function is enabled.
Peak readings are displayed only when a single channel is selected.
Peak Reset: Resets the peak values to the active measured pressure.
A Setup
Peak Off Peak Rst
Null Off Cal
Units
Operating Instructions CPG2300 Series 19
Portable Digital Pressure Gauge
CPG2300 Series
Null Off (On): Toggles the null function for the active sensor.
A Setup
Peak Off Peak Rst
Null On Cal
Units
The current state of the null function is displayed. If
the menu item displays “Null Off”, the null function is
disabled for the active sensor. If “Null Off” is selected,
the CPG2300 will subtract the current measured
pressure from any subsequent pressure readings. Unlike
the Peak function, the Null function can be displayed on
the main operation screen with both sensors pressures
displayed. A capital “N” appears just above the “A” or
“B” on the main operation screen to indicate that the
sensor channel is currently using a null offset.
Single button null: The null feature can also be accessed by pressing the ♦ (enter) key
while at the standard Display. When both channels are displayed, pressing the null
button once will null channel A. Pressing the null button a second time will null channel
B. Pressing the null button a third time will un-null channel A and a fourth press will unnull channel B. When a single channel is displayed the null button will toggle nulling on
or off. The instrument will revert to the un-nulled state if power is cycled.
1. Peak and Null functions can be used simultaneously.
2. Pressure units must not be changed when using the null feature.
Cal: Displays the calibration password entry screen.
A Setup
Peak Off Peak Rst
Null Off Cal
Units
Sensor A Calibration
Password Entry
Enter to Continue
Units: Displays the first of the three units screens.
PSI InHg 0c
InHg 60f InH20 4c
InH20 20c mBAR
BAR more
20 Operating Instructions CPG2300 Series
Portable Digital Pressure Gauge
CPG2300 Series
6.3.3 Password Entry Screen
If the calibration function is selected from the sensor setup screen, the password entry
screen will be displayed:
Sensor A Calibration
Password Entry
The four digit password can be entered by moving the
cursor with the left and right arrow keys under the digit
to be changed and then pressing the up or down arrow
Enter to Continue
keys to scroll through the numbers 0 to 9. When the
password is entered, press the ♦ (enter) key. The active
channel’s calibration screen will be displayed.
6.3.4 Sensor Calibration Screen
The sensor calibration screen allows the zero and span of the active sensor to be adjusted, the calibration to be reset to the factory defaults, and the calibration password
to be changed.
A Calibration
Cal Zero Cal Span
Change PW Reset Cal
The items in the calibration menu perform the following functions when selected:
Cal Zero: Displays the measured pressure for the active sensor.
MA Calibration
Cal Zero Cal Span
Change PW Reset Cal
Adjust the digits to the true pressure applied to the
active sensor and press the ♦ (enter) key to store the
value. For more details, see the Calibration section.
Cal Span: Displays the measured pressure for the active sensor.
MA Calibration
Cal Zero Cal Span
Change PW Reset Cal
Operating Instructions CPG2300 Series 21
Adjust the digits to the true pressure applied to the
active sensor and press the ♦ (enter) key to store the
value. For more details, see the Calibration section.
Portable Digital Pressure Gauge
CPG2300 Series
Change Password:
A Calibration
Cal Zero Cal Span
Change PW Reset Cal
Sensor A Calibration
Password Entry
Enter to Continue
Move the cursor with the left and right arrow keys under the digit to be changed.
Increment the digit with the up and down arrow keys. When the password has been
changed, press the ♦ (enter) key to store it. The main menu is then displayed.
The password is set to “0000” at the factory. When making a change
!
write it down and save the number. If the password is lost contact
Mensor.
Caution
Reset Cal: Displays a confirmation screen.
A Calibration
Cal Zero Cal Span
Change PW Reset Cal
Reset Calibration
Sensor B
Are you Sure?
