Forma Scientific 3920 User manual

Forma Scientific, Inc.
P.O. Box 649
Marietta, Ohio 45750
U.S.A.
Telephone: [phone]
Telefax: [phone]
Model: 3920
29 CU. ft. Capacity
Reach-In Incubator
Manual No. 7033920 Rev. 1
Read This Instruction Manual
Failure to read, understand and follow the instructions in this manual may result in damage
to the unit, injury to operating personnel and poor equipment performance.
Caution: All internal adjustments and maintenance must be performed
by qualifiedservicepersonnel.
Refer to the serial tag on the
rear cover
of this manual

Forma Scientific, Inc.
CAUTION
Contains Parts and Assemblies
Susceptible to Damage by
Electrostatic Discharge (ESD) ..J
•
The material in this manual is for information purposes only. The contents and the product it
describes are subject to change without notice. Forma Scientific, Inc. makes no representations or
warranties with respect to this manual.
In no event shall Forma Scientific, Inc. be held liable for
any damages, direct or incidental, arising out
of or related to the use of this manual.
.MANUAL NO. 7033920 I
1 IN-2309 9112/97
New temp and RH sensor
heg
nla 6/12/97 Revise Manual 7033920, for job 26610
deg
REV ECN
DATE DESCRIPTION
11

Forma Scientific, Inc. ________________________ Safety
General Safety Notes used in this Manual
Important operating and/or mainJenance instructions. Read the accompanying text
carefully.
Ce symbole attire I'attention de I'utilisateursurdes instructions importantes de
fonctionnement et/ou d'entretien.
II peut etre utilise seul ou avec d'autres symboles de
securite. Lire attentivement
Ie texte d'accompagnement.
Wichtige 8etriebs-- und/oderWartungshinweise. Lesen Sie den nachfolgenden
Text
sorgfaltig.
Importante instruccions de operacion y/o mantenimiento. Lea el texto acompanante
cuidadosamente.
Potential electrical hazards. Only qualified persons should perform procedures
associated
with this symbol.
Ce symbole attire I'attention de I'utilisateur sur des risques electriques potentiels.
Seules des personnes qualifiees doivent appliquer les instructions et les procedures
associees it ce symbole.
Gefahr von Stromschlagen. Nurqualifizierte Personen sollten die Tatigkeiten
ausflihren, die mit diesem Symbol bezeichnet sind.
Potencial
de riesgos electricos. Solo personas das capacitadadas deben ejecutar los
procedimientos asociadas con este simbulo.
111

-----------------------------------------------------
Forma Scientific, Inc. Safety
Equipment being maintained or serviced must be turned off and locked off to
prevent possible injury.
Risques potentiels lies aI'energie. L'equipement
en entretien ou en maintenance doit
Atre eteint et mis sous cle pour eviter des blessures possibles.
GenUe, an denen Wartungs- oder Servicearbeiten durchgefClhrt werden, mussen
abgeschaltet und abgeschlossen werden, urn Verletzungen zu vermeiden.
EI equipo recibiendo servicio 0 mantenimiento debe ser apagado ysegurado para
prevenir danos.
Hot surface(s) present which may cause burns to unprotected skin or to materials
which may be damaged by elevated temperatures
Presence
de surface(s) chaude(s) pouvant causerdes brOlures sur la peau non
protegee. ou sur des matieres pouvant atre endommagees pardes temperatures
elevees.
HeiBe
OberfJ~che(n) konnen ungeschutzter Haut Verbrennungen zufUgen oder
Schaden an Materialien verursachen. die nicht
hitzebest~ndig sind.
Superficias calientes que pueden causar quemaduras a piel sin proteccion 0 a
materiales que pueden estar danados por elevadas temperaturas.
...J Always use the proper protective equipment (clothing, gloves, goggles etc.).
...J Always dissipate extreme cold or heat and wear protective clothing.
...J Always follow good hygiene practices.
...J Each individual is responsible for his or her own safety.
IV

