Fluke 374 User manual

Technical Data
Measurement capability
• 600 A ac and dc current
measurement with fixed jaw
• 2500 A ac current mea-
surement with iFlex™
flexible current probe (sold
separately)
• 600 V ac and dc voltage
measurement
• True-rms ac voltage and
current for accurate measure-
ments on non-linear signals
• Frequency measurement to
500 Hz with both jaw and
iFlex™ (Fluke 375 only)
• Resistance measurement to
60 kΩ (Fluke 375) or 6000 Ω
(Fluke 374) with continuity
detection
• Min, max, average and inrush
recording to capture varia-
tions automatically
• 500 mV dc measurement
range to interface with other
accessories (Fluke 375 only)
• 1000 µF capacitance
measurement
Features
• iFlex™ flexible current probe
expands the measurement
range to 2500 A ac while
providing increased display
flexibility, ability to measure
awkward sized conductors
and improved wire access
• CAT IV 600V, CAT III 1000 V
safety rating
• Integrated low pass filter
(Fluke 375 only) and state
of the art signal process-
ing allows for use in noisy
electrical environments while
providing stable readings
Work horse clamps with increased
performance and flexibility
374 and 375 True-rms
AC/DC Clamp Meters
The new Fluke 374 and 375 clamp meters offer improved
performance perfect for many current measurement situa-
tions. With true-rms ac voltage and current measurements,
the Fluke 374 and 375 can read up to 600 V and 600 A in
both ac and dc modes. Additionally, both are compatible with
the new iFlex™ flexible current probe (sold separately) which
expands the measurement range to 2500 A ac and pro-
vides increased display flexibility, ability to measure around
awkward sized conductors and improved wire access.
USC
®

2 Fluke Corporation 374 and 375 True-rms AC/DC Clamp Meters
• Proprietary inrush measure-
ment technology to filter
out noise and capture motor
starting current exactly as the
circuit protection sees it
• Ergonomic design fits in your
hand and can be used while
wearing personal protective
equipment
• Large, easy to read, backlight
display automatically sets the
correct measurement range
so you do not need to change
switch positions while taking
a measurement
• Three-year warranty
• Soft carrying case
Specifications
Fluke 374 and 375 Range Max Resolution Accuracy
AC current via jaw 600 A 0.1 A 2 % ± 5 digits
AC current via iFlex™ (optional) 2500 A 0.1 A 3 % ± 5 digits
DC current 600 A 0.1 A 2 % ± 5 digits
AC voltage 600 V 0.1 V 1.5 % ± 5 digits
DC voltage 600 V 0.1 mV (375)
0.1 V (374) 1 % ± 5 digits
Resistance 60,000 Ω (375)
6000 Ω (374) 0.1 Ω1 % ± 5 digits
Frequency (375 only) 500 Hz 0.1 Hz 0.5 % ± 5 digits
Capacitance 1 µF to 1000 µF 1 µF 1 % ± 4 digits
True-rms •
Continuity •
Hold •
Backlight •
Min/Max •
Inrush •
Low pass filter Fluke 375 only
18 in iFlex™ Flexible Current Probe Optional accessory
10 in iFlex™ Flexible Current Probe Optional accessory
Wire capacity 750 MCM or 2-500 MCM
Safety rating CAT III 1000 V, CAT IV 600 V
Ordering information
374 True-rms AC/DC
Clamp Meter
375 True-rms AC/DC
Clamp Meter
Optional accessories
i2500-10 iFlex™ Flexible
Current Probe, 10 inches
i2500-18 iFlex™ Flexible
Current Probe, 18 inches
Models Feature Changes
Old model: Fluke 337
New model: Fluke 376 Includes all 337 features plus:
• CAT IV 600 V, CAT III 1000 V
• iFlex™ 2500 A ac
• 1000 V ac/dc
• mV dc
• 60 kΩ
• 1000 µF
Old model: Fluke 336
New model: Fluke 375 Includes all 336 features plus:
• CAT IV 600 V, CAT III 1000 V
• Optional iFlex™ 2500 A ac
• mV dc
• 60 kΩ
• 1000 µF
• Min/Max/Avg
New model: Fluke 374 Includes all 336 features
(except low pass filter) plus:
• CAT IV 600 V, CAT III 1000 V
• Optional iFlex™ 2500 A ac
• 1000 µF
• Min/Max/Avg
Old model: Fluke 335
New model: Fluke 374 Includes all 335 features plus:
• CAT IV 600 V, CAT III 1000 V
• Optional iFlex™ 2500 A ac
• 600 A ac/dc
• 1000 µF
• Min/Max/Avg
New model: Fluke 373 Includes all 335 features
(except inrush) plus: • CAT IV 300 V, CAT III 600 V
• 1000 µF
Old model: Fluke 334
New model: Fluke 374 Includes all 334 features plus:
• CAT IV 600 V, CAT III 1000 V
• Optional iFlex™ 2500 A ac
• True-rms
• 600 A ac/dc
• 1000 µF
• Min/Max/Avg
New model: Fluke 373 Includes all 334 features
(except inrush) plus:
• CAT IV 300 V, CAT III 600 V
• True-rms
• 1000 µF
Old model: Fluke 333
New model: Fluke 373 Includes all 333 features plus:
• CAT IV 300 V, CAT III 600 V
• True-rms
• 600 A ac
• 6000 Ω
• 1000 µF