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Summary of Contents for Ega Master 51251
- Page 1 OPERATING INSTRUCTIONS INSULATION RESISTANCE MULTIMETER COD. 51251 GUARANTEE......23...
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Page 2: Safety Information
ENGLISH INSULATION RESISTANCE MULTIMETERS INTRODUCTION The code 51251 is a battery-powered, true RMS insulation multimeter (hereafter “the Meter”) with 6000 count display. THE METER MEASURES OR TESTS THE FOLLOWING: • AC/DC voltage and current • Resistance • Voltage and current frequency • Diode • Continuity •... -
Page 3: Unpacking Inspection
• Do not apply more than the rated voltage as marked on the Meter, between the terminals or between any terminal and earth ground. • Use caution with voltages above 33V ac rms, 46.7V ac Peak or 70V dc. These voltages pose a shock hazard. • Replace the battery as soon as the low battery indicatory ( ) appears. • Disconnect circuit power and discharge all high-voltage capacitors before testing resistance, continuity, diodes, or capacitance. • Do not use the Meter around explosive gas or vapor. • When using the test leads, keep your fingers behind the finger guards. • In order to comply with the safety standard, the Meter must be used along with the included test leads. Any damages of the test lead, must replace it with the same model number and specification. • Remove test leads from the Meter before opening the Meter case or battery door. Never operate the Meter with the cover removed or the battery door open. • Comply with local and national safety requirements when working in hazardous locations. • Under the influence of Radio-Frequency Electromagnetic Field & Conducted Radio-Frequency Electromagnetic Field phenomenon. The captioned model have a magnificent error in function measurement. It will be back to normal when the interference is removed. • Use proper protective equipment, as required by local or national authorities when working in hazardous areas. • Avoid working alone. • Use only the replacement fuse specified or the protection may be impaired. • Check the test leads for continuity before use. Do not use if the readings are high or noisy. -
Page 4: The Meter Structure
THE METER STRUCTURE Figure 1. The Meter Structure 1. Front Housing 2. LCD Display 3. Functional Buttons 4. Rotary Switch 5. Input Terminals ROTARY SWITCH POSITIONS Turn the Meter on by pressing the POWER button. Use the BLUE button to select any rotary switch alternate functions (labeled with blue letters). Rotary switch selections are shown in Figure 2 and described in Table 3. Figure 2. Rotary Switch... - Page 5 Table 3. Rotary Switch Selections Switch Position Measurement Function AC voltage from 60mV to 1000V DC voltage 1mV to 1000V DC mV 0.01mv to 600mV Temperature from -40°C to + 537°C (-40°C to +998°F). Celsius is the default code 51251 temperature measurement unit Ohms from 0.1 to 40M. Capacitance from 0.01 nF to 100 µF Continiuty test. Beeper turns on at <30 Diode test. There is no ranging in this function DC mA from 0.01mA to 600mA (600mA overload for 2 minutes maximum) AC mA from 3 mA to 600 mA (600 mA overload for 2 minutes maximum) Press to perform insulation test insulation From 0.1M to 2G. Select 50V, 100V, 250V, 500V and 1000V testing voltage BUTTONS Use the buttons to activate features that augment the function selected with the rotary switch. The buttons are shown in Figure 3 described in Table 4. Figure 3. Buttons Table 4. Buttons Button Description Press POWER to turn on the Meter...