---------------------------------------------------
Fonna Scientific, Inc. Service
Do You Need Information or Assistance on Forma Scientific
Products?
If you do, please contact us 8:00 a.m. to 7:00 p.m. (Eastern lime) at:
1-740-373-4763 Direct
1-800-848-3080
Toll Free, U.S. and Canada
1-740-373-4189
FAX
http://www.forma.com Internet Worldwde Web Home Page
Forma's Sales Group can provide information on pricing and give you quotations. We
can take your order and provide delivery information on major equipment items ormake
arrangements to have your local sales representative contact you. Our products are listed
on the
Internet
and we can be contacted through our Internet home page.
The Forma
Product Service Group can supply technical information about proper setup,
operation or troubleshooting
of your equipment. We can fill your needs for spare orreplacement
parts or provide you with on-site service.
We can also provide you with a quotation on our
Extended Maintenance Program for your Forma products.
Whatever Forma products you need or use, we will be happy to discuss your applications.
If you are experiencing technical problems, working together, we will help you locate the
problem and, chances are, correct ityourself
... over the telephone without a service call.
When more extensive service is necessary, we will assist you with the selection ofa field
service organization for on-the-spot repairs
by a professional field technician. If your service
need is covered
by the Forma warranty, we will arrange for the unit to be repaired at ourexpense
and to your satisfaction.
Regardless
of your needs, Forma's professional telephone technicians are available to
assist you Monday through Friday from 8:00 a.m. to 7:00 p.m. Eastern Time. Please contact us
by telephone or fax. Ifyou wish to write, our mailing address is:
Forma Scientific, Inc.
POBox 649
Marietta, OH 45750
International customers please contact your local Forma Scientific distributor.
V1

Forma Scientific, Inc. . Service
~------------------------------------------
Table of Contents
SECTION 1 - RECEIVING
1.1 Preliminary Inspection................................................................................ 1-1
1.2 Visible Loss or Damage............................................................................. 1-1
1.3 Responsibility for Shipping Damage........................................................... 1-1
SECTION 2 - INSTALLATION AND START-UP
2. 1 Location ..................................................................................................... 2-1
2.2 Attaching the Drain Lines ............................................. ~ ............................. 2-1
2.3 RS-232 Output Interface and Remote Alarm Connector..............................2-2
2.4 Power Connection .....................................................................................2-2
2.5 Start-Up Procedure....................................................................................
2-3
2.6 Setting the Overtemp Safety Thermostat.................................................... 2-3
2.7 Setting the Undertemp Safety Thermostat...................................................2-4
2.8 Preparing the optional Cobex Recorder.....................................................2-4
a. Changing the Chart Paper and the Pen...................................................2-5
b. Changing the Pen ..................................................................................2-5
c. Calibrating the chart recorder................................................................2-5
2.9 Controller Configuration............................................................................2-6
Temperature Configuration........................................................................2-7
SECTION 3 - CONTROL PANEL OPERATION
3.1 The 3920 Control Panel........................................................................... 3-1
• Main Power Switch and Indicator Light ................................................... 3-1
• Refrigeration Switch and IndicatorLight.................................................. 3-1
• Defrost Switch and Indicator Light...........................................................3-2
7

Forma Scientific, Inc.---"" _____________________ Service
• Overtemp Safety Control, Indicator Light and Audible Alarm .................3-2
• Undertemp Safety Control, Indicator Light and Audible Alarm ...............3-2
3.2 Setting the Incubator's Operating Temperature ......................................
3-3
3.3 Programming the Controller ....................................................................3-3
• Removing the mechanicallockout.............................................................3-4
• Removing the Software Lockout.................................................................3-4
SECTION 4 - ROUTINE MAINTENANCE
4.1 Cleaning the Incubator.............................................................................4-1
SECTION 5 - SERVICE
5.1 Access to Electrical Components.............................................................5-1
5.2 Replacing the OvertemplUndertemp Probe and Thermostat...................5-1
5.3 Replacing the Temperature Sensor..........................................................5-2
5.4 Removing the Top Section.......................................................................5-4
5.5 Setting the Door Heater Control .............................................................5-5
SECTION 6 - SPECIFICATIONS
SECTION 7 - SPARE PARTS LISTS
SECTION 8 - SCHEMATICS
SECTION 9 - WARRANTYINFORMATION AND SUPPLEMENTS
8

-----------------------------------------------
Fonna Scientific, Inc. Service
SECTION 1 - RECEIVING
1.1 Preliminary Inspection
This item was thoroughly inspected and carefully packed prior to shipment and all
necessary precautions were taken to ensure safe arrival of the merchandise at its
destination. Immediately upon receipt, before the unit is moved from the receiving area,
carefully examine the shipment for loss or damage. Unpack the shipment and inspect
both interior and exterior for any in-transit damage.
1.2 Visible Loss or Damage
If any loss or damage is discovered, note any discrepancies on the delivery receipt.
Failure to adequately describe such evidence
of loss or damage may result in the carrier
refusing to honor a damage claim. Immediately call the delivering carrier and request that
their representative perform an inspection. Do not discard any
of the packing material
and under no circumstances move the shipment from the receiving area.
1.3 Responsibility for Shipping Damage
For products shipped F.O.B. Marietta, Ohio, the responsibility of Forma Scientific,
Inc. ends when the merchandise is loaded onto the carrier's vehicle.
On F.O.B. Destination shipments, Forma Scientific's and the carrier's responsibility
ends when your Receiving Department personnel sign a free and clear delivery receipt.
Whenever .possible, Forma Scientific, Inc.
will assist in settling claims for loss or in-
transit damage.
1-1

