BC Biomedical DPM-2250 User Manual

HIGH PRECISION

DIFFERENTIAL

DIGITAL PRESSURE METERS

DPM-2250 SERIES

USER MANUAL

BC BIOMEDICAL

DPM-2250 SERIES

TABLE OF CONTENTS

DESCRIPTION............................................................................................................. 3

OVERVIEW.................................................................................................................. 6

KEYS............................................................................................................................ 12

OPTIONS ..................................................................................................................... 13

COMMUNICATIONS.................................................................................................... 14

MANUAL REVISIONS.................................................................................................. 19

WARRANTY................................................................................................................. 19

SPECIFICATIONS ....................................................................................................... 20

NOTES......................................................................................................................... 22

1

CAUTION

FLUID SHOULD ONLY BE APPLIED TO (+) HI PORT

N O T I C E

BC GROUP INTERNATIONAL, INC. RESERVES THE RIGHT TO MAKE
CHANGES TO ITS PRODUCTS OR SPECIFICATIONS AT ANY TIME,
WITHOUT NOTICE, IN ORDER TO IMPROVE THE DESIGN OR
PERFORMANCE AND TO SUPPLY THE BEST POSSIBLE PRODUCT. THE
INFORMATION IN THIS MANUAL HAS BEEN CAREFULLY CHECKED AND
IS BELIEVED TO BE ACCURATE. HOWEVER, NO RESPONSIBILITY IS
ASSUMED FOR INACCURACIES.

CONTACT INFORMATION

BC BIOMEDICAL

BC GROUP INTERNATIONAL, INC.

PO BOX 25125

9415 GENTRY AVE

ST. LOUIS, MO 63125

USA

1-800-242-8428

314-638-3800

www.bcgroupintl.com

[e-mail]

Manual DPM-2250 Series Copyright © 2006

www.bcgroupintl.com Made in the USA

8/06 Rev 05

2

BC GROUP

DPM-2250 SERIES

DIGITAL PRESSURE METERS

The Model DPM-2250 Series is a Microprocessor based High Precision Differential Digital
Pressure Meter Family. They measure both gas and liquid pressures and provide multiple
engineering unit displays for the results. The units can have one pressure sensor with two
ports. The optional features of storage of min and max pressures and an RS232 port are
available. In addition, an optional temperature sensor input can be added to measure
pressure and temperature all in one meter. The following are highlights of some of the main
features.

DPM-2251 (Basic Features):

• LARGE GRAPHICS DISPLAY WITH CURSOR SELECTION OF
OPTIONS AND SETUP OF PARAMETERS

• 0.05% FS PRESSURE ACCURACY

• STANDARD PRESSURE SCALES INCLUDE 8 DIFFERENT

ENGINEERING UNIT RANGES
(PSI, mmHG, inHG, cmH2O, inH2O, Kpa, Bar, mBar)

• DIGITAL CALIBRATION – NO POTS TO TURN

• SELECTABLE DISPLAY OPTIONS AND DIGIT SIZES

• BATTERY LIFE DISPLAY (0 to 100%)

• PROGRAMMABLE DIGITAL FILTER

• CONTRAST IS SOFTWARE ADJUSTABLE

• 16 BIT MEASUREMENT

• DIGITAL ZERO ADJUST

• DC OUTPUT (OPTIONAL)

DPM-2252 ADDS:

• MAX and MIN PRESSURE VALUE STORAGE

• RS232 SERIAL COMMUNICATIONS

TEMPERATURE OPTION ADDS:

• YSI 700 TEMPERATURE PROBE INTERFACE

• -20.0 TO 100.0 C / -4.0 TO 120 F TEMPERATURE RANGE

• 0.5% FS ACCURACY

• MAX and MIN TEMPERATURE VALUE STORAGE

3

OPTIONAL ACCESSORIES:

BC20 - 21100 BATTERY ELIMINATOR (US Version)
BC20 - 21101 BATTERY ELIMINATOR (Euro Version)
BC20 - 21102 COMMUNICATIONS CABLE (1/8” phone to DB 9 F)
BC20 - 30106 BC BIOMEDICAL SMALL SOFT SIDED CARRYING CASE

BC20 - 01005 UNIVERSAL PRESSURE ADAPTER KIT

BC20 - 01006 YSI TEMPERATURE CABLE

AVAILABLE MODELS:

There are a number of possible configurations for the DPM-2250. The models can have
one pressure sensor with two ports and an optional temperature sensor input. There are a
variety of types of sensors available for each input. The model number calls out these
types. For details about the Pressure and Temperature Sensor Ranges, see next page.

