Extech Instruments EX840 User Manual Download

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EX845-EN V2.1 02/10

Specifications

Function

Range & Resolution

Accuracy (% of r digits)

AC Current

50/60 Hz

400.0 AAC

± (2.5% + 8d)

1000 AAC

± (2.8% + 5d)

DC Current

400.0 ADC

± (2.5% + 5d)

1000 ADC

± (2.8% + 5d)

AC Voltage

50/60Hz

400.0 mVAC

± (1.0% + 10d)

4.000 VAC

± (1.5% + 5d)

40.00 VAC

400.0 VAC

1000 VAC

± (2.0% + 5d)

DC Voltage

400.0 mVDC

± (0.8% + 2d)

4.000 VDC

± (1.5% + 2d)

40.00 VDC

400.0 VDC

1000 VDC

± (2.0% + 2d)

Resistance

400.0

± (1.0% + 4d)

4.000k

± (1.5% + 2d)

40.000k

400.0k

4.000M

± (2.5% + 3d)

40.00M

± (3.5% + 5d)

Capacitance

4.000nF

± (5.0% + 30d)

40.00nF

± (5.0% + 20d)

400.0nF

± (3.0% + 5d)

4.000µF

40.00µF

400.0µF

± (4.0% + 10d)

4.000mF

± (10% + 10d)

40.00mF unspecified

Frequency

4.000kHz

± (1.5% + 2d)

Sensitivity: 100V (<50Hz); 50V (50 to 400Hz); 5V (401Hz to 4000Hz)

Summary of Contents for EX840

Page 1: ...User s Guide Extech EX845 True RMS 1000 Amp Clamp Meter with Bluetooth Patented ...

Page 2: ...nother symbol or terminal indicates the user must refer to the manual for further information This symbol adjacent to a terminal indicates that under normal use hazardous voltages may be present Double insulation SAFETY NOTES Do not exceed the maximum allowable input range of any function Do not apply voltage to meter when resistance function is selected Set the function switch OFF when the meter ...

Page 3: ...are not live If the equipment is used in a manner not specified by the manufacturer the protection provided by the equipment may be impaired This device is not a toy and must not reach children s hands It contains hazardous objects as well as small parts that the children could swallow In case a child swallows any of them please contact a physician immediately Do not leave batteries and packing ma...

Page 4: ...ion HOLD Data Hold Minus sign Negative reading display 0 to 3999 Measurement display digits ZERO Zero P Peak value AUTO Auto Range mode DC AC Direct Current Alternating Current MAX Max reading MIN Min reading Low battery mV or V Milli volts or Volts Voltage Ω Ohms Resistance A Amperes Current F Farad Capacitance Hz Hertz Frequency o F and o C Fahrenheit and Celsius units Temperature n m μ M k Unit...

Page 5: ...s and improves accuracy for DC current measurements To perform a zero select ADC and with no conductor in the jaw 1 Press the DC ZERO button to zero the display ZERO will appear in the display The offset value is now stored and removed from all measurements 2 To view the stored value press the DC ZERO button ZERO will flash and the stored value will be displayed 3 To exit this mode press and Hold ...

Page 6: ...na plug into the CAP positive jack 3 Press MODE to zero any stray capacitance 4 Touch the test probe tips across the part under test 5 Read the capacitance value in the display 6 The display will indicate the proper decimal point and value Note For very large values of capacitance measurement time can be several minutes before the final reading stabilizes Frequency Measurements 1 Set the function ...

Page 7: ...OM terminal and the red test lead into the Ω positive terminal 2 Set the function switch to the position 3 Use the MODE button to select continuity The display icons will change when the MODE button is pressed 4 Touch the test probe tips across the circuit or component under test 5 If the resistance is 40Ω a tone will sound Diode Test 1 Insert the black test lead banana plug into the negative COM ...

Page 8: ...rd if viewed directly for extended periods of time IR Spot to Distance Diagram The 8 1 spot to distance ratio determines the size of the measured surface area with respect to the distance the meter is held away from the surface IR Measurement Notes 1 The object under test should be larger than the spot target size calculated by the field of view diagram 2 If the surface of the object under test is...

Page 9: ...selected MAX MIN 1 Press the MAX MIN key to activate the MAX MIN recording mode The display icon MAX will appear The meter will display and hold the maximum reading and will update only when a new max occurs 2 Press the MAX MIN key and MIN will appear The display icon MIN will appear The meter will display and hold the minimum reading and will update only when a new min occurs 3 Press the MAX MIN ...

Page 10: ...on in the camera manual 3 Once paired the data from the EX485 will be continuously displayed and updated on the camera display Notes 1 More than one meter can be paired with one camera to observe multiple legs in three phase systems 2 If a paired bluetooth device is removed from a camera list perform a camera restore 3 During initialization it can take up to 15 seconds to establish communication a...

Page 11: ...B digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that int...

Page 12: ...emove the battery and store it separately Battery Replacement 1 Remove the Phillips head screw that secures the rear battery door 2 Open the battery compartment 3 Replace the 9V battery 4 Secure the battery compartment You as the end user are legally bound Battery ordinance to return all used batteries and accumulators disposal in the household garbage is prohibited You can hand over your used bat...

Page 13: ... 000 VAC 1 5 5d 40 00 VAC 400 0 VAC 1000 VAC 2 0 5d DC Voltage 400 0 mVDC 0 8 2d 4 000 VDC 1 5 2d 40 00 VDC 400 0 VDC 1000 VDC 2 0 2d Resistance 400 0Ω 1 0 4d 4 000kΩ 1 5 2d 40 000kΩ 400 0kΩ 4 000MΩ 2 5 3d 40 00MΩ 3 5 5d Capacitance 4 000nF 5 0 30d 40 00nF 5 0 20d 400 0nF 3 0 5d 4 000µF 40 00µF 400 0µF 4 0 10d 4 000mF 10 10d 40 00mF unspecified Frequency 4 000kHz 1 5 2d Sensitivity 100V 50Hz 50V 5...

Page 14: ...sensor Type K thermocouple required IR Spectral response 6 to 16µm IR Emissivity 0 95 fixed IR distance ratio 8 1 Input Impedance 10MΩ VDC and VAC AC bandwidth 50 to 400Hz AAC and VAC AC response True rms AAC and VAC Crest Factor 3 0 in 40A and 400A ranges 1 4 in 1000A range 50 60Hz and 5 to 100 of range Operating Temperature 41 F to 104 F 5 C to 40 C Storage Temperature 4 F to 140 F 20 C to 60 C ...

Page 15: ...ges freight insurance and proper packaging to prevent damage in transit This warranty does not apply to defects resulting from action of the user such as misuse improper wiring operation outside of specification improper maintenance or repair or unauthorized modification Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable...

Page 16: ...EX845 EN V2 1 02 10 16 ...

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