KNC Model 3603-A, 3604-A, and 3605-A Thermo Units
Product Overview
The Model 3603-A, 3604-A, and 3605-A Thermo Units by King Nutronics Corporation are highly accurate dry
well temperature standards designed for testing and calibrating a broad range of thermometers, temperature
sensors, thermocouples, RTDs, and temperature switches used in military and industrial applications.
Conforming to rigorous U.S. Military specifications, King Nutronics Thermo Units are manufactured in three
versions covering the temperature ranges most frequently encountered in field and laboratory settings.
During use, devices to be tested or calibrated are inserted into the dry well of the unit, which is heated or
cooled (Model 3605-A only) to the temperature specified by the operator. Close-fitting dry well adapter chucks
maximize thermal transfer to the unit under test and minimize the time required for the specified temperature
to be reached. Adapter chucks are available for most industrial applications and in sizes conforming to
specific U.S. Navy requirements.
All King Nutronics Thermo Units are microprocessor-driven for maximum safety and simplicity of operation.
Housed in rugged aluminum carrying cases with storage for additional adapter chucks and accessories, King
Nutronics Thermo Units can withstand hard use in workshop, hangar, flight line, shipboard and submarine
environments. Like all King Nutronics Instruments, each Thermo Unit can be easily serviced and calibrated in
the field, and includes a comprehensive technical manual containing complete troubleshooting and repair
instructions, and an illustrated parts breakdown.
The design, operational details, and features of the King Nutronics Model 3603-A, 3604-A, and 3605-A
Thermo Units are protected by the following U.S. Patents: 3,699,800; 3,738,174; 3,939,687; 4,075,882;
4,079,618; 4,901,257.
Model 3603-A Thermo Unit (100°F to 600°F)
Smallest of the Thermo Units manufactured by King Nutronics
Corporation, the Model 3603-A is an easy to use self-contained
instrument designed to generate, control, measure, and display
temperatures from 100°F to 600°F, with an accuracy of ±0.5°F
throughout its operating range. The Model 3603-A thermo unit
weighs only 12.5 lbs., and is housed in a rugged, compact 11” x 7” x
10” aluminum case, making for easy transport to remote job sites.
A simple ON/OFF switch and a push-button temperature selector
control all functions. The measured temperature and other status
information is shown on the 16-character digital display.
Four adapter chucks are furnished with the Model 3603-A in the
following bore diameters: 1/4", 3/8”, 7/16”, and 9/16”. Other bore
diameters are available upon request.
Model 3604-A Thermo Unit (100°F to 1200°F)
The Model 3604-A Thermo Unit by King Nutronics
Corporation is a self-contained portable dry well
temperature calibration system designed to generate,
control, measure, and display temperatures from 100°F to
1,200°F, with an accuracy exceeding ±0.15% or ±0.8°F of
the setpoint value, whichever is greater, throughout its
operating range.
Incorporating an IEEE-488/GPIB bus, the Model 3604-A
Thermo Unit can be operated from a remote terminal using
simple commands, or via the user-friendly front panel
keypad and display. A convenient built-in dot-matrix printer
generates hard copies of test and calibration data.
Two configurations of the Model 3604-A Thermo Unit are available. Part No. 3604A-1-1 includes four adapter
chucks in the following bore diameters: 1/4", 3/8”, 7/16”, and 9/16”.
Part No. 3604A-1-101 includes 12 adapter chucks conforming to specific U.S. Navy requirements.
Compartments in the carrying case permit up to a dozen adapter chucks to be stored and transported with the
instrument.
Each Model 3604-A Thermo Unit also includes an accessory kit containing a dial caliper, a continuity tester,
adapter chuck handling tools, an adapter chuck for standard glass thermometers, and an assortment of spare
parts. All accessories and parts are stored in the case lid for convenience.
Model 3605-A Thermo Unit (-40°F to 250°F)
The Model 3605-A Thermo Unit by King Nutronics Corporation
is a self-contained portable dry well temperature calibration
system based on a Peltier element, which permits the
generation and control of temperatures from –40°F to 250°F,
with an unsurpassed accuracy of ±0.5°F throughout its
operating range.
