Thermo Electron 3911 Betriebsanleitung

Models 3911 and 3913

Environmental Chamber

11 cu. ft. capacity

Operating and Maintenance Manual

Manual No: 7013911 Rev. 18

Model 3911/3913 ___________________________________________________________________________

Read This Instruction Manual.

Failure to read, understand and follow the instructions in

this manual may result in damage to the unit, injury to operat-

ing personnel, and poor equipment performance.

CAUTION! All internal adjustments and maintenance must

be performed by qualified service personnel.

Refer to the serial tag on the back of this manual.

The material in this manual is for information purposes only.

The contents and the product it describes are subject to change

without notice. Thermo Electron makes no representations or

warranties with respect to this manual. In no event shall Thermo

Electron be held liable for any damages, direct or incidental, aris-

ing out of or related to the use of this manual.

MANUAL NUMBER 7013911

18 21505/SI-9018 9/18/03 New drier (P/N 209016), no flare connections ccs

17 21010/IN-3038 3/6/03 Factory pre-programmed configurations for Watlow 982 ccs

-- 21172/IN-3067 1/30/03 Reduced electrical noise (electrical schematics) ccs

16 21173/IN3057 11/15/02 Added ground shields to temperature and humidity probes ccs

-- 20479/IN-3013 10/7/02 Added 1900140 IR CO2option as an accessory aks

15 20474/IN-3013 3/7/02 Added heatless dryer option 1900139 aks

14 20342/PIP-012 10/3/01 Revised electrical schematics aks

13 19942 6/11/01 Replaced timer 275030 with 410038 aks

12 19935 5/8/01 Updated 3940-71 drawing aks

11 IN-2858 03/12/01 Revised control panel access and revised electrical schematics aks

10 19616 10/18/00 Revised door heater control , schematics aks

REV ECR/ECN DATE DESCRIPTION By

Model 3911/3913 ________________________________________________________________________________Safety

Important operating and/or maintenance instructions. Read the accompanying text carefully.

Ce symbole attire l'attention de l'utilisateur sur des instructions importantes de fonctionnement et/ou d'entretien. Il

peut être utilisé seul ou avec d'autres symboles de sécurité. Lire attentivement le texte d'accompagnement.

Wichtige Betriebs- und/oder Wartungshinweise. Lesen Sie den nachfolgenden Text sorgfältig.

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 l'attention de l'utilisateur sur des risques électriques potentiels. Seules des personnes qualifiées

doivent appliquer les instructions et les procédures associées à ce symbole.

Gefahr von Stromschlägen. Nur qualifizierte Personen sollten die Tätigkeiten ausführen, die mit diesem Symbol beze-

ichnet sind.

Potencial de riesgos electricos. Solo personas das capacitadadas deben ejecutar los procedimientos asociadas con este

simbulo.

Equipment being maintained or serviced must be turned off and locked off to prevent possible injury.

Risques potentiels liés à l'énergie. L'équipement en entretien ou en maintenance doit être éteint et mis sous clé pour

éviter des blessures possibles.

Geräte, an denen Wartungs- oder Servicearbeiten durchgeführt werden, müssen abgeschaltet und abgeschlossen wer-

den, um Verletzungen zu vermeiden.

El equipo recibiendo servicio o mantenimiento debe ser apagado y segurado para prevenir danos.

Hot surface(s) present which may cause burns to unprotected skin, or to materials which may be damaged by elevated

temperatures.

Présence de surface(s) chaude(s) pouvant causer des brûlures sur la peau non protégée, ou sur des matières pouvant

être endommagées par des températures élevées.

Heiße Oberfläche(n) können ungeschützter Haut Verbrennungen zufügen oder Schäden an Materialien verursachen,

die nicht hitzebeständig sind.

Superficias calientes que pueden causar quemaduras a piel sin proteccion o a materiales que pueden estar danados

por elevadas temperaturas.

√ Always use the proper protective equipment (clothing, gloves, goggles, etc.)

