Bacou-Dalloz Biosystems PosiChek3 User manual

1
Troubleshooting Guide
PosiChek3
BA Test Bench
651 South Main Street
Middletown, CT 06457
[phone] [phone]
Fax [phone]
Part number 13-271 Version 1.0
08MARCH2004

2

1
The PosiChek3Computerized SCBA Test Bench has been
designed to evaluate the performance of Self Contained
Breathing Apparatus and other types of respiratory protective
equipment. In order to ensure that performance evaluations
are conducted and recorded properly, it is essential that the
instructions in this manual be read, fully understood, and
followed.
PosiChek3Troubleshooting Guide
Part Number 13-271
Version 1.0
Copyright 2004
by
Biosystems LLC, A Bacou-DallozTM Company
651 South Main Street
Middletown, Connecticut 06457
Phone: [phone] Fax: [phone]
[phone]
All rights reserved.
No page or part of this operation manual may be reproduced in any form
without written permission of the copyright owner shown above.
All rights reserved to correct typographical errors.

2
Table of Contents
1. Overview ............................................................................................ 4
2. User and data problems ................................................................... 4
2.1 Unable to remember password...................................................................4
2.2 Unable to access ..........................................................................................4
2.2.1 Test menu is “grayed out” .............................................................................................4
2.2.2 User or apparatus info is “grayed out” ...........................................................................4
2.2.3 Print menu is “grayed out” in View Apparatus screen.....................................................5
2.3 Unable to find serial number in Select Apparatus for Testing Screen ....5
3. Transducer problems ....................................................................... 5
3.1 Message: Calibration due............................................................................5
3.2 Message: Transducers out of range...........................................................6
3.3 Message: Raw count variation is out of range ..........................................8
3.4 EP Transducer is not indicated on Software or Test ................................8
4. Communication problems................................................................ 9
4.1 Resolving basic communications issues ..................................................9
4.2 Unable to establish communication between the PC and the PosiChek 9
4.2.1 Unable to Complete Initialization.................................................................................10
4.2.2 Verifying PosiChek operation without a computer........................................................ 11
4.3 Computer loses communication with PosiChek .....................................12
4.3.1 Verifying loss of communication..................................................................................12
4.3.2 Resuming communications.........................................................................................13
5. Printer problems ............................................................................. 13
5.1 Message: Printer not responding .............................................................13
5.2 Printer passthru settings...........................................................................14
5.2.1 PC – PosiChek – Printer. ...........................................................................................14
5.2.2 Independent PC – printer connections. .......................................................................14
5.2.3 Message: Printer is Busy ............................................................................................15
5.3 Message: Printer not installed (Run Time Error 484) ..............................16
5.4 Printout appears garbled...........................................................................16
5.5 Unable to print from other applications while printer is connected to
PosiChek..............................................................................................................16
5.6 All fields are blank in printed test report..................................................17
6. Specific test problems.................................................................... 17
6.1 Unable to pass facepiece leak test ...........................................................17
6.1.1 Leaks in the system .................................................................................................... 17
6.1.2 The computer has lost communication with the PosiChek. .......................................... 17
6.2 Pressure is too low to continue testing ...................................................18
6.3 Last test date is not being updated ..........................................................18
6.4 Unable to save test results to a floppy disk.............................................18
6.5 Unable to pass Maximum Rate Breathing Test........................................18
6.5.1 Facepiece pressure too low ........................................................................................ 18
6.5.2 Facepiece pressure too high.......................................................................................19
6.5.3 Medium pressure is failing .......................................................................................... 19
6.5.4 Spikes in Breathing Graph .......................................................................................... 19
6.5.4 Incorrect Manifold Size ...............................................................................................20

3
7. Software problems.......................................................................... 21
7.1 Message: “FLASH program may be old or faulty” ..................................21
7.2 Message: “Disk I/O Error During Read (Run-time error 3040)”..............21
7.3 Message: “Database is Read-Only”.......................................................... 22
7.3.1 Opening a database in read-only mode.......................................................................22
7.4 Message: Cannot Open File (Run-time error 3051) .................................23
7.5 Symptom: Software can only be run by an administrator ......................23
8. Specific Instructions....................................................................... 25
8.1 Disabling the Background Printer Monitor ..............................................25
8.2 Entering Dates ............................................................................................26
8.3 Entering Numbers ......................................................................................26
9. Contacting Biosystems .................................................................. 27
9.1 Returning the PosiChek to Biosystems ...................................................27
9.2 Calibration details ......................................................................................28
9.3 Calibration requirements...........................................................................28
9.4 Screen Shots ..............................................................................................28
9.5 PosiChek Warranty Details........................................................................29