Enter to Reset
Other Keys to Quit
If the ♦ (enter) key is pressed, the calibration is reset to the factory defaults and the
main operation screen is displayed. If any other key is pressed, the main menu screen is
displayed.
22 Operating Instructions CPG2300 Series
Portable Digital Pressure Gauge
CPG2300 Series
6.3.5 Units Screens
Pressure units must not be changed when using the null feature.
There are three units screens that allow selection of the most common pressure units:
PSI InHg 0c
InHg 60f InH20 4c
InH20 20c mBAR
BAR more
mmHg 0c cmHg 0c
Pa hPa
kPa mPa
ks/cm^2 more
cmH20 4c cmH20 20c
MSW User
Set User more
The pressure unit of the active sensor is selected by highlighting the desired unit and
pressing the ♦ (enter) key. To advance to the next units screen, select “more”. The last
units screen allows selection and entry of a special “User” unit. The User unit has a
configurable conversion factor that converts from PSI to the desired value. To enter the
conversion factor, select “Set User” on the last units screen to display:
Set User Units A
+1.00000e+1
Enter to Continue
Use the left and right arrow keys to move the cursor under the digit to change and the
up and down arrow keys to increment the digit. The conversion factor can be set from
-1.00000e+6 to -1.00000e-6 and +1.00000e-6 to +1.00000e+6. Press the ♦ (enter) key
to store the conversion factor. To apply the “user” conversion factor, the units “User”
must be selected for the active sensor.
For the remote programmable pressure units list and information,
see “User Programmable Pressure Units List” in the Remote
Operation section of this manual.
Operating Instructions CPG2300 Series 23
Portable Digital Pressure Gauge
CPG2300 Series
6.4 Menu Tree
CPG2300
Figure 6.4 - CPG2300 Menu Tree
24 Operating Instructions CPG2300 Series
Portable Digital Pressure Gauge
CPG2300 Series
7. Remote Operation
7.1 General
The CPG2300 can be operated from a remote computer which communicates over
a standard RS-232 serial port. The serial port can be used to configure and calibrate
the CPG2300, or to read the output of its sensors. This section of the manual provides
information on the serial port configuration, explains the command conventions used in
this manual, and lists the common commands and queries which are recognized by the
CPG2300.
7.2 Communication Syntax and Command Conventions
All commands and responses are in ASCII characters. The lower and upper case are
interpreted the same. Every command or query begins with the pound symbol (#). The
question mark (?) character is significant to the CPG2300. All other punctuation characters are ignored. Some commands require a password string. A carriage return (<cr>)
and/or linefeed (<lf>) must terminate each command or query. The global address character is an asterisk (*). It can be sent in place of the actual CPG2300 address.
All of the commands are channel dependent. If sensor A is selected by sending #XCH
A, all subsequent queries and commands work on channel A until #XCH B is sent. The
active channel should always be checked before sending commands, as the channel
status can be controlled by keypad also. Upon power-on the active channel is dependent on pressure display. Channel B is active when sensor B only is displayed. For all
other pressure displays (A or A&B) the Channel A is active. In the case of a single channel unit, Channel A is always active.
It is good practice to query for the active channel before sending commands that
change a sensors operating parameters. See Table 7.2.3 for commands and queries.
Operating Instructions CPG2300 Series 25
Portable Digital Pressure Gauge
CPG2300 Series
7.2.1 Password Protection
Certain commands require a password to be sent before a setting is changed. The
password is only effective for the next command, so the password must be sent immediately before any password protected command string. The password string is the
password set in the CPG2300. The password is set at the factory to “0000”. However,
for calibration protection, the actual password has been replaced with PW in the command string example.
7.2.2 Response String Format
All strings sent by the CPG2300 are terminated by a carriage return <cr> and linefeed
<lf>.The CPG2300 will return an “R” character (ASCII 82) to indicate that it has received
a valid command or password rather than a query. If an invalid command or password
is sent, the “R” character will not be returned. When communicating with the CPG2300,
the “R” character must be received before sending additional commands or queries. In
the event that an invalid command could be sent, a time-out period of approximately
one second should be used before sending the next command or query.
