NAPCO 8100-TD User manual

Installation/Service Manual
TEST CHAMBER
Model 8100-TD
Precision
170 Marcel Drive
Winchester, VA
USA
Phone: [phone]
Toll Free: 800-621-8820
FAX: [phone]
Manual P/N 34000716
Rev. D Dated 23AUG99
MODEL 8100-TD TEST CHAMBER
E SERIES
POWER
ON
VALVE
30
CONDENSATE
DRAIN
40 20
OFF
HOURS
TIME
50 10
TEMP
LO
AUTOCLAVE TEMP
HI
5
43
LO
1
2
DRYER TEMP
DRYER
MED
ON
HI
OFF
DRYERME

NOTICE
THE MATERIAL IN THIS MANUAL IS FOR INFORMATION PURPOSES ONLY. THE
CONTENTS AND THE PRODUCT IT DESCRIBES ARE SUBJECT TO CHANGE WITHOUT
NOTICE. NAPCO MAKES NO REPRESENTATIONS OR WARRANTIES WITH RESPECT
TOTHISMANUAL.INNOEVENTSHALLNAPCOBELIABLEFORANYDAMAGES,DIRECT
OR INCIDENTAL, ARISING OUT OF OR RELATED TO THE USE OF THIS MANUAL.
For repair information or replacement parts assistance from the manufacturer,
call Customer Service using our toll free telephone number.
800-621-8820
540-869-9892
(FAX) 540-869-0130

INDEX DATE
REVISION STATUS
Initial releaseA
AMENDED PAGES NOTES
D 8/99 All Update part no's. and combined
service manual (3400745) with
user manual

Contents
Introduction ...................................................................................................................... 1
Unpacking and Damage................................................................................................... 1
Initial Procedure After Unpacking..................................................................................... 2
Explanation of Controls and Their Operation ................................................................... 2
Loading The Test Chamber.............................................................................................. 3
Procedure for Operation of Test Chamber ....................................................................... 3
Procedure for Operation of Dryer Cycle ........................................................................... 4
Maintenance Suggestions................................................................................................ 4
Sterilizing Cycle Data ....................................................................................................... 5
Explanation of System Operation..................................................................................... 6
Troubleshooting Procedures ............................................................................................ 7
Service and Testing Procedures....................................................................................... 9
Assembly Drawings.......................................................................................................... 16
Replacements Parts List .................................................................................................. 18
Wiring Diagram ................................................................................................................ 20
Warranty........................................................................................................................... 21

1
INTRODUCTION
Your satisfaction and safety are important to
PRECISION anda complete understandingofthis
unit is necessary to attain these objectives.
As the ultimate user of this apparatus, you
have the responsibility to understand its proper
function and operational characteristics. This
instruction manual should be thoroughly read and
all operators given adequate training before
attemptingto place thisunitin service. Awareness
of the stated cautions and warnings, and
compliance with recommended operating
parameters — together with maintenance
requirements—are important for safe and
satisfactory operation. The unit should be used
for its intended application; alterations or
modifications will void the warranty.
WARNING
AS A ROUTINE LABORATORY PRECAUTION,
ALWAYS WEAR SAFETY GLASSES WHEN
WORKING WITH THIS APPARATUS.
This product is not intended, nor can it be
used, as a sterile or patient connected device. In
addition, this apparatus is not designed for use in
ClassI,II,orIII locations as definedby the National
Electrical Code.
UNPACKING AND DAMAGE
This product was carefully packed and
thoroughly inspected before leaving our factory.
Save all packing material if apparatus is received
damaged.
Responsibilityfor safe deliverywasassumed
by the carrier upon acceptance of the shipment;
therefore, claims for loss or damage sustained in
transit must be made upon the carrier by the
recipient as follows:
Visible Loss or Damage: Note any external
evidence of loss or damage on the freight bill or
expressreceipt, and haveitsigned by thecarrier's
agent.Failuretoadequatelydescribesuchexternal
evidence of loss or damage may result in the
carrier's refusing to honor your claim. The form
required to file such claim will be supplied by the
carrier.
Concealed Loss or Damage: Concealed
loss or damage is any loss or damage which does
not become apparent until the merchandise has
been unpacked and inspected. Should either
occur, make a written request for inspection by
carrier's agent within 15 days of the delivery date;
then file a claim with the carrier.
If you follow the above instructions carefully,
Precision will guarantee our full support of your
claim to be compensated for loss or damage in
transit.
DO NOT — for any reason — return this unit
to PRECISION without first obtaining return
authorization. In any correspondence with
PRECISION please supply the nameplate data,
including catalog number and serial number.

