The Megohmmeter Model 6505 is a True Megohmmeter^® portable instrument housed in a rugged field case that operates on either battery or line power. It performs voltage, insulation, and capacitance measurements. This instrument contributes to the safety of electrical installations and equipment.

Features include automatic calculation and presentation of the Dielectric Absorption Ratio (DAR) and Polarization Index (PI). The Model 6505 displays the test voltage, insulation resistance and the leakage current during the test. Capacitance of the sample and discharge voltage present at the test leads is displayed at the conclusion of the test.

The Model 6505 is designed with a high level of built-in safety features. This meter incorporates test inhibit capabilities which will not allow test voltages to be generated if a live sample is detected. The test terminals are recessed to ensure operating safety.

Specifications:

AC/DC Voltage Measurement
Range(	(1 to 4000) V
Accuracy	(1 to 99.9) V: ±(1 % R + 5 ct) (100 to 4000) V: ±(1 % R + 3 ct)
Resolution	(1 to 99.9) V: 0.1 V (100 to 999) V: 1 V (1000 to 4000) V: 2 V
Frequency Range(	(1 to 2500) V: DC or (15 to 500) Hz (2501 to 4000) V: DC
Input Impedance	750 kΩ or 3 MΩ (range dependent)
Insulation Measurement
Test Voltage / Resistance Range	500 V: 10 kΩ to 2 TΩ 1000 V: 10 kΩ to 4 TΩ 2500 V: 10 kΩ to 10 TΩ 5000 V: 10 kΩ to 10 TΩ
Measurement Accuracy	10 kΩ to 399.9 GΩ: ±(5 % R + 3 ct) 400 GΩ 10 TΩ: ±(15 % R + 10 ct)
Variable Voltage	(40 to 5,100) V
Auto Discharge	Discharge time < 7 s/µF from Vtest to 25 V @ 5000 V
Live Circuit Indicator	Test inhibition if terminal voltage > 40 % of test voltage
General Features
Programmable Alarm	Yes
DAR – PI	Yes
Ramp Mode	No
Step Mode	No
Capacitance Measurement	(0.005 to 49.99) µf
Open Circuit Voltage	≤ 1.1 x Vn ±2 V (Vn ±2 % in variable mode)
Power Supply	Rechargeable NIMH battery pack; external 85-256 V, (50/60) Hz
Battery Life	≥ 1500  tests at 5000 V into 5 MΩ with a duty cycle of 5 seconds on and 25 seconds off
Charging Time	6 hours approximately (charging allowed during tests)
Dimensions	(10.63 x 9.84 x 7.09) in (270 x 250 x 180) mm
Weight	9.5 lbs (4.3 kg)
Altitude Operating	6562 ft (2000 m)
Operating Temperature	(14 to +131) °F (-10 to +55) °C ≤80 % RH
Storage Temperature	(-40 to +158) °F (-40 to +70) °C ≤90 % RH
IP Rating	IP 53
Safety Compliance	EN 61010-1, EN 61557, 1000 V CAT III, Pollution Degree 2

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