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Page 6: Understanding The Display
• Press this button once to recall the stored value. Press or to recall the previous or next stored value. Press LOAD again to exit data recall mode. • Press and hold this button to recall the stored data continuously. Press LOAD again to LOAD exit. • After entering the Load mode, it is not allowed to turn the rotary switch to enter to measuring mode. You can only enter the measuring mode after exiting the Load mode. In Measurement mode, except buzzer, diode and insulation test, press to start retaining maximum value. In Load, each press to go back to the previous stored reading In Measurement mode, except buzzer, diode and insulation test, press to start retaining minimum value. In Load, each press to recall the next stored reading. In Insulation Test mode, press to select different testing voltage. RANGE In other mode, except buzzer and diode, press to change Ranging mode from Auto to Manual Ranging mode. Press and hold to return to Auto Ranging mode. SELECT Functions as a shift key. Press to access orange functions on the rotary switch. Initiates an insulation test when the rotary switch is on the INSULATION position. Causes the Meter to source (output) a high voltage and measure insulation resistance. InMeasurement mode, activate frequency measurement. UNDERSTANDING THE DISPLAY Display indicators are shown in Figure 4 and described in Table 5. Figure 4. Display indicators Table 5. Display Indicators Indicator Description Indicates maximum reading has been selected. Indicates minimum reading has been selected. -
Page 7: Making Basic Measurements
High voltage warning Auto Range Auto ranging mode Manual Range Manual ranging mode 61000mV Display range in use Negative symbol > Greater than symbol Primary display Data store symbol Data recall symbol The number of stored data When the number of stored data reaches 99, the display will show FULL. FULL When the number of stored data is full, press CLR to clear up the stored data before storing another set of data. Clear up the stored data Indicates a test lock will be applied the next time you press TEST on the Meter. The test lock acts to hold down the button until you press HOLD or TEST again. 2500V Source voltage rating for insulation test. 1000V 50V, 100V, 250V, 500V and 1000V ranges available. Secondary Display Measurement units MAKING BASIC MEASUREMENTS MEASURING AC VOLTAGE (see figure 5) Figure 5. - Page 8 Warning To avoid harm to you or damages to the Meter from electric shock, please do not attempt to measure voltages higher than 1000V although readings may be obtained. The AC Voltage ranges are: 6.000V, 60.00V, 600.0V and 1000V. If over the range, it displays “OL”. To measure AC voltage, connect the Meter as follows: 1. Insert the red test lead into the VΩ terminal and the black test lead into the COM terminal. 2. Set the rotary switch to 3. Connect the test leads across with the object being measured. The measured value shows on the display.
- Page 9 • In each range, the Meter has an input impedance of 10MΩ. This loading effect can cause measurement errors in high impedance circuits. If the circuit impedance is less than or equal to 10kΩ, the error is negligible (0.1% or less). • When DC voltage measurement has been completed, disconnect the connection between the testing leads and the circuit under test, and remove the testing leads away from the input terminals of the Meter. MEASURING DC MILLIVOLTS (see figure 7) Figure 7.Measuring DC Millivolts Warning To avoid harm to you or damages to the Meter from electric shock, please do not attempt to measure voltages higher than 500V, otherwise you cannot obtain correct reading. The DC Millivolts ranges are: 60.000mV and 600.0mV. If over the range, it displays “OL”. To measure DC Millivolts, connect the Meter as follows: 1. Insert the red test lead into the...
- Page 10 MEASURING RESISTANCE AND CAPACITANCE MEASURING RESISTANCE (see figure 8) Figure 8. Measuring Resistance Warning To avoid electric shock, injury, or damage to the Meter, disconnect circuit power and discharge all high-voltage capacitors before testing resistance. The Resistance ranges are 600.0Ω, 6.000kΩ, 60.00kΩ, 600.0kΩ, 6.000MΩ and 40.00MΩ To measure resistance, connect the Meter as follows: 1. Insert the red test lead into the terminal and the black test lead into the COM terminal. Set the rotary switch to Resistance measurement is default or press SELECT button to select Ω...
- Page 11 Warning To avoid electric shock, injury, or damage to the Meter, disconnect circuit power and discharge all high-voltage capacitors before testing capacitance. Use the DC Voltage function to confirm that the capacitor is discharged. The Capacitance ranges are 10.00nF, 100.0nF, 1000nF, 10.00µF and 100.0µF To measure capacitance, connect the Meter as follows: 1. Insert the red test lead or red short lead with alligator clip into the terminal and the black test lead or black short lead with alligator clip into the COM terminal. If the capacitor being tested has polarity, connect the positive into the terminal and the negative into the COM terminal Set the rotary switch to Press SELECT button to select capacitance measurement mode...
- Page 12 TESTING DIODES (see figure 11) Figure 11. Testing Diodes Warning To avoid electric shock, injury, or damage to the Meter, disconnect circuit power and discharge all high-voltage capacitors before testing diodes. To measure diode, connect the Meter as follows: 1. Insert the red test lead into the terminal and the black test lead into the COM terminal. Set the rotary switch to 3. For forward voltage drop readings on any semiconductor component, place the red test lead on the component’s anode and place the black test lead on the component’s cathode.
