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Digi-Sense 20250-50 User Manual

Compact, with nist-traceable calibration
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User Manual
Compact Digital Multimeters
with NIST-Traceable Calibration
Model 20250-50
(2000 count, manual ranging)
Model 20250-51
(4000 count, autoranging)
THE STANDARD IN PRECISION MEASUREMENT
1065DGMAN_20250-50, -51 Digi-Sense Compact Multimeter.indd 1
8/15/2017 8:23:17 AM

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Summary of Contents for Digi-Sense 20250-50

  • Page 1 User Manual Compact Digital Multimeters with NIST-Traceable Calibration Model 20250-50 (2000 count, manual ranging) Model 20250-51 (4000 count, autoranging) THE STANDARD IN PRECISION MEASUREMENT 1065DGMAN_20250-50, -51 Digi-Sense Compact Multimeter.indd 1 8/15/2017 8:23:17 AM...
  • Page 2 Introduction Digi-Sense Compact Digital Multimeters (manual ranging model 20250-50; autoranging model 20250-51) are a must-have on your electrical tool belt. These versatile and simple-to-use DMMs safely measure common ranges of voltage, current, and resistance, and are packaged in a very convenient compact size.
  • Page 3 • ALWAYS use caution when working above 60 V dc or 30 V ac rms. Such voltages pose a shock hazard. • ALWAYS keep your fingers behind the finger guards on the probes. 1065DGMAN_20250-50, -51 Digi-Sense Compact Multimeter.indd 3 8/15/2017 8:23:17 AM...
  • Page 4 This symbol indicates that a device is protected throughout by double insulation or reinforced insulation. 1065DGMAN_20250-50, -51 Digi-Sense Compact Multimeter.indd 4 8/15/2017 8:23:17 AM...
  • Page 5 1. Instrument 2. Test leads 3. One type K temperature probe (model 20250-51 only) 4. One 9 V battery 5. Carrying case 6. User manual 7. NIST-traceable calibration report with data 1065DGMAN_20250-50, -51 Digi-Sense Compact Multimeter.indd 5 8/15/2017 8:23:17 AM...
  • Page 6 Ω 6. MODE button μ 7. Range button μ every 15 min. 8. Data HOLD button 9. Relative (REL) button Note: Tilt stand and battery compartment are on rear of unit. 1065DGMAN_20250-50, -51 Digi-Sense Compact Multimeter.indd 6 8/15/2017 8:23:17 AM...

  • Page 7: Symbols And Annunciators

    This is normal and is caused by the high-input sensitivity. The reading will stabilize and give a proper measurement when connected to a circuit. 1065DGMAN_20250-50, -51 Digi-Sense Compact Multimeter.indd 7 8/15/2017 8:23:18 AM...

  • Page 8: Ac/Dc Voltage Measurements

    ON or OFF. Large voltage surges may occur that can damage the meter. Model 20250-50: AC Voltage Measurement WARNING: Risk of Electrocution. The probe tips may not be long enough to contact the live parts inside some 240 V outlets for appliances because the con- tacts are recessed deep in the outlets.
  • Page 9 Model 20250-50: DC Voltage Measurement 1. Set the rotary function switch to the highest V DC position. 2. Insert the black test lead banana plug into the negative COM jack and insert the red test lead banana plug into the positive V jack.

  • Page 10: Ac/Dc Current Measurements

    (–) minus before the value. AC/DC Current Measurements Model 20250-50: DC Current Measurement CAUTION: Do not make current measurements on the 10A scale for longer than 30 seconds. Exceeding 30 seconds may cause damage to meter and test leads.
  • Page 11 8. Apply power to the circuit. 9. Read the current in the display. The display will indicate the proper decimal point, value, and symbol. 1065DGMAN_20250-50, -51 Digi-Sense Compact Multimeter.indd 11 8/15/2017 8:23:18 AM...
  • Page 12 8. Apply power to the circuit. 9. Read the current in the display. The display will indicate the proper decimal point, value, and symbol. 1065DGMAN_20250-50, -51 Digi-Sense Compact Multimeter.indd 12 8/15/2017 8:23:18 AM...

  • Page 13: Resistance Measurements

    4. Read the resistance in the display. The display will indicate the proper decimal point, value, and symbol. 1065DGMAN_20250-50, -51 Digi-Sense Compact Multimeter.indd 13 8/15/2017 8:23:18 AM...

