Eigenschaften
Range at maximum test voltage	20 GΩ
50 V	(UN/5) GΩ
100 V	20 kΩ - 20 GΩ
Test current / resolution	0,01 µA - 39,99 µA / 10 nA ; 40,0 - 399,9 µA / 100 nA 0,400 - 2,000 mA / 1 µA
Discharge time (at 25 V)	< 2 s/µF
Communication	-
Dimensions / Weight / IP rating	211 x 108 x 60 mm / 850 g / IP 54 / IK 04

The Chauvin Arnoux CA 6536 is a digital insulation and continuity tester, specifically designed for measuring insulation resistances up to 20 GΩ. The device is particularly suitable for special applications such as in aerospace and defense technology, where precise and controlled test voltage is required. The test voltage is adjustable in 1-V steps from 10 V to 100 V, providing high flexibility for insulation testing. Measurements are performed in accordance with IEC 61557-2, exceeding the minimum requirement of 2 GΩ. The maximum test voltage of 100 V enables testing of insulation resistances in the range of 20 kΩ to 20 GΩ, with accuracy of ± (3 % + 2 pts). The test voltage is specified with an accuracy of ± 0.5 V (at I < 1 mA) and the test voltage display with ± (3 % + 3 pts).

Applications include maintenance and testing of electrical installations, particularly in demanding environments where high safety and reliability are required. The device is suitable for use in industry, telecommunications, and electronics, with the special adjustability of test voltage also being relevant for sensitive systems such as ESD installations. Continuity testing is performed in accordance with IEC 61557 with a test current of 200 mA or 20 mA, where the 20-mA mode enables longer battery life. Measurements are carried out with an accuracy of ± (10 % + 3 pts) and support norm-compliant testing of continuities in the range of 0.00 Ω to 10.00 Ω (at 200 mA) and 0.0 Ω to 100.0 Ω (at 20 mA). Line compensation up to 9.99 Ω ensures high measurement accuracy, especially with longer test leads.

Functions and equipment in detail include multiple operating modes: manual, continuous, and timer. The timer can be set to values from 0:00 to 39:59, enabling time-controlled testing. The display consists of a dual digital display with 4,000 points each, supplemented by a logarithmic bargraph that visually represents the insulation resistance. The display is backlit, improving readability in poorly lit environments. Additionally, a remote control probe is available, equipped with an integrated lamp to illuminate the test point and facilitate work in dark areas.

Technology explained simply shows that the device features automatic voltage shut-off, protecting against overloads and eliminating the risk of fuses blowing. Power supply is via six LR6 batteries (AA), with autonomy of 1,500 insulation measurements (at 5 s ON / 55 s OFF) and 3,000 continuity measurements. The automatic shut-off after 5 minutes is deactivatable. The measurement category is 600 V CAT IV, ensuring high safety when working on electrical installations. The housing complies with protection class IP54, which is dust- and splash-proof, as well as IK04, providing protection against mechanical impacts. Dimensions are 211 x 108 x 60 mm, weight 850 g.

Compatibility and accessories include various options that extend functionality. These include crocodile clips (alligator clips) 20 A CAT III 1000 V red+black, a probe for continuity testing, a remote control probe No. 3, test leads with 4 mm straight/angled plugs (1.5 m, 15 A, CAT IV, 1000 V, silicone, red + black), crocodile clips CAT IV-1000 V 15 A red+black, test probes with 4 mm socket CAT IV and CAT III 1000 V PVC red and black, and a carrying case. These accessories support application in various environments and increase the device’s flexibility.

Mounting and installation require no special measures, as the device is designed as a portable measuring instrument. The magnetic folding stand allows the device to be attached to metal surfaces, freeing both hands for the user during measurement. Operation is via a TEST button, which can also be operated with insulated protective gloves. Settings for test voltage, test current, timer, and alarm thresholds are programmable directly on the device.

Operational advantages lie in the high flexibility due to adjustable test voltage, robust construction, and ergonomic design. The integrated ΔREL function enables display of deviation from a previously stored reference value, making comparisons between measurements easy. Storage of up to 300 measurement values supports documentation and evaluation of tests. Multimeter functions include voltage measurement (TRMS & DC) up to 700 V, resistance up to 1000 kΩ, frequency up to 800 Hz, and capacitance up to 10 µF. Compliance with standards IEC 61557 parts 1, 2, 4, and 10, as well as IEC 61326-1 and IEC 61010-1/-2-030, ensures reliability and safety of the device.

Batteries are not included in the delivery scope.