Martindale CB12 Calibration Box

This calibration check box allows you to check the calibration of insulation and continuity testers.

EAN: 5036162185878 SKU: MARCB12 Category: Tags: ,

This product has been discontinued. You may be interested in:

Martindale PD440SX – 440V AC Proving Unit with 4 ranges and CALCHECK


The CB12 is a portable check box for checking the resistance and continuity ranges of multimeters, insulation testers, multifunction clamp meters and test instruments which use resistance as part of their measurement capability. This check box provides a quick method of verifying that a test instrument is giving accurate readings between annual calibration.

It is simple to use and is designed to be a quick check device for workshop and site use. Connect the instrument under test via the 4mm terminals on the front of the check box. Select a resistance value using the rotary dial and set the instrument under test to the relevant test range. The values can be checked or an insulation test can be performed to check that the values are within the appropriate limits.



Resistance settings 0.5Ω, 1Ω, 2Ω, 20Ω, 200Ω, 1kΩ, 10kΩ, 20kΩ, 100kΩ, 1MΩ, 2MΩ, 10MΩ
Accuracy 0.5Ω-2Ω ± 0.025Ω

20Ω-10MΩ ± 2%

Maximum voltage input 1000V DC
Case Impact Resistant ABS
Weight 280g
Dimensions 150 x 70 x 55mm
Verification certificate Included





This product has been discontinued.

Out of stock