DPM 225X XX XX XX XX

Options
DC = DC Output

Temperature Port
N = Not Applicable
Y7 = YSI 700
R1 = 100 Ω RTD

Pressure Port 2
N = Not Applicable

Pressure Port 1
N = Not Applicable
100 = Max 100 PSI
75 = Max 75 PSI
10 = Max 10 PSI
5 = Max 5 PSI
.3 = Max .3 PSI

2250 Series
2251 = Basic Model
2252 = Min/Max and
RS232 Add

Digital Pressure Meter

4

Pressure Sensor 100

Units Range

(Accuracy: .05% FS =

+/- 0.05 PSI)

PSIG -13.50 to 100.0

mmHg -701.0 to 5190

inHg -27.60 to 204.3

cmH2O -951.0 to 7043

inH2O -374.0 to 2773

KPa -93.10 to 689.5

Bar -.9310 to 6.895

mBar -9310 to 6895

Pressure Sensor 10

Units Range

(Accuracy: .05% FS =

+/- 0.0015 PSI)

PSIG -10.00 to 10.00

mmHg -519.0 to 519.0

inHg -20.43 to 20.43

cmH2O -704.3 to 704.3

inH2O -277.3 to 277.3

KPa -68.95 to 68.95

Bar -.6895 to .6895

mBar -689.5 to 689.5

Pressure Sensor .3

Units Range

(Accuracy: .05% FS =

+/- 0.00015 PSI,
+/- 0.01 cmH2O)

PSIG -.3000 to .3000

mmHg -15.57 to 15.57

inHg -.6129 to .6129

cmH2O -21.13 to 21.13

inH2O -8.319 to 8.319

KPa -2.069 to 2.069

Bar -.0207 to .0207

mBar -20.69 to 20.69

Pressure Sensor 75

Units Range

(Accuracy: .05% FS =

+/- 0.0375 PSI)

PSIG -75.00 to 75.00

mmHg -3893 to 3893

inHg -153.2 to 153.2

cmH2O -5282 to 5282

inH2O -2080 to 2080

KPa -517.1 to 517.1

Bar -5.171 to 5.171

mBar -5171 to 5171

Pressure Sensor 5

Units Range

(Accuracy: .05% FS =

+/- 0.0025 PSI)

PSIG -5.000 to 5.000

mmHg -259.5 to 259.5

inHg -10.22 to 10.22

cmH2O -352.2 to 352.2

inH2O -138.7 to 138.7

KPa -34.48 to 34.48

Bar -.3448 to .3448

mBar -344.8 to 344.8

Temperature Sensor

YSI 700

Units Range

(Accuracy: .5% FS =

+/- 0.5 C)

Degrees C -20.0 to 100.0
Degrees F -4.0 to 212.0

Temperature Sensor

100 Ω RTD

Units Range

(Accuracy: .5% FS =

+/- 0.5 C)

Degrees C -20.0 to 100.0
Degrees F -4.0 to 212.0

5

OVERVIEW

(Op

This section looks at the layout of the DPM-2250 and gives descriptions of the elements
that are present.