2
EXPLANATION OF CONTROLS AND
THEIR OPERATION
1) Power ON-OFF switch: Applies power to unit.
2) Dryer function switch: In the "ON" position,
the drying function is enabled and test
chamber function is disabled. In the "OFF"
position,thedryingfunctionsdisabledandtest
chamber function enabled.
3) Timer: Manuallysettable, 60 hourmaximum,
must be turned past 5 hours before setting
desired time. (Optional 120 hour timer
available.) Timer enables and controls both
the test chamber and drying time. Timer in
timed-out position de-energizes a solenoid
valvereleasingpressurefromchamber(when
intestchamber operation) and willalsosound
an alarm indicating end of cycle. Power ON-
OFF switch will disable alarm.
4) Test chamber temperature control: Controls
temperature/pressure when in test chamber
operation. Low position corresponds to
approximately 121°C and 15 P.S.I.. High
positioncorresponds to approximately132°C
and 27 P.S.I..
5) Dryer temperature control: Controls
temperaturewhendrying function isselected.
Low position corresponds to approximately
40°C.
6) Condensate valve and drain: Used to drain
excess water from condensation tank after
every test chamber cycle.
INITIAL PROCEDURE AFTER
UNPACKING UNIT
WARNING
FOR PERSONAL SAFETY, THIS APPARATUS
MUST BE PROPERLY GROUNDED.
Electrical Connections
The 8100-120 Autoclave is equipped with a
three-pronged (grounded) plug power cord. This
mates with a three-prong receptacle to minimize
the possibility of electric shock. The user should
have the wall receptacle and circuit checked by a
qualified electrician to make sure the receptacle
is properly grounded.
Where a two-prong wall receptacle is
encountered, it is the personal responsibility and
obligation of the user to have it replaced with a
properlygroundedthree-prongwallreceptacle. Do
not, under any circumstances, cut or remove
the third (ground) prong from the power cord.
Do not use a two-prong adapter plug.
Determine the total amount of current being
used by other apparatus connected to the circuit
that will be used for this apparatus. It is critical
that the added current demand (see nameplate)
of this and other equipment used on the same
circuit does not exceed the rating of the fuse or
circuit breaker.
CAUTION
BE SURE THAT THE POWER SUPPLY IS OF
THE SAME VOLTAGE AS SPECIFIED ON THE
NAMEPLATE.