4
1. Overview
This manual is designed to help users
who are experiencing problems with the
PosiChek software and hardware.
This manual assumes a basic
knowledge of BA, PC and PosiChek
operations. Please consult the
PosiChek reference manual for detailed
directions on basic procedures.
Note: If you are having a problem
connecting your BA to the PosiChek,
you probably need special adapters
that are available through the BA
manufacturer.
If you are unable to solve the problem
through the use of this manual, please
call the Biosystems Service Department
at [phone] or [phone].
Please use a telephone that is located
near the PosiChek and the PC.
2. User and data problems
2.1 Unable to remember
password
If you are unable to remember your
password, there are two other ways to
log into the system.
At first launch of the software, the
system contains a single active user, the
setup technician, whose password is
“setup”. This is discussed at length in
section 2.7 of the PosiChek Reference
Manual. Logging in with the password
“setup” will normally give the user full
system rights, so the user will be able to
access and modify user and apparatus
data as needed. The “setup technician”
may also be able to create new users.
If the setup technician has been
removed from the user list, or if the
setup technician’s system rights have
been modified, and you are unable to
log on with another valid password,
please contact the Biosystems Service
Department at [phone] for help.
The Service Technician may be able to
suggest another password to log you on
to the system.
2.2 Unable to access
When a menu item is “grayed out”, it is
inaccessible. Menu items may be
“grayed out” for a number of reasons.
2.2.1 Test menu is “grayed out”
If the all of the test functions on the
menu except the Cylinder Test are
grayed out, you are probably running
PosiChek software “offline”. Initialize
the PosiChek as discussed in section
3.1.1 of the PosiChek Reference
Manual to conduct tests.
The test menu will also be “grayed out”
if the database that is currently open is
configured as “read-only”. In this case,
change the configuration of the
database so that is can accept test
results, then re-attempt testing.
Note: The Sample32.mdb database
that is included with the PosiChek3
software is “read only”. Test menu
options will be “grayed out” in the
Sample32.mdb database.
2.2.2 User or apparatus info is
“grayed out”
If you are logged into the system and
are unable to modify the user list,
apparatus list or test results, then you
probably do not have adequate system
rights for the Posichek software.
PosiChek system rights are discussed in
detail in section 5.2.1 of the PosiChek
Reference Manual. It may be necessary
for the system administrator, or
someone with a higher level of system
rights, to log into the system and change
your system access settings.'

5
Some apparatus menu items will be
“grayed out” if the database that is
currently open is set to “read-only. In
this case, change the configuration of
the database so that is can accept test
results, then re-attempt testing.
Apparatus information will always be
“grayed out” in OEM versions of the
PosiChek software. All apparatus
information in OEM software versions is
pre-programmed to meet the
manufacturer’s specifications. In the
unlikely event that you need to make
modifications to apparatus information in
OEM software versions, contact the BA
manufacturer.
2.2.3 Print menu is “grayed out”
in View Apparatus screen
Whenever a database is opened, the
software asks if you would like to view
the apparatus that are due for testing. If
you click Yes, the apparatus due for
testing will be shown, but the Print Menu
will be grayed out.
To print only the list of apparatus that
are due for testing, click on the “Done”
button. When the software returns to
the main screen, select “View
Apparatus”. Then click on the “Actions”
button (lower left) and select “Show
Only apparatus…”. From ”Show Only…
” select “Due Before”. The software will
prompt you for the date. Enter today’s
date and click OK. The list of apparatus
due for testing within one month will
then be shown. To print the list, click on
the “Actions” button followed by “Print”.
2.3 Unable to find serial
number in Select
Apparatus for Testing
Screen
If a serial number cannot be located,
perform the following steps:
1. Click cancel and check for alternate
spellings of the model name and re-
execute the search. To locate the
apparatus, the spelling of the model
name entered for the search must
exactly match the spelling of the
model name in the apparatus types
database.
2. Use the View / Apparatus menu
choice to access the entire
apparatus list. Once the serial
number is located, you will be able to
view the apparatus type (model) as it
appears in the database for the
apparatus. If the apparatus type
(model) is misspelled, correct the
apparatus type (model) information
as discussed in section 6.2.10 of the
PosiChek Reference Manual.
3. Transducer problems
3.1 Message: Calibration due
The PosiChek remembers the
calibration due date of each of the
internal transducers and will display the
“Calibration Due” message when
appropriate.
In order to ensure accurate test results,
the PosiChek’s internal transducer
assembly must be calibrated annually.
Since calibration requires specialized
test equipment, the procedure is
typically done at the factory.
PosiCheks located in North America
must be returned to the Biosystems
Factory in Middletown, CT, USA
annually for calibration. Contact
Biosystems for a Return
Authorization Number (RA#) prior to
returning the PosiChek.
[phone] or [phone]
The PosiChek software is designed to
automatically inform you of the