Incorporating an IEEE-488/GPIB bus, the Model 3605-A
Thermo Unit can be operated from a remote terminal using
simple commands, or via the user-friendly front panel keypad
and display. A convenient built-in dot-matrix printer generates
hard copies of test and calibration data.
Two configurations of the Model 3605-A Thermo Unit are available. Part No. 3605A-1-1 includes four adapter
chucks in the following bore diameters: 1/4", 3/8”, 7/16”, and 9/16”. Part No. 3605A-1-101 includes 12 adapter
chucks conforming to specific U.S. Navy requirements. Compartments in the carrying case permit up to a
dozen adapter chucks to be stored and transported with the instrument.
Each Model 3605-A Thermo Unit also includes an accessory kit containing a dial caliper, a continuity tester,
adapter chuck handling tools, an adapter chuck for standard glass thermometers, and an assortment of spare
parts. All accessories and parts are stored in the case lid for convenience.
Performance Specifications
Characteristics Specifications
Model No. 3603-A 3604-A 3605-A
Temperature range
Accuracy
Resolution:
Test mode
Calibration
Setpoint stability
Stabilization time
Well uniformity
1
100°F below ambient temperature
100°F to 600°F
(38°C to 315°C)
±0.5°F
throughout range
0.1°
0.01°
±0.15°F ±0.15°F ±0.15°F
14 min. max, 75°F to 300°F
23 min. max, 75°F to 600°F
±0.3°F ±0.5°F ±0.5°F
100°F to 1,200°F
(38°C to 649°C)
±0.8°F from 100°F to 600°F
±0.15% of setpoint
> 600°F
0.1°
0.01°
30 min. max for a 1,100°F
change from ambient temp.
-40°F to 250°F
(-40°C to 121°C)
±0.5°F
throughout range
0.1°
0.01°
30 min. max for a 60°F
change from ambient temp.
1
General Specifications
Characteristics Specifications
Model No. 3603-A 3604-A 3605-A
Ambient temp. range:
Operational
Storage
Readout units
Well size
Case construction
Case dimensions
(L x W x H)
Weight:
Industrial model
USN model
Input power:
Voltage
Current
Fuse(s)
Fahrenheit (°F) or
1 “ I.D. x 6” deep 1 “ I.D. x 6” deep 1 “ I.D. x 6” deep
Deep drawn aluminum Deep drawn aluminum Deep drawn aluminum
115 VAC, 50-60 Hz
32°F to 120°F
-67°F to 167°F
Fahrenheit (°F) or
Celsius (°C)
11” x 7” x 10” 18” x 11” x 14” 18” x 11” x 14”
12.5 lbs.
N/A
115 VAC, 50-60 Hz
3.5 Amps
5 Amps
32°F to 120°F
-67°F to 167°F
Celsius (°C)
35 lbs.
44 lbs.
9.0 Amps
10 Amps
32°F to 120°F
-67°F to 167°F
Fahrenheit (°F) or
Celsius (°C)
35 lbs.
44 lbs.
115 VAC, 50-60Hz
5.0 Amps
1 Amp and 5 Amps
Functional Features
Characteristics Specifications
Model No. 3603-A 3604-A 3605-A
Display:
No. of characters
Type
Keypad
Printer
Remote interface
Updated 5/22/2013
5 x 7 alphanumeric
dot-matrix, vacuum-
fluorescent type
16
5 x 7 alphanumeric
dot-matrix, vacuum-
fluorescent type
N/A 16-key, touch sensitive 16-key, touch sensitive
N/A 24 character dot-matrix
impact printer with
replaceable ribbon cartridge
and standard adding
machine paper
N/A IEEE-STD-488-1978 GPIB IEEE-STD-488-1978 GPIB
40
5 x 7 alphanumeric
dot-matrix, vacuum-
fluorescent type
24 character dot-matrix
impact printer with
replaceable ribbon cartridge
and standard adding
machine paper
40
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