Mastech MS8218 Instruction Manual

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Page 1 MS8218 True RMS Multimeter Contents Contents Chapter 1 Safety Information ◎ Meter Safety Standards…………………………………………………………………………………………………. ◎ Warning…………………………………………………………………………………………………………………. ◎ Limited Guarantee and the Liability Range…………………………………………………………………………….. Chapter 2 Introduction to the Meter ◎ Characteristics………………………………………………………………………………………….……………..… ◎ Explanation on Front Panel……………………………………………………………………………………………... ◎ Understanding Display Screen…………………………………………………………………………………………..
Page 2: Table Of Contents
MS8218 True RMS Multimeter Contents ◎ DC mA/AC mA/DC mA +AC mA Measurement……………………………………….……………………………… ◎ DC Ampere/AC Ampere/DC Ampere+AC Ampere Measurement……………………….……………………………. ◎ Linear Frequency Measurement……………………………………….…………….……………….………..………… ◎ Relative Value Measurement………………………………………………………….………………………………… ◎ Maximum Value/Minimum Value/Maximum Value-Minimum Value Measurement………………………….……… ◎ Backlight Control……………………………………………………………………………………………….………. ◎ Data Hold………………………………………………………………………………………………………………..
Page 3 MS8218 True RMS Multimeter Safety Information Chapter 1 Meter Safety Standards This style of digital multimeter is designed and manufactured according to the safety requirements set out by the IEC1010-1 standards for electronic test instruments and the hand-hold digital multimeters. Its design and manufacture is strictly based on Ⅲ...
Page 4 MS8218 True RMS Multimeter Safety Information potential during measuring. The body should be kept insulated from ground with dry insulating shoes, insulating pads or insulating clothes. When performing measurement with a test probe your fingers should be put behind a finger-protector.
Page 5 MS8218 True RMS Multimeter Introduction to the Meter Chapter 2 Characteristics 50000 counts measurement ACV and DCV measurements reach up to 1000V. DC measurement accuracy reaches up to 0.03%. Ω μ 0.01 resistance resolution and 1 V voltage resolution. Linear frequency measurement, logic frequency/duty ratio measurement.
Page 6 MS8218 True RMS Multimeter Introduction to the Meter Explanation on Front Panel The front panel is shown as in Figure 2-1, explanation being as follows:...
Page 7 MS8218 True RMS Multimeter Introduction to the Meter (1) V Ω H z end It is the input end for all measurement functions except for current measurement, connected with a red meter probe. (2) COM end It is the negative input end for all measurements, connected with a black meter probe.
Page 8 MS8218 True RMS Multimeter Introduction to the Meter (8) SELECT key When setting the rotary switch to a measurement function, the meter will enter its first measurement mode, while pressing the SELECT key it is possible to select the second or the third measurement mode. However, there is only one for the diode and Capacitance measurements.
Page 9 MS8218 True RMS Multimeter Introduction to the Meter (12)HOLD key Used to maintain the measurement data unchanging, by pressing the key again it will resume the measurement. When releasing the key after pressing it for two seconds, the meter will enter the state connecting with the RS-232C interface of computer while sending measurement information to computer.
Page 10 MS8218 True RMS Multimeter Introduction to the Meter Understanding Display Screen : Figure 2—2...
Page 11 MS8218 True RMS Multimeter Introduction to the Meter LCD screen is shown as in Figure 2-2, with its every symbol’s meaning shown as in the Table 1: Number of Order Symbol Functions Indicating the measurement unit being ℃ ℉ of temperature ℃...
Page 12 MS8218 True RMS Multimeter Introduction to the Meter Tabel1 (continue) Indicating it is now in the AC measurement state, while DC and AC displaying simultaneously, indicating it is DC+AC measurement Indicating the measurement vale being negative Indicating it is now in the DC measurement state, while DC and AC...
Page 13 MS8218 True RMS Multimeter Introduction to the Meter Function Descriptions Along with the conventional measurement functions this meter also possesses some special functions which being described as follows: ● True effective value (TRUE RMS) measurement: all the measurement values of this meter on the AC voltage and AC current are true effective values, which distinguishing this meter from the low-grade meters which only can measure the AC average value.
Page 14 MS8218 True RMS Multimeter Introduction to the Meter selected range. Press the RANGE key under the manual range for two seconds and then release it, the meter will go back to the automatic range state. ● Linear frequency measurement: Pressing the ～...
