Cardinal Health 3850 User manual

CO2 Incubator – 29 cu ft.
Instruction Manual
Cat. CH3850

Cardinal Health
Manual Number 7003850
0 -- 3/3/14 Original ccs
RevECR/ECNDate Description By
Preface
Reach-In Incubator i
Covered in this manual
Catalog # Model #
CH3850 3850

Cardinal Healthii Reach-In Incubator
Preface
Important 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. s
Caution All internal adjustments and maintenance must be performed by qualified service personnel. s
Warning If the incubator is not used in the manner specified in this operating manual, the protection provided
by the equipment design may be impaired. s
Caution When operating this unit under high temperatures and/or relative humidity (RH), caution must be
observed when the unit is shut down, unexpectedly or by choice. Condensate can form on the interior of the
chamber as it cools. This includes the heating element surfaces. Heavy condensate can bridge the ceramic
insulators and cause a temporary electrical short to ground. This electrical circuit is protected by a circuit
breaker. However, to avoid this contingency if these conditions occur, open the door of the unit and allow it
to stand open until the water vapor disperses. s
The CO2 incubator described in this manual is a high performance unit that can be used for research and to
support medical applications. More specifically, this product is intended for:
• Use as a general purpose microbiological CO2 incubator
• Medical purposes to cultivate microorganisms and diagnostic use (storage of samples not intended to be
re-introduced to the human body).
When used for these medical purposes, this CO2 incubator is regulated as a Class I medical device by the U.S.
Food and Drug Administration (“FDA”).
Material in this manual is for information purposes only. The contents and the product it describes are subject
to change without notice. Cardinal Health makes no representations or warranties with respect to this
manual. In no event shall Cardinal Health be held liable for any damages, direct or incidental, arising out of or
related to the use of this manual.

Cardinal Health Reach-In Incubator iii
Preface
Important operating and/or maintenance instructions. Read the accompanying text carefully.
Potential electrical hazards. Only qualified persons should perform procedures associated with this
symbol.
Equipment being maintained or serviced must be turned off and locked off to prevent possible
injury.
Hot surface(s) present which may cause burns to unprotected skin, or to materials which may be
damaged by elevated temperatures.
4Always use the proper protective equipment (clothing, gloves, goggles, etc.)
4Always dissipate extreme cold or heat and wear protective clothing.
4Always follow good hygiene practices.
4Each individual is responsible for his or her own safety.

Reach-In Incubator ivCardinal Health
Table of Contents
Installation and Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Control Panel Keys, Displays, & Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Keypad Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Preliminary Cleaning and Disinfecting . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Installing the Shelves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Leveling the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Attaching the Drain Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
The Water Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Filling the Humidity Reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Connecting the Unit to Electrical Power . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Connecting the CO2 Gas Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Incubator Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
Setting the Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
Setting the Overtemp Setpoint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10
Setting the CO2 Setpoint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Calibrating the Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Calibrating the CO2 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Disable the ADD WATER Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Turn All Audible Alarms ON/OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Set a Low Temp Alarm Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Set an Access Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Enable Temp Alarms to Trip Relay Contacts . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Set Low CO2 Alarm Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Set High CO2 Alarm Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Enable CO2 Alarms to Trip Relay Contacts . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
Set New Zero No. for New CO2 Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
Set New Span No. for CO2 Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-5
Enable the High Humidity Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-6
Section 1
Section 2
Section 3

v Reach-In Incubator Cardinal Health
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Sensor Fault Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Preventative Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Cleaning the Humidity Reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2
Discarding/Removing Incubator from Service . . . . . . . . . . . . . . . . . . . . . .5-3
Factory Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Connect the Remote Alarm Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Connect the RS485 Interface (P/N 190523) . . . . . . . . . . . . . . . . . . . . . . . . .6-2
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
Spare Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-1
Table of Contents
Section 4
Section 5
Section 6
Section 8
Section 7
Section 9