The full command word is shown in Table 7.2.3 in all capital letters. Other conventions
used to describe commands are shown in Table 7.2.2.
Table 7.2.2 - Command Conventions
Convention Description
X Address (single character 0 through 9 or A through Z; case insensitive)
* Global address character
? Query operator
<sp> Space ( )
PW Password (insert password in place of PW; case insensitive)
N One character place holder for digit or decimal point
n...n Variable length field
R Ready response
26 Operating Instructions CPG2300 Series
Portable Digital Pressure Gauge
CPG2300 Series
7.2.3 Commands and Queries
i
Each command that changes a parameter is volatile until the SAVE command is issued.
Notice
Table 7.2.3 - Command Set
Pass-
word
Protect
No ? #X?<cr><lf> The return string from a pressure reading query”?” can
Command
/ Query
Command String Return String Description
have different formats dependent upon how the unit is set
up. If the LCD display is displaying sensors A & B and the
“DSP?” query returns 3, the return string will return two
values. The first is sensor A and the second is sensor B.
Example format: 0 -0.001, +14.456<cr><lf>
If the LCD display is displaying either sensor A or B only
and the “DSP?” query returns 1 or 2, the return string will
return a single value from the selected sensor.
Example format: 1 +14.471<cr><lf>
If the peak function is enabled the return string will contain three values. The first value is the maximum pressure,
the second is the present pressure and the third is the
minimum pressure. This return string is representative
of the active channel. Note that when both channels are
selected (“DSP?” = 3) the A & B readings are returned.
Example of the peak return string format: 1 +14.701,
+14.456, +14.300<cr><lf>.
No A #XA<sp>n<cr><lf> R Sets address of CPG2300 to 0-9
No CH? #XCH?<cr><lf> X<sp>n<cr><lf> Returns active channel “A” or
No CH #XCH<sp>n<cr>
<lf>
No CPW #XCPW<sp>nn
nn<cr><lf>
Operating Instructions CPG2300 Series 27
R Sets active sensor channel where
R Enter customer password.
or A-Z.
“B”.
n is A or B.
Portable Digital Pressure Gauge
CPG2300 Series
No CSC? #XCSC?<cr><lf> X<sp>n.nnn<cr><lf> Available only with the Current
Yes CSC #XCSC<sp>n.nnn
<cr><lf>
No CZC? #XCZC?<cr><lf> X<sp>n.nnn<cr><lf> Available only with the Current
Yes CZC #XCZC<sp>n.nnn
<cr><lf>
No DC? #XDC?<cr><lf> X<sp>DC<sp>nn
Yes DC #XDC<sp>nnnnnn
<cr><lf>
No DSP? #XDSP?<cr><lf> X<sp>DSP<sp>N
No DSP #XDSP<sp>n<cr>
<lf>
No FL? #XFL?<cr><lf> X<sp>FL<sp>nn
No FL #XFL<sp>nn
<cr><lf>
No FS? #XFS?<cr><lf> X<sp>FS<sp>nnnnn
No I? #XI?<cr><lf> X<sp>nn.nnn<cr><lf> Available only with the Current
No ID? #XID?<cr><lf> X<sp>ID<sp>nn
No NOS? #XNOS?<cr><lf> X<sp>NOS<sp>n
R Available only with the Current
R Available only with the Current
nnnn<cr><lf>
R Loads the date of calibration
<cr><lf>
R Loads display mode where 1 =
<cr><lf>
R Sets the filter percentage ranges
<cr><lf>
MENSOR, <sp>nnnn
64nn,<sp>nnnnnnnn,
<sp>Vn.nn<cr><lf>
<cr><lf>
Input option. Returns span
correction multiplier for current
measurement.
Input option. Sets span correction multiplier for current measurement. Ranges from .95 to
1.05.
