Thermo Scientific 815 Operating instructions

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User Manual
Thermo Scientific Precision Model 815
Refrigerated Incubator - Microprocessor Controlled
Operating and Maintenance Manual 7013721 Rev. 2

Thermo Scientific
Manual Number 7013721
2 40096/SI-12271 9/8/16 Updated part number on pg 8-1 from 1900381 to 1890063 ccs
1 40714/IN-4710 2/11/16 Updated 3185052 schematic to 50/60Hz on pg 9-2 ccs
0 40096 4/3/15 Original - new cabinet, cooling On/Off switch, model numbers ccs
Rev ECR/ECN Date Description By
Preface
Refrigerated Incubator i
Catalog/Model Numbers Volume (L/cu. ft.) Voltage
PR505755R / 3721 566/20 115
PR505750R / 3722 566/20 230
PR505750R-CN / 3722CN, 3723 566/20 230
Units covered in this manual:

Thermo Scientificii Refrigerated Incubator
Preface
Contains Parts and Assemblies
Susceptible to Damage by
Electrostatic Discharge (ESD)
CAUTION
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
Warning Depending on ambient temperature and settings, surface can become warm to touch (up to 60°C). s
Material in this manual is for information purposes only. The contents and the product it describes are subject
to change without notice. Thermo Fisher Scientific makes no representations or warranties with respect to this
manual. In no event shall Thermo be held liable for any damages, direct or incidental, arising out of or related to
the use of this manual.
©2015 Thermo Fisher Scientific. All rights reserved.

Thermo Scientific Refrigerated 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.
Marking of electrical and electronic equipment, which applies to electrical and electronic equipment
falling under the Directive 2002/96/EC (WEEE) and the equipment that has been put on the market
after 13 August 2005.
This product is required to comply with the European Union’s Waste Electrical & Electronic
Equipment (WEEE) Directive 2002/96/EC. It is marked with the WEEE symbol. Thermo Fisher
Scientific has contracted with one or more recycling/disposal companies in each EU Member State
European Country, and this product should be disposed of or recycled through them. Further
information on Thermo’s compliance with this directive, the recyclers in your country and
information on Thermo Scientific products will be available at www.thermoscientific.com.
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.

Thermo Scientificiv Refrigerated Incubator
Preface
Do You Need Information or Assistance on
Thermo Scientific Products?
If you do, please contact us 8:00 a.m. to 6:00 p.m. (Eastern Time) at:
1-740-373-4763 Direct
1-800-438-4851 Toll Free, U.S. and Canada
1-877-213-8051 FAX
http://www.thermoscientific.com Internet Worldwide Web Home Page
[e-mail] Tech Support Email Address
Certified Service Web Pagewww.unitylabservices.com
Our staff can provide information on pricing and give you quotations. We canSales Support
take your order and provide delivery information on major equipment items or make
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.
Our staff can supply technical information about proper setup, operation orService Support
troubleshooting of your equipment. We can fill your needs for spare or replacement parts or
provide you with on-site service. We can also provide you with a quotation on our Extended
Warranty for your Thermo Scientific products.
Whatever Thermo Scientific 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 it yourself...over the telephone without a service
call.
When more extensive service is necessary, we will assist you with direct factory trained
technicians or a qualified service organization for on-the-spot repair. If your service need is
covered by the warranty, we will arrange for the unit to be repaired at our expense and to your
satisfaction.
Regardless of your needs, our professional telephone technicians are available to assist you
Monday through Friday from 8:00 a.m. to 6:00 p.m. Eastern Time. Please contact us by
telephone or fax. If you wish to write, our mailing address is:
Thermo Fisher Scientific (Asheville) LLC
401 Millcreek Road, Box 649
Marietta, OH 45750
International customers, please contact your local Thermo Scientific distributor.

