Related Manuals for Extech Instruments MA400
Summary of Contents for Extech Instruments MA400
- Page 1 User’s Guide MiniAmp™ Series Clamp-on Multimeters Models: MA400 MA420 MA440 MA460+...
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Page 2: Warranty
The warranty set forth above is inclusive and no other warranty, whether written or oral, is expressed or implied. Copyright © 2001 Extech Instruments Corporation. All rights reserved including the right of reproduction in whole or in part in any form. -
Page 3: International Safety Symbols
Introduction Congratulations on your purchase of Extech model MA400, MA420, MA440 or MA460+ clamp-on multimeter. Properly used, this meter will provide many years of reliable service. Clamp meter functions common to all meters: Autoranging AC Current Measurements Data Hold Auto Power Off Maximum Hold captures 30ms peaks 1.1"... -
Page 4: Safety Precautions
Safety Precautions Improper use of this meter can cause damage, shock, injury or death. Read and understand this users manual before operating the meter. Make sure any covers or battery doors are properly closed and secured. Always remove the test leads before replacing the battery or fuses. - Page 5 PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY OVERVOLTAGE CATEGORY I Equipment of OVERVOLTAGE CATEGORY I is equipment for connection to circuits in which measures are taken to limit the transient overvoltages to an appropriate low level. Note – Examples include protected electronic circuits. OVERVOLTAGE CATEGORY II Equipment of OVERVOLTAGE CATEGORY II is energy- consuming equipment to be supplied from the fixed installation.
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Page 6: Specifications
Specifications DC Voltage RANGE Accuracy 400.0mV 0.3% + 4d 4.000V, 40.00V, 400.0V 0.5% + 3d 600V 1.0% + 4d NMRR: >50dB @ 50/60Hz, CMRR: >120dB @ DC, 50/60Hz, Rs=1kΩ Input impedance: 10MΩ, 30pF nominal, 1000MΩ on the 400.0mV range. AC Voltage RANGE (50Hz to 500Hz) Accuracy 4.000V, 40.00V, 400.0V... - Page 7 600V 400V 5Hz to 5kHz 10Hz to 30kHz 400µA (MA440&460+) 500µA 10Hz to 30kHz 2000µA (MA440&460+) 500µA 400.0A (MA400&420) 40Hz to 400Hz Display counts: 4999, Max resolution: 0.001Hz, Accuracy: 0.5% + 4d Temperature (MA460+ only) RANGE Accuracy -4°F to 573°F 2% + 6°F...
- Page 8 Nominal 0.15 x specified accuracy per ºC (between 0 and 18 C or 28 to C), or as otherwise specified AC Sensing: True RMS on MA420, Average sensing on MA400, MA440 and MA460+ Auto Power Off: After 30 minutes of inactivity MA Series V2.0 7/02...
- Page 9 The MiniAmp™ Series meters meet IEC61010-032(1994), EN61010-2- 032(1995), UL3111-2-032(1999). MA440 and MA460+: Category III 600V AC & DC MA400 and MA420: Category II 600V AC & DC and Category III 300V AC & E.M.C.: Meets EN61326(1997, 1998/A1), EN61000-4-2(1995), and EN61000-4-...
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Page 10: Meter Description
Multimeter LCD display Select button Multimeter function switch Multimeter input jacks Hz button Clamp power button 10. Data Hold/Max Hold button MA400 and MA420 (single display models) Clamp jaw Jaw trigger LCD display Select button Multimeter function switch Multimeter input jacks... -
Page 11: Operation
CAUTION: Do not make current measurements above 350A for longer than 60 seconds. Exceeding 60 seconds may cause damage to the meter. For the MA400 and MA420, slide the function switch to the ACA position. For the MA440/MA460+, press the Clamp Power button. - Page 12 Press the SELECT key repeatedly until capacitance units (F) are displayed in the LCD. The Rel function (models MA400 and MA420) can be used to zero stray lead and circuit capacitance. Touch the test leads to the capacitor to be tested and read the measured value.
- Page 13 electrical noise that may produce an unstable reading. However, if the HZ reading displays zero due to insufficient sensitivity, activate the HZ function before measuring the signal to select the highest Hz sensitivity. Diode Test Insert the black lead into the negative COM jack and the red test lead into the positive jack Slide the function switch to "...
- Page 14 Note: The Max Hold feature applies only to the upper current display (ACA) on the MA440 and MA460+ double display models. It applies to the ACA, DCV and ACV functions on the single display MA400 and MA420 models. Relative (MA400 and MA420 only) Press the Rel key once to a store the displayed reading as the reference value.
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Page 15: Maintenance
Remove the two Philips head screws from the case bottom and remove the bottom case. The batteries (two LR44’s for the MA400 and MA420, four LR44’s for the MA440, and two CR2032’s for the MA460+) are located in button battery holders.