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January 2021

©2021 Fluke Corporation. All rights reserved.
All product names are trademarks of their respective companies.

377/377 FC

378/378 FC

Clamp Meter

Users Manual

Summary of Contents for 377

Page 1: ...January 2021 2021 Fluke Corporation All rights reserved All product names are trademarks of their respective companies 377 377 FC 378 378 FC Clamp Meter Users Manual ...

Page 2: ...ur nearest Fluke authorized service center to obtain return authorization information then send the product to that service center with a description of the difficulty postage and insurance prepaid FOB Destination Fluke assumes no risk for damage in transit Following warranty repair the product will be returned to Buyer transportation prepaid FOB Destination If Fluke determines that failure was ca...

Page 3: ...C 5 Radio Frequency Data 5 Fluke Connect Mobile App 5 Battery 6 Features Controls 7 Display 8 Power 9 Auto Power Off 9 Backlight 9 Power On Options 10 Basic Measurements 11 Hazardous Voltage Indicator 11 FieldSense Measurement 11 FieldSense AC Current Voltage and Frequency 11 L1 L2 L3 12 Power Quality Indicator 378 378 FC 13 Table of Contents ...

Page 4: ...Capacitance 14 DC Current 14 iFlex Probe 14 Measurement Features 16 Display Hold 16 MIN MAX AVG Measurements 16 Inrush Current 16 Data Logging 377 FC 378 FC 17 Clear Memory 377 FC 378 FC 17 Firmware Update 377 FC 378 FC 17 Firmware Version 17 Maintenance 18 How to Clean the Case 18 Environmental 18 Service 18 ...

Page 5: ...age dc current and voltage inrush current resistance capacitance frequency and dc millivolts The included iFlex detachable flexible current probe expands the measurement range to 2500 A ac The iFlex allows measurements of awkward sized conductors and improved wire access The illustrations in this manual show the 378 FC Table 1 is a list of features available for each model Table 1 Features by Mode...

Page 6: ...pplement go to our website Fluke Corporation P O Box 9090 Everett WA 98206 9090 1 425 446 5500 fluke info fluke com Safety Information General safety information is in the printed Safety Information document that ships with the Product and at www fluke com More specific safety information is listed where applicable Specifications Complete specifications are at www fluke com See the 377 377 FC 378 ...

Page 7: ...duct Use Table 3 to order additional accessories Table 2 Standard Equipment Item Model Number Description varies Clamp Meter i2500 18 iFlex Flexible Current Probe 18 in 48 cm TPAK Hanging Kit AC285 Alligator Clip black TL224 Insulated Test Lead Set TP175 Test Probe Set 37x Carry Case 1 2 3 4 6 7 5 ...

Page 8: ...ble 3 Accessories Model Number Description C550 Tool Bag AC87 Heavy Duty Bus Bar Clip Set one pair red and black AC89 Heavy Duty Insulation Piercing Test Clip TL27 Heavy Duty Test Lead Set TL75 Hard Point Test Lead Set one pair red and black ...

Page 9: ...requency Fluke Connect 377 FC 378 FC Fluke Connect software may not be available in all regions supports the Clamp to wirelessly connect to a mobile app The app shows the measurements and other data on your smartphone or tablet display You can share this data with your team and save collected measurements and calculations to the Fluke Connect Cloud Fluke Connect uses low power 802 15 4 wireless ra...

Page 10: ...changed ensure that the calibration seal in the battery compartment is not damaged If damaged the Product may not be safe to use Return the Product to Fluke for replacement of the seal W Caution To prevent damage to the battery Repair the Product before use if the battery leaks Do not expose battery to heat sources or high temperature environments such as an unattended vehicle in the sun Always op...

Page 11: ...rrent voltage and frequency measurement functions Push 2 s to turn on turn off the L1 L2 L3 measurement function INRUSH push to enter inrush mode Push a second time to exit inrush mode Integration time is 100 ms Push 2 s to start data logging function with the Fluke Connect mobile app 377 378 B extends the function selection to yellow items on the control knob 377 FC 378 FC F turn on the Fluke Con...