Input Option. Returns the zero
offset for the current measurement.
Input Option. Sets the zero offset
for current measurement. Ranges
from +/- .8 mA.
Returns the date of calibration
where nnnnnn is mmddyy.
where nnnnnn is mmddyy.
Returns display mode where 1 =
Sensor A, 2 = Sensor B,
3 = Sensors A&B
Sensor A, 2 = Sensor B,
3 = Sensors A&B
Returns the filter percentage.
from 0 to 99.
Returns the CPG2300 accuracy.
Measurement option; Returns
current measurement in milliamps.
Returns the CPG2300 ID string.
Returns number of sensors
installed in the CPG2300.
28 Operating Instructions CPG2300 Series
Portable Digital Pressure Gauge
CPG2300 Series
No NULL? #XNULL?<cr><lf> X<sp>NULL<sp>n
No NULL #XNULL<sp>n<cr>
<lf>
No PEAK? #XPEAK?<cr><lf> X<sp>PEAK<sp>n
No PEAK #XPEAK<sp>n
<cr><lf>
No R-? #XR-?<cr><lf> X<sp>R-<sp>nnnnn
No R+? #XR+?<cr><lf> X<sp>R+<sp>nnnnn
No RST<sp> #XRST<sp><cr>
<lf>
No SAVE #XSAVE<cr><lf> R Saves all data to memory.
No SC? #XSC?<cr><lf> X<sp>SC<sp>nnn
Yes SC #XSC<sp>nnnnnn
<cr><lf>
Yes SCPW #XSCPW<sp>nnnn
<cr><lf>
No T? #XT?<cr><lf> X<sp>T<sp>n<cr>
No U? #XU?<cr><lf> X<sp>U<sp>nn<cr>
No U #XU<sp>nn<cr><lf> R Sets the units code for the active
No USR? #XUSR?<cr><lf> X<sp>USR<sp>nn
No USR #XUSR<sp>n
<cr><lf>
Operating Instructions CPG2300 Series 29
<cr><lf>
R Sets null mode on or off for cur-
<cr><lf>
R Sets peak mode on or off for cur-
<cr><lf>
<cr><lf>
R Resets peak values for the active
nnnn<cr><lf>
R Sets the span correction
R Sets the customer password.
<lf>
<lf>
nnnnnnnennnn
<cr><lf>
R Sets user selected units for the
Returns mode status of active
sensor for null where
n = 0 = OFF, n =1 = ON
rent channel where n = 0 = OFF,
n = 1 = ON.
Returns mode status of active
sensor for peak capture where
n = 0 = OFF, n = 1 = ON
rent channel where n = 0 = OFF,
n = 1 = ON.
Returns minimum pressure range
of active sensor in PSI.
Returns maximum pressure
range of active sensor in PSI.
sensor. A space must be included after the RST command.
Returns the span correction
multiplier for the active sensor.
multiplier for the active sensor.
Returns the pressure type for the
active sensor; A = Absolute,
G = Gauge, B = Bi-directional.
Returns pressure unit code.
For a complete list of pressure
unit codes and conversions, see
Table 7.2.5.
sensor.
Returns the user unit multiplier
for the active sensor.
active sensor.
Ranges from -1.00000e+6 to
-1.00000e-6 and from
+1.00000e-6 to +1.00000e+6.
Portable Digital Pressure Gauge
CPG2300 Series
No UT? #XUT?<cr><lf> X<sp>UT<sp>N,
No UT #XUT<sp>N<sp>
N<cr><lf>
No ZC? #XZC?<cr><lf> X<sp>ZC<sp>nn
Yes ZC #XZC<sp>nnnnnn
<cr><lf>
<sp>N,<sp>N,...
<cr><lf>
R Loads the programmable units
nnnnn<cr><lf>
R Sets the zero offset for the active
Returns the list of programmed
pressure units.
list. The first number is the
sequential position in the list from
0 to 7 and the second number
is the unit code as according to
Table 7.2.5.