6
calibration status of the internal
transducer assembly.
Testing done with a
PosiChek that is overdue for
calibration may provide inaccurate
test results.
If more than a year has gone by since
the last calibration, the software will
display a message for each transducer
that is due for calibration. Under normal
circumstances, all transducers will be
due for calibration on the same date.
The following message will be shown at
software start-up if the PosiChek
recognizes that transducers are due for
calibration.
Press “OK” to acknowledge the warning
and turn off the calibration due
message. The PosiChek will operate
normally once the warning message is
acknowledged. The calibration due
message will be shown whenever the
PosiChek is turned on or initialized until
the test bench is successfully calibrated.
Note: The calibration status of the
transducer assembly is automatically
logged by the PosiChek software
during tests. Any data acquired from
tests that are performed after the
calibration due reminder has been
acknowledged will indicate the
overdue status of the transducers.
3.2 Message: Transducers out
of range
The “Transducers out of range”
message can indicate a number of
problems. Perform the following
instructions in order to rule out the
simpler and more likely causes before
performing more complex procedures.
1. Remove the facepiece and all
manifolds from the PosiChek. Then
try to initialize the PosiChek again.
See Section 3.1.1 of the PosiChek
Reference Manual for the
initialization procedure. If this fails to
correct the problem, proceed to step
2.
2. When the software prompts you
stating that a transducer count is out
of range, click no each time the
message appears in order to
determine which transducers are out
of range. If only the Low Pressure
and Activation Pressure transducers
are out of range, it may indicate that
the tube that connects the head to
the bellows is crimped. Remove the
head and check the tube. Then
carefully replace the head and
reinitialize the PosiChek. See
Section 3.1.1 of the PosiChek
Reference Manual for the
initialization procedure. If this fails to
correct the problem, proceed to step
3.
3. From the main menu bar select
Setup / Transducers / Diagnostics
and verify that all transducers are
reading close to zero and moving
slightly.
↓

7
If any of the transducers reads a
number that is not close to zero, click
OK, and then choose the menu item
Setup / Transducers / Zero
Calibration to zero the transducers.
Make sure that the facepiece has
been removed from the PosiChek
test head prior to zeroing the
transducers.
↓
↓
Note: A transducer stability test will
automatically be performed following
the transducer zero calibration.
Once the zero calibration has been
completed, click OK and return to the
diagnostics screen.
If each of the transducers now reads
a number that is close to zero, click
OK and return to testing. If the
problem persists, continue to step 4.
4. From the Setup / Transducers /
Diagnostics screen, click on the
Actions button followed by “Show
Details” to view the raw counts of
each transducer.

8
If the raw count of any transducer is
0 or 4095, this may indicate that data
from the transducer is not being
transmitted to the circuit board of the
PosiChek. A reading of 4095 may
also indicate that the pressure on the
transducer is above the maximum
allowable pressure. To rule out data
transmission problems due to bad
connections, first disconnect the
PosiChek from the power source,
PC and printer. Then remove the
left side panel and gently push each
electrical connector into its socket.
Once this is done, reassemble the
PosiChek. Then reconnect it to the
electrical socket and the PC, reboot
the program and check the
transducer counts again. If the
problem persists, continue to step 5.
If realigning the electrical
connections results in a change in
the transducer counts in the
Diagnostics screen, click OK, and
then zero calibrate the transducers
as discussed above in step 3.
5. If the transducer counts remain at 0
or 4095, it may indicate a physical
wiring problem. Contact Biosystems
for further instructions.
3.3 Message: Raw count
variation is out of range
If the message “Raw count variation is
out of range” is displayed during
initialization or during a zero calibration,
it is an indication that the PosiChek has
failed the transducer stability test. The
transducer stability test can fail for a
number of reasons including minor
changes in pressure on the transducers.
1. Remove the facepiece, manifolds
and anything else attached to the
PosiChek or the test head. Then
reinitialize the PosiChek (see section
3.1.1 of the PosiChek Reference
Manual). If the message reappears,
proceed to step 2.
2. From the main menu choose Setup /
Transducers / Zero Calibration to
make sure the transducers are
zeroed correctly. If the error
message returns, perform the zero
calibration a second time. If the
message is displayed a third time,
there may be a hardware issue
involved. Call Biosystems for
details.
3.4 EP Transducer is not
indicated on Software or
Test
The Enhanced Precision logo is only
displayed when all of the following
conditions are met:
1. The PosiChek is equipped with an
Enhanced Precision transducer.
2. The EP transducer has been
calibrated within the previous year by
Biosystems with the appropriate
calibration instruments.
PosiCheks located in North America
must be returned to the Biosystems
Factory in Middletown, CT, USA
annually for calibration. Contact

