Fluke 1503 Insulation Resistance Tester — 1000V | 2000MΩ | CAT IV 600V | Earth Bond
The Fluke 1503 Insulation Resistance Tester is a reliable, easy-to-use insulation tester designed for electricians, maintenance engineers and electrical contractors. Supporting test voltages of 500V and 1000V with insulation resistance measurement up to 2000MΩ, the Fluke 1503 is ideal for testing motors, cables, switchgear and electrical installations to ensure system safety and compliance.
What's in the Box
Fluke 1503 Insulation Resistance Meter x1
TL224 Test Leads
TP74 Test Probes
Alligator Clips — Red (PN 1958654) & Black (PN 1958646)
Remote Test Probe
Protective Holster
User Manual
Four AA Alkaline Batteries (NEDA 15A / IEC LR6)
AC/DC Voltage Measurement
Parameter
Details
Range
600.0V
Resolution
0.1V
Accuracy (50Hz to 400Hz) ±(% of Rdg + Digits)
±(2%+3)
Input Impedance
3MΩ (nominal), <100pF
Common Mode Rejection Ratio (1kΩ unbalanced)
>60dB at DC, 50 or 60Hz
Overload Protection
600V rms or DC
Earth Bond Resistance Measurement
Range
Resolution
20.00Ω
0.01Ω
200.0Ω
0.1Ω
2000Ω
1.0Ω
20.00kΩ
0.01kΩ
Parameter
Details
Accuracy
±(1.5%+3)
Overload Protection
2V rms or DC
Open Circuit Test Voltage
>4.0V, <8V
Short Circuit Current
>200.0mA
Insulation Specifications
Parameter
Details
Measurement Range
0.01MΩ to 2000MΩ
Test Voltage
500V, 1000V
Test Voltage Accuracy
+20%, -0%
Short Circuit Current
1mA nominal
Auto Discharge
Discharge time <0.5 second for C = 1μF or less
Live Circuit Indicator
Inhibit test if terminal voltage >30V prior to initialization of test
Maximum Capacitive Load
Operable with up to 1μF load
Measure Accuracy:
Test Voltage
Accuracy
500V
±(1.5%+5)
1000V
±(1.5%+5) to 2000MΩ; ±(10%+3) above 2000MΩ
General Specifications
Parameter
Details
Maximum Voltage at Any Terminal
600V AC rms or DC
Storage Temperature
-40°C to 60°C (-40°F to 140°F)
Operating Temperature
-20°C to 55°C (-4°F to 131°F)
Temperature Coefficient
0.05 x (specified accuracy) per °C for temperatures <18°C or >28°C (<64°F or >82°F)
Relative Humidity
0% to 95% @ 10°C to 30°C (50°F to 86°F)
0% to 75% @ 30°C to 40°C (86°F to 104°F)
0% to 40% @ 40°C to 55°C (104°F to 131°F)
Vibration
Random, 2g, 5-500Hz per MIL-PRF-28800F, Class 2 instrument
Shock
1 metre drop per IEC 61010-1 2nd Edition — 6 sides, oak floor
Electromagnetic Compatibility
In RF field of 3V/M, accuracy = specified accuracy (EN 61326-1:1997)
Safety
Complies with ANSI/ISA 82.02.01 (61010-1) 2004, CAN/CSA-C22.2 NO. 61010-1-04, and IEC/EN 61010-1 2nd Edition for CAT IV 600V
Certifications
CSA per standard CSA/CAN C22.2 No. 61010.1-04; TÜV per standard IEC/EN 61010-1 2nd Edition
Batteries
Four AA batteries (NEDA 15A or IEC LR6)
IP Rating
IP40
Size (H x W x L)
5.0 x 10.0 x 20.3cm (1.97 x 3.94 x 8.00 in)
Weight
550g (1.2 lb)
Over-Range Capability
110% of range
Altitude:
Mode
Details
Operating
2000m CAT IV 600V / 3000m CAT III 600V
Non-Operating (Storage)
12,000m
Battery Life:
Usage
Details
Insulation Test Use
At least 1000 insulation tests with fresh alkaline batteries at room temperature. Standard tests of 1000V into 1MΩ with duty cycle of 5 seconds on and 25 seconds off.
Resistance Measurements
At least 2500 earth bond resistance measurements with fresh alkaline batteries at room temperature. Standard tests of 1Ω with duty cycle of 5 seconds on and 25 seconds off.
Features & Benefits
500V & 1000V Test Voltages — 0.01MΩ to 2000MΩ Range Two selectable test voltages with insulation resistance measurement up to 2000MΩ cover motor, cable, switchgear and electrical installation testing requirements.
Earth Bond Continuity — >200mA Short Circuit Current Earth bond continuity with >200.0mA short circuit current across four resistance ranges supports low-resistance earth bond testing for electrical safety compliance.
Auto-Discharge in Under 0.5 Seconds Automatically discharges capacitive voltage after insulation testing in under 0.5 seconds for capacitive loads up to 1μF — protecting operators from residual voltage hazards.
Live Circuit Indicator — Test Inhibit Above 30V Automatically inhibits insulation testing if terminal voltage exceeds 30V before test initialisation — preventing accidental testing on energised circuits.
Remote Test Probe Included remote test probe simplifies repetitive insulation testing — trigger tests from the probe end for faster field workflows.
CAT IV 600V Safety — CSA & TÜV Certified Complies with ANSI/ISA 82.02.01, CAN/CSA-C22.2 No. 61010-1-04 and IEC/EN 61010-1 CAT IV 600V, certified by both CSA and TÜV.
1000+ Insulation Test Battery Life Four AA alkaline batteries support at least 1000 insulation tests and 2500 earth bond measurements per set.
Applications
Motor insulation resistance testing
Cable and wiring insulation verification
Switchgear and distribution board testing
Electrical installation commissioning
Earth bond continuity verification
Preventive maintenance insulation surveys
Why Choose Fluke 1503?
500V and 1000V test voltages for flexible insulation testing
Wide 0.01MΩ to 2000MΩ insulation resistance range
Earth bond >200mA short circuit current
Auto-discharge <0.5 seconds for post-test safety
Live circuit inhibit protection above 30V
CAT IV 600V — CSA and TÜV certified
1000+ insulation tests per battery set
Trusted Fluke professional instrument quality
Warranty period
1 Year Warranty
Coverage
Free from defects in material and workmanship for 1 year from the date of purchase, including accessories supplied with the product, such as test leads and probes.
Not covered
Fuses, disposable batteries and manuals; damage from accident, neglect, misuse, alteration, contamination, or abnormal conditions of operation or handling. For Fluke Networks products, parts and accessories (including rechargeable batteries and cables) are covered for 90 days.
Warranty void if
The product has been used outside its specifications, altered, or repaired by a party not authorised by Fluke.
Contact Techno Tools with your proof of purchase. The warranty applies to the original purchaser only.
Order by 4PM to get delivered next working day! We use 24 hours service with carriers in most cases so that you can get your order delivered on time.
Free delivery for total orders above RM500, otherwise additional charges costs are calculated at checkout based on your order’s weight and delivery location.
Please notify us within 14 calendar days of receiving your product to request a free exchange or full refund, if eligible. We will cover all return shipping costs, and no restocking fees will apply in this case.
Requests made after 14 days may be accepted at our discretion and will be subject to a 10% restocking fee. Techno Tools & Equipment reserves the right to reject any return request found to be ineligible.
