RK-45. Digital Single Sheet Tester. Operation Manual GOPAL ELECTRONICS. 50 & 60 Hz Source & Measure. Accurate testing of single sheet. Knee

Transcription

1 GOPAL ELECTRONICS RK-45 Digital Single Sheet Tester Accurate testing of single sheet 50 & 60 Hz Source & Measure Knee Induction in Tesla Accurate testing from 0.5 Tesla to saturation Knee Operation Manual 1

2 Chapter 1 Congratulation and thanking you for purchasing Gopal make Digital Single Sheet Tester RK-45 is an advance tool for magnetic measurement. Please read manual thoroughly before operating instrument. 1.1 RK-45 [1] ON OFF Switch [2] LCD Display [3] Back Light Control [4] Induction Setting [5] Thickness Setting [6] Probe Connection [7] Frequency setting Probe Fig. 2 Primary \ Source Probe Probe connection socket Probe s core 1.3 Standard Accessories Fig. 3 Probe Probe connection wire Mains cord Standard test sample 2

3 Chapter Introduction This is most comfortable Instrument to test electrical steel sheet at site. Due to advance digital technology it became feasible to make it portable and light weight tool, for testing of CRGO, CRNO, CRNGO and semi process sheet. While measuring iron loss (Watt/Kg), standard size of 30 x 70 mm single strip to be tested, and if more accuracy required more sample to be averaged. most of E&I, Motor stamping can be tested if covered probe core area. There is no need to cut sample of specific size. It is also used to find rolling direction of CRGO sheet by rotating probe on sample. RK-45 is a handy tool and very useful for manufacturer of Electrical items like Transformer, Motor, Stamping, Lamination and core. 2.2 Operation Theory RK-45 is provided with a stroboscopic probe when placed on specimen closes the magnetic path between probe and specimen. Probe has two coils one is primary and second is secondary (like transformer). When power applied to primary coil and detected by secondary coil appropriate to specimen data and measure voltage, current and power. Then measured data calculated by micro controller appropriate to specimen's data (core area and weight) and directly displayed on LCD Watt/Kg. 2.3 Specification GENERAL SPECIFICATION Power Supply (Universal input ) AC 110 V / 230 V- / 50/60 Hz / 10 VA % Source capacity 1.8 Tesla Frequency range 50 and 60 Hz Magnetic flux density range 0.5 to 1.8 Tesla ( Weber per squire meter ) Sample Thickness range 0.1 mm to 0.7 mm to be test ESTIMATED WEIGHT AND DIMENSION Dimension of main unit Dimension of probe Weight of main unit Weight of probe Dimension of packing box Weight with packing 82H X 250W X 228L mm 62 mm Round aluminum housing kg without wire kg without wire 380 x 400 x 245 mm may be change 3.65 kg (Maximum 5kg) ACCURACY Induction Resolution 0.1 Tesla Accuracy of Induction 0.8 to 1.5 Tesla = ± Accuracy of Induction 1.6 to 1.8 Tesla = ± Accuracy of Induction 0.5 to 0.7 Tesla = ± Additional Impact on From 0.1 to 0.18 mm ± 0.05% induction by Thickness From 0.19 to 0.50 mm ± 0.01% setting From 0.51 to 0.70 mm ± 0.04% Frequency ± Hz ( to be set 50 and 60 Hz ) Sine Wave ± 3% Distortions Including 16th Harmonic Thickness Setting ± 0.01 mm (Setting Resolution 0.01mm) ± 3.0 % W/kg + Induction errors when testing Watt/kg (Iron Loss) sample of 0.20 to 0.55 mm 1 to 1.8 Tesla, When testing Standard Specimen. Estimated only without assurance SPECIMEN Standard Specimen size 30 x 70 mm Non Standard Specimen size More than 12 x 40 mm Specimen thickness range 0.1 to 0.7mm for best accuracy Type of specimen CRGO, CRNO, HR AND ELECTRICAL STEEL STANDARD ACCESSORIES WITH MAIN UNIT PROBE = 1 PROBE CONNECTION WIRE = 1 POWER CONNECTION WIRE 230V TYPE = 1 STANDARD SAMPLE = 1 TEST REPORT = 1 3