9
Biosystems for a Return
Authorization Number (RA#) prior to
returning the PosiChek.
4. Communication problems
If communication problems arise
between the PosiChek and the PC, see
section 4.1 to rule out simple solutions
prior to moving on to other sections.
4.1 Resolving basic
communications issues
The following basic steps should be
taken when the PosiChek is not
communicating with the PC during the
initialization sequence.
1. Make sure the PosiChek is plugged
in to a wall outlet and is turned on.
2. If the PosiChek is already turned on,
then turn it off and turn it back on.
(This will reset the printer passthru, if
it is turned on.)
3. Make sure the parallel port cable is
firmly plugged in between the
parallel port on the computer and the
PosiChek.
4. Click OK several times on the
Initialization screen to make sure you
have attempted to establish
communication through all available
parallel ports.
If communications have still not been
reestablished, proceed to section 4.2.
4.2 Unable to establish
communication between
the PC and the PosiChek
1. Turn off the PosiChek and unplug
the computer interface cable. Wait
at least 5 seconds, then reconnect
the interface cable and turn the
PosiChek back on. Follow the
initialization procedure as discussed
in section 3.1.1 of the PosiChek
Reference Manual. If this fails to
establish the connection, proceed to
step 2.
2. Verify that the parallel port is
correctly set up. In Windows 98,
2000, XP you can check this by
double clicking the Settings icon and
then accessing the Control Panel.
From the Control Panel select
System and then click on the Device
Manager tab. Click the + to the left
of "Printer Port" to view all printer
ports. Verify that the LPT port does
not have a red X or question mark by
it. If the port appears to be
functioning properly, proceed to step
3.
3. Check that the parallel port and
cable are working correctly by
plugging the parallel port cable into a
printer instead of the PosiChek, and
printing a test page on the printer. In
order to make sure the parallel port
cable is working correctly, make sure
you use the same cable you are
trying to use to connect the
PosiChek. If the cable is defective,
install a new printer cable (IEEE
1284 DB25 Male/Centronics 36
Male).
4. If this is the initial setup of the
PosiChek, you may need to change
the mode of the parallel port in your
BIOS settings. If the software is
unable to communicate with the
PosiChek, it reports the parallel port
mode during the initialization process
at the bottom of the screen.

10
Note: In the picture above, LPT3
is configured in ECP Bi-
Directional mode.
If the mode given is anything other
than ECP or Standard SPP,
changing the mode may allow
communication to be established.
To access BIOS settings, refer to
your PC’s operating instructions to
change your parallel port mode. The
preferred parallel port mode for the
PosiChek is “ECP”. If “ECP” fails to
work, select an Output Only mode,
which may appear as “Normal”,
“SPP”, “Standard”, “Unidirectional” or
“Output Only”. If the PC’s parallel
port is operating in any of these
modes and the PC is still unable to
communicate with the PosiChek,
proceed to step 5.
5. If you’ve completed steps 1-4 above
and you are still unable to establish
communications with the PosiChek,
call Biosystems.
4.2.1 Unable to Complete
Initialization
After establishing communication with
the PosiChek, the computer goes
through an initialization process. During
this process, the flash version in the
PosiChek is checked for errors, the lung
is centered, the calibration values are
read, and the transducers are zeroed
and checked for stability. Occasionally,
problems are encountered during the
initialization sequence that prevent the
initialization from being completed. In
general, it is a good idea to call
Biosystems for help with these
problems. The most common reasons
for initialization failure are listed below.
•Too many errors when loading the
flash (see below)
•Unable to center the lung (see
below)
•Errors in calibration values (see
below)
•Transducers due for calibration (see
section 3.1 above.
•Transducers out of range (see
section 3.2 above)
•Raw count variation out of range
(see section 3.2, proceed to step 3)
Too many errors when loading the
flash
This error tends to occur when a new
version of the flash has been partially
loaded. Always complete the loading of
the flash before moving on to other
projects. Try to reload the flash first,
then call Biosystems for further help with
this problem.
Unable to center the lung
There are several reasons why the
PosiChek may be unable to center the
lung.
1. Attempting initialization with a sealed
facepiece on the PosiChek’s head.
If this occurs, the software will
recognize the vacuum created when
the lung moves and will stop the lung
before damage occurs. Remove the
facepiece or break the seal. Then

