The Fluke 437 Series II 400Hz Power Quality and Energy Analyzer is designed specifically for the defense and avionics industries. Capable of measuring up to 400 Hz, the 437 II is a must-have for those working in submarines, aircrafts, and other transport applications.

Applications

400 Hz measurement – capture power quality measurements for avionic and military power systems. PowerWave data capture – capture fast RMS values to see every waveform so you can determine how the voltage, current and frequency values are interacting. Power inverter efficiency – measure both ac power and dc power, in and out, to monitor the efficiency of inverters. Energy monetization – calculate the fiscal cost of energy waste due to poor power quality. Energy assessment– quantify the before and after installation improvements in energy consumption to justify energy saving devices. Frontline troubleshooting – quickly diagnose problems on-screen to get your operation back online. Predictive maintenance – detect and prevent power quality issues before they cause downtime. Long-term analysis – uncover hard-to-find or intermittent issues. Load studies – verify electrical system capacity before adding loads.

 

Product specifications
	Model	Measurement range	Resolution	Accuracy
Volt
Vrms (ac+dc)	434-II	1 V to 1000 V phase to neutral	0.1 V	± 0.5% of nominal voltage****
	435-II and 437-II	1 V to 1000 V phase to neutral	0.01 V	± 0.1% of nominal voltage****
Vpk		1 Vpk to 1400 Vpk	1 V	5% of nominal voltage
Voltage Crest Factor (CF)		1.0 > 2.8	0.01	± 5 %
Vrms½	434-II	1 V to 1000 V phase to neutral	0.1 V	± 1% of nominal voltage
	434-II and 435-II		0.1 V	± 0.2% of nominal voltage
Vfund	434-II	1 V to 1000 V phase to neutral	0.1 V	± 0.5% of nominal voltage
	435-II and 437-II		0.1 V	± 0.1% of nominal voltage
Amps (accuracy excluding clamp accuracy)
Amps (ac +dc)	i430-Flex 1x	5 A to 6000 A	1 A	± 0.5% ± 5 counts
	i430-Flex 10x	0.5 A to 600 A	0.1 A	± 0.5% ± 5 counts
	1mV/A 1x	5 A to 2000 A	1A	± 0.5% ± 5 counts
	1mV/A 10x	0.5 A A to 200 A (ac only)	0.1 A	± 0.5% ± 5 counts
Apk	i430-Flex	8400 Apk	1 Arms	± 5 %
	1mV/A	5500 Apk	1 Arms	± 5 %
A Crest Factor (CF)		1 to 10	0.01	± 5 %
Amps½	i430-Flex 1x	5 A to 6000 A	1 A	± 1% ± 10 counts
	i430-Flex 10x	0.5 A to 600 A	0.1 A	± 1% ± 10 counts
	1mV/A 1x	5 A to 2000 A	1A	± 1% ± 10 counts
	1mV/A 10x	0.5 A A to 200 A (ac only)	0.1 A	± 1% ± 10 counts
Afund	i430-Flex 1x	5 A to 6000 A	1 A	± 0.5% ± 5 counts
	i430-Flex 10x	0.5 A to 600 A	0.1 A	± 0.5% ± 5 counts
	1mV/A 1x	5 A to 2000 A	1A	± 0.5% ± 5 counts
	1mV/A 10x	0.5 A A to 200 A (ac only)	0.1 A	± 0.5% ± 5 counts
Hz
Hz	Fluke 434 @ 50 Hz nominal	42.50 Hz to 57.50 Hz	0.01 Hz	± 0.01 Hz
	Fluke 434 @ 60 Hz nominal	51.00 Hz to 69.00 Hz	0.01 Hz	± 0.01 Hz
	Fluke 435/7 @ 50 Hz nominal	42.500 Hz to 57.500 Hz	0.001 Hz	± 0.01 Hz
	Fluke 435/7 @ 60 Hz nominal	51.000 Hz to 69.000 Hz	0.001 Hz	± 0.01 Hz
	Fluke 437 @ 400 Hz nominal	340.0 Hz to 460.0 Hz	0.1 Hz	± 0.1 Hz
Power
Watts (VA, var)	i430-Flex	max 6000 MW	0.1 W to 1 MW	± 1% ± 10 counts
	1 mV/A	max 2000 MW	0.1 W to 1 MW	± 1% ± 10 counts
Power factor (Cos j/DPF)		0 to 1	0.001	± 0.1% @ nominal load conditions
Energy
kWh (kVAh, kvarh)	i430-Flex 10x	Depends on clamp scaling and V nominal		± 1% ± 10 counts
Energy loss	i430-Flex 10x	Depends on clamp scaling and V nominal		± 1% ± 10 counts Excluding line resistance accuracy
Harmonics
Harmonic order (n)		DC, 1 to 50 Grouping: Harmonic groups according to IEC 61000-4-7
Inter-harmonic order (n)		OFF, 1 to 50 Grouping: Harmonic and Interharmonic subgroups according to IEC 61000-4-7
Volts	%f	0.0 % to 100 %	0.1 %	± 0.1% ± n x 0.1 %
	%r	0.0 % to 100 %	0.1 %	± 0.1% ± n x 0.4 %
	Absolute	0.0 to 1000 V	0.1 V	± 5% *
	THD	0.0 % to 100 %	0.1 %	± 2.5 %
Amps	%f	0.0 % to 100 %	0.1 %	± 0.1% ± n x 0.1%
	%r	0.0 % to 100 %	0.1 %	± 0.1% ± n x 0.4 %
	Absolute	0.0 to 600 A	0.1 A	± 5% ± 5 counts
	THD	0.0 % to 100 %	0.1 %	± 2.5 %
Watts	%f or %r	0.0 % to 100 %	0.1 %	± n x 2%
	Absolute	Depends on clamp scaling and V nominal	—	± 5% ± n x 2 % ± 10 counts
	THD	0.0 % to 100 %	0.1 %	± 5 %
Phase Angle		-360° to +0°	1°	± n x 1°
Flicker
Plt, Pst, Pst(1min) Pinst		0.00 to 20.00	0.01	± 5 %
Unbalance
Volts	%	0.0 % to 20.0 %	0.1 %	± 0.1 %
Amps	%	0.0 % to 20.0 %	0.1%	± 1 %
Mains signaling
Threshold levels		Threshold, limits and signaling duration is programable for two signaling frequencies	—	—
Signaling frequency		60 Hz to 3000 Hz	0.1 Hz
Relative V%		0 % to 100 %	0.10 %	± 0.4 %
Absolute V3s (3 second avg.)		0.0 V to 1000 V	0.1 V	± 5 % of nominal voltage