Thermo Scientific Refrigerated Incubator v
Preface
Warranty Notes
Information You Should Know Before Requesting Warranty Service
•Locate the model and serial numbers. A serial tag is located on the unit itself.
•For equipment service or maintenance, or with technical or special application inquiries, contact Technical
Services at 1-800-438-4851 or 1-740-373-4763 (USA and Canada).Outside the USA,contact your local
distributor.
Repairs NOTCovered Under Warranty
•Calibration of control parameters. Nominal calibrations are performed at the factory; typically ±1°Cfor
temperature, ±1% for gases, and ±5% for humidity.Our service personnel can provide precise calibrations as
abillable service at your location. Calibration after awarranty repair is covered under the warranty.
•Damage resulting from use of improper quality water, chemicals or cleaning agents detrimental to
equipment materials.
•Service calls for improper installation or operating instructions. Corrections to any of the following
are billable services:
1)electrical service connection
2)tubing connections
3)gas regulators
4)gas tanks
5)unit leveling
6)room ventilation
7)adverse ambient temperature fluctuations
8)any repair external to the unit
•Damage resulting from accident, alteration, misuse, abuse, fire, flood, acts of God, or improper
installation.
•Repairs to parts or systems resulting from unauthorized unit modifications.
•Any labor costs other than that specified during the parts and labor warranty period, which may
include additional warranty on CO2sensors, blower motors, water jackets, etc.

Section 4
Section 5
Section 6
Section 8
Section 7
Refrigerated Incubator viThermo Scientific
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Unpacking and Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Explanation of Front Panel Controls . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Explanation of Auxiliary Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Instrumentation Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Operation and Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Symptoms and Possible Causes . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Possible Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
General Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
RS232 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Setting Up the Incubator for Communication . . . . . . . . . . . . . . . .6-2
Using the Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
Setting up the Computer for Communication . . . . . . . . . . . . . . . .6-5
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-2
Section 1
Section 2
Section 3

Refrigerated Incubator 1-1Thermo Scientific
Section 1 Introduction
Your satisfaction and safety are important to Thermo and a complete
understanding of this unit is necessary to attain these objectives.
Warning As a routine laboratory precaution, always wear safety glasses
when working with this apparatus. s
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
Class I, II or III locations as defined by the National Electrical Code.
Warning If this equipment is not used as specified in this manual, the
protection provided by the unit design may be impaired. s
Save all packing material until unit is put into service. This merchandise
was carefully packed and thoroughly inspected before leaving our factory.
Responsibility for safe delivery was assumed 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:
1. Visible Loss or Damage: Note any external evidence of loss or damage
on the freight bill, or express receipt, and have it signed by the carrier's
agent. Failure to adequately describe such external evidence of loss or
damage may result in the carrier's refusing to honor your damage
claim. The form required to file such claim will be supplied by the
carrier.
2. Concealed Loss or Damage: Concealed loss or damage means 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 fifteen (15) days of the
delivery date; then file a claim with the carrier since the damage is the
carrier's responsibility.
If you follow the above instructions carefully, we will guarantee our full
support of your claim to be compensated for loss or concealed damage.
Note Do not - for any reason - return this unit without first obtaining
authorization. In any correspondence to Thermo, supply the nameplate
data, including catalog number and serial number. s
Unpacking and
Damage

1-2 Refrigerated Incubator Thermo Scientific
Section 1
Installation and Start-Up
The incubator is commonly referred to as the standard model 815.
The Model 815 Refrigerated Incubator has been designed to provide the
ultimate in temperature control. The user is assured of dependable and
precise performance through the use of microprocessor technology in the
temperature control circuitry. This incubator is operable in the range of
-10° to 50°C. These temperature ranges will meet a wide variety of
applications, such as BOD determination, general incubation, as well as
the preservation of critical materials.
General Information
Performance Data
Set
temperature
Uniformityvalues:
Temperature deviation
from set value, spatial
(3 point measurement)
Uniformityvalues:
Temperature deviation
from set value, spatial
(27 point measurement
according to DIN 12880)
Temperature stability:
Maximum temperature
difference at chamber
center point (1 point
measurement)
Energy
consumption
Heat up time / Cool
down time from
ambient temperature
according to DIN
12880
Recoverytime
after door open-
ing according to
DIN 12880
-10°C ±0.8°C ±1.3°C ≤ ±0.25°C ≤ 0.3 kW ≈ 80 min ≈ 10 min
+20°C ±0.5°C ±0.9°C ≤ ±0.15°C ≤ 0.6 kW N/AN/A
+37°C ±0.3°C / ±0.5°C ±0.5°C / ±0.9°C ≤ ±0.10°C ≤ 0.1 kW /
≤ 0.6 kW ≈ 40 min ≈ 5 min
+50°C ±0.5°C / ±0.3°C ±0.7°C / ±0.9°C ≤ ±0.15°C ≤ 0.15 kW/
≤ 0.6 kW ≈ 70 min ≈ 11min
Note The above performance figures are based upon the following operating conditions:
-Ambient temperature of 22°C, ±3°C
-Line voltage 115V, ±5% (115V version) and 230V, ±5% (230V version)
-The following test protocols have been used:
3 point measurement test: 1 thermocouple sensor in center of each shelf - 1 shelf top position, 1 shelf lowest
position, 1 shelf middle position
27 point measurement test: 9 x thermocouples on each shelf - 1 shelf top position, 1 shelf lowest position, 1
shelf middle position (based on DIN 12880)
1 point measurement test: 1 thermocouple at chamber center point (temporal temperature variation
characterized by the maximum temperature difference)

