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AEMC®Instruments

Model 1250N [Catalog No. 1326.02]
Insulation Tester (Hand-cranked)		  
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Model 1250N [Catalog No. 1326.02] Insulation Tester (Hand-cranked)
 
  Characteristics:  
 
 
  • Three constant test voltages: 250, 500, 1000V
  • Constant test voltage across measurement range ensures accurate and realistic tests - True Megohmmeter®
  • Auto-ranging MΩ 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)
  
 
  Application:  
 
 
  • Acceptance testing and preventive maintenance
  • Motors, cables, switchgears and electrical wiring installations
  • Continuity checks
  • Domestic and industrial contracting
  
 
  Product Description:  
 
space 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.

  
 
  Specifications:  
 
 
ELECTRICAL Model 1250N
INSULATION TESTS  
Test Voltage

250V
500V
1000V

 11 to 11MΩ; 111 to 500MΩ
11 to 11MΩ; 111 to 500MΩ
10 to 110MΩ; 110 to 5000MΩ
   
Short Circuit Current 5mA (max)
Accuracy 2% of Full Scale Length
Automatic Discharge 8s/μF
Charging Time

250V
500V
1000V

 0.2s/μF
0.5s/μF
0.5s/μF
RESISTANCE TESTS  
Measurement Range autoranging
Test Current 1mA constant current
Accuracy 2.5% of Full Scale
CONTINUITY TESTS
Test Voltage 5mA constant, 10V max

Measurement Range
(auto ranging)

0 to 9Ω;
9 to 100Ω
Accuracy 2% of Full Scale
Fuse Protection 0.2A, 250V, fast-blow, 5 x 20mm
VOLTAGE TESTS
Voltage Range 0 to 600VAC
Frequency 45 to 450Hz
Accuracy 3% of Full Scale
Input Impedance 100kΩ (approx)
GENERAL
Power Source Hand-cranked, heavy duty brushless alternator and solid state rectification and amplification for stable voltage; test voltage reached at 140rpm (approx)
Scale Direct reading on all ranges; 3" (76mm), black on white
Test Voltage indicator Amber LED indicates proper test voltage and crank speed
Auto-Range Indicator Red LED indicates Auto-Range; multiply MΩ, kΩ and Ω readings x 10
Dielectric Test 2000V, 50/60Hz, between (–), (+) & ground terminals
Meter Movement Rugged taut band suspension
Dimensions 4.7 x 4.7 x 5.1" (120 x 120 x 130mm)
Weight 3.3 lbs (1.5kg)
Case

Cast aluminum alloy case and lid painted safety-yellow, with heavy duty gray polycarbonate front panel;

O-ring sealed against water and dust; folding crank

Terminals

Guard “+” Line (red);
“-” earth (black); and ground;
accept standard 4mm banana plugs
SAFETY
Safety Rating EN 61010-1, 600V, Cat. II; 1000V, Cat. I
Double Insulation Yes
CE Mark Yes
 
 
  Downloads:  
 
  pdf_pic Downloads: Specifications  
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All descriptions and specifications are subject to change without notice
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