- Page 13 MEASURING AC OR DC CURRENT (see figure 12) Figure 12.Measuring AC or DC Current Warning To avoid personal injury or damage to the Meter: • Never attempt to make an in-circuit current measurement when the open-circuit potential to earth is greater than 600V. •...
- Page 14 MEASURING FREQUENCY (see figure 13) Figure 13. Measuring Frequency • Press Hz button to select frequency measurement mode at m . Press Hz to exit frequency measurement mode and return to the previous measurement mode. • The maximum range of frequency is 1 MHz. • The signal attenuation is different from different measuring position and range. Therefore the required signal input amplitude and range may be different from different measuring position and range. • It is recommended to use the range which has higher input sensitivity. • If the input amplitude is higher than 1Vrms, it is required to use . To carry out the measurement. • When using current range to measure frequency, it is required to input signal more than 30 % of full range. The reading obtained is only for reference. Note: • When Frequency measurement has been completed, disconnect the connection between the testing leads and the circuit under test, and remove the testing leads away from the input terminals of the Meter. MEASURING TEMPERATURE (see figure 14) Figure 14.
- Page 15 Warning To avoid risk of shock do not connect thermocouple to electrically live circuits. Caution To avoid possible damage to the Meter or other equipment, remember that while the Meter is rated for -40°C to 537°C (-40°F to 998°F), the included K-type thermocouple is rated for 260°C (500°F). For temperature out of that range, use a higher rated thermocouple. To measure temperature, connect the Meter as follows: 1. Insert the red thermocouple into the terminal and the black thermocouple into the COM terminal. 2. Set the rotary switch to mV. 3. Press SELECT to choose temperature range. 4. Press RANGE to toggle between degrees Celsius (°C) or degrees Fahrenheit (°F). 5. Place the thermocouple to the object being measured. The measured value shows on the display. TESTING INSULATION (see figure 15) Figure 15.Testing Insulation Warning Make sure the circuit to be tested is dead before taking measurement. Never measure the insulation resistance of live equipment or circuit.
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Page 16: Replacing The Batteries
Caution The following improper operating procedure may force the Meter to power off automatically. To avoid the danger of electric shock and damage to the Meter: • Replace batteries as soon as battery indicator is on. Initiating high voltage when the battery indicator is on, which may force the Meter to power off. -
Page 17: Replacing The Fuse
REPLACING THE FUSE Replace the fuse as shown in Figure 16. Follow the steps below to replace the batteries. Warning To avoid shock, injury, or damage to the Meter: • Use ONLY fuses with the amperage and voltage specified. • Turn the Meter off and remove the testing leads from the terminals. 1. Remove the two screws from the battery door, two screws from the case bottom, one screw at the back of the battery. 2. Open the battery door and the case bottom 3. Remove the fuse by gently prying one end loose, and take out the fuse from its bracket. -
Page 18: Dc Voltage Measurement
Remarks: • Imput Impedance: ≥10MΩ • Displays effective value of sine wave • Frequency Response: 50Hz~1kHz DC VOLTAGE MEASUREMENT Range Resolution Accuracy Input Protection 60.00V 10mV 6.000V ± (0.3%+4) 1000V 600.0V 100mV 1000V Remark: • Input Impedance: ≥10MΩ DC MILLIVOLTS MEAUREMENT Range Resolution Accuracy Input Protection 60.00mV 10µV ± (0.4%+4) 600Vp 600.0mV 100µV Remark: •... - Page 19 CAPACITANCE MEASUREMENT Range Resolution Accuracy Input Protection 10.00nF 10pF 100.0nF 100pF 1000nF ±(3%+5) 600Vp 10.00µF 10nF 100.0µF 100nF DIODE TEST • Resolution: • Input Protection: 500Vp • Open circuit voltage: around 3V • Display approximate forward voltage drop nearest value CONTINUITY TEST • Continuity Indication: Continuous audible tone for test resistance below 30Ω • Open Circuit Voltage: around 3V • Input Protection: 500Vp • Resolution: 0.1Ω...