√ Always dissipate extreme cold or heat and wear protective clothing.

√ Always follow good hygiene practices.

√ Each individual is responsible for his or her own safety.

Model 3911/3913 ________________________________________________________________________________Service

iii

Table of Contents

Section 1 - Receiving . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 1

1.1 Preliminary Inspection . . . . . . . . . . . . . . . . . . . . . . . .2 - 1

1.2 Visible Loss or Damage . . . . . . . . . . . . . . . . . . . . . . .2 - 1

1.3 Responsibility for Shipping Damage . . . . . . . . . . . . .2 - 1

Section 2 - Installation and Set-Up . . . . . . . . . . . . . . . . .2 - 1

2.1 Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 1

2.2 Water (Humidity System) and Drain Connections . . .2 - 1

a. Connecting Water Inlet for Humidity System . . . .2 - 1

b. Alternate Water Supply for Humidity System . . . .2 - 2

c. Connecting the Drain Line . . . . . . . . . . . . . . . . . . .2 - 2

2.3 Remote Data Output . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 2

a. RS-232 Data Output . . . . . . . . . . . . . . . . . . . . . . . .2 - 2

b. Remote Alarm Contacts . . . . . . . . . . . . . . . . . . . . .2 - 2

2.4 Power Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 2

2.5 Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 3

2.6 Setting the Overtemp Safety Thermostat . . . . . . . . . .2 - 3

2.7 Setting the Undertemp Safety Thermostat . . . . . . . . .2 - 3

2.8 Preparing the (Optional) CoBex Recorder . . . . . . . .2 - 3

a. Installing the Battery . . . . . . . . . . . . . . . . . . . . . . .2 - 3

b. Changing the Chart Paper . . . . . . . . . . . . . . . . . . .2 - 4

c. Changing the Pen . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 4

2.9 Honeywell Recorder (optional) . . . . . . . . . . . . . . . . .2 - 4

2.10 1900140 IR CO2Option . . . . . . . . . . . . . . . . . . . . . .2 - 4

a. Connecting the CO2Source . . . . . . . . . . . . . . . . . .2 - 4

b. Setting the CO2Content . . . . . . . . . . . . . . . . . . . .2 - 5

c. CO2Control and Indicators . . . . . . . . . . . . . . . . . . .2 - 5

Section 3 - Start Up and Operation . . . . . . . . . . . . . . . .3 - 1

3.1 The Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 1

3.2 Setting the Operating Temperature . . . . . . . . . . . . . . .3 - 2

3.3 Setting the Operating Humidity . . . . . . . . . . . . . . . . .3 - 2

3.4 Air Exchange Ventilator Caps . . . . . . . . . . . . . . . . . . .3 - 2

3.5 Heatless Dryer (Optional) . . . . . . . . . . . . . . . . . . . . . .3 - 2

Section 4 - Routine Maintenance . . . . . . . . . . . . . . . . . .4 - 1

4.1 Cleaning the Incubator . . . . . . . . . . . . . . . . . . . . . . . .4 - 1

a. Maintaining the Humidity Generator . . . . . . . . . . .4 - 1

Section 5 - Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 - 1

5.1 Accessing the Electrical Components . . . . . . . . . . . . .5 - 1

5.2 Replacing Overtemp/Undertemp Probe & Thermostat5 - 1

5.3 Replacing the Humidity/Temperature Sensor . . . . . . .5 - 1

5.4 Programming the Humidity/Temp Controllers . . . . . .5 - 1

a. Removing the Mechanical Lockout . . . . . . . . . . . .5 - 1

b. Removing the Software Lockout . . . . . . . . . . . . . .5 - 2

c. Controller Configuration . . . . . . . . . . . . . . . . . . . .5 - 2

d. Offset Calibration . . . . . . . . . . . . . . . . . . . . . . . . .5 - 2

5.5 Replacing the Optional Recorder and Probe(s) . . . . .5 - 3

a. Calibrating the Chart Recorder . . . . . . . . . . . . . . . .5 - 4

5.6 Setting the Door Heater Control . . . . . . . . . . . . . . . . .5 - 4

5.7 Cleaning/Adjusting the Humidity Steam Generator . .5 - 4

a. Checking the Safety Thermostat Calibration . . . . .5 - 5

5.8 CO2Controller Calibration . . . . . . . . . . . . . . . . . . . . .5 - 5

Section 6 - Specifications . . . . . . . . . . . . . . . . . . . . . . . . .6 - 1

