Extech Instruments 380900 User Manual Download Page 8

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380900-EN v3.1 07/13

Dual Channel Voltage and Current Measurement

Warning

: Both channels share the same ground. Voltage and current with different grounds cannot

be measured.

Note

: The

COM

jack should be used as the CURRENT ground. The

jack should be used as the

VOLTAGE ground. The two grounds are connected internally by a fuse.

1.

Set the Channel 1 voltage function: "

VAC

", "

VDC

", "

mVAC

", or "

mVDC

Set the Channel 2 current function: "

ACA

", "

DCA

", "

ACmA

", "

DCmA

”, “

ACµA

”, or “

DCµA

”.

Insert the test leads into the input jacks.

4. Connect the test leads in PARALLEL to the voltage circuit to be measured, and connect the

test leads in SERIES with the current to be measured.

Read the voltage and current measurements on the display.

Summary of Contents for 380900

Page 1: ...User Guide Dual Channel True RMS MultiMeter with PC interface Model 380900 ...

Page 2: ...his meter is shipped fully tested and calibrated and with proper use will provide years of reliable service Safety International Safety Symbols This symbol adjacent to another 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 or Reinforced insu...

Page 3: ...wer from the device under test before performing Capacitance Diode Resistance or Continuity tests 8 Remove the battery from the meter if the meter is to be stored for long periods 9 To avoid electric shock do not measure AC current on any circuit whose voltage exceeds 1000V AC 10 Voltage checks on electrical outlets can be difficult and misleading because of the uncertainty of connection to the el...

Page 4: ...on 6 Record function 7 Manual range key 8 Shift key 9 Max Min Hold key 10 Channel 1 Channel 2 select key 11 Rotary function selection switch for Channel 2 12 Rotary function selection switch for Channel 1 13 Common input jack 14 Channel 1 V mV Ω Cap Diode TTL input jack 15 Channel 2 V mV mA µA input jack 16 10A input jack 1 4 5 6 9 10 12 13 14 2 3 7 8 11 15 16 ...

Page 5: ...Current Measurements Channel 2 only Note When making single channel current measurements set the Channel 1 rotary switch to the OFF position CAUTION Do not make 20A current measurements for longer than 30 seconds Exceeding 30 seconds may cause damage to the meter and or the test leads 1 Insert the black test lead into the negative COM jack 2 For current measurements up to 6000 A set the Channel 2 ...

Page 6: ...stance is 40 an audible tone will sound Capacitance Measurements Note When measuring capacitance or diodes Channel 2 is automatically disabled Note If auto range is selected the range is 6000 counts If manual range is selected the range is extended to 9999 counts 1 Insert the black lead into the negative COM jack and the red test lead into the Channel 1 V mV CAP jack 2 Set the function switch to t...

Page 7: ...e this reading 6 The diode or junction can be evaluated as follows A If one reading displays a value and the other reading displays OL the diode is good B If both readings display OL the device is open C If both readings are very small or 0 the device is shorted Dual Channel Voltage Measurements Warning Both channels share the same ground Voltages with different grounds cannot be measured Note Fun...

Page 8: ...used as the VOLTAGE ground The two grounds are connected internally by a fuse 1 Set the Channel 1 voltage function VAC VDC mVAC or mVDC 2 Set the Channel 2 current function ACA DCA ACmA DCmA ACµA or DCµA 3 Insert the test leads into the input jacks 4 Connect the test leads in PARALLEL to the voltage circuit to be measured and connect the test leads in SERIES with the current to be measured 5 Read ...

Page 9: ...exit the mode Relative Mode ZERO The Relative Mode permits the user to store the current measurement as a reference value and compare the reference value to subsequent readings In Relative mode the meter displays Actual reading minus the Relative reference value Press the ZERO key to enter the Relative mode The triangular Relative icon and ZERO will appear on the display The display will read zero...

Page 10: ...ch the desired rate 5 Hold the REC button for 2 seconds to return to the DMM function Clearing Memory There are three methods to clear the memory 1 Hold the REC button and turn the power on The memory will clear and the top display will show the sampling rate in seconds 2 Press the Clear Data Logger Memory button in the software datalogger screen 3 Send a CNTL C via the rs232 interface Start and S...

Page 11: ...y 10 708 records for each channel Over range indication OL appears on the LCD Low battery indication Battery symbol appears on the LCD Power supply 9V Battery Battery life 100 hours approx Operating Temperature 14 to 104 o F 10 to 40 o C Operating Humidity less than 85 RH Storage Temperature 4 to 140 o F 20 to 60 o C Storage Humidity less than 75 RH Dimensions 8 15 x 4 x 1 85 207 x 101 x 47mm Weig...

Page 12: ...AC Voltage Manually select the range to be tested short the meter input and then zero the reading by pressing the ZERO button this applies to Channel 1 and Channel 2 before performing 60mV and 600mV tests Accuracy note The accuracy specifications for ACV shown in the table above apply to Channel 1 only To calculate the Channel 2 accuracy add an additional 0 05 Function Range Accuracy 20Hz 45Hz Acc...

Page 13: ...0 1 10dgts 1 0000A 0 0001A 0 1 10dgts 10 000A 0 001A 0 3 10dgts 20A for maximum 30 seconds Notes for DC Current The 10A terminal is protected by a 20A fast blow fuse The uA and mA terminals are protected by a 1A fast blow fuse Function Range ACA Resolution Accuracy 50 60Hz Accuracy 45Hz 1KHz AC Current 600 00µA 0 01µA 0 3 20dgts 0 4 20dgts 6000 0µA 0 1µA 0 3 20dgts 0 4 20dgts 60 000mA 0 001mA 0 3 ...

Page 14: ...ution Accuracy Resistance 999 99Ω 0 01Ω 0 19 8dgts 9 9999KΩ 0 0001KΩ 0 09 3dgts 99 999KΩ 0 001KΩ 0 09 3dgts 999 99KΩ 0 01KΩ 0 09 3dgts 9 9999MΩ 0 0001MΩ 0 2 6dgts 40 000MΩ 0 001MΩ 1 6dgts Capacitance auto range 60 00nF 0 01nF 0 8 5dgts 600 0nF 0 1nF 1 5 5dgts 6 000µF 0 001µF 1 5 5dgts 60 00µF 0 01µF 2 0 5dgts 490 0µF 0 1µF 3 5 5dgts Capacitance manual range 99 99nF 0 01nF 0 8 5dgts 999 9nF 0 1nF 1...

Page 15: ...DRY If it gets wet wipe it off 2 USE AND STORE THE METER IN NORMAL TEMPERATURES Temperature extremes can shorten the life of the electronic parts and distort or melt plastic parts 3 HANDLE THE METER GENTLY AND CAREFULLY Dropping it can damage the electronic parts or the case 4 KEEP THE METER CLEAN Wipe the case occasionally with a damp cloth DO NOT use chemicals cleaning solvents or detergents 5 U...

Page 16: ...llips head screwdriver 4 Insert the battery into battery holder observing the correct polarity 5 For fuse replacement gently remove the old fuse and install the new fuse into the holder Always use a fuse of the proper size and value 6 Put the rear cover back in place Secure with the screw WARNING To avoid electric shock do not operate the meter until the battery cover is in place and fastened secu...

Page 17: ... or consequential damages FLIR s total liability is limited to repair or replacement of the product The warranty set forth above is inclusive and no other warranty whether written or oral is expressed or implied Calibration Repair and Customer Care Services FLIR Systems Inc offers repair and calibration services for the Extech Instruments products we sell NIST certification for most products is al...

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