Returns the zero offset for the
active sensor.
sensor.
7.2.4 User Programmable Pressure Units List
The remote command UT can be used to modify the default pressure units available on
the units display screen. The user can select from one to eight units to be displayed by
sending a sequence of “UT” commands. The syntax is as follows:
#*UT<sp>n<sp>n<cr><lf> where the first “n” is a value from 0 to 7 and represents the
units sequential position in the displayed list. The second “n” represents the unit code
from Table 7.2.5. If the first (0) unit in the sequence is assigned a value of “0” then the
displayed units will default to all the available units from the factory. To display less than
eight units, a “0” is assigned to the next unit in the sequence.
An example of the use of the “UT” command:
#*UT 0 1<cr><lf> - assigns the first unit displayed as PSI
#*UT 1 2<cr><lf> - the next unit displayed would be InHg 0C
#*UT 2 34<cr><lf> - the third unit displayed would be hPa
#*UT 3 0<cr><lf> - terminates the displayed units to this point
#*UT 0 0<cr><lf> - allows all factory units to be displayed and used
i
Notice
30 Operating Instructions CPG2300 Series
The “SAVE” command must be sent to make changes permanent.
Portable Digital Pressure Gauge
CPG2300 Series
7.2.5 Pressure Unit Codes and Conversions
Table 7.2.5 - Pressure Unit Codes and Conversions
Code Pressure Unit PSI Conversion Factor
0 Counts N/A
1 psi 0
2 inHg 0C 2.036020
3 inHg 60F 2.041772
4 inH2O 4C 27.680672
5 inH2O 20C 27.729767
14 bar 0.06894757
15 mbar 68.94757
17 cmH2O 4C 70.3089
19 mmHg 0C 51.71508
20 cmHg 0C 5.171508
22 kPa 6.894757
23 Pa 6894.757
26 kg/sq cm 0.07030697
27 mSW @0C (@3.5% salinity) 0.6838528
34 hPa 68.94757
36 MPa 0.006894757
38 cmH2O 20C 70.4336
99 User User Settable
Operating Instructions CPG2300 Series 31
Portable Digital Pressure Gauge
CPG2300 Series
Notes
32 Operating Instructions CPG2300 Series
Portable Digital Pressure Gauge
CPG2300 Series
8. Options
8.1 Current Input
The current input option is capable of measuring current from 3 to 24 milliamps (mA).
The calibrated range is from 4 to 20 mA. The CPG2300 also provides a 24V dc loop
power source which can be turned on or off and that will power most transmitters. The
CPG2300 current measurement is protected from over-current or high voltage up to
50V. It also has circuitry to prevent damage if the loop power is enabled and the input
terminals are shorted. To preserve battery life, the current measurement mode and loop
power are turned off through a power cycle. The input section is protected from overcurrent or high voltage input by a comparator controlled mosfet that will limit the current
to a nominal of 24.8 mA. When the resident loop power is enabled, the current limiter
circuit will protect the instrument if the input terminals are shorted together.
8.1.1 Menu Screens
Main Menu: The current input is set up using the “mA Input” selection in the main
menu. This menu item will not be displayed unless the current input option is installed.
Select the setup screen by pressing the ♦ (enter) key.
Main Menu
Sensor A A Setup
Sensor B B Setup
Sensor A&B mA Input
mA Input Setup: The items in this menu perform the following functions when selected:
mA Input Setup
Display mA Off
Source V Off
Calibrate mA
Display mA Off (On): Enables/disables current measurement by toggling the enter key.
mA Input Setup
Display mA On
Source V Off
Calibrate mA
Operating Instructions CPG2300 Series 33
Portable Digital Pressure Gauge
CPG2300 Series
Source V Off (On): Enables/disables 24V loop power source by toggling the enter key.
mA Input Setup
Display mA Off
Source V On
Calibrate mA
Calibrate mA: Displays the calibration password entry screen.
mA Input Setup
Display mA Off
Source V Off
Calibrate mA
Password Entry Screen: If the calibrate mA function is selected from the mA Input
Setup screen, the password entry screen will be displayed:
mA Calibration
Enter to Continue
mA Calibration Screen: The mA calibration screen allows zero and span to be adjusted, the calibration to be reset to the factory defaults or the calibration password to be
changed.