Forma Scientific, Inc. _________________ ---'Installation and Start-Up
SECTION 2 - INSTALLATION AND START-UP
2.1 Location
Locate the unit on a finn, level surface in an area of minimum ambient temperature
fluctuation. A minimum
of 12 inches clearance is required at the top of the incubator and
a minimum
of 3 inches clearance is required at the rear of the incubator to facilitate
adequate air flow around
the refrigeration system.
2.2 Attaching the Drain Connections
The cabinet's 3/8" MPT drain line connection is located on the rear (lower left side) of the
cabinet. A P-trap (Figure 2-1) is included with the unit and must be installed on the
connection. To install the drain connection:
1. Using Teflon pipe thread tape, tape the threads on the cabinet drain connection.
2. Using an open end adjustable wrench, install th.e P;..trap onto the connection. Make
sure that the trap is positioned down.
Push a piece
of 3/8" ID tubing onto the trap and direct the tubing to a convenient drain.
Install a hose clamp on the tubing,
if desired.
To cabinet drain
~§
Figure 2-1
Cabinet drain p-trap
2-1

Fonna Scientific, Inc.----'. ________________ ---'Installation and Start-Up
2.3 RS-232 Output Interface and Remote Alarm Connector
The Model 3920 is equipped with an RS-232 Serial Communication Interface for the
remote transmission
of temperature data. The remote alann connections are also included on the
terminal strip.
Terminal Strip Connections
I,...r-
~
II-- ------1
IJZ)
E!
It--- ------1
I~
~
0
r---
1
r---
0
0
-2
-0
0
-3
-0
0
-4
-0
0
-5
-0
0
r----
6
r----
0
0 0
-8
-0
0
-9
-0
7
0
I
-i
::c
»
z
(J)
s::
-i
::0
m
()
m
<
m
()
0
s::
s::
0
z I I
()
0
s::
s::
0
z
z
0 z
()
I
Temperature
RS232
Remote Alarm
(Shown
in alarm)
Figure 2-2
Terminal Pin Descriptions, RS-232 (1-6) and Remote Alarm Connections (7-9)
IMPORTANTUSER INFORMATION
Caution! Stored product should be
protected by
an activated alarm system
capable
of initiating a timely response
24 hours/day. Forma Alarms provide
interconnect for centralized monitoring.
b. Remote Alarm Contacts
Remote alann connections are also included on the terminal strip (Figure 2-2) providing
Nonnally Open (N.O.) and Nonnally Closed (N.C.) contacts. C is the Common terminal. The
remote alann will activate when either the incubator's temperature
or humidity go out of the set
alann limits.
2-2

Forma Scientific, Inc.---" ________________ --.:Installation and Start-Up
2.4 Power Connection
The electrical junction box is located on the rear top section of the incubator. With
thejunction box switch OFF, connect the incubator
to an adequate power source. See
the electrical data plate mounted on the unit
or the electrical schematics in the back of
this manual.
2.5 Start-Up Procedure
Preset the controls as follows:
Overtemp Safety Thermostat......................... (Fully Clockwise)
Undertemp Safety Thermostat....................... (Fully Counterclockwise)
Main Power Switch.......................................ON
Temperature Controller.................................Desired Setpoint
Door Heater.................................................40% (factory set)
Turn the main power switch
on. The Power indicator and Heat indicator will light.
Turn the Refrigeration switch on and the indicator will light.
The compressor and refrigeration lights will not come on if
the chambertemperature is within ±4°e of the temperature
controller.
2.6 Setting the Overtemp Safety Thermostat
Allow the chamber temperature to stabilize then set the overtemp safety thermostat as
follows:
1. Turn the overtemp control knob slowly counterclockwise until the audible alarm
sounds and the overtemp indicator lights.
2. Turn the overtemp control knob clockwise approximately two units on the scale. The
alarm should be silenced and the overtemp indicator light should go out.
The overtemp safety thermostat is now set a few degrees above the control
temperature setpoint. When the chamber temperature rises to the overtemp control point,
the alarm system will activate, power
to the heaters will shut off, and the chamber
temperature will be maintained at the overtemp control point.
2-3