Reach-In Incubator 1-1Cardinal Health
Section 1 Installation and Start-Up
Figure 1-1. Front View Figure 1-2. Side View
Figure 1-3. Back View
Figure 1-4. Top View
Sample Port
Door Latch
Heated
Chamber Door
Adjustable
Feet, 4”
Casters
Control Panel
Power Switch
Power Inlet
1/4” NPT Water Inlet
Drip Trough Drain
3/8” NPT w/ Plug
3/8” NPT
Overflow/Drain
1/4” ID Hose
CO2Connection
Alarm Contact
Connection
1/25 HP
Blower Motor
2.375”ID
Access Port
(both sides)
Float Valve
Float Switch

1-2 Reach-In Incubator Cardinal Health
Section 1
Installation and Start-Up
Figure 1-5. Control Panel Components
Silence - Silences the audible alarm.
Alarm Indicator - Light pulses on/off during an alarm condition in the
cabinet.
Mode Select Switch - Used to select Run, Setpoints, Calibration and
System Configuration Modes.
Message Center - Displays system status.
Mode Select Indicators -
• Run: Run Menu
• Set: Set Points Menu
• Cal: Calibrate Menu
• Config: Configuration Menu
Up and Down Arrows - Increases or decreases the number values, tog-
gles between choices.
Enter - Stores the value into computer memory.
Heat Indicator - Lights when power is applied to the heaters.
Temp Display – Displays temperature continuously
Scroll for Parameters Arrows - Moves the operator through the choic-
es of the selected mode.
CO2Inject Indicator - Lights when CO2is being injected into the incu-
bator.
% CO2 Display - Displays CO2percentage continuously.
Control Panel Keys,
Displays, & Indicators
Silence Mode System OK
36.9
4.9
Enter
Run Set Cal Config Heat Temp
Inject
% CO2
Scroll for Parameters
Temp Display
% CO Display
2
Heat Indicator
Enter
Up and Down
Arrows
CO Inject
Indicator
2
Scroll for Parameters
Mode Select
Indicators
Message
Center
Mode Select
Switch
Alarm Indicator
Silence

Reach-In Incubator 1-3Cardinal Health
Section 1
Installation and Start-Up
The Model 3850 Series Reach-In Incubator has four basic modes that
allow incubator setup: Run, Setpoints, Calibration and System
Configuration.
• Run is the default mode during normal operation.
• Set is used to enter system setpoints.
• Calibration is used to calibrate various system parameters.
• Configuration allows for custom setup of various options.
The chart below shows the selections under each of the modes.
Keypad Operation
RUN SETPOINT CALIBRATION CONFIGURATION
Default Mode Temperature Temp Offset Audible
Overtemp CO2 Cal Access Code
CO2 Temp Lo Alarm
Temp Relay
CO2 Lo Alarm
CO2 Hi Alarm
CO2 Relay
CO2 Z & S #'s
RH High On/Off
H20 Alarm On/Off
Tank Select
Gas Guard
RS485 Address
**Base Unit Displays
**Option Displays

Scroll for Parameters Arrows
Steps the operator through the parameters of SET, CAL and CONFIG
Modes. The right arrow goes to the next parameter, the left arrow
returns to the previous parameter.
Up Arrow
Increases or toggles the parameter values that have been selected in
the SET, CAL, and CONFIG Modes.
Enter
Must press Enter key to save to memory all changed values.
Down Arrow
Decreases or toggles the parameter values that have been selected in
the SET, CAL and CONFIG Modes.
Silence Key
Press to silence the audible alarm. See Section 4 for alarm ringback
times.
Caution Units must be installed against a wall or similar structure.
Maintain three-inch clearance behind the incubator for electrical, water
and gas hook-ups. s
Locate the unit on a firm level surface capable of supporting the unit
weight of approximately 500 lbs.
Locate the unit away from doors and windows and heating and air
conditioning ducts.
Warning This incubator weighs approximately 500 lbs. Have sufficient
personnel available when moving. s
Disinfect all interior surfaces with a general-use laboratory disinfectant.
Rinse thoroughly with sterile distilled water, then 70% ethanol. Dry with
a sterile cloth as needed. Disinfect the shelf channels and shelves, then
rinse with distilled water before installing.
Caution Before using any cleaning or decontamination method except
those recommended by the manufacturer, users should check with the
manufacturer that the proposed method will not damage the
equipment. Accidental spills of hazardous materials on or inside this unit
are the responsibility of the user. s
1-4 Reach-In Incubator Cardinal Health
Section 1
Installation and Start-Up
Preliminary Cleaning and
Disinfecting
Unit Installation

