BACKGROUND:
This component is Ex KEITHLEY precision test equipment (642 Electrometer which measured charge, voltage and current down to extremely low levels)
The manufacturer of the potentiometer is Vernitron Corp. which was based in Long Island USA and it appears that they changed ownership in the mid 1980's, becoming Axsys Technologies with their product focus being Aerospace & Defence industries.
It appears this multi-turn potentiometer was manufactured in Haiti (printed on the side)
VERNITRON CORP. (USA) - Rotary Potentiometer
Type: Multi-turn
Value: 1K
5% tolerance
Linearity: +/- 0.25%
Identification markings (printed) on the body:
(Schematic of the pot indicating which terminal is connected to the track and wiper)
VRN HAITI
7000-1
1K +/- 5%
LIN +/- .25%
8215
Taper: Linear
10 turn with stops each end
Panel mounting (supplied with nut & lock washer)
Round 1/4" shaft (not a D shape with flat spot) with a slot at the end of the shaft. Fine for use with a grub screw or collet fixing knob or just leave it "as is" for through hole screw driver adjustment.
DIMENSIONS:
Body: 22.5mm diameter x 18.5mm height
Panel mounting hole required: minimum 9.5mm
Shaft length: 12.25mm
Side mounted solder tag terminations
COSMETIC CONDITION:
USED
Clean and undamaged physically
Solder tags have been cleaned and "dags" removed
TESTING:
Being a USED potentiometer,
Measured track resistance: 1.016K Ohm (well within tolerances)
NO issues with linearity that I could observe and no dead spots detected - nice smooth variation across the track.
To maintain the condition of this potentiometer, it has now been sealed in a clear plastic packet
