Fluke – Insulation Resistance Testers (Model 1555)

 Features include:

• Test voltages to up 10 kV and save time by trending on the spot only with Fluke Connect™
• CAT III 1000 V, CAT IV 600 V safety rating
• Warning function alerts the user that line voltage is present and gives the voltage reading up to 600 V AC or DC for increased user safety
• Selectable test voltages in 50 V steps from 250 V to 1000 V, and 100 V steps above 1000 V
• Measurements can be stored in up to 99 memory locations, with each location assigned a unique, user defined, label for easy recall
• Long battery life gives the user over 750 tests between charges
• Automatic calculation of Dielectric Absorption (DAR) and Polarization Index (PI) with no additional setup
• Guard system eliminates the effect of surface leakage current on high-resistance measurements
• Large digital/analog LCD for easy viewing
• Capacitance and leakage current measurement
• Ramp function for breakdown testing
• Resistance measurements up to 2 TΩ
• Timer settings up to 99 minutes for timed tests
• 3-year warranty

Electrical Specifications The tester's accuracy is specified for one year after calibration at operating temperatures of 0 °C to 35 °C. For operating temperatures outside the range (-20 °C to 0 °C and 35 °C to 50 °C), add ± .25 % per °C, except on the 20 % bands add ± 1 % per °C. Insulation Resistance Measurement Test voltage (DC) Range Accuracy (± reading) 250 V < 200 kΩ Unspecified 200 kΩ to 5 GΩ 5 % 5 GΩ to 50 GΩ 20 % > 50 GΩ Unspecified 500 V < 500 kΩ Unspecified 500 kΩ to 10 GΩ 5 % 10 GΩ to 100 GΩ 20 % > 100 GΩ Unspecified 1000 V < 200 kΩ Unspecified 200 kΩ to 20 GΩ 5 % 20 GΩ to 200 GΩ 20 % > 200 GΩ Unspecified 2500 V < 200 kΩ Unspecified 200 kΩ to 50 GΩ 5 % 50 GΩ to 500 GΩ 20 % > 500 GΩ Unspecified 5000 V < 200 kΩ Unspecified 200 kΩ to 100 GΩ 5 % 100 GΩ to 1 TΩ 20 % > 1 TΩ Unspecified 10000 V (1555 Only) < 200 kΩ Unspecified 200 kΩ to 200 GΩ 5 % 200 GΩ to 2 TΩ 20 % > 2 TΩ Unspecified Bar graph range 0 to 1 TΩ (1550C) – 0 to 2 TΩ (1555) Insulation test voltage accuracy -0 %, +10 % at 1 mA load current Induced ac mains current rejection 2 mA maximum Charging rate for capacitive load 5 seconds per μF Discharge rate for capacitive load 1.5 s/μF Leakage current measurement Range: 1 nA to 2 mA Accuracy: ± (5 % + 2 nA) Capacitance measurement Range: 0.01 μF to 15.00 μF Accuracy: ± (15 % rdg + 0.03 μF) Timer Range: 0 to 99 minutes Resolution: Setting: 1 minute, Indication: 1 second Live circuit warning Warning range: 30 V to 660 V ac/dc, 50/60 Hz Voltage accuracy: ± (15 % + 2 V) Software specifications FlukeView Forms™ basic software requires a PC running Windows XP, Windows Vista , Windows 7 or Windows 8 General Specifications Display 75 mm x 105 mm Power 12 V lead-acid rechargeable battery, Yuasa NP2.8-12 Charger Input (AC) 85 V to 250 V ac 50/60 Hz 20 VA This Class II (double insulated) instrument is supplied with a Class 1 (grounded) power cord. The protective earth terminal (ground pin) is not connected internally. The extra pin is for added plug retention only. Dimensions 269 mm x 277 mm x 160 mm (10.6 in x 10.9 in x 6.3 in) Weight 3.7 kg (8.2 lb) Temperature (operating) -20 ºC to 50 ºC (-4 ºF to 122 ºF) Temperature (storage) -20 ºC to 65 ºC (-4 ºF to 149 ºF) Humidity 80 % to 31 ºC decreasing linearly to 50 % at 50 ºC Altitude 2000 m Enclosure sealing IP40 Input overload protection 1000 V AC Electromagnetic compatibility EN 61326 Certifications Safety compliance IEC 61010-1: Overvoltage category II, pollution degree 2 IEC 61010-2-030: Measurement 600V CAT IIV / 1000V CAT III IEC 61557-1, IEC 61557-2 Fluke Connect™ compatible Yes