11
turn the PosiChek off and back on,
and repeat the initialization process.
2. Breathing stopped when the lung
was at the exact top or bottom of the
breathing cycle, which can cause the
PosiChek to have difficulty restarting
the bellows. To verify, first
disconnect the PosiChek from the
power source and the PC. Then
remove the side panel of the
PosiChek.
If the lung is centered, the aluminum
part of the arm that attaches the
motor to the lung should be parallel
to the floor (horizontal). If the lung is
at the top or bottom of the cycle, the
arm will be touching one of the limit
switches, which look like wires.
Before proceeding further, examine
the motor arm to make sure all
screws are securely fastened, and
the arm is securely attached to the
motor and lung.
If the lung appears to be at the top or
bottom of the cycle and will not
move, manually force the lung back
toward the center. The lung does
not need to be exactly centered.
Once the bellows has been moved
towards the center, replace the side
panel. Then plug the PosiChek back
in and reconnect the PosiChek to the
PC. Turn the PosiChek back on and
select Run Tests. The lung should
center during the initialization
process.
If this fails to correct the problem, or
if this is a recurring problem, the
PosiChek may need to be repaired.
Call Biosystems for further
information.
Errors in calibration values
Calibration values are required for the
PosiChek to be able to breathe or read
pressures. The calibration values are
important, so 2 copies of them are kept
in the PosiChek.
Occasionally, one copy will become
corrupted, and the software will inform
you that it is replacing this copy with the
other one. Although this is unusual, it
should not be a cause for alarm.
Occasionally, both copies of the
calibration values are lost. The only
solution for this is to send the PosiChek
back to Biosystems for recalibration.
4.2.2 Verifying PosiChek
operation without a
computer
To verify operation of the PosiChek
without a computer, use this procedure:
1. Disconnect the PosiChek from the
power source, PC and printer.
Turn the PosiChek so that the power
switch and manifold connector are at
the right, and remove the left side
panel.

12
2. Near the top left corner of the PC
board are four sets of tiny headers
with three pins each. One of them is
labeled JMP11 and has a blue
connector on the two leftmost pins.
Move the connector so that it is on
the two rightmost pins.
The final step in this
procedure involves powering up the
PosiChek while leaving the side
cover off. Do not touch any of the
internal workings of the PosiChek
while it is plugged in.
3. Plug the PosiChek in and turn it back
on.
If the bellows centers and starts to
breath, disconnect the PosiChek
from the electrical outlet and
reassemble it. You have just
established that your PosiChek is
functional, which means that it is not
communicating with the PC.
Proceed to section 4.3 below for a
discussion of communication
problems.
If the bellows doesn’t move, check
that all four green LEDs on the right
side of the board are lit. If they are
not lit, one of the power supplies is
malfunctioning. If they are lit, this
may indicate a hardware problem. In
either case, call Biosystems for
further instructions.
4.3 Computer loses
communication with
PosiChek
If the PosiChek loses communication
with the PC, perform the following steps:
1. At the alert window, click OK to
resume testing. If this fails proceed
to step 2.
2. Reinitialize the connection as
discussed in section 3.1.1 of the
PosiChek Reference Manual.
3. Both the PosiChek and the PC
should be plugged into a surge
protector and properly grounded.
Power surges can trigger the loss of
communication between the PC and
the PosiChek.
4. If this problem occurs frequently and
the entire system is properly
grounded, it may be the printer
cable. Replace it. (IEEE 1284 DB25
Male/Centronics 36 Male).
Note: Biosystems recommends that
the PosiChek be plugged into a surge
protector. Failure to use a surge
protector may lead to sporadic
communication problems between
the PosiChek and the PC.
If the communication problem persists,
call Biosystems for additional
information.
4.3.1 Verifying loss of
communication
Upon loss of communication, transducer
readings may become erratic or
incorrect and the PosiChek lung may fail
to move. To determine if the
transducers are being read correctly,
select the menu item Setup /
Transducers / Diagnostics
Click on the “Actions” button followed by
“Show Details”.

