The Model 1250N is a compact, self-contained, hand-cranked True Megohmmeter. This practical and dependable instrument is designed for a broad range of plant and field service applications. The easy hand-cranked operation provides a steady, rectified DC voltage output across the entire range for consistently reliable readings. The Model 1250N has three test voltages for insulation resistance testing: 250, 500 and 1000V, and has a test voltage range for safety checks to confirm the sample is fully discharged and not connected to an energized circuit. Test voltages are generated in full across the entire measurement range.

Features:
• Three constant test voltages: 250, 500, 1000V
• Constant test voltage across measurement range ensures accurate and realistic tests - True Megohmmeter
• Autoranging MW ranges
• Designed for harsh environments: offshore, mining, heavy-duty field, industrial, and military use
• Extra rugged cast aluminum case; O-ring sealed against rain, water and dust; aluminum lid
• Compact, self-contained package; folding crank
• Four terminals including guard and ground
• Large direct-reading scale
• 600V test voltage range (safety check)

Insulation Tests
Test Voltage 250V 500V 1000V	1 to 11MΩ: 11 to 500MΩ 1 to 11MΩ: 11 to 500MΩ 10 to 110MΩ: 110 to 5000MΩ
Short Circuit Current	5mA (max)
Voltage Test / Safty Check	0 to 600VAC
Accuracy	2% of Full Scale Length