Operating instructions ISO-Kalibrator 1 Calibration tester for insulation meters and low-ohmic measuring instruments 14206 6/1.
Contents 1 Page Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Safety features and safety precautions . . . . . . . . . . . . . . . . . 3 2.1 Meaning of the symbols on the unit . . . . . . . . . . . . . . . . . . . . . . 5 3 How to test insulation meters . . . . . . . . . . . . . . . . . . . . . . . . 6 4 How to test measuring instruments for low-ohmic resistances . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5 Specifications . . . . . . .
1 Applications Using the tester ISO-Kalibrator 1, you can quickly and rationally test measuring instruments for insulation resistances and low-ohmic resistances for their functionality and accuracy, and thus ensure their proper function. This way, you can assure that the measured values determined with such resistance measuring instruments and confirmed by you, actually correspond to the true resistance value, taking into account the tolerances of such measuring instruments.
! ! Caution! The tester must not be used as load resistor for measuring and test instruments other than those mentioned here. By no means must the unit be used in electrical systems! Caution! For technical reasons, the ISO-Kalibrator 1 does not contain protecting devices against overcurrent or excessive temperature.
The tester must not be used: • • • • • When the case is open When there are obvious signs of damage on the exterior When it no longer functions correctly When the safety sockets are damaged After severe stress that is, exceeding of the load limits given under Specifications • After severe transportation stress • After prolonged storage under adverse conditions (e.g. moisture, dust, temperature) 2.
3 How to test insulation meters The ISO-Kalibrator 1 permits testing of insulation meters having a nominal voltage up to 1000 V. The test range extends from 100 k to 100 M. ! Caution! To assure the safety of both the user and the unit, do not on any account apply a test voltage of more than 1000 V to ground to the sockets of the unit. The load limits of the test resistors given in section 5, Specifications, must on no account be exceeded.
6) Check that the displayed value corresponds to that set on the ISO-Kalibrator 1, taking into account the tolerances of the insulation meter. In critical cases, you should use the true value listed in the test protocol of your ISO-Kalibrator 1 as comparison value. 7) Conclude the measurement and put the ISO-Kalibrator 1 into an electrically dead condition. 8) You now can select another test resistor and start a new measurement, or disconnect the insulation meter from the ISO-Kalibrator 1.
4 How to test measuring instruments for low-ohmic resistances The ISO-Kalibrator 1 permits ohmmeters for low-ohmic resistances to be tested for their function and accuracy. Two precision resistors are available for instruments with a measuring current of less than 1.
To test your ohmmeter, proceed as follows: 1 Connect the two probes of your measuring instrument to the test sockets B1 and B2 (blue and black socket), if you whish to select the 1 resistor. 2) Connect the two probes of your measuring instrument to the test sockets B3 and B4 (blue and black socket), if you whish to select the 50 m resistor. 3) On your ohmmeter, select the desired measuring range according to the operating instructions of your ohmmeter. 4) Perform the resistance test.
Note The resistance values given in the resistance symbols of the ISO-Kalibrator 1 are referred to a fourterminal resistance measurement immediately at the B1/B2 safety sockets and/or the B3/B4 safety sockets with gold-plated 4 mm laboratory plugs.
5 Specifications 5.1 Measuring resistors for testing insulation meters Characteristic features and load limits Resistance value Tolerance / TC Dielectric strength max. Current loading capacity max. 100 k 0.5 % / 50 ppm 250 V 2.5 mA 250 k 0.5 % / 50 ppm 500 V 2.0 mA 500 k 0.5 % / 50 ppm 1000 V 2.0 mA 1 M 0.5 % / 50 ppm 1200 V 1.2 mA 2 M 0.5 % / 50 ppm 1200 V 0.6 mA 5 M 0.5 % / 50 ppm 1200 V 0.24 mA 10 M 0.5 % / 50 ppm 1200 V 0.12 mA 20 M 1.0 % / 50 ppm 1200 V 0.
! 5.3 Caution! The unit has no protecting means against overcurrent or excessive temperature. By all means, take care not to exceed the load limits of the instrument as this could cause damage to the instrument or impair its accuracy. Nominal range of use Nominal voltage (insulation resistance) Nominal current (low-ohmic resistance) Waveform AC Frequency AC Temperature range 5.4 –10 C ... +50 C –20 C ...
5.6 Mechanical configuration Degrees of protection Dimensions Weight 6 6.1 Case: IP 50 Sockets: IP 20 122 mm x 60 mm x 53 mm (L x W x H) 0.13 kg Maintenance Case Special maintenance of the case is not required. Take care that the surface is clean. Use a slightly moist cloth for cleaning. Do not use solvents, detergents and scouring agents. 6.
8 Repair and Replacement Parts Service Calibration Center * and Rental Instrument Service When you need service, please contact: GMC-I Service GmbH Service Center Thomas-Mann-Strasse 20 90471 Nürnberg • Germany Phone +49 911 817718-0 Fax +49 911 817718-253 E-Mail service@gossenmetrawatt.com www.gmci-service.com This address is only valid in Germany. Please contact our representatives or subsidiaries for service in other countries.