Attaching the Drain Lines
The shelves may be installed at any
level in the incubator. Install a shelf
channel on each side. With the tabs
pointing up, attach the channel by
locating the rivet into a slotted hole,
far end first. Pull the channel toward
the front and slide the front rivet on
the channel into the slotted hole and
press down. Make sure that the
channels are opposite each other so
that the installed shelf will be level.
Place a bubble-type level on a shelf inside the incubator. Adjust the feet
as needed; counterclockwise to lengthen or clockwise to shorten. Level
the unit front-to-back and left-to-right.
Note Drain connections on the back of the unit are shipped capped. If
humidity is not required, the caps should be left on the drains. s
If manual or gravity feed method is used for humidity in the cabinet,
connecting the drains is optional.
If an in-house pure water supply is used to fill the reservoir, it is
recommended that the drains be connected to a floor drain.
Reach-In Incubator 1-5Cardinal Health
Section 1
Installation and Start-Up
Leveling the Unit
Installing the Shelves
Figure 1-6. Shelf Channel
Back of Unit
1/4” Water Inlet fitting
to 1/4” ID tubing
to in-house water supply
shut-off valve (30 PSIG max.)
Chamber Drain (Overflow) -
3/8” elbow with 3/8” hose barb fitting.
Install with fitting sloping slightly downward.
Condensate Drain -
3/8” fitting
to 3/8” ID hose
Back View
Floor
Figure 1-7. Top View of Fitting Connections

In-house Pure Water Supply
Filling the Humidity Reservoir
For best operation 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 to 1M Ohm/cm, or a
conductivity range of 20.0 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 contain chlorine, which can deteriorate the
stainless steel. Tap water may also have a high mineral content, which
would produce a build-up of scale in the reservoir. High purity or ultra
pure 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 to 18M Ohm. Even high purity water can contain bacteria
and organic contaminants. 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.
Caution Distilled or de-ionized water used in the humidity reservoir must
be within a water quality resistance range of 50K 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. s
The incubator is equipped with a liquid level float switch that detects
low water levels in the humidity reservoir and produces an alarm
condition. As all applications do not require humidity, this alarm can be
disabled. To disable the ADD WATER alarm, see Section 3. If humidity is
required in the current application, press the Silence key on the control
panel to mute the alarm while the humidity reservoir is being filled.
There are two methods for filling the humidity reservoir; an in-house
pure water supply and the manual methods.
All incubators provide a connection for using an in-house water supply.
Connect a low pressure (not more than 30 PSI) water line, equipped with
a manual shut-off valve, to the inlet fitting on the float valve reservoir.
The 1/4” hose connection is located on the rear of the incubator cabinet.
With the water turned on, a float valve inside the incubator regulates the
water level in the humidity reservoir. When the reservoir is full, a 10-
second audible tone is heard and the ADD WATER message no longer
displays.
1-6 Reach-In Incubator Cardinal Health
Section 1
Installation and Start-Up
The Water Supply

This fill system consists of a funnel attached to the side duct sheet and
tubing located inside the incubator. Disinfect the funnel and rinse with
sterile water before using. This funnel may be moved to a preferred
location by unscrewing the well nuts and disconnecting it from the
sidewall. Tighten the nuts after relocation. The holes allotted for funnel
use are slightly larger and in a centralized area. See Figure 1-8.
To fill the reservoir, pour sterile distilled water (approximately 2.5 gallons)
into the funnel. When the float switch trips, a 10-second audible tone
sounds and the ADD WATER message no longer displays. Add 1 gallon
after the 10-second tone is heard.
See the serial tag on the side of the unit for electrical specifications.
Warning 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. s
Plug the provided power cord into the power inlet connector on the
back of the cabinet, then into a grounded, dedicated electrical circuit.
Reach-In Incubator 1-7Cardinal Health
Section 1
Installation and Start-Up
Figure 1-8. Manual Feed Method with Funnel
Connecting the Unit to Electrical
Power
Manual Method