Forma Scientific, Inc. _________________ --.:lnstallation and Start-Up
When
an overtemp condition occurs, the cause must be determined and corrected
before normal operation under
the main temperature controller can be resumed.
Note: When the chamber temperature control setpoint is changed, the overtemp
safety thermostat must be reset to accommodate the change.
2.7 Setting the U ndertemp Safety Thermostat
Allow the chamber temperature to stabilize then set the undertemp safety thermostat
as follows:
1. Turn the undertemp control knob slowly clockwise until the audible alarm sounds
and the undertemp indicator lights.
2. Turn the undertemp control knob counterclockwise approximately two units on the
scale. The alarm should be silenced and the undertemp indicator light should go out.
The undertemp safety thermostat
is now set a few degrees below the control
temperature setpoint. When the chamber temperature drops to the undertemp control
point, the alarm system will activate, power to the compressor will shut off, and the
chamber temperature will be maintained at the undertemp control point.
When an undertemp condition occurs, the cause must be determined and corrected
before normal operation under the main temperature controller can be resumed.
Note: When the chamber temperature control setpoint
is changed, the undertemp
safety thermostat must be reset to accommodate the change.
2-4

Forma Scientific, Inc.---''-- _______________ ---.:Installation and Start-Up
2.8 Preparing the (optional) CoBex Recorder
a. Installing the battery
The seven-day circular chart
recorder is located on the front
of
the incubator cabinet and is
protected by a glass door.
To prepare the recorder for
operation, open the glass door and
snap the connector onto the 9-volt
battery as shown in Figure 2-3.
If
the unit is operating, the green
LED lights steady.
If the unit is
not turned on, the LED blinks.
slotted screws
(loosen
only)----------,
press to
change
chart
time line
groove
Figure 2-3
If the battery is weak or not connected, the green LED will flash. If power is lost to the
cabinet, the LED will also flash. When replacing the 9-volt battery, use only an alkaline style
battery. Dispose
of the old battery following established environmental practices.
b. Changing the Chart Paper
• Press the Change Chart button (#3) and hold it for 1 second until the pen begins to move
to the left of the chart. See Figure 2-3.
• Remove the existing chart by unscrewing
the center knob securing it.
• Install the new chart, positioning it so that the correct time line coincides with the time
line groove on the chart plate.
• Replace the center knob and screw it tightly against the chart.
2-5

Forma Scientific, Inc. __________________ .Installation and Start-Up
c. Changing the Pen
• Using a small flat blade screwdriver, loosen the 2 screws
holding
the pen arm and remove the pen and arm as an
assembly.
• Unsnap the plastic hinge securing the pen. Remove and
~
discard the old pen. o
• Install the new pen by snapping the hinge securely around
the pen arm
..
Figure 2-4
• Re-install the pen assembly by sliding the pen arm under the screws, positioning
the pen
tip in the time line groove. Tighten the screws.
• Push the Chart Change button and hold it for 1 second until the pen begins
to move back
onto the chart.
Note: Make sure that the pen is marking on the chart.
It may be necessary to
gently lift the pen onto the chart paper.
d. Calibrating the chart recorder
• Place an accurate thermometer(s) in the chamber next to the recorder's probe(s). After about
three minutes, compare thethermometer with the chart recorder.
For 2 pen operations, also
compare the second thermometer.
Note:
For 2 pen operations, first select the pen you wish to calibrate. Hold down the'
#1 arrow for the red (#1) pen or the #2 arrow for the blue (#2) pen, until the
light goes out. Refer
to Figure 2-4. Then adjust as necessary.
If an adjustment is necessary, press either the #1 or #2 button to move the pen left or
right. The button must be held about five seconds before the pen begins to move. Release the
button when the pen matches the thermometer.
2-6

Forma Scientific, Inc. _________________ ---Clnstallation and Start-Up
2.9 Controller Configuration
The controller has been pre-configured at the factory. Reference copies of the
Configuration records are included
on the following pages.
The controller should not be re-configured withoutfirst
consulting Forma Scientific, Inc., Service Department at
1-800-848-3080.
2-7

Forma Scientific, Inc.~. _____________ ----'Installation and Start-Up
Temperature Configuration
2-8