13
The display will show a box for each
transducer labeled Raw Counts. The
values in these boxes should change by
1 or 2 counts every few seconds. If
none of these values change, your
computer may have lost communication
with the PosiChek.
4.3.2 Resuming communications
Once you’ve determined that
communications have been lost,
perform the following procedure to
resume communications.
1. Vent or remove the facepiece.
2. Use the menu item Setup / Initialize
PosiChek to reestablish
communications. You must turn off
the PosiChek and turn it back on
during this step. Initialization is
discussed in greater detail in section
3.1.1 of the PosiChek Reference
Manual.
5. Printer problems
5.1 Message: Printer not
responding
The PosiChek software is the only
application that knows how to turn on
the printer passthru in the PosiChek.
Other applications (such as Microsoft
Word) do not know how to turn it on. In
order to allow you to print from these
applications, whenever the PosiChek
software is exited, the printer passthru is
turned on permanently. As long as the
PosiChek is left on, other applications
can print through it. In order to
communicate with the PosiChek again,
you must turn the PosiChek off and
back on.
If the “Printer not responding” message
is shown, perform the following steps:
1. Click on Cancel to end the attempt to
print. Check the printer port and
printer cable connections. Then try
again. If you still get the “Printer not
responding” message, proceed to
step 2.
2. If the printer was working last time
you tried it and a second printer
cable is available, change the printer
cable. If this fails to correct the
problem, proceed to step 3.
3. Change the printing timeout value by
choosing Setup from the main menu
followed by Options / General.
Click on the Printing tab. The
following screen will then be shown.

14
If you are printing through the
parallel port on the PosiChek,
increase the printer timeout value
(i.e. if it is set at 30 seconds, change
it to 40 seconds). The maximum
value allowed is 60 seconds. This
will increase the amount of time the
printer passthru inside the PosiChek
is turned on while printing.
See section 5.2.1 below for more details
on the Printer Timeout Interval.
5.2 Printer passthru settings
There are two basic configurations for
using a printer with the PosiChek.
5.2.1 PC – PosiChek – Printer.
In this configuration, the printer is
connected to the PosiChek, which is
connected to the PC. This means that
all print jobs must pass through the
PosiChek on their way to the printer.
When a printout is done through the
PosiChek, a printer passthru inside the
PosiChek is turned on. The computer
cannot communicate with the PosiChek
while the passthru is turned on. The
PosiChek "watches" the parallel port to
see if additional information is being
passed through. When a certain
amount of time passes, the PosiChek
assumes the printout is finished and
turns the passthru off. It will then accept
commands from the computer again.
The amount of time the PosiChek will
wait before turning off the passthru is
called the Printer Timeout Interval. If
needed, this can be adjusted in the
Setup - Options - General menu item as
discussed in section 5.1 above.
If you attempt to perform an action that
requires communication with the
PosiChek while the printer passthru is
on, you will get a message informing
you that the printer is busy.
Occasionally, the software will have
trouble determining that the printer
passthru has been turned off, and you
will get this message in error.
See section 5.2.3 below for more
detailed instructions on the “Printer is
Busy” message.
5.2.2 Independent PC – printer
connections.
In this configuration, the printer is not
connected to the PC through the
PosiChek. This includes cases where a
network printer is used, or the printer is
attached directly to the computer via a
second parallel port or some other type
of connection.
In this case, the printer passthru should
NOT be turned on. A Printer Timeout
Interval of 1 second is used to indicate

