Operating Instructions METRISO 1000A Insulation tester 3-348-773-37 8/5.
13 Attaching the Strap to the Housing 12 METRISO 1000A Housing R3 8 METRISO 1000A R2 8 R1 600 400 800 200 Ω MΩ Ω V 0 1000 V BATT 1000V 1000V 4Ω 1 2 3 4 5 6 7 8 2 x2 50V 3 2 x0,5 x1 100V R3 1 x0,2 250V R2 7 x0,1 500V R1 5 4 6 Analog display Function selector switch Battery voltage indicator lamp Adjusting screw for mechanical zero adjustment Rotary knob for electrical zero adjustment Rotary switch for nominal voltage selection Studs for fastening the carrying strap Measu
Contents Page 1 Safety Precautions .......................................................................... 3 2 Applications .................................................................................... 4 3 Initial Start-Up ................................................................................ 4 3.1 3.2 3.3 3.4 3.5 3.5.1 Battery Installation ...........................................................................................4 Testing the Batteries .........................
2 Applications The METRISO 1000A insulation tester complies with DIN VDE 0413 “Regulations for Devices for the Testing of Protective Measures in Electrical Systems” Part 1: insulation testers, and Part 4: ohmmeters. It is suitable for the measurement of insulation resistance at voltage-free devices and systems with nominal voltages of up to 1000 V, as well as for testing resistance at earthing conductors, protective conductors and bonding conductors including their connections and terminals.
4 Measuring Direct and Alternating Voltage Direct voltages and sinusoidal alternating voltages with frequencies ranging from 40 to 200 Hz can be measured with this instrument. Needle deflection is always positive for direct voltage measurements regardless of polarity at the terminal connections. Alternating voltage is displayed as an RMS value. ➭ Set the function selector switch to the “1000 V” position. ➭ Make certain that the needle points to the “0” mark at the V scale in the idle state.
5.2 Evaluation of Measurement Values In order to assure that insulation resistance values do not fall below those required by DIN VDE regulations, insulation tester inherent deviation must be taken into consideration. Required minimum display values for insulation resistance which take maximum operational measurement deviation of the METRISO 1000A into consideration (under nominal conditions of use) can be determined with the following table.
Characteristic Values Measuring Function 1000 V Measuring Range 0 ... 1000 V Inherent Deviation Nominal Nominal / Measuring Voltage Measuring Open-Circuit at Reference Error 2) Voltage Uo 1) UN Current Conditions ± 2.5% 0 ... 40 kΩ R1, R2, R3 UN = 50 V 20 kΩ ... 1 MΩ ± 1.5% 40 kΩ ... 2 MΩ ± 1.5% 100 kΩ ... 5 MΩ 4Ω 1) 2) 900 kΩ — 1200 V continuous > 100 kΩ 1200 V max. 10 s > 200 kΩ 1200 V max. 10 s > 500 kΩ 1200 V max. 10 s > 1 MΩ 1200 V max. 10 s > 2 MΩ 1200 V max.
Reference Conditions Positioning Temperature Relative Humidity Measured Quantity Frequency Measured Quantity Waveshape Deviation between Effective and Rectified Values Battery Voltage horizontal +23 °C ± 2K 45 ... 55% 45 ... 65 Hz Making Capacity for the Measurement of Insulation Resistance Electronic voltage limiting prevents voltage at the device under test from substantially exceeding nominal voltage during the making operation (see following characteristic curve). Ux Ux [V] [V] 600 < 0.5% 9 V ± 0.
8.1 Batteries The condition of the batteries should be checked from time to time. A dead or deteriorating battery must be removed from the battery compartment. If battery leakage occurs, electrolyte must be completely removed from the instrument and the batteries must be replaced. The batteries must also be replaced if the red lamp at the left-hand portion of the scale area lights up during the battery test described in chapter 3.2 on page 4. Replace batteries as described in chapter 3.1 on page 4.
8.5 Carrying Bag The measuring instrument can be securely fixed in the bag by pulling the carrying strap of the instrument through the internal studs situated on the right and left of the housing. The studs can be released for this purpose on one side by pressing the silver push-buttons. The flap of the bag serves as a place for keeping documents, or else, for example, as a writing pad (see Figure 1).