Pressure Port LO:
Male Luer Lock
Connector

LCD Graphical Display

Power

2.1 mm Jack
(Optional Battery
Eliminator)

Temperature:
¼” Phone
Jack

tional)

RS232:
1/8” Phone Jack
(Optional)

Pressure Port HI:
Male Luer Lock
Connector

6 Light Touch Keys for
Selecting Parameters and
Settings:
POWER for Turning Unit On
and Off
UP and DOWN Arrows for
Scrolling Through Selected
Options. When No Options
are Selected, for Changing
Display Screen
SELECT for Choosing
Setting or Parameter to
Change
SETUP/RETURN for
Entering and Exiting Setup
Menu
HOLD/RESET for Freezing
the Unit at its Current Setting
and for Clearing the Min/Max
Value in Capture Register

9V Battery
Compartment
(Back)

6

MAIN SCREENS

– There can be up to four main screens, depending on the model. They

are PRESSURE, TEMPERATURE, and COMBINED and INPUTS. The available screens

can be toggled through using .

Pressure
Display with Min/Max
Option selected

Temperature Display
with Min/Max Option
selected

Combined Screen showing:
Pressure
Temperature

Input Identification Screen
Note: Sensor limits are
displayed based on
selected range.

7

PRESSURE SCALE

– The pressure scale is indicated by the units displayed under

the reading. The scale can be changed by using to highlight the unit line and

to toggle the pressure units.

Pressure Units

PSIG

mmHg

inHg

cmH2O

inH2O

KPa

Bar

mBar

NOTE: If the measured pressure is outside of the range of the instrument, an OVER

RANGE or UNDER RANGE message box will be displayed.

Typical display with
“Over Range”
message box.

NOTE: All engineering unit conversions from PSI are calibrated for 20 degrees Celsius.

8

TEMPERATURE SCALE

– The temperature scale is indicated by the units displayed under

the reading. The scale can be changed by using to highlight the unit line and

to toggle the temperature units. The following is a breakdown of the available

temperature units and the measurement range for typical sensors:

Temperature Sensor

Units

Degrees C

Degrees F

NOTE: If the measured temperature is outside of the range of the instrument, an OVER

RANGE or UNDER RANGE message box will be displayed. If a probe is not connected,

the NO PROBE message box will be displayed.

Typical display with
“No Probe” message
box.

9

SYSTEM SETUP

– The Setup Mode allows the user to adjust the configuration of the

meter. The Setup screen can be entered using the key. The parameters can be

changed by using to highlight the line and to toggle the available

options. The Setup screen can be exited using the key. The following is a

breakdown of the parameters available in the configuration of the unit and their available

options:

System Setup Configuration

Parameter Description Range

Selects whether the Min and Max values will be

Display Min/Max

Contrast Adjust

Auto Off Timer (Min)

Battery Life

Beep Length

Digital Filter (Sec)

Software

displayed on the main screens
(except COMBINED).

Sets the contrast of the display screen.
Determines the period of inactivity before the meter

is turned OFF. A timer is started when the meter is
turned ON and is reset each time a key is pressed.
When the timer reaches the value set in this
parameter, the power is automatically turned OFF.
(NOTE: Setting this parameter to 0 disables the
Auto Off timer. When running from line power, the
meter does not automatically shut off.)
Displays current life of the battery.
At 10%, a warning screen will appear.
At 0%, the unit will power down automatically.

Sets volume for the audio beep.
Determines the number of samples that are

averaged in the digital filter. The software has a
Digital Filter that averages the readings to produce
a stable display.
(NOTE: Increasing this setting will cause a more
stable display. However, it will also cause a slower
response to small changes. The best setting is the
smallest number that provides a stable display.)

Displays current software program.

Yes/No

0-20

0-30 Minutes

0-100%

(Read Only)

0-16

0-60

(Read Only)

10

ZEROING PRESSURE SCALES

– When there are no pressure inputs connected to the

unit, the display should read “0.” It may be necessary to zero the pressure scales to

remove any errors due to ambient conditions. This is done by depressing the

key until the zeroing instructions are displayed, then depressing

simultaneously to begin the process. The “ZEROING…” message will flash while the scale

is being zeroed. When the zeroing instructions are displayed again, the process is

complete.

NOTE: Each sensor needs to be zeroed separately.

LOW BATTERY – When the battery life reaches 10 percent, the LOW BATTERY message

box will be displayed.