3
LOADING THE TEST CHAMBER
STEP 1
Pour water into chamber reservoir. A measuring
cup is supplied. Fill until water level reaches the
level indicator on the shelf.
NOTE:
WATER LEVEL MUST REACH LEVEL
INDICATOR BEFORESTART OFEACHCYCLE.
STEP 2
Load chamber with devices to be tested. Ar-
range devices so water will not be trapped
between them or in indentations on devices.
This will help facilitate drying.
STEP 3
After loading the test chamber, close door,
replace yoke and tighten securely.
PROCEDURE FOR OPERATION OF
TEST CHAMBER
STEP 1
Set test chamber temperature control to position
3 at the center of dial. This position will set the
test chamber temperature at about 127° C.
(260°F.). When the temperature is achieved,
the thermometer pointer will be positioned in the
red area.
If a test chamber temperature (other than the
temperature set above) is desired, the following
information will be helpful for setting the test
chamber temperature.
The numbers on the test chamber
temperature control correspond to higher
temperature settings. The point reference low on
thedialface correspond to atemperatureof121°C
(250°F). Numbers between the reference
correspondto temperatures withintherange. The
range is indicated by a red area on the
thermometer face. To operate the test chamber
within the range, turn control knob to the high
position and watch the
thermometer pointer.
When the pointer
indicates a desired
test chamber
temmperature, turn
the control knob
clockwise until the
temperature indicator
light just goes out. The
indicator light will then cycle on and off as the
temperature is controlled at set point.
STEP 2
Ensure that the power switch and dryer switch
are at "OFF" position.
STEP 3
Set the timer to desired test chamber time.
Then set the power switch to the "ON" position.
(The chamber will immediately begin to heat and
will purge cold air from inside the chamber for
approximately 10 minutes. At this time the
temperature will be 95°C to 100°C. Purging will
stop and chamber will rise to desired operating
temperature and pressure. Temperature and
pressure will be maintained until end of timed
cycle.)
AUTOCLAVE TEMP
2
4
HI
5
3
LO
1
121˚C
132˚C
T
E
M
P
E
R A
T
U
R
E
R
A
N
G
E

4
STEP 4
At the end of set time interval an alarm will
sound. The alarm will continue to sound until
the power switch is set to "OFF" position. The
test chamber will automatically vent and stop
heating. Allow the chamber temperature to
decrease to at least 100°C (212°F) before
opening the door. Open the door and leave ajar.
STEP 5
Before the next cycle "drain condensate".
Condensate should be drained after each cycle.
The chamber reservoir should be refilled to
water level indicator.
PROCEDURE FOR OPERATION OF
DRYER CYCLE
To operate the dryer cycle: leave door slightly
ajar, set the dryer switch to "ON" position, set
the dryer temperature control to "LOW" position,
set the timer to desired drying time interval, set
the power switch to "ON" position. At the end of
the set time interval, an alarm will sound. The
alarm will continue to sound until the power
switch is set to "OFF" position. The dryer
temperature control also has a medium and high
setting, select a higher temperature if desired
but use caution to avoid overheating contents.
MAINTENANCE SUGGESTIONS
1) At the end of one or two test chamber
cycles: Remove screw fastener which holds
shelf in place. Remove shelf to gain access
to water reservoir. Add mild detergent to
water and scrub reservoir and rinse cham-
ber thoroughly with clear water. Replace
shelf as above.
2) Oil "T" handle threads twice a year or as
often as needed.

5
ITEM TO BE
STERILIZED
STERILIZING
TEMP.
C°
STERILIZING
TEMP.
F° PRESSURE
TIME REQUIRED
TO STERILIZE
(IN MINUTES AT
AT STERILIZING TEMP)
INSTRUMENTS 121°
132°
250°
270°
15
27
20
3 TO 6
COTTON 121°
132°
250°
270°
15
27
30
15
RUBBER 121°
132°
250°
270°
15
27
30
15
250cc FLASK (Thin Glass)
125cc FLASK (Thin Glass)
50cc FLASK (Thin Glass)
2 OZ. Comm. Bottle
121°/123°
121°/123°
121°/123°
121°/123°
250°/254°
250°/254°
250°/254°
250°/254°
-
-
-
-
8-10
8-10
6-8
8-10
LIQUIDS (MEDIUM) 121°/123° 250°/254° 15 15
NOTE: Sterilizing time will vary with the quanitity of items in the Autoclave vessel. Use a steam
clox sterilization indicator with each load.
The data shown above is based on operation of the unit at or near seal level. Because the boiling
point of water varies with altitude the cycle time required for sterilization will also vary.
Useful information for Autoclave use other than microcircuit device testing. You may want to manu-
ally time the Autoclave cycle in the following applications, due to the short time intervals involved.
MODEL 8100-TD
STERILIZING CYCLE DATA

