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DIGITAL MULTIMETER

OPERATION MANUAL
REL MAX MIN
AUTO
0
10
20
30
40
MS8251A
MS8251A
%
kHz
C F
Hz
mVA
nmF
kM
50
60 66
CAT .I V
600 V
CAT .III
1000 V

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Summary of Contents for Mastech MS8251A

  • Page 1: Digital Multimeter

    MS8251A DIGITAL MULTIMETER OPERATION MANUAL MS8251A REL MAX MIN AUTO 60 66 CAT .I V 600 V CAT .III 1000 V...
  • Page 2: Safety Information

    1. Safety Information 1.2 Use 1.2.1 Turn the rotary switch to the required function and range to be measured. Warning 1.2.2 When using the CAT Ⅳ environment, if the To reduce the risk of electrical shock, product damage measuring voltage between terminals and earth or personal injury, please follow the safety instructions ground exceeds 600V, CAT III environments or described in the user manual.
  • Page 3 (Category II) Features and Components CAT III Refers to the impulse withstand voltage The MS8251A is a portable, hand-held yet professional protection level in accordance with IEC-61010-1 meter that features an LCD with backlight, overload standard overvoltage(installation) category III, protection and low battery indicator. These meters are...
  • Page 4 2.2 Buttons and Symbols HOLDbutton: hold current reading on screen. FUNC button: switch between functions. RANGE button: switch between auto/manual ranges. REL button: relative reading MS8251A MAX/MIN button: switch between maximum/ minimum REL MAX MIN readings. AUTO utton: turn on/off backlight.
  • Page 5: Specifications

    3. Specifications Alternating current The Meter should be calibrated annually between Direct current 18°C~28°C and a relative humidity less than 75%. Diode 3.1 General Specifications Continuity 3.1.1 Manual and auto range Autoranging mode AUTO 3.1.2 Full range overload protection Maximum value 3.1.3The maximum voltage allowed between the measuring Minimum value end and the earth:CAT IV measurement environment...
  • Page 6 3.2.4 AC Voltage 3.2 Technical Specifications 3.2.1 average value Characteristics range Frequency Range Resolution Accuracy Average response digital multimeter, when the input a ±(1.5% reading 660mV 0.1mV 40 ~ 60Hz pure sine wave, you can accurately measure the rms of + 5 digits) sine wave, but the non-sinusoidal RMS measurement is 6.6V...
  • Page 7 3.2.6 Capacitance 3.2.9 Frequency 3.2.9.1 Frequency (V position): range Resolution Accuracy range Resolution Accuracy ±(4.0% reading + 5 digits) 6.6nF 0.001nF 66Hz 0.01Hz 66nF 0.01nF 660Hz 0.1Hz 660nF 0.1nF ±(1.5% reading + 5 digits) 6.6kHz 0.001kHz 6.6µF 0.001µF ±(3.0% reading + 3 digits) 10kHz 0.01kHz 66µF...
  • Page 8 3.2.10 DC Current 3.2.12 Temperature range Range Input Test Range Accuracy Resolution Accuracy Ambient Temp ±2 digits 660 A µ 0.1µA ±4 digits 0~1000°C 400°C 6600 A µ 1µA ±(1.0% reading + 5 digits) ±5 digits ±(1.0% of reading 1000°C 10µA 66mA +3 digits)
  • Page 9 4.4 Maximum/Minimum Reading Note: 1.Even though there is no indication,voltage may still 4.4.1 Press “MAX/MIN” to display the maximum value exist.Do not rely solely on NCV detector to determine recorded the presence of voltage in a wire.The measurement 4.4.2 Press “MAX/MIN” again to display the minimum may be affected by the design of the outlet,type of value recorded.
  • Page 10: Maintenance

    4.11 Continuity 4.15 Current 4.11.1 In resistance mode, press “FUNC” to switch to 4.15.1 Remove power to the circuit and discharge all continuity mode. capacitance. 4.11.2 Connect the red test lead to the input jack and the 4.15.2 Move the rotary switch to the appropriate position black test lead to the “COM”...
  • Page 11 5.2 Test Lead Replacement Warning Replace the test leads with identical or compatible leads.lead spec:1000V 10A. Replace test leads if leads become worn. 6. Accessories 1.Test Leads 1 pair 2.Manual 1 pc 3.Battery 9V 6F22 1 pc 4.multifunctional test socket 5.electromagnetic pendant 6.K-type temperature probe 00-05-3589...