15
that the printer passthru should not be
used. If the passthru is turned on, you
will get the Printer Busy message
repeatedly.
Use the Setup - Options - General menu
item to set the Printer Timeout Interval
to 1 second. See section 5.1 above for
more detailed instructions.
5.2.3 Message: Printer is Busy
This message appears when the
software thinks the printer passthru in
the PosiChek is turned on, and you
attempt an action that requires
communication with the PosiChek.
The PosiChek software is the only
application that knows how to turn on
the printer passthru in the PosiChek.
Other applications (such as Microsoft
Word) do not know how to turn it on. In
order to allow you to print from these
applications, whenever the PosiChek
software is exited, the printer passthru is
turned on permanently. As long as the
PosiChek is left on, other applications
can print through it. In order to
communicate with the PosiChek again,
you must turn the PosiChek off and
back on.
The following steps may be used to
clear this message.
Wait a few seconds and try to print
again. After three attempts, a cancel
button will appear on the message. If
the printout still hasn’t begun, click the
cancel button. (If something is being
printed, this will cause unrecognizable
characters to appear on the printout.)
It may take two attempts to cancel the
printer busy message.
If the message will not clear after
repeated attempts, go to Setup -
Initialize PosiChek and reestablish
communication with the PosiChek. See
section 3.1.1 of the PosiChek Reference
Manual for details.
If the error message is preventing you
from accessing the “Initialize PosiChek”
menu command, turn the PosiChek off
and then back on again. When the
PosiChek goes into “boot mode” you will
be able to bypass the message and
initialize the instrument.
To prevent this message from appearing
in the future you may want to go to
Setup - Options - General, and change
the Printer Timeout Interval.
If the printer is NOT attached to the
PosiChek, change the Printer Timeout
Interval to 1 second. This indicates to
the software that the printer passthru
should not be used.
If the printer is attached to the
PosiChek, make the Printer Timeout
Interval a little shorter. However, if the
Printer Timeout Interval is too short, the
passthru may be turned off in the middle
of the print, which would cause the
computer to lose communication with
the printer and part of the printout will be
lost.

16
5.3 Message: Printer not
installed (Run Time Error
484)
This error occurs if you attempt to run
the PosiChek software without a printer
installed on your PC. The PosiChek
software requires a printer to be
installed, even if you do not intend to
print anything.
To check if a printer is installed, open
the Control Panel and double-click the
Printers icon. (On Windows 98 you can
open the printers icon from the Start
menu.)
You will see a list of the installed
printers.
To install a printer, double-click the Add
Printer button in the Printers window. If
you have not purchased your printer yet,
you can install any printer for the time
being. Just remember to delete this
printer later after you have installed the
one you actually intend to use.
5.4 Printout appears garbled
A garbled printout usually indicates that
the printer’s resolution setting is too low.
In Windows 98, 2000, XP, go to the
Control Panel / Settings / Printers and
look at the properties of the printer you
are using. If possible, increase the
printer’s resolution. Screen resolution is
much lower than print resolution. A
minimum setting of 150 dots per inch
(dpi) is recommended.
5.5 Unable to print from other
applications while printer
is connected to PosiChek
The PosiChek software is the only
application that knows how to turn on
the printer passthru in the PosiChek.
Other applications (such as Microsoft
Word) do not know how to turn it on. In
order to allow you to print from these
applications, whenever the PosiChek
software is exited, the printer passthru is
turned on permanently. As long as the
PosiChek is left on, other applications
can print through it. In order to
communicate with the PosiChek again,
you must turn the PosiChek off and
back on.
The PosiChek software uses the parallel
port to communicate with the PosiChek
hardware while it is running. Other
applications will not be able to print
through the parallel port while the
PosiChek software is running and in
communication with the hardware.
To correct this problem, first try exiting
the PosiChek software and then try to
print again. Be sure to leave the
PosiChek running. When you exit the
PosiChek software, the hardware is left
in a mode where it will pass all data
through to the printer that is attached to
the PosiChek.
Note: If your printer is connected
through the PosiChek to your PC, the
PosiChek must be turned on for print
commands from the PC to reach the
printer.
Note: If the PosiChek software is
installed on a desktop-style PC, it is
strongly suggested that a second
parallel port be installed and that the
printer timeout be set to 1 second.
If you have turned the PosiChek off, you
must turn it back on, restart the
software, establish communication with
the PosiChek, and exit the software
normally without turning off the
PosiChek hardware to print through the
PosiChek.