Typical display with
“Low Battery” message
box.

LINE POWER – A 2.1 mm jack is provided for the optional 9 VDC Battery Eliminator

(BC20 – 21100 or BC20 - 21101) that may be used for continuous run applications. It

bypasses the internal battery when plugged in.

11

KEYS

Six tactile-touch keys are provided for system operation:

– This key turns the unit off and on. The unit will return to the main screen that

was active when it was turned off.

– In the DISPLAY MODE, these keys toggle the display through the available

main screens.

In the SELECT MODE, if a parameter has been highlighted, these keys will scroll through

the available settings.

– On any screen, there are a number of parameters that may be selected and

changed. This key sequences the cursor (Highlight) through those parameters.

– This key is used to Hold (freeze) and Reset (unfreeze) any of the input displays.

Depressing this key will hold the currently displayed Pressure or Temperature reading until

reset. Each input can be held independently.

When active, the word “HOLD” is in the display. Depressing this key on a screen that is

held will reset that input and remove the word “HOLD” from the display.

NOTE: In the composite screen, the hold feature requires that the specific input be

selected using before is used.

12

– This key toggles the unit into and out of the Setup Mode. Depressing this key

will enter the Setup screen where the configuration can be viewed and adjusted.

Depressing the key again will exit the Setup Mode and return to the previously viewed main

screen. This will also save any changes to the internal EEPROM memory so they will be

retained even with the power turned off or battery removed.

OPTIONS

DC OUTPUT

match the 0 to Full pressure range of the selected sensor.

– Unit may be ordered with a 0 to 1 VDC output. This output is scaled to

13

COMMUNICATIONS

Since the meter does not handle a great deal of data, the link has been optimized to allow
the user, through very simple instructions, to control and interrogate the meter. The
following section describes the JPC Protocol used by the meter.

The JPC Protocol consists of 6 basic commands:

R - READ
W - WRITE
U - UPLOAD
Q - QUICKSEND
V - VERSION
X - CANCEL

The data format is standard ASCII and all data are BCD values.

The following is a breakdown of each of the commands and the way they are accessed.
The meter will echo all characters that are typed to it. When used with a terminal, this will
provide the appropriate display. When used with a computer system, this will provide direct
feedback of the fact that unit has accepted the data.

All commands are completed with a carriage return from the computer. All commands will
be acknowledged by a carriage return, line feed ($0D,$0A). If a command is not valid, the
meter will respond with “??”. All commands are not case sensitive.

14

READ/WRITE COMMANDS

The READ command is utilized to read from the meter any of the gathered data. The
command is entered as a letter followed by 2 numbers, followed by a carriage return:

R(Location)(Return)

The 'R' indicates to the meter that the command is to be a READ command.

The Location contains two digits that indicate the data location that is to be read.

The carriage return indicates that the command is to be activated.

The WRITE command allows the user to update the system settings. The write command
is entered as a letter followed by 7 numbers, followed by a carriage return.

W(Location)(Data) (Return)

The 'W' indicates to the meter that the command is to be a WRITE command.

The Location contains two digits that indicate the data location that is to be read.

The Data contains five digits that indicate the data that is to be written at the desired
Location.

The carriage return indicates that the command is to be activated.