- Page 20 AT DCV/ACV RANGE Range Accuracy Input Protection 10Hz~100kHz ± (0.1%+3) 600Vp Remark: • Input amplitude: ≥ 600mV rms INSULATION SPECIFICATIONS Measurement Testing Voltages Resolution Accuracy Range 0.1MΩ~50.0MΩ 0.1MΩ (0% to 10%) 100V 0.1~100.0MΩ 0.1MΩ (0% to 10%) 0.2MΩ~99.9MΩ 0.1MΩ 100V ± (3%+5) (0% to 10%) 100MΩ~250MΩ 1MΩ 0.5MΩ~99.9MΩ 0.1MΩ 500V (0% to 20%) 100MΩ~500MΩ 1MΩ...
- Page 23 CERTIFICADO DE GARANTIA GUARANTEE CERTIFICATE CERTIFICAT DE GARANTIE ARTICULO / ITEM / ARTICLE: ..............................Nº DE SERIE / SERIE Nº / Nº SERIE: ............................ DISTRIBUIDOR / DISTRIBUTOR / DISTRIBUTEUR: ......................PAIS / COUNTRY / PAYS: ......................TEL.:........FECHA DE VENTA / SALE DATE / DATE VENTE: ........................NOMBRE DEL COMPRADOR / BUYER NAME / NOM DE L’ACHETEUR: ................TEL. COMPRADOR / BUYER TEL. / TEL. DE L’ACHETEUR: ....................EGA MASTER GARANTIZA AL COMPRADOR DE ESTA MAQUINA LA GARANTIA TOTAL (DURANTE 12 MESES), DE LAS PIEZAS CON DEFECTOS DE FABRICACION. ESTA GARANTIA NO CUBRE AQUELLAS PIEZAS QUE POR SU USO NORMAL TIENEN UN DESGASTE. PARA OBTENER LA VALIDEZ DE LA GARANTIA , ES ABSOLUTAMENTE IMPRESCINDIBLE QUE COMPLETE Y REMITA ESTE DOCUMENTO A EGA MASTER , DENTRO DE LOS SIETE DIAS A PARTIR DE LA FECHA DE COMPRA. EGA MASTER GUARANTEES TO THE BUYER OF THIS MACHINE THE TOTAL WARRANTY (DURING 12 MONTHS), OF THE PIECES WITH MANUFACTURING FAULTS. THIS GUARANTEE DOES NOT COVER THOSE PIECES WORN OUT DUE TO A NORMAL USE. IN ORDER TO OBTAIN THE VALIDITY OF THIS WARRANTY , IT IS ABSOLUTELY NECESSARY TO FULFILL THIS DOCUMENT AND RESEND IT TO EGA MASTER WITHIN 7 DAYS FROM SALE DATE. EGA MASTER GARANTIE A L’ACHETEUR DE CETTE MACHINE LA GARANTIE TOTALE (PENDANT 12 MOIS) DES PIECES AVEC DEFAUTS DE FABRICATION. CETTE GARANTIE NE COUVRE PAS LES PIECES QUE PAR UN USAGE NORMAL, SOIENT DETERIOREES. POUR OBTENIR LA VALIDITE DE LA GARANTIE, IL EST ABSOLUMENT IMPERATIF COMPLETER ET ENVOYER CE DOCUMENT EGA MASTER, DANS UN DELAI DE 7 JOURS A PARTIR DE LA DATE D’ACHAT. SELLO / STAMP / CACHET EJEMPLAR PARA EGA MASTER / COPY FOR EGA MASTER / EXEMPLAIRE POUR EGA MASTER CERTIFICADO DE GARANTIA GUARANTEE CERTIFICATE CERTIFICAT DE GARANTIE ARTICULO / ITEM / ARTICLE: ..............................Nº DE SERIE / SERIE Nº / Nº SERIE: ............................ DISTRIBUIDOR / DISTRIBUTOR / DISTRIBUTEUR: ......................PAIS / COUNTRY / PAYS: ......................TEL.:........FECHA DE VENTA / SALE DATE / DATE VENTE: ........................NOMBRE DEL COMPRADOR / BUYER NAME / NOM DE L’ACHETEUR: ................
- Page 26 C/ ZORROLLETA 11, POL. IND. JUNDIZ 01015 VITORIA, SPAIN P.O.B. APTDO. 5005 FAX. 34 - 945 290 141 TEL. 34 - 945 290 001 info@egamaster.com www.egamaster.com...
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