Mastech MS8268 HANDHELD DIGITAL MULTIMETER OPERATOR’S INSTRUCTION MANUAL http://www.chargerbuy.
Table of Contents TITLE Table of Contents PAGE 1. GENERAL INSTRUCTIONS 1.1 Precaution safety measures 1.1.1 Preliminary 1.1.2 During use 1.1.3 Symbols 1.1.4 Instructions 1.2 Safety mechanisms 1 1 1 2 4 4 5 2. DESCRIPTION 6 2.1 Instrument Familiarization 2.2 LCD Display 2.3 Keypad 2.4 Terminals 6 7 9 10 2.5 Rotary switch 2.6 Accessories 11 11 3. FUNCTION DESCRIPTION 12 3.1 General Functions 3.1.1 Misconnection alarm system 3.1.2 DATA HOLD mode 3.1.3 Manual ranging and Autorange mode 3.1.
1. GENERAL INSTRUCTIONS This instrument complies with IEC 1010-1 (61010-1@IEC: 2001), CAT. II 1000V and CAT. III 600V overvoltage standards. See Specifications. To get the best service from this instrument, read carefully this user's manual and respect the detailed safety precautions. International symbols used on the Meter and in this manual are explained in chapter 1.1.3 1.1 Precautions safety measures 1.1.1 Preliminary * Measurement category III is for measurements performed in the building installation.
* Do not apply any voltage measurement between the 10A terminal and the COM terminal. * Caution when working with voltages above 60Vdc or 30Vac rms. Such voltages pose a shock hazard. * When using the probes, keep your fingers behind the finger guards. * When making connections, connect the common test lead before connecting the live test lead; when disconnecting, disconnect the live test lead before disconnecting the common test lead.
* Any adjustment, maintenance or repair work carried out on the meter while it is live should be carried out only by 2. DESCRIPTION 2.1 Instrument Familiarization appropriately qualified personnel, after having taken into account the instructions in this present manual. * A "qualified person" is someone who is familiar with the installation, construction and operation of the equipment and the hazards involved.
2.2 LCD Display See Table 1 indicated for information about the LCD display. Symbol Table 1. Display Symbols (continued) Meaning RELΔ Indicator for the Relative measurement. Indicator for the Diode Test mode hFE Indicator for the transistor test mode Indicator for the Continuity Check mode. Indicator for the Data Hold mode AC V, mV Volts. The unit of voltage. Millivolt. 1x10-3 or 0.001 volts. Meaning A, mA, μA The battery is low.
2.3 Keypad See Table 2 indicated for information about the keypad operations. Table 2. Keypad Key RANGE Function V~,V ,Ω, mA and μA A, mA and μA V~, A, and μA. HOLD Any switch Press HOLD to enter and exit position 1. Press RANGE to enter the manual ranging mode. 2. Press RANGE to step through the ranges available for the selected function. 3. Press and hold RANGE for 2 seconds to return to autoranging. LIGHT mA Table 4. Terminals Terminal Description Return terminal for all measurements.
2.5 Rotary switch A eleven-position rotary selector switch gives access to the following quantities: ¥ Current: 10A ¥ Current: mA ¥ Current: μA ¥ DC Voltage ¥ AC Voltage ¥ OFF: off position ¥ Resistance ¥ Diode and Continuity (with beep) ¥ Capacitance ¥ Transistor: hFE ¥ Frequency 3. FUNCTION DESCRIPTION 3.1 General Functions 3.1.1 Misconnection alarm system The input terminals of the meter are equipped with sound and light alarms against misconnection of test leads.
3.1.2 DATA HOLD mode Data Hold mode makes the meter stop updating the display. Enabling Data Hold function in autorange mode makes the meter switch to Manual ranging mode, but the full-scale range remains the same. Data Hold function can be cancelled by changing the measurement mode, pressing RANGE key, or push HOLD key again. To enter and exit the Data Hold mode: 1. Press HOLD key (short press). Fixes the display on the current value, “H” is displayed. 2.