  • Page 14: Continuity Check

    4. Touch the test probe tips to the circuit or wire you wish to check. Ω 5. If the resistance is less than approximately 30 , the audible signal will sound. The display will also show the actual resistance. 1065DGMAN_20250-50, -51 Digi-Sense Compact Multimeter.indd 14 8/15/2017 8:23:18 AM...
  • Page 15 4. Touch the test probe tips to the diode or semiconductor junction you wish to test. Note the meter reading. 5. Reverse the probe polarity by switching probe position. Note this reading. 1065DGMAN_20250-50, -51 Digi-Sense Compact Multimeter.indd 15 8/15/2017 8:23:18 AM...
  • Page 16 Remove the batteries and unplug the line cords. 1. Set the function switch to the CAP position. “nF” and a small value will appear in the display. 1065DGMAN_20250-50, -51 Digi-Sense Compact Multimeter.indd 16 8/15/2017 8:23:18 AM...
  • Page 17 4. Read the temperature in the display. The digital reading will indicate the proper decimal point and value. WARNING: To avoid electric shock, be sure the thermocouple has been removed before changing to another measurement function. 1065DGMAN_20250-50, -51 Digi-Sense Compact Multimeter.indd 17 8/15/2017 8:23:18 AM...
  • Page 18 2. Press the HOLD button again to resume normal operation. REL Button (Model 20250-51 only) The relative measurement feature allows you to make measurements relative to a stored reference value. A reference voltage, current, etc., can be stored and 1065DGMAN_20250-50, -51 Digi-Sense Compact Multimeter.indd 18 8/15/2017 8:23:18 AM...
  • Page 19 4. Press the RELATIVE button again to resume normal operation. Battery Test (Model 20250-50 only) 1. Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive V jack.

  • Page 20: Specifications

    600 V ± 4 dgts Input impedance: 7.8 MΩ Frequency range: 50 to 60 Hz (20250-50), 50 to 400 Hz (20250-51) Maximum input: 600 V DC or 600 V AC RMS 1065DGMAN_20250-50, -51 Digi-Sense Compact Multimeter.indd 20 8/15/2017 8:23:18 AM...
  • Page 21 + 2 dgts ± 5 dgts Overload protection (20250-50): 0.2 A / 250 V and 10 A / 250 V fuse Overload protection (20250-51): 0.5 A / 250 V and 10 A / 250 V fuse Maximum input (20250-50): 200 mA DC on µA / mA ranges,...
  • Page 22 100 Hz 9.999 MHz 1 kHz ±1.5% rdg ± 4 dgts Sensitivity: >0.5 V RMS while ≤1 MHz; >3 V RMS while >1 MHz Overload protection: 250 V DC or AC RMS 1065DGMAN_20250-50, -51 Digi-Sense Compact Multimeter.indd 22 8/15/2017 8:23:18 AM...
  • Page 23 1°F ±3% rdg ± 9°F/5°C –20 to +760°C 1°C Sensor: type K thermocouple Overload protection: 250 V DC or AC RMS Diode Test for both models 20250-50 and 20250-51 Test current Resolution Accuracy 0.3 mA typical 1 mV ±10% rdg ± 5 dgts Open circuit voltage: 1.5 V DC typical...
  • Page 24 Audible Continuity Audible threshold (20250-50): less than 30; Test current: <1 mA Audible threshold (20250-51): less than 150; Test current: <0.3 mA Overload protection: 250 V DC or AC RMS Compliance: EN61010-1 Insulation: Class 2, Double insulation Overvoltage category: CAT III 600 V...
  • Page 25 5. Put the battery door back in place. Secure with the two screws. 6. Dispose of the old battery properly. WARNING: To avoid electric shock, do not operate your meter until the battery door is in place and fastened securely. 1065DGMAN_20250-50, -51 Digi-Sense Compact Multimeter.indd 25 8/15/2017 8:23:18 AM...
  • Page 26 Notes . . . 1065DGMAN_20250-50, -51 Digi-Sense Compact Multimeter.indd 26 8/15/2017 8:23:18 AM...
  • Page 27 Notes . . . 1065DGMAN_20250-50, -51 Digi-Sense Compact Multimeter.indd 27 8/15/2017 8:23:18 AM...
  • Page 28 It is recommended that Digi-Sense products are calibrated annually to ensure proper function and accurate measure- ments; however, your quality system or regulatory body may require more frequent calibrations. To schedule your recalibration, please contact InnoCal, an ISO 17025 calibration laboratory accredited by A2LA.

This manual is also suitable for:

20250-51

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