Page 15 MS8218 True RMS Multimeter Introduction to the Meter ● Automatic shutdown and the continuous operating mode: after the meter being turned on, in case of stopping to pressing any key or stopping to turning the rotary switch for more than fifteen minutes, the meter will automatically shutdown. As the meter will still consume a little energy after its automatic shutdown, so it is better to turn off the POWER switch if the meter remains idle for a long time.
Page 16 MS8218 True RMS Multimeter Operation Methods Chapter 3 Operation Methods ACV/dBm Measurement The measurement is shown as in Figure 3-1, with voltage range being of AC 0.5V ～ 1 000V and the measurement methods being as follows: 1. Turn on the power switch and set the rotary switch to the position of V ～...
Page 17 MS8218 True RMS Multimeter Operation Methods ACV/dBm Measurement Warning Not try to measure a voltage higher then 1000 vol Figure 3-1...
Page 18 MS8218 True RMS Multimeter Operation Methods DCV/DCV + ACV Measurement The measurement is shown in Figure 3-2,the range of voltage is of AC or DC 0.5V ～ 1 000V and the methods are as follows: Turn on the power switch and set the rotary-table switch to the position V Insert the red testing line into the V Ω...
Page 19 MS8218 True RMS Multimeter Operation Methods DCV + ACV Measurement Warning Not try to measure a voltage higher then 1000 vol Figure 3-2...
Page 20 MS8218 True RMS Multimeter Operation Methods DC mV/AC mV/DC mV+AC mV Measurement The testing chart is shown in the Figure 3-3. The voltage measurement range is of 1 μ ～ 5 00mV and the measurement methods are as follows: Turn on the power switch and set the rotary switch to the position mV Insert the red testing line into the V Ω...
Page 21 MS8218 True RMS Multimeter Operation Methods DC mV/AC mV DC mV+Ac mV Measurement Figure 3-3...
Page 22 MS8218 True RMS Multimeter Operation Methods Logic Frequency/Duty Ratio Measuremeat The testing chart is shown in the Figure 3-4.The frequency range is of 5Hz ～ 2 MHz （ V p 2.5 ～） , while the duty ratio measurement range being of 5% ～...
Page 23 MS8218 True RMS Multimeter Operation Methods Logic Frequency Duty Ratio Measuremeat Figure 3-4...
Page 24 MS8218 True RMS Multimeter Operation Methods Diode Measurement The measurement chart is shown in figure 3-5. The measurement range of diode is of 0 ～ 2 .5V. The measurement methods are as follows: Turn on the power switch and set the rotary switch to the position Insert the red testing line into the V Ω...
Page 25: Diode Measurement
MS8218 True RMS Multimeter Operation Methods Diode Measurement Figure 3-5...
Page 26 MS8218 True RMS Multimeter Operation Methods Resistance/continuity Test The test chart is seen in Figure 3-6. the measurement range of resistance is of 0.01 Ω ～ 5 0M Ω and the measurement methods are as follows: 1. Turn on the power switch and set the rotary switch to the position 2.
Page 27 MS8218 True RMS Multimeter Operation Methods Resistance Continuity Measurement Figure 3-6...
Page 28 MS8218 True RMS Multimeter Operation Methods Capacitance Measurement The measurement chart is seen in figure 3-7. the measurement range of capacitance is of 10PF ～ 5 000 μ F and the measurement methods are as follows: 1. Turn on the power switch and set the rotary switch to the position 2.
Page 29: Capacitance Measurement
MS8218 True RMS Multimeter Operation Methods Capacitance Measurement Figure 3-7...
Page 30 MS8218 True RMS Multimeter Operation Methods μ μ μ μ A /AC μ μ μ μ A /DC μ μ μ μ A + AC μ μ μ μ A Measurement The measurement is seen in Figure 3-8, the measurement range of current is of AC or DC 0.01 μ...
Page 31 MS8218 True RMS Multimeter Operation Methods DC μ μ μ μ A AC μ μ μ μ A DC μ μ μ μ A+AC μ μ μ μ A Measurement Figure 3-8...
Page 32: Dc Ma/Ac Ma/Dc Ma +Ac Ma Measurement
MS8218 True RMS Multimeter Operation Methods DC mA/AC mA /DC mA + AC mA Measurements The measurement is seen in the Figure 3-9. The measurement range of current is of AC or DC 1 μ ～ 5 00mA and the measurement methods are as follows: 1.
Page 33 MS8218 True RMS Multimeter Operation Methods DC mA AC mA DC mA+AC mA Measurement Figure 3-9...