MA Calibration
Cal Zero Cal Span
Change PW Reset Cal
34 Operating Instructions CPG2300 Series
Portable Digital Pressure Gauge
CPG2300 Series
Cal Zero and Cal Span Screens: Digits are selected by using the right or left arrow
keys. The selected digit has a cursor below it. Adjustments of the digit is by the up or
down arrow keys. Current input zero and span adjustments are limited to 5% of the
range (16 mA). This would be +/- 0.8 mA. Press enter key to store the change.
mA Input
Zero Calibration
+4.001
mA
Enter True Current
mA Input
Zero Calibration
+20.002
mA
Enter True Current
8.1.2 Operational Notes
When the current measurement option is enabled the value is displayed as the alternate
channel to the pressure channel that is selected. This means when “Sensor A” is selected as the pressure measurement channel the pressure will be displayed as the top
reading and the current measurement will be the bottom reading.
The display order is reversed when “Sensor B” is selected.
Both pressure channels can also be displayed while the current measurement channel
is active by selecting “Sensor A&B”. The current measurement can then be acquired
over the serial port. This is accomplished by issuing the “I?” command (see Remote
Operation section).
The peak pressure indication function can not be enabled when the
current input is enabled. The null feature will work when the current
input is enabled.
Operating Instructions CPG2300 Series 35
Portable Digital Pressure Gauge
CPG2300 Series
8.1.3 Connection Configurations
The diagrams shown are of typical current measurement connections. The insertion
resistance is 100 ohms. The “Sense +” jack (red) is inserted on the high-side and the
“Sense –” jack (black) is inserted on the low-side in the loop.
The pressure port fittings, and the d-sub shell of the RS-232
connector are electrically common to the “Sense –” connection
each through 1 Meg ohm resistors. The RS-232 digital ground is
connected directly to the “Sense –”. The connections should be
isolated from the current loop connections.
Figure 8.1.3 - Electrical Diagram (Current Input option)
36 Operating Instructions CPG2300 Series
Portable Digital Pressure Gauge
CPG2300 Series
8.1.4 Application Diagrams
Figure 8.1.4a - Connections in a powered loop
Figure 8.1.4b - Connections using CPG2300 loop power
Operating Instructions CPG2300 Series 37
Portable Digital Pressure Gauge
CPG2300 Series
Notes
38 Operating Instructions CPG2300 Series
Portable Digital Pressure Gauge
CPG2300 Series
9. Calibration
The CPG2300 automatically adjusts the pressure readings for the effects of temperature
and non-linearity within the calibrated temperature range of 0-50°C. Thus, a calibrated
CPG2300 operated within its temperature band, and with proper zero and span settings, will provide accurate pressure measurements.
The sensor should have the span verified periodically to insure its stability. Initially, the
recommended period between calibrations is 180 days. This period may be extended
as confidence is gained in the span stability.
9.1 Environment
Whenever possible, calibrate the CPG2300 at the same ambient temperature as
its normal operating environment. The temperature should be stable and within the
specified calibration range. In addition, for maximum accuracy, see that the CPG2300 is
at rest on a stable platform which is free of vibration and shock, and oriented similar to
its operating attitude.
9.2 Equipment
The following equipment is needed to calibrate a gauge transducer (see Figure 9.2):
1. A pressure source with a line-pressure regulator to cover the full scale pressure
range of the CPG2300.
