Model : 

Fluke 1535/1537 2500V Insulation Resistance Meter (Digital High-Voltage Megohmmeter)

Fluke 1535 and Fluke 1537 performs accurate and fast insulation test, also provide advanced functions like ramp voltage, polarity index, dielectric absorption ratio, and dielectric discharge (Fluke 1537) test, which helps you to effectively find defects such as insulation breakdown and severe overheating and equipment ageing. 

Fluke 1535 features:

• Up to 500 G? insulation resistance measurement range
• Fast-measurement design, faster & stable resistance reading, higher efficiency
• Automatic calculation of polarization index (PI) and dielectric absorption ratio (DAR)
• Low power design meets the requirements of high-intensity work: up to 1300 times of 2500 V measurement, and up to 6500 times of 250 V measurements*
• High-safety design with dangerous voltage alarm function, and complies with CAT IV 600V standard and China power industry specifications DLT845
• The new high-reliability design, all specifications are met even under the environment of 50 °C temperature and 80% RH; all probes and corresponding ports are tested for 30,000 mating test

Fluke 1537 adds the following features based-on the above features:

• AC/DC voltage and resistance measurement
• Short-circuit current >5 mA, faster and more accurate
• Fine-tunable test voltage: 250 V to 2500 V,100 V step/li>
• Step mode with linear increment test voltage (100 V/s), breakdown voltage indication
• Automatic calculation of dielectric discharge rate (DD), find insulation problems that are not easily detectable in multilayer insulation
• User-defined label, timing test, measurement results storage
• Download data with provided PC software
• 3 years warranty

 

Specification

General Specifications
Display	73.5 mm x 104 mm
Battery	8 AA alkaline cells, IEC LR6
Dimensions (H x W x L)	184 mm x 211 mm x 93 mm
Weight	1.3 kg
Temperature
Operating temperature	-10 °C  to +50 °C
Storage temperature	-20 °C to +60 °C
Operating humidity	Non-condensing (<10 °C)
	≤80 % RH (10 °C to 30 °C)
	≤50 % RH (30 °C to 50 °C)
Altitude
Operating altitude	2000 m
Storage altitude	12000 m
Overvoltage category	CAT IV 600 V
Safety
General	IEC 61010-1, pollution degree 2
	IEC 61010-2-033?CAT IV 600 V
	IEC 61557-1
Insulation resistance measurement	IEC 61557-2
Effectiveness of protective measures	IEC 61557-16
IP Rating	IEC 60529 IP40
Electromagnetic Compatibility (EMC)
International	IEC 61326-1: Electromagnetic environment for portable equipments
	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.

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.

Electrical Specifications
The meter’s accuracy is specified for one year after calibration at operating temperatures of 10°C to 30°C. For operating temperatures outside the range (-10°C to +10°C and +30°C to +50°C), add ± 0.25% per °C, except on the 20% bands, add ± 1% per °C.
Insulation resistance testing
Test voltage	Range	Resolution	Accuracy
250 V	<200 kΩ	Unspecified	Unspecified
	200 kΩ to 500 kΩ	1 kΩ	0.05
	0.50 MΩ to 5.00 MΩ	10 kΩ	0.05
	5.0 MΩ to 50.0 MΩ	100 kΩ	0.05
	50 MΩ to 500 MΩ	1 MΩ	0.05
	0.50 GΩ to 5.00 GΩ	10 MΩ	0.05
	5.0 GΩ to 50.0 GΩ	500 MΩ	0.2
	>50 GΩ	Unspecified	Unspecified
500 V	<200 kΩ	Unspecified	Unspecified
	200 kΩ to 500 kΩ	1 kΩ	0.05
	0.50 MΩ to 5.00 MΩ	10 kΩ	0.05
	5.0 MΩ to 50.0 MΩ	100 kΩ	0.05
	50 MΩ to 500 MΩ	1 MΩ	0.05
	0.50 GΩ to 5.00 GΩ	10 MΩ	0.05
	5.0 GΩ to 10.0 GΩ	100 MΩ	0.05
	10.0 GΩ to 50.0 GΩ	500 MΩ	0.2
	50 GΩ to 100 GΩ	5 GΩ	0.2
	>100 GΩ	Unspecified	Unspecified
1000 V	<200 kΩ	Unspecified	Unspecified
	200 kΩ to 500 kΩ	1 kΩ	0.05
	0.50 MΩ to 5.00 MΩ	10 kΩ	0.05
	5.0 MΩ to 50.0 MΩ	100 kΩ	0.05
	50 MΩ to 500 MΩ	1 MΩ	0.05
	0.50 GΩ to 5.00 GΩ	10 MΩ	0.05
	5.0 GΩ to 0.0 GΩ	100 MΩ	0.05
	20.0 GΩ to 50.0 GΩ	500 MΩ	0.2
	50 GΩ to 200 GΩ	5 GΩ	0.2
	>200 GΩ	Unspecified	Unspecified
2500 V	<200 kΩ	Unspecified	Unspecified
	200 kΩ to 500 kΩ	1 kΩ	0.05
	0.50 MΩ to 5.00 MΩ	10 kΩ	0.05
	5.0 MΩ to 50.0 MΩ	100 kΩ	0.05
	50 MΩ to 500 MΩ	1 MΩ	0.05
	0.50 GΩ to 5.00 GΩ	10 MΩ	0.05
	5.0 GΩ to 50.0 GΩ	100 MΩ	0.05
	50 GΩ to 500 GΩ	5 GΩ	0.2
	>500 GΩ	Unspecified	Unspecified

Bar graph range: 0 ? to 1 T? Insulation test voltage accuracy: -0 %, +10 % @ 1 mA load current Charging rate for capacitive load: 5 s/μF Discharging rate for capacitive load: 1.5 s/μF

	Range	Accuracy
Leakage current measurement	1 nA to 2 mA	±(20 % + 2 nA)
Capacitance measurement	0.01 μF to 2.00 μF	±(15 % rdg + 0.03 μF)
Test voltage for insulation resistance	250 V to 2500 V	±(3 % + 3 V)

Warning for energized circuit	Warning range
	>30 V

Timer (F1537 only)	Range	Resolution
	0 to 99 min	Setting: 1 min
		Alert: 1 s

Short circuit current
F1535	>2mA
F1537	>5mA

ACV/DCV/resistance measurement (1537 only)
Function	Range	Resolution	Accuracy ±(% rdg + dgt)
VAC	0 V to 600.0 V	0.1 V	±(2 % +10) ?45 Hz to 500 Hz?
VDC	0 V to 600.0 V	0.1 V	±(2 % +10)
Resistance	0Ω to 600.0Ω	0.1Ω	±(2 % +10)
	600Ω to 6000Ω	1Ω
	6.00 kΩ to 60.00kΩ	10Ω