Page 34: Dc Ampere/Ac Ampere/Dc Ampere+Ac Ampere Measurement
MS8218 True RMS Multimeter Operation Methods DC Ampere/AC Ampere/DC Ampere + AC Ampere Measurement The measurement is seen in Figure 3-10, the measurement range of current is of AC or DC 0.1mA ～ 1 0A and the measurement methods are as follows: Turn on the power switch and set the rotary switch to the position A Insert the red testing line into the A input end and the black testing line into the COM input end.
Page 35 MS8218 True RMS Multimeter Operation Methods Ampere Ampere Ampere Ampere Measurement Figure 3-10...
Page 36: Linear Frequency Measurement
MS8218 True RMS Multimeter Operation Methods Linear Frequency Measurement The measurement is seen in the Figures 3-1, 3-2, 3-3,3-8 and 3-9. The measurement range is of 5Hz ～ 2 00KHz and the measurement methods are as follows: When performing voltage or current measurement, in case of measured value being AC or including AC elements, it is possible to measure and display the alternating frequency by pressing the ～...
Page 37: Relative Value Measurement
MS8218 True RMS Multimeter Operation Methods Relative Value Measurement Except for frequency 、 d uty ratio and diode measurements, all other measurements can employ relative measurement. Press Δ Δ Δ Δ key to enter relative measurement and the meter will record the initial value when pressing the key. And the later...
Page 38: Backlight Control
MS8218 True RMS Multimeter Operation Methods the minimum value, the maximum value — minimum value or the maximum value. When the meter being in the maximum and the minimum value record state, the analog bar is always indicating the present measurement value but not the MAX/MIN value.
Page 39 MS8218 True RMS Multimeter Operation Methods Notes: After auto-shutdown there will still be a little electricity consumption in the meter, so it is recommended to turn off the power when the meter is to remain un-working for a long time.
Page 40: General Features
MS8218 True RMS Multimeter Technological Specifications Chapter 4 Technological Specifications General Features ● Voltage between the measurement end and ground is of 1000V AC/DC. 1000V CAT Ⅲ , 2th pollution grade. ● 50000 counts, automatic/manual range, basic sampling rate 2.5 t/s and 51 segment analog bar.
Page 41: Range And Accuracy
MS8218 True RMS Multimeter Technological Specifications Range and Accuracy The below-listed accuracies under different ranges refer to those which are guaranteed by the meter within one-year calibration, with normal use under the operating temperature of 18 ℃ - 28 ℃...
Page 42 MS8218 True RMS Multimeter Technological Specifications ● AC Current/DC Current + AC Current Accuracy Voltage Drop Range Resolution 40Hz ∽ 1 KHz 1KHz ∽ 1 0KHz 10KHz ∽ 2 0KHz 102µV/µA μ μ ± ± ± 0.01 ( 0.75%+20) ( 1%+20) ( 2%+20) μ...
Page 43 MS8218 True RMS Multimeter Technological Specifications ● Resistance Range Resolution Accuracy Ω Ω ± 0.01 ( 0.1%+10) Ω Ω ± ( 0.1%+5) Ω Ω ± ( 0.1%+5) 500K Ω Ω ± ( 0.1%+5) Ω Ω ± ( 0.1%+10) Ω Ω...
Page 44 MS8218 True RMS Multimeter Technological Specifications ● Logic Frequency Frequency Range Sensitivity Accuracy ∽ 2 MHz Vp 2 ∽ 5 V square wave ± ( 0.006%+4) ● Linear Frequency Frequency Range Voltage/Current Range Sensitivity Accuracy 500mV 100mV 0.5V ∽ 2 00KHz 500V ±...
Page 45: Replacement Of Fuse
MS8218 True RMS Multimeter Maintenance Chapter 5 Maintenance Replacement of Batteries symbol appears on the LCD screen during measurement, it indicates the total voltage of batteries being lower than 6.8V. For ensuring measurement accuracy, it is necessary to replace the batteries. Before the replacement, must take off the red and black testing lines from the measured circuit and turn off the power of the meter.
Page 46: Meter Calibration
MS8218 True RMS Multimeter Maintenance Meter Calibration There is no any component which can be used for calibration in the meter, calibration of the meter is implemented depending on the built-in software in the meter. Professionals and accuracy-even-higher standard signal sources are required for calibration of the meter.

Mastech MS8218 Instruction Manual

Chapter 4 Technological Specifications

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