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Fluke 393 FC - Solar Clamp Meter CAT III 1500 V

Solar Clamp Meter CAT III 1500 V


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Category : Clamp Meter

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Users Manual Datasheet


The Fluke 393 FC CAT III 1500 V True-rms Solar Clamp Meter with iFlex is designed for solar photovoltaic (PV) installation technicians and maintenance professionals who work in high voltage DC environments: PV arrays, wind power, electric railways, data centers battery banks for uninterruptible power supplies. The clamp meter will measure up to 1500 V DC and 1000 V AC with test leads, and up to 999.9 A DC or AC through the clamp jaw. The included iFlex flexible current probe extends AC current measurements up to 2500 A. The 393 has a thin jaw, giving you access to cables in crowded combiner boxes. Plus, the test leads are designed with your work in mind, and are also rated to CAT III 1500 V DC.

  • IP54 rated, ideal for work outdoors including PV panel testing
  • DC power measurement, showing readings in kVA
  • Audio Polarity indicator helps prevent accidental miswires
  • Visual Continuity turns provide a bright green light in the display, ideal when working in dark and noisy environments
  • Logging and reporting of test results via Fluke Connect software
  • When measuring ac current the included iFlex flexible current probe gives you unparalleled access to cable is tight spaces.  The iFlex probe can be twisted through extremely small spaces and provide accurate current measurements.



Maximum voltage between any Terminal and Earth Ground
AC1000 V
DC1500 V
Batteries2 AA IEC LR6 alkaline
Display2 AA IEC LR6 alkaline
DisplayDual display with backlight
Automatic Power Off20 minutes



-Accuracy is specified for 1 year after calibration, at operating temperatures of 18 °C to 28 °C, relative humidity at 0 % to 75 %. Accuracy specifications take the form of: ±([% of Reading] + [Number of Least Significant Digits]).
Temperature Coefficients Add 0.1 x specified accuracy for each °C > 28 °C or < 18 °C
AC Current: Jaw
Range999.9 A
Resolution 0.1 A
Accuracy 2 % + 5 digits (10 Hz to 100 Hz)
2.5 % + 5 digits (100 Hz to 500 Hz)
Crest Factor (50/60 Hz)2.5 @600.0 A
3.0 @500.0 A
1.42 @999.9 A
Add 2 % for C.F. >2
AC Current: Flexible Current Probe
Range999.9 A
2500 A
Resolution0.1 A (≤999.9 A)
1 A (≤2500 A)
Accuracy3 % RD + 5 digits (10 Hz to 500 Hz)
Crest Factor (50/60Hz) 2.5 @1400 A
3.0 @1100 A
1.42@2500 A
Add 2 % for C.F. >2
Distance from Optimum
Position Sensitivity378_fc_position_sinsitivity.jpg
Distance from Optimumi2500-10 Flexi2500-18 FlexError
A0.5 in (12.7 mm)1.4 in (35.6 mm)±0.5 %
B0.8 in (20.3 mm)2.0 in (50.8 mm)±1.0 %
C1.4 in (35.6 mm)2.5 in (63.5 mm)±2.0 %

Measurement uncertainty assumes centralized primary conductor at optimum position, no external electrical or magnetic field, and within operating temperature range.

DC Current
Range999.9 A
Resolution0.1 A
Accuracy2 % RD + 5 digits[1]

[1] When using the ZERO (B) function to compensate for offsets.