Warning High concentrations of CO2gas can cause asphyxiation.
OSHA Standards specify that employee exposure to carbon dioxide in
any 8-hour shift of a 40-hour work week shall not exceed the 8-hour time
weighted average of 5000 PPM (0.5% CO2). The short-term exposure limit
for 15 minutes or less is 30,000 ppm (3% CO2). Carbon dioxide monitors
are recommended for confined areas where concentrations of carbon
dioxide gas can accumulate.
This incubator is designed for CO2gas only. Connecting a flammable or
toxic gas could result in a hazardous condition.
Gases other than CO2should not be connected to this equipment. CO2
gas cylinders have a UN1013 label on the cylinder and are equipped with
a CGA 320 outlet valve. Check the gas cylinder for the proper
identification labels. The CO2gas supply being connected to the
incubator should be industrial grade, 99.5% pure. Do not use CO2gas
cylinders equipped with siphon tubes. A siphon tube is used to extract
liquid CO2from the cylinder, which can damage the pressure regulator.
Consult with your gas supplier to ensure that the CO2cylinder does not
contain a siphon tube. Gas cylinders should also be secured to a wall or
other stationary object to prevent them from tipping.
A two-stage CO2pressure regulator is required to be installed on the
outlet valve of the gas cylinder. Input pressure to the incubator must be
maintained at 15 psig (103.4 kPa) for proper performance of the CO2
control system. A single stage CO2pressure regulator will not maintain
15 psig (103.4 kPa) to the incubator as the pressure in the CO2cylinder
decreases; therefore, a two-stage regulator is recommended.
If higher purity CO2is desired inside the incubator (greater than 99.5%
pure), the pressure regulator should be constructed with a stainless steel
diaphragm, along with specifying the purity of the CO2from the gas
supplier. Follow the manufacturer’s instructions to ensure proper and
safe installation of the pressure regulator on the gas cylinder.
Consult your facility safety officer to ensure that the equipment is
installed in accordance with the codes and regulations applicable in your
area. s
The CO2gas supply being connected should be industrial grade 99.5%
pure and should not contain siphon tubes. Install a two-stage pressure
regulator at the cylinder outlet. The high pressure gauge at the tank
should have 0-2000 psig range. The low pressure gauge, at the
incubator inlet, should have a 0-30 psig range. Input pressure to the
incubator must be maintained at 15 psig (103.4 kPa), ±5 psig.
Caution Each tank should be connected to one incubator only. s
1-8 Reach-In Incubator Cardinal Health
Section 1
Installation and Start-Up
Connecting the CO2Gas Supply

Setting the Operating
Temperature
Incubator Start-Up
The incubator has serrated fittings on the back of the cabinet to connect
the gas supply (Figure 1-3). The fitting is labeled CO2 Inlet #1 Tank.
Secure connections with clamps. Check all fittings for leaks.
With the incubator properly installed, connected to power, the humidity
reservoir filled and the unit connected to a gas supply, system setpoints
can be entered. The following setpoints can be entered in Set Mode:
Temperature, Overtemperature and CO2. To enter Set Mode, press the
Mode key until the Set indicator lights. Press the right and/or left arrow
keys until the proper parameter appears in the message display center.
This incubator has an operating temperature setpoint range of 5.0°C
above ambient to 60.0°C. It is shipped from the factory with a
temperature setpoint of 10.0° C. At this setting, all heaters are turned off.
To change the operating temperature setpoint:
1. Press the Mode key until the Set indicator lights.
2. Press the right arrow until “Temp XX.X” is displayed in the message
center.
3. Press up/down until the desired temperature setpoint is displayed.
4. Press Enter to save the setpoint.
5. Press the Mode key until the Run indicator lights for Run mode or
press the right/left arrow keys to go to next/previous parameter.
Caution Any equipment placed inside chamber must be rated for unit
operating temperature and humidity. s
Reach-In Incubator 1-9Cardinal Health
Section 1
Installation and Start-Up
Connecting CO2Gas Supply
(continued)

