Precision
Decade Resistor
GenRad 1433 Series
The 1433 Decade Resistors are convenient
resistance standards for checking the accuracy
of resistance-measuring devices. They are pri-
marily intended for precision-measurement
applica ons where accuracy, stability, and
low-zero-resistance are important. They are
used as components in dc and audio frequen-
cy impedance bridges.
Features:
• Resistance range from 1 mΩ to 111 MΩ
• High accuracy: 0.01% up to 10 MΩ
• Low temperature coefficient
• Good frequency characteris cs
• Excellent stability
• Low zero resistance
• Rack mount op on available
See also:
Page 1 of 2
Model
1433
Precision Decade Resistor
• Higher accuracy:
HARS-LX Series
• Higher power:
HPRS Series
• Higher resistance:
HRRS Series
• Higher voltage:
HRRS-5kV
and
HRRS-10kV Series
• RTD simulators:
RTD Series
• Programmable models:
PRS Series
SPECIFICATIONS
Resistance
per step
1 mΩ
10 mΩ
100 mΩ
1
Ω
10
Ω
100
Ω
1 kΩ
10 kΩ
100 kΩ
1 MΩ
10 MΩ
Total decade
resistance
10 mΩ
100 mΩ
1
Ω
10
Ω
100
Ω
1 kΩ
10 kΩ
100 kΩ
1 MΩ
10 MΩ
100 MΩ
Max current
8.0 A
4.0 A
1.6 A
0.8 A
0.25 A
80 mA
23 mA
7 mA
2.3 mA*
0.7 mA*
0.1 mA*
Max voltage
(per step)
5 mV
40 mV
0.16 V
0.8 V
2.5 V
8V
23 V
70 V
230 V*
700 V*
1000 V*
Max power
(per step)
0.04 W
0.16 W
0.25 W
0.6 W
0.6 W
0.6 W
0.5 W
0.5 W
0.5 W*
0.5 W*
0.1 W*
Stability Long-term stability
(±ppm/yr)
(±ppm/3 yrs)
50
50
50
20
20
20
20
20
20
20
50
75
75
75
25
25
25
25
25
25
25
100
Temperature
coefficient
(±ppm/°C)
50
20
20
20
15
5
5
5
5
5
10
Resistor type
Resistance wire
Wirewound, non-
inductive
Metal oxide film
*Subject to maximum of 2000 V to case
Accuracy:
≤1
MΩ decades:
±(0.01% + 2 mΩ)
10 MΩ decades:
±0.03%
after subtraction of zero resistance, at 23°C;
traceable to SI
Zero resistance:
≤1
MΩ decades:
<1 mΩ per decade at dc
10 MΩ decade:
≈3
mΩ at dc
Max voltage to case:
2000 V peak
Terminals:
Gold-plated, 5-way, tellurium-copper
binding posts with low thermal emf and low
resistance. Rear outputs are available as an
option.
Connection to units:
3 binding posts, labeled
HI, LO,
and
GND
-K Option: Kelvin connection is available
as an option with 5 binding posts, labeled
HI CURRENT, HI SENSE, LO SENSE, LO
CURRENT,
and
GND
Switch capacitance:
<1 pF between contacts
Environmental conditions:
Operating:
10°C to 40°C
Storage:
-40°C to 70°C
Humidity:
< 80% RH
Zero Inductance (Lo):
0. 1
μH/decade
+ 0.2
μH
Typical Value of Zero Impedance:
Zero Resistance (Ro):
<0.001
Ω/decade
at dc
0.04
Ω/decade
at 1 MHz
Proportional to square root of frequency
above 100 kHz
Switches:
Continuous rotation
11 positions marked "0"-"10"
Multiple solid silver-alloy contacts
Supplied with unit:
Instruction manual
Calibration Certificate
IET LABS, INC.