AC Voltage
Range600.0 V
1000 V
Resolution0.1 V (≤600.0 V)
1 V (≤1000 V)
Accuracy1 % RD + 5 digits (20 Hz to 500 Hz)
DC Voltage
Range600.0 V
1500 V
Resolution0.1 V (≤600.0 V)
1 V (≤1500 V)
Accuracy1 % RD + 5 digits
mV dc
Range0.1 mV
Accuracy1 % RD + 5 digits
Amps Frequency: Jaw
Range5.0 Hz to 500.0 Hz
Resolution0.1 Hz
Accuracy0.5 % RD + 5 digits
Trigger Level5 Hz to 10 Hz, ≥10 A
10 Hz to 100 Hz, ≥5 A
100 Hz to 500 Hz, ≥10 A
Amps Frequency: Flexible Current Probe
Range5.0 Hz to 500.0 Hz
Resolution0.1 Hz
Accuracy0.5 % RD + 5 digits
Trigger Level5 Hz to 20 Hz, ≥25 A
20 Hz to 100 Hz, ≥20 A
100 Hz to 500 Hz, ≥25 A
Voltage Frequency
Range5.0 Hz to 500.0 Hz
Resolution0.1 Hz
Accuracy5 Hz to 20 Hz, ≥5 V
Trigger Level5 Hz to 20 Hz, ≥5 V
20 Hz to 100 Hz, ≥5 V
100 Hz to 500 Hz, ≥10 V
DC Power
Range600.0 kVA (600.0 V dc range)
1500 kVA (1500 V dc range)
Resolution0.1 kVA
1 kVA
Accuracy2 % RD + 2.0 kVA
2 % RD + 20 kVA
Range600.0 Ω
6000 Ω
60.00 kΩ
Resolution0.1 Ω (≤600.0 Ω)
1 Ω (≤6000 Ω)
0.01 kΩ (≤60.00 kΩ)
Accuracy1 % RD + 5 digits
Range100.0 μF
1000 μF
Resolution0.1 μF (≤100.0 μF)
1 μF (≤1000 μF)
Accuracy1 % RD + 5 digits
Inrush Trigger Level5 A



Size (L x W x H)281 mm x 84 mm x 49 mm
Weight (with batteries)520 g
Jaw Opening34 mm
Flexible Current Probe Diameter7.5 mm
Flexible Current Probe Cable Length
(head to electronics connector)
1.8 m



Operating Temperature-10 °C to 50 °C
Storage Temperature-40 °C to 60 °C
Operating HumidityNon condensing (<10°C)
≤90 % RH (at 10 °C to 30 °C)
≤75 % RH (at 30 °C to 40 °C)
≤45 % RH (at 40 °C to 50 °C)
Operating Altitude2000 m
Storage Altitude12 000 m
Ingress Protection (IP) RatingIEC 60529: IP54 non-operating
Electromagnetic Compatibility (EMC)

IEC 61326-1: Portable, Electromagnetic Environment, IEC 61326-2-2 CISPR 11: Group 1, Class A

Group 1: Equipment has intentionally generated and/or uses conductively-coupled radio frequency energy that is necessary for the internal function of the equipment itself.

Korea (KCC)

Class A equipment (Industrial Broadcast & Communications Equipment)

Class A: Equipment meets requirements for industrial electromagnetic wave equipment and the seller or user should take notice of it. This equipment is intended for use in business environments and not to be used in homes.

USA (FCC)47 CFR 15 subpart B. This product is considered an exempt device per clause 15.103.

Class A: Equipment is suitable for use in all establishments other than domestic and those directly connected to a low-voltage power supply network that supplies buildings used for domestic purposes. There may be potential difficulties in ensuring electromagnetic compatibility in other environments due to conducted and radiated disturbances.
Caution: This equipment is not intended for use in residential environments and may not provide adequate protection to radio reception in such environments.



GeneralIEC 61010-1, Pollution Degree 2
MeasurementIEC 61010-2-032: CAT III 1500 V / CAT IV 600 V
IEC 61010-2-033: CAT III 1500 V / CAT IV 600 V


Wireless Radio

Radio frequency certificationFCC ID: T68-FBLE, IC: 6627A-FBLE
Wireless Radio Frequency Range2400 MHz to 2483.5 MHz
Output Power<100 mW
SIMPLIFIED EU DECLARATION OF CONFORMITYHereby, Fluke declares that the radio equipment contained in this Product is in compliance with Directive 2014/53/EU. The full text of the EU declaration is available at the following Internet address:

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