Hp/agilent 8477a Calibrator And Hp 432a Power Meter With Cord, (keysight)

US $1000

  • Rigby, Idaho, United States
  • Jun 24th
This listing includes: Hewlett Packard 8477A Calibrator and an HP 432A Power Meter (also the Test Cable for connecting the Meters and a power cord for the HP 432A) Descriptions and test results follow. HP 8477A Calibrator - Serial #: 1922A02294 Good over all condition.  Some scrapes and scratches and some of the lettering and lines on the front are faded/worn (see photos).  This unit powers up.  See test description below. HP 432A Power Meter -  Serial #: 904-01220 This appears to be a very early model (note the blue color).  The power cord is a non-standard  oval shape and is included.  I couldn't resist including photos of the circuit boards.  They are beautiful with gold tracing and the HP logo and board number are also gold plated.  The circuit board numbers are: 00432-6015 & 00432-6001.  (Note 00432-6002 is printed on the chassis, but the  board says 00432-60105 so the board may have been upgraded).   Testing - The instruments were connected per the manual and I ran through the Meter Accuracy Test, Calibration Factor Test, and Meter Linearity Check.  On initial turn on with the calibrator Zero/Test switch in the Zero position, the needle on the power meter continued to slowly rise after initial zeroing.  After 15 to 20 minutes the needle stabilized and I was able to zero per spec (+/- 2 mV). The calibrator Zero/Test switch was then moved to the Test position.  With both meters set to 200 Ohm and 0.1mW, the power meter read .99 (full scale) and the attached DVM read 993 mV.  Each of the other settings were then tested.  Upon switching scales on the Calibrator, the Power Meter needle moved erratically.  With slight movement of the calibrator power knob, the erratic movement  of the power meter needle would settle down. This seemed to occur each time a different power was set.  In each case the needle would eventually settle down.  After settling, all of the readings in the Meter Accuracy Test, Calibration Factor Test and Meter Linearity Check were within spec.  I don't  know if the initial erratic behavior is normal settling or something else.

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