Section 7 - Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . .7 - 1

Refrigeration Schematics

Electrical Schematics

Warranty Information

Model 3911/3913 _____________________________________________________________________________ Contents

Model 3911/3913 ____________________________________________________________________Installation and Set-Up

Section 2 - Installation and Set-Up

2.1 Location

Locate the unit on a firm, level surface in an area of mini-

mum ambient temperature fluctuation. A minimum of twelve

(12) inches of clearance is required at the top of the incubator

and a minimum of three (3) inches of clearance is required at

the rear of the incubator. This space is necessary to allow ade-

quate air flow around the refrigeration system.

2.2 Water (Humidity System) and Drain Connections

a. Connecting Water Inlet for Humidity System

Do not attempt to operate the humidity system

without filling it with water. The humidification

heater will overheat, and the overtemp safety ther-

mostat will shut the humidification system down.

The humidity reservoir will require approximately one

quart (0.946 liter) of water on the initial filling. For best opera-

tion of the incubator, sterilized distilled, demineralized or de-

ionized water should be used in the humidity reservoir. Water

purity should be in the resistance range of 50K Ohm/cm to 1M

Ohm/cm, or a conductivity range of 20.0 uS/cm to 1.0 uS/cm.

Refer to ASTM Standard D5391-93 or D4195-88 for measuring

water purity.

Distillation systems, as well as some types of reverse

osmosis water purity systems, can produce water in the quality

range specified. Tap water is not recommended as it may con-

tain chlorine, which can deteriorate the stainless steel. Tap

water may also have a high mineral content, which would pro-

duce a build-up of scale in the reservoir. High purity, ultra pure

or milli-q water is not recommended as it is an extremely

aggressive solvent and will deteriorate the stainless steel. High

purity water has a resistance of above 1M Ohm to 18M Ohm.

Even high purity water can contain bacteria and organic con-

taminants. Water should always be sterilized or treated with a

decontaminant, safe for use with stainless steel as well as safe

for the product, prior to being introduced into the humidity

reservoir.

Distilled or de-ionized water used in the humidity

reservoir must be within a water quality resistance

range of 50K Ohm/cm to 1M Ohm/cm to protect

and prolong the life of the stainless steel. Use of

water outside the specified range will decrease the

operating life of the unit and may void warranty.

Section 1 - Receiving

1.1 Preliminary Inspection

This incubator was thoroughly inspected and carefully

packed prior to shipment and all necessary precautions were

taken to ensure its safe arrival. Immediately upon receipt,

before the incubator is moved from the receiving area, carefully

examine the shipment for loss or damage. Unpack the incubator

and inspect its 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 evi-

dence 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 circum-

stances move the shipment from the receiving area.

1.3 Responsibility for Shipping Damage

For products shipped F.O.B. Marietta, Ohio, the responsi-

bility of Thermo Electron ends when the merchandise is loaded

onto the carrier’s vehicle.

On F.O.B. Destination shipments, Thermo Electron and the

carrier’s responsibility ends when your Receiving Department

personnel sign a free and clear delivery receipt.

Whenever possible, Thermo Electron will assist in settling

claims for loss or in-transit damage.

2 - 1

Model 3911/3913 ____________________________________________________________________Installation and Set-Up

2 - 2

2.3 Remote Data Output

a. RS-232 Data Output

The Model 3911/3913 incubator is equipped with an RS-

232 Serial Communication Interface for the remote transmis-

sion of temperature and humidity data. A terminal strip is locat-

ed on the back of the incubator for convenience. Refer to

Figure 2-2 for terminal pin identification.

b. Remote Alarm Contacts

Remote alarm connections are also included on the termi-

nal strip (Figure 2-2) providing Normally Open (N.O.) and

Normally Closed (N.C.) contacts. C is the Common terminal.