Page 12: ...surement Jaw measurement iFlex measurement Fluke Connect feature is on FieldSense measurement Remaining memory 377 FC 378 FC Inrush measurement Log mode is active 377 FC 378 FC Hold mode is active MinMax mode is active Battery status Min Max or Avg measurement indication Continuity indication Power Quality indication PQR Current measurement Line to line calculation Voltage resistance capacitance f...

Page 13: ...me operation To disable auto power off see Power On Options Note Auto power off is always disabled when you use the Min Max Avg function Backlight The display on the Clamp includes a backlight that improves the readability in dim work areas FC models Hold B for 2 seconds to turn on the backlight Hold B for 2 seconds to turn off the backlight Non FC models Push to toggle on toggle off the backlight...

Page 14: ...xits the option mode but retains any changes to the settings 3 Push B to go through the options 4 Push M to change a setting 5 Release e to exit the options mode All power on options are canceled when you turn off the Clamp with the exception of PQ Sensitivity setting Option Display Beeper Enabled bEEP On Beeper Disabled bEEP OFF Auto Backlight On Backlight turns off after 2 minutes of no use 8CLt...

Page 15: ...age and current measurements at the same time Note All FieldSense measurements require a ground lead connection FieldSense AC Current Voltage and Frequency To make the measurement 1 Insert the ground lead into the COM input and attach the alligator clip to ground 2 Rotate the control knob to U The display shows the U icon 3 Use the jaw release to open the jaw and position the Clamp around the cond...

Page 16: ...he display to settle You will hear a beep and x shows on the display 2 Move the Clamp jaw to the second conductor within 10 seconds Wait for the measurement on the display to settle You will hear a beep and y shows on the display 3 Move the Clamp jaw to the next conductor within 10 seconds Wait for the measurement on the display to settle You will hear a beep and z shows on the display When the x ...

Page 17: ...ge 1 Turn control knob to V or N 2 Connect the black test lead to the COM terminal and the red test lead to the VX terminal 3 Touch the probes to the test points of the circuit The display shows the measurement Note Use B to toggle on toggle off the mV function shown in yellow at the control knob position Resistance Continuity To measure resistance or continuity 1 Turn the control knob to D 2 Remo...

Page 18: ...erly discharge DC Current To measure dc current 1 Turn control knob to Y 2 Push B to compensate for outside influences The display shows C to indicate that the measurement is from the jaw When the current measurement is 0 5 A the center dot in the icon flashes For current measurements 0 5 A the center dot in the icon is steady iFlex Probe XW Warning To avoid electrical shock do not apply or remove...

Page 19: ...rrent measurements 0 5 A the center dot is steady The display shows the measurement If the iFlex Probe does not work as expected Make sure that the coupling system is connected and closed correctly or look for any damage If any foreign material is present the coupling system will not close properly Inspect the cable between the iFlex Probe and the Clamp for any damage Check that the control knob i...

Page 20: ...erage readings of a given output signal over an extended time The Clamp beeps when it senses a new high value or new low value This function works in current voltage and frequency modes 1 Push M to enter the Min Max Avg mode The maximum reading shows on the display 2 Continue to push M to select between the maximum minimum average and live readings The cycle continues each time you push M 3 To exi...

Page 21: ... Options Firmware Update 377 FC 378 FC Firmware updates are available for Clamps that have the Fluke Connect feature The Fluke Connect mobile app shows a notification if a firmware update is available when the unit is connected to the app To update 1 Make sure the Product has at least 50 battery power available 2 Make sure you download all the logged data before you update the firmware 3 In the ap...

Page 22: ...it boards These components must be disposed of specifically when the Product is at the end of its use The manufacturer offers to take back the Product from the customer to ensure that the Product is disposed of in an environmentally friendly manner when it is at the end of its use See Contact Fluke for more information Service An authorized Fluke Calibration service center should service the Produ...

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