Fluke 377 FC

General specifications

General Maximum Voltage between any Terminal and Earth Ground

1000 V

Battery

Type

2 AA IEC LR6 alkaline

Life

200 hour

Display

Dual readout

Automatic Power Off

20 minutes

Electrical

AC Current: Jaw

Range

999.9 A

Resolution

0.1 A

Accuracy

2 % ±5 digits (45 Hz to 66 Hz)

Crest Factor (50/60 Hz)

3 @ 500 A
2.5 @ 600 A
1.42 @ 1000 A
Add 2 % for C.F. >2

AC Current: Flexible Current Probe

Range

2500 A

Resolution

1 A (≤2500 A) 0.1 A (≤999.9 A)

Accuracy

3 % ±5 digits (5 Hz to 500 Hz)

Crest Factor (50/60Hz)

3.0 at 1100 A
2.5 at 1400 A
1.42 at 2500 A
Add 2 % for C.F. >2

Position Sensitivity

Distance from Optimum

i2500-10 Flex

i2500-18 Flex

Error

A

0.5 in (12.7 mm)

1.4 in (35.6 mm)

± 0.5 %

B

0.8 in (20.3 mm)

2.0 in (50.8 mm)

± 1.0 %

C

1.4 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

Range

999.9 A

Resolution

0.1 A

Accuracy

2 % ±5 digits1

[1]When using the ZERO function to compensate for offsets

AC Voltage: Field Sense

Range

1000 V

Resolution

1 V (≤1000V)

Accuracy

≤4/0 AWG

3 % ±5 digits (45 Hz to 66 Hz)

≥4/0 AWG

5 % ±5 digits (45 Hz to 66 Hz)

Position wire as close as possible to jaw opening (see illustration).

AC Voltage: Test Leads

Range

600.0 V 1000 V

Resolution

0.1 V (≤600.0 V)
1 V (≤1000 V)

Accuracy

1 % ±5 digits (20 Hz to 500 Hz)

DC Voltage

Range

600.0 V
1000 V

Resolution

0.1 V (≤600.0 V)
1 V (≤1000 V)

Accuracy

1 % ±10 digits

mV dc

Range

500.0 mV

Resolution

0.1 mV

Accuracy

1 % ±5 digits

Amps Frequency: Jaw

Range

45 Hz to 66 Hz

Resolution

0.1 Hz

Accuracy

0.5 % ±5 digits

Trigger Level

5 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

Range

5.0 Hz to 500.0 Hz

Resolution

0.1 Hz

Accuracy

0.5 % ±5 digits

Trigger Level

5 Hz to 20 Hz, ≥25 A
20 Hz to 100 Hz, ≥20 A
100 Hz to 500 Hz,≥25 A

Resistance

Range

60.00 kΩ
6000 Ω
600.0 Ω

Resolution

0.1 Ω (≤600.0 Ω)
1 Ω (≤6000 Ω)
10 Ω (≤60.00 kΩ)

Accuracy

1 % ±5 digits

Capacitance

Range

1000 μF

Resolution

0.1 μF (≤100.0 μF)
1 μF (≤1000 μF)

Accuracy

1 % ±4 digits

Mechanical

Size (L x W x H)

274 mm x 86 mm x 47 mm

Weight (with Batteries)

463 g

Jaw Opening

34 mm

Flexible Current Probe Diameter

7.5 mm

Flexible Current Probe Cable Length (head to electronics connector)

1.8 m

Rogowski Coil Length

450 mm

Environmental

Operating Temperature

-10 °C to 50 °C

Storage Temperature

-40 °C to 60 °C

Operating Humidity (without condensation)

Non condensing (<10 °C)
≤90 % RH (10 °C to 30 °C)
≤75 % RH (30 °C to 40 °C)
≤45 % RH (40 °C to 50 °C)

Temperature Coefficients

Add 0.1 x specified accuracy for each degree C >28 °C or <18 °C

Ingress Protection

IEC 60529: IP30 (jaw closed)

Operating Altitude

2000 m

Storage Altitude

12 000 m

Electromagnetic Compatibility (EMC)

International

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

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.

Class B: Equipment is suitable for use in domestic establishments and in establishments directly connected to a low voltage power supply network which supplies buildings used for domestic purposes.
Emissions that exceed the levels required by CISPR 11 can occur when the equipment is connected to a test object.

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.