The remote alarm will activate when either the incubator’s tem-

perature or humidity go out of the set alarm limits.

2.4 Power Connection

See the serial tag on the side of the unit for electrical spec-

ifications, or refer to the electrical schematics at the end of this

manual.

Connect the incubator to a grounded, dedicated

circuit. The power cord connector is the mains

disconnect device for the incubator. Position the

incubator so the unit can be easily disconnected.

For Model 3911, plug the provided 10 ft. power cord with

the NEMA 14-20 plug into the power outlet connection on the

back of the cabinet, then into the grounded dedicated electrical

circuit.

For Model 3913, the electrical junction box is located on

the rear top section of the incubator. With the junction box

switch OFF, connect the incubator to an adequate power source.

The water inlet is the 1/8” FPT connection located on the

rear top left corner of the incubator. Water inlet pressure must

not exceed 40 PSI. a manual shut-off valve should be installed

between the main water supply and the incubator.

To prevent mineral buildup on heater coils and

humidity generator walls, it may be necessary to

clean the humidity generator and immersion

heaters with a non-metallic abrasive pad and

flush thoroughly every two to three months. Refer

to Section 5.7, Cleaning and Adjusting the

Humidity Steam Generator.

b. Alternate Water Supply for Humidity System

If an in-house water supply of the required purity range

(50K to 1M Ohm) is not available, an alternate water supply

method can be used. A large vented carboy (5 gal. minimum) of

water in the required purity range can be placed on top of the

unit. Connect it to the 1/8” FPT water inlet fitting, located on

the rear top left corner of the incubator.

IMPORTANT: The maximum water consumption of this incu-

bator could be as high as 2 gallons per day. When using an

alternate water supply method, it is imperative that the humidity

reservoir not be allowed to run dry, as permanent damage to the

steam generator will result.

c. Connecting the Drain Line

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 the P-trap onto

the connection. Make sure that

the trap is positioned down.

3. Push a piece of 3/8” ID tubing

onto the trap and direct the tub-

ing to a convenient drain*.

Install a hose clamp on the tub-

ing, if desired.

* A condensate pump (184062) or evaporator (1900031) is

also available.

Figure 2-2

Figure 2-1

Cabinet drain P-trap

Model 3911/3913 ____________________________________________________________________Installation and Set-Up

2 - 3

2.7 Setting the Undertemp Safety Thermostat

Allow the chamber temperature and humidity 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 tem-

perature 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 con-

trol 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.

2.8 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.

Figure 2-3

2.5 Start-Up

When the humidification system is operational, the incuba-

tor may be started. Preset the controls as follows:

Overtemp Safety Thermostat . . . . . . . . . . . . . Fully Clockwise

Undertemp Safety Thermostat . . . . . . Fully Counterclockwise

Main Power Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ON

Humidity Controller . . . . . . . . . . . . . . . . . . . .Desired Setpoint

Temperature Controller . . . . . . . . . . . . . . . . . .Desired Setpoint

Door Heater . . . . . . . . . . . . . . . . . . . . . . . . . .40% (factory set)

For best overall performance of the incubator, the refrigera-

tion switch should be turned on for most applications. When

running Low or No humidity at high temperatures, the refriger-

ation switch may be turned off.

The defrost switch must be turned on when the

temperature setpoint is 10°C, or below.

2.6 Setting the Overtemp Safety Thermostat

Allow the chamber temperature and humidity to stabilize

then set the overtemp safety thermostat as follows:

1. Turn the overtemp control knob slowly counterclock-

wise until the audible alarm sounds and the overtemp

indicator lights.

2. Turn the overtemp control knob clockwise approximate-

ly 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 con-

trol 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.

