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California Instruments 1251P AC Voltage Source 0-270VAC Mostly Working - Parts

Current Stock:

Product Description

Manufacturer: California Instruments

Model: 1251P

Condition: For Parts or Not Working. This source is in Fair cosmetic condition with lots of scuffs/stains from prior use, and light scratches here and there all over.
The photos show the exact item(s) the buyer will receive.

Notes: This source is in at-least-partial working condition.  We found it is able to give full rated voltage even at low input voltage (275 out from 120 in).  The high and low voltage outputs give variable frequency and voltage, but the waveforms are very noisy at low voltage - about a volt and a half of noise rides on a sine wave. At high voltages this blends in, but at low voltage outputs the noise dominates the signal on our oscilloscope. At low voltage (under a couple of volts), the voltage noise is so prominent that it throws off the frequency reading on our multimeter, causing frequency readings to jump all over the place!   We also found the current meter gives a reading that doesn't match either our kill-a-watt meter or our amp clamp style current meters; we are not sure why.  The knob adjusts, but sometimes it will make a bigger "jump" in adjustment than we wanted, even with slow, smooth turning of the dial.  Further, the voltage output is slightly off, up to about a volt and a half higher than displayed on the meter (about a percent).  The started running faster when we set higher frequencies, even at no load.  We don't trust the current meter on this unit, and the output is noisy so we are offering it for sale AS-IS. 
No manuals, cords/cables, or additional items are included if not listed or shown.


  • (1) CI 1251P AC Voltage Source


  • Manufacturer: California Instruments
  • Model: 1251P
  • AC Voltage Source
  • P/N: 5002-419-1
  • Output power rating: 1250 VA
  • Variable output frequency: 16 to 500 Hz
  • Variable output voltage: 0.1 to 270 V (l-n)
  • Current: 4.6A steady-state high range, 9.2ARMS steady state low range
  • Current peak: 13.8 and 27.6A
  • Input: 100 to 240 V, 50 to 60 Hz, 1725 VA, IEC-320-C20 plug
  • LCD displays for voltage and frequency/current output
  • (2) NEMA 5-15R output for low voltage range
  • Type F output for high voltage range
  • Output on/off switch
  • Power factor: >0.95 typical
  • Programmable controller
  • RS-232 remote control

Current readings seem off, voltage output is noisy but controlled please read!


  • No returns - No refunds - No exchanges
  • By purchasing this item, you are agreeing to not seek reimbursement should the item not function to the manufacturer's specifications.
  • Read the notes carefully to ensure you are buying something you can use
  • See complete terms

CDN Systems LLC, DBA Doug Deals, is not an authorized distributor or affiliated with the manufacturer of this product. Original manufacturer's warranty does not apply.

Other Details

For Parts or Not Working

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