 

General specifications
Case	Design Rugged, shock proof with integrated protective holster Drip and dust proof IP51 according to IEC60529 when used in tilt stand position Shock and vibration Shock 30 g, vibration: 3 g sinusoid, random 0.03 g 2 /Hz according to MIL-PRF-28800F Class 2
Display	Brightness: 200 cd/m 2 typ. using power adapter, 90 cd/m 2 typical using battery power Size: 127 mm x 88 mm (153 mm/6.0 in diagonal) LCD Resolution: 320 x 240 pixels Contrast and brightness: user-adjustable, temperature compensated
Memory	8GB SD card (SDHC compliant, FAT32 formatted) standard, upto 32GB optionally Screen save and multiple data memories for storing data including recordings (dependent on memory size)
Real-time clock	Time and date stamp for Trend mode, Transient display, System Monitor and event capture

 

Environmental
Operating temperature	0 °C ~ +40 °C; +40 °C ~ +50 °C excl. battery
Storage temperature	-20 °C ~ +60 °C
Humidity	+10 °C ~ +30 °C: 95% RH non-condensing +30 °C ~ +40 °C: 75% RH non-condensing +40 °C ~ +50 °C: 45% RH non-condensing
Maximum operating altitude	Up to 2,000 m (6666 ft) for CAT IV 600 V, CAT III 1000 V Up to 3,000 m (10,000 ft) for CAT III 600 V, CAT II 1000 V Maximum storage altitude 12 km (40,000 ft)
Electro-Magnetic-Compatibility (EMC)	EN 61326 (2005-12) for emission and immunity
Interfaces	mini-USB-B, Isolated USB port for PC connectivity SD card slot accessible behind instrument battery
Warranty	Three years (parts and labor) on main instrument, one year on accessories