The refrigeration system, defrost heater, and air circulating fan are used in
conjunction with a microprocessor controlled proportioning circuit to
achieve sensitive temperature control. An RTD (Resistance Temperature
Detector) located in the airstream senses any temperature deviation from
the control point, and heat is provided proportionally to maintain the
desired temperature. Regardless of what temperature is being maintained,
the compressor operates continuously. This constant operation alleviates
component failures associated with cycle type operation.
The circulating fan provides even air distribution throughout the chamber
and ensures temperature uniformity.
Heater On Lamp - Illuminates when power is applied to the heater.
LED Display - Four digits used to display the actual, set, calibrated, high
limit and low limit values.
Indicator Lamps - There are five (5) green indicator lamps that support
the parameter showing on the display. The sixth indicator is for a high
or low temperature alarm condition. An internal audible alarm will also
sound when this alarm indicator illuminates.
Power On/Off Switch - The Power On/Off switch provides the main
power to the incubator.
Cooling On/Off Switch - The On/Off Cooling Switch provides better
energy and temperature performance when setting a temperature greater
than ambient (+5°C). When the setting temperature is greater than
ambient (+5°C), set the cooling switch to “Off” position.
Mute Key - This key is used to silence the internal audible alarm and to
de-activate the external alarm device, if one is being used.
High/Low Limit Key - This key is used to view the high or low tempera-
ture alarm setpoint. The first depression of the key selects the high
limit. The second depression selects the low limit. The respective green
indicator lamp will light.
Refrigerated Incubator 1-3Thermo Scientific
Section 1
Installation and Start-Up
Theory of Operation
Explanation of Front
Panel Controls
POWER
COOLING
>AMBIENT+5°C
Figure 1-1. Front Panel

Set Temp/Cal Key - This key is used to view the operating setpoint tem-
perature or calibrate the unit to a certified/traceable thermometer. The
first depression of the key selects the operating setpoint and the second
depression selects the calibration mode. The respective green indicator
lamp will light.
Enter Key - This key is used after any setpoint selection is made to enter
the value into memory.
Up/Down Arrow keys - These keys are used to increase or decrease the
desired setpoint value.
On the left side of the incubator control panel, there is an auxiliary panel
which has the items shown in the illustration below. They are described as
follows:
1) Fuse - This fuse is in line with the main power cord that comes into the
incubator. The rating of this fuse is printed above the fuse holder. The
physical size of this fuse is 5mm x 20mm.
2) Alarm Relay - This Alarm Relay output is provided to the user for the
purpose of remotely monitoring the incubator in case of a high or low
temperature alarm condition. This alarm relay will operate just as the
audible alarm would. The contact itself is an isolated form C (normally
open/normally closed) dry contact. This contact is to be used for low
voltage class 2 connections only. The contact rating is 24 volts, 1.25
amps resistive. Typical usages of the output are shown below.
In the above configuration, the light will illuminate whenever the unit goes
into an alarm condition...High or Low.
In the configuration below, the light will go off in a high or low
temperature alarm condition.
Warning Wiring must conform to all local electrical codes. s
1-4 Refrigerated Incubator Thermo Scientific
Section 1
Installation and Start-Up
Explanation of Auxiliary
Panel
Explanation of Front
Panel Controls (cont.)