2. A hand operated variable-volume pressure vernier (volume controller).
3. A metering valve and two isolating valves for Vent and Supply Pressure.
4. A pressure calibration standard.
5. Tubing and fittings adequate for the pressure range.
Additional equipment required to calibrate sub-atmospheric transducers (absolute,
vacuum or bi-directional pressure types) is illustrated in Figure 9.2. These items are:
6. A vacuum pump capable of pumping down to 300 millitorr.
7. A vacuum standard to measure pressures down to 300 millitorr.
8. One additional valve to isolate the vacuum line.
Operating Instructions CPG2300 Series 39
Portable Digital Pressure Gauge
CPG2300 Series
CPG2300
PRESSURE GAUGE
CPG2300
PRESSURE GAUGE
Figure 9.2 - Calibration Setup
40 Operating Instructions CPG2300 Series
Portable Digital Pressure Gauge
CPG2300 Series
9.3 Pressure Standard
Mensor recommends the use of appropriately accurate primary pressure standards
when calibrating this instrument. Such standards should be sufficient so that when the
techniques of the ISO Guide to the Expression of Uncertainty in Measurement (GUM)
are applied, the instrument meets its accuracy statements as required by ISO 17025, or
other applicable standards. The same requirement applies to the vacuum gauge used to
set the zero offset on absolute calibrations. The recommended absolute pressure level
for setting the zero offset is ≥ 300 millitorr.
9.4 Calibration Medium
The recommended calibration medium for sensors up to 2500 psi is dry nitrogen. Hydraulic media (water or oil for example) are recommended for ranges above 2500 psi.
Hydraulic media can be used with some lower ranges. However, special techniques
must be used in filling the connection lines and transducer.
9.5 Calibration Process
The calibration process described below is for local operation via the instrument keypad. Connect the CPG2300 sensor to be calibrated as shown in Figure 9.2.
When the Calibration function is selected from the sensor setup screen, the password
entry screen will be displayed. Enter the four-digit password and then press the ♦
(enter) key. For more information on entering or changing the password, see the Local
Operation section.
9.5.1 Zero Adjustment
Access the zero calibration screen as described in the Local Operation section.
For a gauge sensor: Vent the CPG2300 and adjust the display to show zero pressure
by using the arrow keys on the front panel. When zero is shown, press the ♦ (enter) key.
For an absolute sensor: Connect a vacuum source to the pressure port of the sensor
to be calibrated. Evacuate the sensor to a low pressure that will still maintain a viscous
flow, typically 300 millitorr, or greater. (At pressures lower than 300 mTorr, the actual
pressure at any particular point in the system is questionable.) Allow sufficient time for
the applied pressure to stabilize and adjust the measured pressure on the zero calibration screen to match the true applied pressure. Press the ♦ (enter) key to store the zero
offset.
For a bi-directional sensor: Apply a negative pressure source equal to R-.
Operating Instructions CPG2300 Series 41
Portable Digital Pressure Gauge
CPG2300 Series
9.5.2 Span Adjustment
Access the span calibration screen as described in the Local Operation section of this
manual.
Set a known pressure to the pressure port of the sensor to be calibrated equal to, or
near, the upper end of the range of the instrument. The applied pressure must be greater than 50% of the span or span adjustments will not be accepted. Adjust the measured
pressure on the span calibration screen to match the true applied pressure. Press the ♦
(enter) key to store the span offset data.
42 Operating Instructions CPG2300 Series
Portable Digital Pressure Gauge
CPG2300 Series
Notes
Operating Instructions CPG2300 Series 43
Mensor
201 Barnes Drive
San Marcos, Texas 78666
phone: 512.396.4200
fax: 512.396.1820
web site: www.mensor.com
email: sales@mensor.com
Operating Instructions CPG2300 Series PN 0017441001M • 10/2014
WIKA Alexander Wiegand SE & Co. KG
Alexander-Wiegand-Straße 30
D-63911 Klingenberg / Germany
tel: (+49) 93 72/132-9986
web site: www.wika.de
fax: (+49) 93 72/132-8767
email: testequip@wika.de
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