6
EXPLANATION OF SYSTEM OPERATION
With the water level established, door tightened,
Power Switch 'ON', Dryer switch to Dryer 'OFF',
(Autoclave 'ON'), and Timer selection made, the
autoclave will begin heating. Illuminated indicator
lights will verigy that heating and timing circuits
are operational.
During the first stage of vessel heating (approx.
10 minutes from ambient) cold air will be purged
from the vessel so that uniform heat is attained
before pressurization of the vessel. A normally
opensolenoidvalve allows this purgingactionuntil
the steam temperaute in the purge line reaches
3°C above the boiling point of water.
The Sensor (temperture-sensitive switch) located
inthepurgelineisfactorysetat103°C. Thesensor
switch is normally oopen until heated to 103°C, at
whichtimethisswitch closes, energizinga latching
relay. Thje latched relay energizes the solenoid
valve,closing the purgeline. Therelaywill remain
latched until the Timer runs out or until power is
removed. If there is a power interuption, the relay
will unlatch, the solenoid valve will open; steam
will enter the purge line, the Sensor switch will
sensethesteamtemperatureand close, the realay
will latch and the solenoid valve will close. This
take s approximately 6 seconds.
Theautoclave Temperature Control isapressure-
sensitiveswitchwithasensitivity of lessthan 2 PSI.
When the desired autoclave temperature is
reachedm, the normally closed Temperature
Control Switch will open; according to the
relationship that exists between temperature and
steam pressure. The element will stop heating
andthetemperature indication lightwill extinguish.
Thetemperauterandpressure will drop,the switch
willclose andthe element willbegin to heatagain.
This cyclic action will continue until the Timer runs
out. Them temperauter indicatiing light will verify
the operation of the Temperature Control Switch.
Theautoclave is providedwithtwo safety devices,
a low water cut-off switch and a pressure relief
valve.
The low water cut-off switch will be activated if the
unit is allowed to run out of wate, caused by not
filling vessel to water indicator at the beginning of
each cycle or due to purge system failure in which
water is boiled out of the system. The normally
closed contacts, on this snap-action thermostat
switch,willopenwhenitsensesandoutsidevessel
temperature of 132°C and will close again at
110°C. It opens the circuit to the heating element.
Thetimer willcontinue to operateand will shutthe
unit off when the set time has elapsed.
The Pressure Relief Valve is located in the
condensertankassembly. Itisasafeguardagainst
temperature control failure in which case the
autoclave heating element would overheat the
vessel giving a corresponding increase in
pressure. Thepressurerelief valve will openwhen
the vessel pressure reaches 35 PSI ± 3 PSI,
venting steam into the condensor tank. If not is
around to notice the malfunction, the relief valve
will vent pressure form the vessel until the water
is boiled out. The low water cut-off switch will then
shutofftheheatingcircuit as previouslydescribed.
The condensor tank collects purged water and
condensedsteam. Itshouldbe drained afterevery
cycle with the drain valve and drain hose fitting
located onthe control panel.
The 8100-TD is equipped with a drying element.
NOTE: The dryer should be used with the door
ajar. It is operated by turning the Power Switch
'ON', Dryer Switch to 'Dryer ON' position setting
the timer and selecting the desired drying
temperatureinthedryerTemperatuerControl. The
Dryer Temperature Control is an infinite control
which varies the cyclic on-off rate of current being
supplied to the dryer heating elemetn and thus
controllingthe temperature insidethevessel. This
control is variable from Low position to High
position. Low corresponds to approx. 50°C,
medium is approx. 90°C and high corresponds to
approx.150°C. These measurements weretaken
with a thermocouple mounted in a 14 pin plastic
dip integrated circuit, positioned in the center of
the S.S.T. Tray supplied with the unit. The door
was opened 1/4" from vessel during test.