15

LOCATION ACCESS DESCRIPTION RANGE

01 R

02 R/W CONTRAST 0-20

03 R/W AUTO POWER OFF 0-30

04 R MODEL

05 R

06 R/W PRESSURE UNITS

07 R/W PRESSURE FILTER 0-60

08 R PRESSURE See Note 1

09 R/W PRESSURE MAX See Note 1, 3

10 R/W PRESSURE MIN See Note 1, 3

% BATTERY LIFE

REMAINING

PRESSURE SENSOR

TYPE

0-100

0 Not Installed
1 0.3 PSI max
2 ­3 5 PSI max
4 10 PSI max
5 ­6 75 PSI max
7 100 PSI max

0 PSIG
1 mmHg
2 inHg
3 cmH
4 inH
5 kPA
6 Bar
7 mBar

O

2

O

2

17 R

18 R/W TEMPERATURE UNITS

19 R/W TEMPERATURE FILTER 0-60

20 R TEMPERATURE See Note 2

21 R/W TEMPERATURE MAX See Note 2, 3

22 R/W TEMPERATURE MIN See Note 2, 3

TEMPERATURE SENSOR

TYPE

0 Not Installed
1 YSI 700
2 RTD 100

0 = C
1 = F

Note 1 – The units for the pressure data are determined by the setting in Location 6. This
may be set via the Write command or manually using the Range Key. See Description
Page for Ranges.

Note 2 – The units for the temperature data are determined by the setting in Location 18.
This may be set via the Write command or manually using the Range Key. See Description
Page for Ranges.

Note 3 – Writing to Min/Max will reset them to the current value. Any data up to 5 digits will
trigger the reset. This is the same function as selecting the Min/Max item in the display and
pressing the key.

16

The following is an example of how the Read/Write commands are used. For display
purposes, the symbol <cR> will be used to identify a carriage return ($0D), and the symbol
<LF> will be used to identify a line feed ($0A).

Read Command Examples

Data Sent

Data Returned Meaning

R08<cR> R08<cR><LF> Echo of Command Sent

10.25 mmHg <cR><LF> 10.25 mmHg measured on Pressure Sensor 1
* End of Transmission

Write Command Examples

Data Sent

Data Returned Meaning
W064 <cR> W064<cR><LF> Echo of Command Sent
(Set Pressure Sensor units to “inH

O”)

2

W0600004<cR> W0600004<cR><LF> Echo of Command Sent
(Set Pressure Sensor units to “inH2O”)
* End of Transmission

W05100<cR> W05100<cR><LF> Echo of Command Sent
??<cR><LF> Invalid Command Response
(Location 05 is Read Only)
* End of Transmission

UPLOAD COMMAND

The Upload command allows the user to read all of the selected device data from locations
1 through 16 with a single command. The data will be transmitted as a single block with
each location separated by a carriage return, line feed ($0D,$0A).

The following is the format for this command:

U (Return)

See the table in the Read Command section for details on the data structure.

17

QUICKSEND COMMAND

Quicksend is a feature that allows the user to receive an automatic update of all of the
meter data without any user interaction. When the Quicksend feature is turned ON, the
meter will automatically send all of the device data every half second. The Quicksend
feature is toggled ON and OFF with the Quicksend command.

The following is the format for the 'Q' command:

Q (RETURN)

See the table in the Read Command section for details on the data structure.

VERSION COMMAND

The Version command allows the user to read the Software Version that the unit is running.

To read the Version, the following syntax is used:

V (RETURN)

CANCEL COMMAND

The CANCEL command is simply a way to re-establish proper control, should an error
occur or an incorrect command be transmitted. For the most part, an incorrect command
will simply be ignored and the meter will prepare for an additional command. However, a
command may be cancelled midstream by transmitting an 'X' (ASCII). This command does
not require a carriage return, nor will it acknowledge with a carriage return. However, it will
echo an 'X' to indicate that the CANCEL command has been received.

The command may also be utilized as a clear and/or acknowledgement of the meter being
on line.

18

MANUAL REVISIONS

A

A

Revision #

Program # Revisions Made

Rev 01 DT7321A Preliminary Manual

Rev 02 DT7321A Temperature Added

Rev 03 DT7321A DC Output Added

Rev 04 DT7321A Pictures Updated

Rev 05 DT7328CA Miscellaneous Edits

LIMITED WARRANTY

WARRANTY

FROM DEFECTS IN MATERIALS AND WORKMANSHIP UNDER THE SERVICE FOR WHICH THEY

RE INTENDED. THIS WARRANTY IS EFFECTIVE FOR TWELVE MONTHS FROM THE DATE OF

SHIPMENT.

EXCLUSIONS: THIS WARRANTY IS IN LIEU OF ANY OTHER WARRANTY EXPRESSED OR
IMPLIED, INCLUDING, BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE.

