Contents
p. 2
Applic.
pp. 3-6
Selection
pp. 7-8
Products
pp. 9-49
Index
p. 51
Free Offer
p. 52 High Accuracy Decade
Resistance Substituter
HARS-X Series p. 1 of 2
Tight tolerance laboratory grade decade substi- Low temperature coefficient - 5 ppm/°C
tuters, for applications requiring a cost effective Noninductive or low inductance resistors
high performance resistance decade box.
Rack mounting available
Special and custom configurations available
Resistance from 1 m to 111 M (See HRRS Series for higher resistance)
Excellent stability - 10 ppm/yr, 25 ppm/ 3 yrs
Wide choice - single through 11 decade units
High accuracy - 0.01% (100 ppm)
Very low zero resistance: <1 m per decade
High performance solid silver alloy switches
6 Decade HARS-X High Accuracy Resistance Substituter
SPECIFICATIONS
Decade Resistance Stability Long Term Temperature Max. Maximum Maximum
Stability Coefficient Power current voltage
Resistance Per Step (±ppm/year) (±ppm/3 years) (±ppm/°C) (W/step) (per decade) (per step)
10 m 1 m 100 700 50 0.025 5A 5 mV
100 m 10 m 50 350 20 0.2 4.5 A 40 mV
1 100 m 30 50 20 0.25 1.6 A 0.16 V
10 1 10 25 20 0.6 0.8 A 0.8 V
100 10 10 25 15 0.6 0.25 A 2.5 V
1 k 100 10 25 5 0.6 80 mA 8V
10 k 1 k 10 25 5 0.5 23 mA 23 V
100 k 10 k 10 25 5 0.5 7 mA 70 V
1 M 100 k 10 25 5 0.5* 2.3* mA 230 V*
10 M 1 M 10 25 10 0.5* 0.7* mA 700 V*
100 M 10 M 25 40 10 0.1* 0.1* mA 1000 V*
*Subject to maximum of 2000 V.
Accuracy: ±(0.01% + 2 m) after subtraction of zero Mechanical:
resistance, at 23°C.
Model Dimensions Weight
Zero Resistance: <1 m per decade, at dc.
1 decade 7.7 cm W x 7.7 cm H x 8.4 cm D 0.45 kg
Maximum Voltage to Case: 2000 V peak. (3" x 3" x 3.3") (1.0 lb)
Switch Type: 11 positions; "0"-"10"; multiple solid silver alloy contacts. 2-4 decades 37.5 cm W x 8.9 cm H x 10.2 cm D 1.7 kg
Switch Capacitance: <4 pF per switch, low loss. (14.8" x 3.5" x 4") (3.8 lb)
Terminals: Low thermal emf beryllium copper binding posts with 5 decades 2.0 kg (4.3 lb)
standard 3/4 inch spacing plus shield terminal; connections from the
6 decades 43.9 cm W x 8.9 cm H x 10.2 cm D 2.2 kg
rear of the instrument are available with RO option. Solderable
terminals for single decade units. (17.3" x 3.5" x 4") (4.8 lb)
7 decades 2.4 kg (5.3 lb)
8 decades 2.6 kg (5.7 lb)
9 decades 48.3 cm W x 17.8 cm H x 19.7 cm D 5.1 kg
(19.0" x 7.0" x 7.8") (11.2 lb)
10 decades 5.3 kg (11.7 lb)
Electronic cat. clr CD/p11/08-05-99
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de