Mastech MS8240A Manuals

FUNC HOLD MAX FUSED FUSED MS8240A Digital Multimeters 1. Preface CONTENTS 5. Measurement Operation 5.1 DC Voltage and AC Voltage Measurement 5.2 Resistance Measurement 5.3 Diode Test 5.4 Continuity Measurement 5.5 Capacitance Measurement 5.6 Transistor Measurement 5.7 Frequency Measurement 5.8 Current Measurement 5.9 Temperature Measurement .....................................................1 ........................10 ...................10 2. Safety Information 3. Product Overview ...................................1 ....................................3 3.1 Product Outline and its Description 3.2 Function Keys ........3 .......................................4 4. Technical Indicators ................................5 4.1 General Characteristics 4.2 Electrical Technical Indicators .........................5 ...............6 ....................11 ...........................................12 .....................13 ..................14 ......................15 .....................16 .........................16 ..................18 6. Maintenance ...........................................19 6.1 Battery Replacement 6.2 Fuse Replacement 6.3 Others ...........................19 ..............................19 ................................................19 01 1. Preface This digital multimeter (hereinafter referred to as the “meter”) is a pocket-sized multifunction instrument that uses 4 x1.5V SIZE AA batteries. This series of products is designed with beautiful appearance, firm structure and excellent durability. It uses elastic ABS material and double-injection molding design, and has good shock-resistant performance. The meter meets GB/T 13978-92 digital multimeter general technology standards and GB4793.1-1995 (IEC-61010-1: 2001) electronic measurement instrument safety requirements, with class-II pollution and over-voltage standard CAT III 600V. Its full function protection ensures the safe and proper use of the meter. As a general electrical measuring and testing device, this meter can be widely used in the social electronic fields such as schools, research institutes and factories. 2. Safety Information The user should observe to the following safety tips in Warning Please particularly note that inappropriate use may cause shock or damage to the meter. The user should comply with common safety procedures and completely follow the safety measures stated in this operation manual. In order to make full use of the meter's functions and ensure safe operation, please carefully follow the procedures described in this section. FUNC HOLD MAX FUSED FUSED 03 02 order to avoid personal injury and meter malfunction that may be caused by electric shock. • Do not measure any voltage outside the measurement range specified by this meter. • Although there is an internal protection circuit in the resistance measurement position, do not apply any high voltage (above 100V) in the resistance measurement position. • Check the test wire for any damage or bare metal. • The meter should not be used in direct sunlight or high temperature. • Please note that possible electric shock may be caused if input voltage exceeds 36V AC or 48C DC. • Before measuring current, please first switch off the equipment to be measured, and disconnect the measured circuit. Then, connect the test probe securely, switch on the power, and then start measuring. • Pay attention to correct battery polarity when replacing batteries. • Be sure to use a fuse with the same specification and model when replacing it. Electric symbols: Dangerous voltage Grounding AC (Alternating Current) Double insulation Warning, please see the related instructions in the manual DC (Direct Current) Fuse AC DC 3. Product Overview 3.1 Product Outline FRONT PANEL 1 2 3 4 5 6 8 7 11 10 9 04 05 Appearance description 1. Liquid crystal display (LCD) 2. Maximum key 3. Data hold key 4. Knob 5. Inputs of voltage, resistance, frequency and diode 6. Common end 7. Inputs of current, capacitance and temperature 8. Input of large current 9. Power switch key 10. Function choice 11. Backlight control key 3.2 Function Keys Function switch key: used for temperature measuring range switch (°C and °F), and diode measuring range switch between diode mode and continuity mode. Hold key: During measuring, press this key. The current displayed readout of the meter is locked on the display and it will be unlocked after you press the key again. Maximum key: During measuring, press this key to display the currently measured maximum of the meter. Press again to exit the maximum display mode. Backlight function key: The backlight will light on if you press and hold this key for 2 seconds. It will turn off automatically after 15 seconds. Press again to exit the backlight function. Press to switch the meter on or off. FUNC HOLD MAX 4. Technical Indicators 4.1 General Characteristics Manual measuring range DMM, with 1999 in count under full range. Display: 3 1/2-bit LCD display Overload protection: Full-function and full-range protection. Data holding function Maximum measurement Backlight Low-voltage display Automatic power-off Operating temperature and humidity: 0~ 40°C (32~104°F); relative humidity <80%RH Storage temperature and humidity: -10~ 50°C (14~122°F); relative humidity < 70%RH Power supply: 1.5V battery (AA type)×4 Safety level: IEC61010-1 and CAT III 600V Dimension (L×W×H): 205×102×58mm, Weight: About 390g