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.

Model 3911/3913 ____________________________________________________________________Installation and Set-Up

2 - 4

2.9 Honeywell Recorder (optional)

The Honeywell, DR 4500 Recorder is a one to four-chan-

nel microprocessor-based, circular chart recorder.

The recorder is capable of recording both temperature and

humidity and printing alphanumeric chart data on blank heat-

sensitive chart. Refer to the Honeywell Configuration Record at

the end of Section 5 and the supplemental Honeywell Recorder

Manual.

2.10 1900140 IR CO2Option

This section applies to units with the 1900140 IR CO2

option only.

a. Connecting the CO2Source (Figure 2-4)

For the most economical use, the liquid CO2supply tanks

should be without siphon tubes, so that only CO2gas enters the

incubator injection system. Two tanks may be joined together

with a manifold to ensure a continuous CO2supply.

Install a two-stage pressure regulator, with indicating

gauges, at the supply cylinder outlet. The high-pressure gauge

should have an indicating range of 0 to 2000 psig to monitor

tank pressure. The low-pressure gauge should have an indicat-

ing range of 0 to 30 psig to monitor input pressure to the incu-

bator injection system. A suitable two-stage pressure regulator

is available.

The CO2source must be regulated at a pressure level

between 5 and 10 psig. Higher pressure levels may damage the

CO2control system. The user should determine the most eco-

nomical pressure level, between 5 and 10 psig appropriate for

the desired CO2percentage in the chamber. Use only sufficient

pressure to maintain recovery time after door openings.

To connect the CO2supply:

1. Insert the copper tub-

ing provided with the

unit as far as it will go

into the nut of the CO2

connection.

2. Turn the nut until it is

finger-tight.

3. For reference, scribe the nut at the 6:00 position.

4. While holding the fitting body steady with a wrench,

tighten the nut 1-1/4 turns until the mark is at the 9:00

position.

5. Securely attach the CO2line to the open end of the cop-

per tubing.

6. Check the tubing connection for leaks.

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.

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 envi-

ronmental practices.

b. Changing the Chart Paper

1. Press the Change Chart button (#3) and hold it for 1 sec-

ond until the pen begins to move to the left of the chart.

See Figure 2-3.

2. Remove the existing chart by unscrewing the center

knob securing it.

3. Install the new chart, positioning it so that the correct

time line coincides with the time line groove on the

chart plate.

4. Replace the center knob and screw it tightly against the

chart.

c. Changing the Pen

1. Using a small flatblade screwdriver, loosen the 2 screws

holding the pen arm. Remove the pen and arm as an

assembly.

2. Unsnap the plastic hinge securing the pen. Remove and

discard the old pen.

3. Install the new pen by snapping the hinge securely

around the pen arm.

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.

5. 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.

Figure 2-4

b. Setting the CO2 Content

The Watlow 93 CO2controller's upper display shows the

actual CO2content inside the chamber. The lower display

shows the CO2setpoint.

Before setting the CO2content, allow the chamber temper-

ature and humidity to stabilize. Do not open door during the

stabilization period.

To set the CO2content, press the up or down arrow keys

on the Watlow 93 Controller.

c. CO2Control and Indicators

•Sample Port (Refer to Figure 2-5)

The sample port is used for checking CO2percentage in the

incubator chamber by an independent test instrument (such as

with a Fyrite, or similar CO2test instrument).

To prevent CO2loss, the sample port must be capped when it

is not in use.

• CO2 Alarm (Refer to Figure 2-5)

The CO2alarm is factory-set to activate when the chamber

CO2content deviates ±5%. When a CO2alarm occurs, the CO2

Alarm indicator on the control panel lights and the audible

alarm sounds.

The CO2alarm high and low setpoints are established

through the Watlow 93 CO2controller (ALO, and AHI). Refer

to the Configuration Record included in Section 5.

Model 3911/3913 ____________________________________________________________________Installation and Set-Up

2 - 5

Figure 2-5

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