BC GROUP INTERNATIONAL, INC. IS NOT LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL
DAMAGES.

NO PERSON OTHER THAN AN OFFICER IS AUTHORIZED TO GIVE ANY OTHER WARRANTY OR

SSUME ANY LIABILITY.

REMEDIES: THE PURCHASER'S SOLE AND EXCLUSIVE REMEDY SHALL BE: (1) THE REPAIR OR
REPLACEMENT OF DEFECTIVE PARTS OR PRODUCTS, WITHOUT CHARGE. (2) AT THE OPTION
OF BC GROUP INTERNATIONAL, INC., THE REFUND OF THE PURCHASE PRICE.

: BC GROUP INTERNATIONAL, INC. WARRANTS ITS NEW PRODUCTS TO BE FREE

19

SPECIFICATIONS

PRESSURE SENSOR 100

-RANGE

-RESOLUTION

-ACCURACY

PRESSURE SENSOR 75

-RANGE

-RESOLUTION

-ACCURACY

PRESSURE SENSOR 10

-RANGE

-RESOLUTION

-ACCURACY

PRESSURE SENSOR 5

-RANGE

-RESOLUTION

-ACCURACY

PRESSURE SENSOR .3

-13.50 to 100.00 PSI

.01 PSI

.05% FS = +/- 0.05 PSI

-75.00 to 75.00 PSI

.01 PSI

.05% FS = +/- 0.00375 PSI

-10.00 to 10.00 PSI

.01 PSI

.05% FS = +/- 0.0015 PSI

-5.000 to 5.000 PSI

.001 PSI

.05% FS = +/- 0.0025 PSI

-RANGE

-RESOLUTION

-ACCURACY

TEMPERATURE SENSOR YSI 700

-RANGE

-RESOLUTION

-ACCURACY

TEMPERATURE SENSOR 100 RTD

-RANGE

-RESOLUTION

-ACCURACY

-.3000 to .3000 PSI

.0001 PSI

.05% FS = +/- 0.00015 PSI +/- 0.01 cmH

-20.0 to 100.0° C, -4.0 to 212.0° F

.1°C, .1°F

.5% FS = +/- 0.5°C

-20.0 to 100.0° C, -4.0 to 212.0° F

.1°C, .1°F

.5% FS = +/- 0.5°C

O

2

20

DISPLAY

SETUP MEMORY

LCD Graphical 128 X 64 Pixels

MEMORY RETENTION

OPERATING RANGE

STORAGE RANGE

CONSTRUCTION

SIZE

WEIGHT

CONNECTIONS

Power - 2.1mm Center Negative

PRESSURE MEDIA

Any pure fluid or gas that is compatible with

Pyrex, Glass, Silicon, Alumina Ceramic,
Epoxy, RTV, gold, aluminum, and nickel.

NOTE: Fluid should only be applied

POWER

LINE: 9VDC, Center Negative

POWER CONSUMPTION

BATTERY LIFE

BATTERY ELIMINATOR
(OPTIONAL)

BE2000PE (220 VAC) - Euro

DC OUTPUT
(OPTIONAL)

P:Manuals\BCGroup\…\DPM_2000\DPM2250_UM_Rev05.doc

EEPROM, All Parameters

10 Years w/o Power

15 to 30 Degrees C

-40 to 60 Degrees C

Enclosure - ABS Plastic

Face - Lexan, Back Printed

7.09 x 3.94 x 1.56 inches
180 x 100 x 40 mm

(HxWxD)

1 lbs. (0.45 kg)

<

RS232 - 1/8 inch phone

Pressure - Male Luer

Temperature - 1/4 inch phone

to (+) HI Port

BATTERY

ON: less than 12 mA

OFF: less than 40 µA

CONTINUOUS: 80 hrs.

BE2000PU (120 VAC) - US

: 9V Alkaline

OFF: 12 months

9V, 200 mA DC

0 to 1 VDC

21

NOTES

22