in the
GenRad
Tradition
Long Island, NY
www.ietlabs.com
TEL: (516) 334-5959 • EMAIL: info@ietlabs.com
1433 Datasheet November 2014
Precision
Decade Resistor
GenRad 1433 Series
MECHANICAL SPECIFICATIONS
Model
3 decade
4-5 decade
6-7 decades
8-9 decades
10-11 decades
Dimensions
31 cm W x 8.9 cm H x 10.2 cm D
(12.2" x 3.5" x 4")
37.6 cm W x 8.9 cm H x 10.2 cm D
(14.8" x 3.5" x 4")
43.9 cm W x 8.9 cm H x 10.2 cm D
(17.3" x 3.5" x 4")
48.3 cm W x 17.8 cm H x 17.8 cm D
(19" x 7" x 7")
Page 2 of 2
Weight
1.7 kg (3.8 lb)
2.0 kg (4.3 lb)
2.4 kg (5.3 lb)
3.5 kg (7.7 lb)
3.7 kg (8.1 lb)
ORDERING INFORMATION
Number of
Resolution
decades
3
4
4
4
4
4
4
4
5
5
5
5
5
5
6
6
6
6
6
6
0.001
Ω
0.01
Ω
0.1
Ω
1
Ω
10
Ω
100
Ω
1 kΩ
10 kΩ
0.01
Ω
0.1
Ω
1
Ω
10
Ω
100
Ω
1 kΩ
0.001
Ω
0.01
Ω
0.1
Ω
1
Ω
10
Ω
100
Ω
1433-W
1433-X
1433-B
1433-Z
1433-T
1433-N
1433-M
1433-P
1433-Y
1433-U
1433-K
1433-J
1433-L
1433-Q
Model
1433-01
1433-00
1433-02
1433-04
1433-06
1433-08
1433-09
1433-09A
1433-10
1433-12
1433-14
1433-16
1433-18
1433-18A
1433-19
1433-20
1433-22
1433-24
1433-26
1433-27
Total resistance
1.11
Ω
111.1
Ω
1.111 kΩ
11.11 k
Ω
111.1 k
Ω
1.111 MΩ
11.11 MΩ
111.1 MΩ
1.1111 kΩ
11.111 kΩ
111.11 kΩ
1.1111 M
Ω
11.111 MΩ
111.11 MΩ
1.111 11 kΩ
11.1111 kΩ
111.111 kΩ
1.111 11 MΩ
11.1111 MΩ
111.111 MΩ
Historic GR
model numbers
Model
1433-28
1433-29
1433-31
1433-33
1433-34
1433-35
1433-36
1433-37
1433-38
1433-39
1433-39A
1433-39B
1433-40A
1433-40
1433-41
Total resistance
11.111 11 kΩ
111.1111 k
Ω
1.111 111 MΩ
11.111 11 MΩ
111.1111 MΩ
111.111 11 kΩ
1.111 111 1 MΩ
11.111 111 MΩ
111.111 11 MΩ
1.111 111 11 MΩ
11.111 111 1 MΩ
111.111 111 MΩ
11.111 111 11 MΩ
111.111 111 1 MΩ
111.111 111 11 MΩ
Number of
Resolution
decades
7
7
7
7
7
8
8
8
8
9
9
9
10
10
11
0.001
Ω
0.01
Ω
0.1
Ω
1
Ω
10
Ω
0.001
Ω
0.01
Ω
0.1
Ω
1
Ω
0.001
Ω
0.01
Ω
0.1
Ω
0.001
Ω
0.01
Ω
0.001
Ω
Historic GR
model numbers
1433-F
1433-G
1433-H
Options:
1433-50:
Rack Mount Kit (4-dial)
1433-51:
Rack Mount Kit (5-dial)
1433-52:
Rack Mount Kit (6 and 7-dial)
1433-XX-RO:
Rear output binding posts
1433-XX-K:
Kelvin-type 4-terminal posts and GND
IET LABS, INC.
in the
GenRad
Tradition
Long Island, NY
www.ietlabs.com
TEL: (516) 334-5959 • EMAIL: info@ietlabs.com
1433 Datasheet November 2014