Refrigerated Incubator 1-5Thermo Scientific
Section 1
Installation and Start-Up
3) RS-232 Output (Optional Kit P/N 3166245) - This output is used for
two way communications between the incubator and a personal
computer. With the use of communications/modem software program,
the user can record the temperature of the incubator at their selected
time periods and store it in a file for use with a spreadsheet program.
The user can also change the setpoint temperature from their personal
computer and periodically monitor the actual temperature, setpoint
temperature, and alarm status.
4) Recorder Output - This is a DC millivolt output which represents the
temperature of the incubator. The recommended main use of this is
with a chart recorder having an input impedance of at least 1 megohm.
The scaled temperature output change is 10 millivolt/degree C. When
the incubator is operating at a negative temperature, the chart recorder
output is still positive. Use the chart below to relate temperature to
output voltage.
Located on the chart recorder printed circuit board is an offset
potentiometer R3. If, for some reason, the recorder output voltage
does not match the temperature as shown in the chart, this
potentiometer can be used to tune it in.
When connecting a chart recorder to the recorder output connector, it
is recommended to use a shielded cable with the shield grounded at
the chart recorder and to keep the cable short as possible.
Located on the rear side of the incubator is an instrumentation port for the
user to insert sensor wires, external meter leads, etc. into the chamber. The
rubber plug provided must always be used in this port to insure the
uniformity specifications. An extra plug is supplied for the user's
convenience. Be sure to seal any gaps around the wire(s) going through the
plug.
Explanation of Auxiliary
Panel (continued)
Instrumentation Port

Refrigerated Incubator 2-1Thermo Scientific
Section 2 Installation
Use the proper lifting equipment when moving this unit. The unit’s
shipping weight is 315 lbs. ((142.9kg).
To assure proper ventilation, allow a minimum of 4" of clearance between
the rear, top, and sides of the incubator and adjacent walls. If two or more
incubators are positioned side by side, allow a minimum of 8" between
cabinets. Adjust the front leveling feet of the incubator so that the front is
higher than the rear. This will assist in door closing. Choose a site free
from rapidly changing ambient temperature conditions.
Wall mount brackets are attached to the top rear of the cabinet. Remove
any packaging materials from the brackets. Rotate the brackets so they
point straight out from the back. Secure in place with the included
hardware. Attach brackets to wall.
The power cord is the mains disconnect. Make sure the outlet and power
cord are accessible at all times.
Caution The incubator should not be operated in an environment where
the ambient temperature exceeds 90°F as the compressor thermo-overload
will be tripped and will result in a wide band control cycle of
approximately ±4°C. Such cycling should not be misinterpreted as a
malfunction of the electronic controls. s
Radiators, air-conditioning outlets, other ventilating system outlets, and
drafts can affect the operation of the incubator by a sudden inrush of air
that is at a temperature different than operating conditions.
Warning For personal safety, this apparatus must be properly grounded. s
Figure 2-1. Brackets During Shipping Figure 2-2. Brackets During Use

2-2 Refrigerated Incubator Thermo Scientific
Section 2
Calibration
The power cord of this instrument is equipped with a three-prong
(grounding) plug which mates with a standard three-prong (grounding)
wall receptacle to minimize the possibility of electric shock hazard from
this apparatus. The customer should have wall receptacle and circuit
checked by a qualified electrician to verify 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 properly
grounded three-prong wall receptacle.
Warning Do not - under any circumstances - cut or remove third (ground)
prong from the power cord. Do not use a two-prong adapter plug. s
Determine the total amount of current presently being used by other
apparatus connected to the circuit that will be used for this unit. It is
critical that the added current demand and other equipment on the circuit
not exceed the rating of the fuse or circuit breaker in use.
Caution Be sure the power supply is the same voltage as specified on the
nameplate. s
When loading the incubator, a space of 1/2" must be allowed between
adjacent items. This will allow maximum air circulation, which is necessary
for proper temperature uniformity. The uniformity will be adversely
affected if air circulation is obstructed.
Liquid containers should never be placed in the incubator without covers.
The evaporation of moisture within the chamber will only add frost and
hasten the need for defrosting. This chamber is not self-defrosting.
Excessive frost buildup on the evaporator coil located on the lower rear
wall will also affect temperature uniformity.
1. Do not place any explosive, combustible, or flammable materials in the
chamber.
2. Do not place sealed containers in the chamber. Sealed containers, filled
with materials do not provide room for expansion and can develop
dangerous vapor pressure as the temperature increases.
3. Avoid spillage of liquids within the chamber.
4. Do not evaporate noxious fumes.
Caution Do not store containers filled with acidic or caustic solutions, as
vapors from these materials will attack the evaporator and void the
warranty. s
Safety Precautions