17
5.6 All fields are blank in
printed test report
If all fields appear blank in a printed
report, it may be due to a blank record
that has somehow been saved into the
database. To eliminate any blank
records from the database, use the View
/ Test Results command and the View
Test Data command to locate the blank
apparatus and/or blank tests and delete
them.
See section 6.2.1 of the PosiChek
reference manual for details on deleting
a record from the database.
6. Specific test problems
6.1 Unable to pass facepiece
leak test
Failure to pass the facepiece leak test is
usually caused by either a leak in the
system or a loss of communications
between the PC and the PosiChek.
6.1.1 Leaks in the system
A leak in the system may be located in
the BA, in the interface between the
PosiChek and the BA, or in the
PosiChek itself. Begin by ruling out the
obvious parts of the BA, then move on
to the connection fittings as follows:
The most common reason for failure to
pass the facepiece test is that the
facepiece is not correctly sealed on the
test head. The facepiece may be either
too loose or too tight. Even a small leak
in the facepiece seal can cause the
failure of the facepiece leak test. Try
resetting the head onto the PosiChek
and then retest.
Once the facepiece has been reset, and
you are reasonably sure that it has been
eliminated as the source of the failure,
check the bypass valve in the facepiece.
If it is open, close it and retest.
Once the bypass valve has been ruled
out, make sure that the cylinder valve is
closed. An open cylinder valve will not
allow the PosiChek to induce the
vacuum necessary to pass the
facepiece test. If the cylinder valve is
found to be open, close it and retest.
Once the cylinder valve is ruled out,
check all of the other fittings on the BA.
If any are open (for instance the
threaded CGA fitting used to connect
the Apparatus with the cylinder), close
them and retest.
If you are performing the Complete
SCBA Test, make sure that the
appropriate high or low pressure
manifold is connected from the BA to
the PosiChek.
If the facepiece still fails the test after
the potential leaks above have been
ruled out, then it is time to consider that
the facepiece itself may be defective. If
possible, install a new facepiece and
retest. If the second facepiece passes
the leak test, it’s a good indication that
the first facepiece was defective. If both
facepieces fail, then the problem may
involve leakage around the test head
gasket. Remove the test head, make
sure the gasket and head seating
surfaces are clean and dry, and reinstall
the test head as discussed in Section
2.6.1 of the PosiChek Reference
Manual.
6.1.2 The computer has lost
communication with the
PosiChek.
In this case you may notice that the
facepiece pressure remains at a
constant value of -6.9" H2O. Before
testing, make sure the PosiChek is still
in communication with the software.
See Section 4 above on communication
losses.

18
6.2 Pressure is too low to
continue testing
When the system is re-pressurized, the
PosiChek will continue to display the
“pressurize manifold screen” for a short
time while the pressure settles. If the
pressure settles below the required
amount, the message will remain and
you will need to repressurize the
system.
If you’ve already re-pressurized the
system, and the message persists, it
may be caused by apparatus
information that was entered incorrectly.
First check to see if you are testing a
low pressure (2216 PSI) apparatus. If
you are, then it is possible that the
Apparatus Type information is incorrect.
Choose the menu item Setup /
Apparatus Types / View Apparatus
Types and choose the Apparatus
Information tab. If the apparatus
information lists high pressure
(4500PSI), and the BA is low pressure
(2216PSI), then the low pressure BA
doesn’t have enough pressure even
while fully charged to meet the minimum
pressure requirement for testing a high
pressure SCBA. Tests on high pressure
SCBA require a minimum of 3200 PSI.
If this is the case, click on the “Actions”
button and select “change”. Then
change the high pressure setting to low
pressure and click “OK”.
6.3 Last test date is not being
updated
If the test due date or last test date is
not being updated, it is most likely
because the required tests have either
not been performed, or because the
apparatus has failed one of the required
tests. For an in-depth discussion of the
conditions under which the test due date
is updated, see section 3.12 of the
PosiChek Reference Manual.
To make changes to the list of required
tests for the Complete SCBA Test and
Airline Apparatus Test see section
5.3.2.1.1 of the PosiChek Reference
Manual.
6.4 Unable to save test results
to a floppy disk
Note: Due to the fragile nature of
floppy disks, Biosystems
recommends saving all test data to
the PC’s hard drive and then
exporting test results to back-up
media such as floppy disks, zip disks
and CDs.
If you are unable to save test data (or to
export test data) to a floppy disk, first
check that the write protection tab on
the disk is in the unlocked position. If
this still fails to correct the problem, use
the Windows Explorer to examine the
size of the test results database. A
standard floppy disk can hold about 1.4
megabytes of information. If the data
exceeds the available space on the disk,
then you will be unable to save the data
to that disk.
6.5 Unable to pass Maximum
Rate Breathing Test
Examine the breathing graph to
determine exactly what is failing and
proceed to the appropriate subsection
below.
6.5.1 Facepiece pressure too low
In this section, the symptom will be in
bold, with the solution following.
Symptom: Facepiece pressure falls
just below the lower limit on the
graph.
Adjust the static facepiece pressure by
readjusting the facepiece. If the unit has