4 2.4 Precaution [1] Voltage supply should be within (90 to 50/60Hz) [2] Warm up the instrument at least 30 minutes. [3] Please do not turn On and Off instantly (Duration should be at least 1 minute). Otherwise It hang up the equipment. [4] Magnetic material should be keep away from the probe. [5] Please do not open the instrument some critical component inside may be damage. 2.5 Measuring Instruction [1] Specimen should be 30 mm wide and 70 mm long for specific accuracy. [2] The specimen should be demagnetized before test. [3] CRGO is more sensitive for magnetization so it is required to demagnetize and annealing the specimen before test. [4] Measurement should be on single sheet, never on multiple (stacked) sheets. [5] Keep magnetic material away from the probe during the test perform. [6] Keep clean surface of probe s core, rusty surface can create an error. [7] Make sure that you have properly placed the probe on specimen as standard method [8] Specimen should not be deformed or mechanically stressed. Mechanical stress can change the watt loss of the specimen. In that condition single sheet tester always show the actual loss of the specimen. [9]Specimen of critical material like CRGO should handle with care. [10] Please enter correct thickness, Induction. [11]Error in feeding parameter is directly proportional to error in Watt/Kg. [12] Please recheck the data you have entered on LCD before test. 4

5 Chapte Demagnetizing Test the specimen at high induction two time to demagnetize the specimen for specific accuracy before your test. 3.2 Non oriented sheet measurement Watt loss value guaranteed by manufacturers is usually mean value calculated from those measured both in rolling direction and cross rolling direction of the sheet. Hence, it is recommended to measure the value in the same way and calculated the mean value. 3.3 Grain oriented sheet measurement Watt loss value guaranteed by manufacturers are usually mean value calculated from those measurement only in the rolling direction. Hence, it is recommended to measure the value only in the rolling direction. Comparison Fig. 4 5

6 3.5 Function of LCD When press T-up and T-down key momentary the thickness will be up and down accordingly and when press continue for more than 3 second the associated value will be fast updated. When press B-up and B-down key momentary the Induction will be up and down accordingly and when press continue for more than 3 second the associated value will be fast updated. Frequency Thickness Induction 50 Hz T. 23 B 1.5 Watt per Kg. Fig W/Kg 0001 Fig. 6 Serial Number AUTOMATIC SAMPLE DETECTION When probe connected but sample not place this indicate please place sample 50 Hz T. 23 B 1.5 SAMPLE-? 0001 Fig. 7 AUTOMATIC PROBE DETECTION When probe not connected it indicate please connect 50 Hz T. 23 B 1.5 PROBE-? 0001 Fig. 8 AUTOMATIC OVER LOAD DETECTION 50 Hz T. 23 B 1.5 SAMPLE-O 0001 When sample out of range this indicate over load 6

7 4.2 STEP BY STEP PROCEDURE FOR TESTING IN DIMENSION MODE [1] Give the supply of (90V to 50/60Hz) by mains cord to the instrument. [2] Connect the Probe to the instrument by probe connection wire. [3] Keep clean the surface of probe s core. [4] Warm up the instrument at least 30 minutes for specified accuracy. [5] Put probe on the specimen. Probe should be c entralize with the specimen. [6] Please set Thickness by press T Green color key. [7] Please set the Frequency (50Hz to 60 Hz) by press Hz Red color key. [8] Please set the Induction by press B Yellow color key. [9] Take the reading when display give stable readings. 3.6 STANDARD METHOD TO PLACE THE PROBE Place approximately 2 kg non ferrous weight on probe so that the core surface properly interact with specimen 7

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