Warning The independent overtemp system is designed as a safety to
protect the incubator only. It is not intended to protect or limit the
maximum temperature of the cell cultures or customer’s equipment
inside the incubator if an overtemp condition occurs. s
All Model 3850 Series incubators are equipped with a secondary
temperature monitoring system to monitor the air temperature inside
the cabinet. This system is designed as a safety device to turn off all
heaters in the event of a temperature control failure. The temperature
control point in the incubator will be approximately ±1°C of the
overtemp setpoint.
The overtemp setpoint is set by the factory (default) at 40°C. However,
the overtemp can be reset over a range from 0.5°C above the operating
temperature setpoint to 65°C.
If the incubator’s operating temperature setpoint is set above the
overtemp setpoint, the overtemp setpoint will automatically update to
1°C above the temperature setpoint. It is recommended that the
overtemp setpoint be maintained at 1°C over the operating temperature
setpoint.
To set the Overtemp setpoint:
1. Press the Mode key until the Set indicator lights.
2. Press the right arrow until Otemp XX.X is displayed in the message
center.
3. Press the up or down arrow until the desired Otemp setpoint is
displayed.
4. Press Enter to save the setting.
5. Press the Mode key until the Run indicator lights, or press the right or
left arrow to go to the next or previous parameter.
1-10 Reach-In Incubator Cardinal Health
Section 1
Installation and Start-Up
Setting the Overtemp Setpoint

All CO2cells are calibrated at the factory at 37°C, medium humidity and
10% CO2. Therefore, if a temperature setpoint of 37°C has been entered,
the humidity reservoir has been filled and the CO2control is set to run
between 0-10%, the CO2setpoint may be entered immediately.
Otherwise, it is important to allow the unit 12 hours to stabilize at the
temperature setpoint before entering the CO2setpoint.
All models of the incubator have a CO2setpoint range of 0.0% to 20.0%.
The incubator is shipped from the factory with a CO2setpoint of 0.0%.
At this setting, all CO2control and alarms are turned off.
To change the CO2setpoint:
1. Press the Mode key until the Set indicator lights.
2. Press the right arrow until “CO2 XX.X” is displayed in the message
center.
3. Press the up/down arrow until the desired CO2setpoint is displayed.
4. Press Enter to save the setpoint.
5. Press the Mode key until the Run indicator lights to go to Run mode,
or press the right/left arrow keys to go to next/previous parameter.
Reach-In Incubator 1-11Cardinal Health
Section 1
Installation and Start-Up
Setting the CO2Setpoint

Reach-In Incubator 2-1Cardinal Health
Section 2 Calibration
After the unit has stabilized, several different systems can be calibrated.
In the calibration mode, the air temperature, CO2and RH levels can be
calibrated to reference instruments. To access the calibration mode, press
the Mode key until the Cal indicator lights. Press the right and/or left
arrow until the proper parameter appears in the message center.
Calibration frequency is dependent on use, ambient conditions and
accuracy required. A good laboratory practice would require at least an
annual calibration check. On new installations, all parameters should be
checked after the stabilization period.
Prior to calibration, the user should be aware of the following system
functions. While the unit is in the calibration mode, all system control
functions are stopped so the unit remains stable. Readout of the system
being calibrated will appear on the message center. If no keys are
pressed for approximately five minutes while in Calibration mode, the
system will reset to Run mode so control functions are reactivated.
Caution Before making any calibration or adjustments to the unit, it is
imperative that all reference instruments be properly calibrated. s
Before calibration, allow the cabinet temperature to stabilize. Place the
calibrated instrument in the center of the chamber. The instrument
should be in the airflow, not against the shelf.
Temperature Stabilization Periods
Start-Up - Allow 12 hours for the temperature in the cabinet to stabilize
before proceeding.
Presently Operating - Allow at least 2 hours after the display reaches
setpoint for temperature to stabilize before proceeding.
Calibrating the
Temperature