Refrigerated Incubator 3-1Thermo Scientific
Section 3 Operation and Calibration
Power up by depressing the ON/OFF switch. Immediately after turning
on power, all the segments of the display and all of the indicators will be
on. After one second the display will show the actual temperature and the
actual temperature indicator light will be lit. If the setpoint temperature is
greater than the actual temperature, then the heater on lamp will be on or
start to flash. If it flashes, then the actual temperature is near setpoint
temperature.
To display any temperature value - With the use of either the SET
Temp/Cal key or the HIGH/LOW LIMIT key, any temperature value can
be displayed. To view the set temperature, press the set Temp/Cal key
once. The green indicator for the set temperature will light. If no other
keys are pressed, within 5 seconds, the display will automatically return to
the actual temperature. To view the calibrate temperature, press SET
TEMP/ CAL twice while the display is showing the actual temperature.
The same sequence of key operation is true for the use of the HIGH/LOW
LIMIT key.
To change the setpoint temperature - Press the SET TEMP/CAL key
once. Then press the UP or DOWN arrow key until the desired
temperature is displayed. When continuously pressing either the UP or
DOWN keys, the display will begin to change rapidly. With a little
practice, one will become accustomed to this. After the desired set
temperature is achieved, then press the ENTER key. The display will then
return to showing the actual temperature. If the ENTER key is not
pressed, the expected new set temperature will not be accepted and the
incubator will control at the previous set temperature.
If the setpoint temperature is over ambient temperature by more than 5°C,
the "compressor cooling function" isn't needed. Set the cooling switch at
the “Off” position. Then the energy and temperature performance will
provide better values.
The incubator is calibrated at the factory for use over a wide range of
temperatures. Due to the slight non-linearities in the control system, it
may be necessary to make the display match a calibrated thermometer's
reading, even though the difference might be only a few tenth's of a
degree.

3-2 Refrigerated Incubator Thermo Scientific
Section 3
Operation and Calibration
The CALIBRATE key should be used ONLY to match a stable incubator's
actual temperature to the calibrated thermometer.
Place a calibrated thermometer or the probe of one at the center of the
third shelf of the incubator. Select the SETPOINT desired. Allow the unit
to run for at least an hour after it reaches the setpoint, before calibration is
performed.
Note If possible, place the thermometer into a liquid for stability. s
To perform calibration, press the SET TEMP/CAL twice. The green
calibration indicator should be lit. Then press either the UP or DOWN
arrow keys to make the display match the noted thermometer reading.
After the satisfied display is achieved, press the ENTER key. The display
will then return to showing the newly calibrated actual temperature.
To change the high temperature alarm/setpoint - After selecting a
setpoint temperature, the HIGH TEMPERATURE ALARM SETPOINT
automatically defaults to 1° higher than the setpoint that was entered. This
1° default difference can be overridden if desired. The following paragraph
describes this.
Press the HIGH/LOW LIMIT key once. The green "High Temperature
Alarm/Set Point" indicator should be lit. Use the UP or DOWN arrow
keys to select your limit value. Then press the ENTER key. If the HIGH
LIMIT value you have selected is below the operating SETPOINT
TEMPERATURE, the incubator alarm will activate.
Caution If the default high temperature alarm setpoint (1°C above
setpoint) is increased, the new alarm temperaure value will remain valid
until power is removed from the unit (turning off the power switch,
unplugging or power failure). When power is restored, the alarm setpoint
will revert back to the default. s
To change the low temperature alarm/setpoint - After selecting a setpoint
temperature, the LOW TEMPERATURE SETPOINT automatically
defaults to 1° lower than the setpoint that was entered. This 1° default
difference can be overridden if desired. The following paragraph describes
this.
Press the High/Low Limit key twice. The green "Low Temperature
Alarm/Setpoint" indicator should be lit. Use the UP or DOWN arrow
keys to select your limit value. Then press the ENTER key. If the LOW
LIMIT value you have selected is above the operating setpoint
temperature, the incubator alarm will activate.

Refrigerated Incubator 3-3Thermo Scientific
Section 3
Preventive Maintenance
Caution If the default low temperature alarm setpoint (1°C above setpoint)
is increased, the new alarm temperaure value will remain valid until power
is removed from the unit (turning off the power switch, unplugging or
power failure). When power is restored, the alarm setpoint will revert back
to the default. s
Note Software Version 2.00 and later has a 30 minute delay for the low
and high alarm to avoid nuisance alarms caused by door openings. s