Thermo Scientific 3625A User manual

Thermo Scientific Hi-Temp
Programmable Vacuum Oven
Operating Manual 107567 Rev. 0
_________________________________________________________________________________
Part of Thermo Fisher Scientific

Thermo Scientific
MANUAL NUMBER 107567 (7006250)
0 -- 3/31/10 Transfer to Marietta (was 107567 2/6/09) ccs
REV ECR/ECN DATE DESCRIPTION By
Preface
Programmable Vacuum Oven i
Models covered in this manual
Catalog numbers Model numbers Voltage
3625A 6250 120V
3625A-1 6251 240V

Thermo Scientificii Programmable Vacuum Oven
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
Material in this manual is for information purposes only. The contents and the product it describes are subject to
change without notice. Thermo 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.
©2010 Thermo Fisher Scientific. All rights reserved.

Thermo Scientific Programmable Vacuum Oven 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.
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 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
products will be available at www.thermofisher.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 Programmable Vacuum Oven
Preface
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Programmable Vacuum Oven vThermo Scientific
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Accelerated Heatup Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
In a Purged Atmosphere . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
In a Vacuum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
In a Static Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Temp Controller and Heating Element Replacement . . . . . . . . . . . . .5-1
Seal Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Replacement Parts/ Accessory Items . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Electrical Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7

Programmable Vacuum Oven 1-1Thermo Scientific
Section 1 Introduction
The Hi-Temp Programmable Vacuum Oven is a multi-purpose unit that
operates under reduced pressures and/or inert atmospheres. Intended for
both low and high temperature applications, it features a 304 stainless-steel
work chamber, which resists contamination and corrosion from chemically
active vapors, and a dual-electronic control system, the Safety Sentinel,
which automatically protects samples from overheating.
To achieve temperature uniformity, sheath heaters completely cover the
top, bottom and sides of the oven chamber. Moreover, four-inch-thick
fiberglass insulation surrounds the chamber and heater assemblies.
For operational convenience, all controls and indicators are located on the
front panel. In addition to a power switch and three indicators, one to
show power, one to indicate when the heaters are energized and one to
indicate when the primary temperature control has failed - these include
purge gas and vacuum control valves, a 0-to-30-inch vacuum gauge and a
temperature control. The door is equipped with a full-length, low
temperature handle and a large observation window to assure safe sample
loading and viewing, even at high temperatures. There is also a positive-
action cam-type lock that holds the door tightly against the oven seal. The
rear panel contains gas and vacuum system connectors, and the chamber
contains a thermometer and two removable shelves.
The Vacuum Oven can fulfill practically every need associated with general
drying, conditioning, curing, desiccating, and annealing – as well as
moisture tests. When compared with conventional ovens, samples dry
faster at lower temperatures, and heat-sensitive materials dry safely without
degradation problems.

Programmable Vacuum Oven 2-1Thermo Scientific
Section 2 General Specifications
Performance Characteristics
Power Requirements:
Cat. No. 3625A . . . . . . . .120V, 50/60 Hz, 8.5A
Cat. No. 3625A-1 . . . . . .240V, 50/60 Hz, 4.2A
Power Input: . . . . . . . . . . . . . . . . . . .1000W max.
Temperature Range: . . . . . . . . .Ambient to 280°C
Control Sensitivity: . . . . . . . . . . . . . . . . . . .±1.0°C
Constancy: . . . . . . . .±1.0°C (at ultimate vacuum)
Safety Differential: . . . . . . . . . . . . . . . . . . .~5.0°C
Vacuum Range: . . . . . . . . .Atmosphere to 30” Hg
Pump-Down Time: . . . . . . . . . . . . . . . . . .6 Min*
Vacuum Leak Rate: . . . . . .<0.5” Hg per 24 hours
Physical Data
Overall Dimensions: . . . . .22¾H x 17¾D x 18W
Chamber Dimensions: . . .9¾H x 11½ D x 9¾W
Chamber Capacity: . . . . . . . . . . . . .0.65 cubic feet
Shelf and Floor Area: . . . . . . . . .313 square inches
Shipping Weight: . . . . . . . . . . . . . . . . . . . .~90 lbs.
*Using a single-stage mechanical vacuum pump with a free air capacity of 35
liters per 1 minute.
Approximate Dial Settings in Static Air
Dial Setting Temperature
2 25°C
4 55°C
6 85°C
8 115°C
10 145°C
12 180°C
14 210°C
16 240°C
18 275°C