MKS 307702-A1B-T1 Vacuum Gauge Controller GP
This is a Granville-Phillips type 307 vacuum controller package, including a NEW nude ionization gauge tube, two NEW Convectron gauge tubes, and associated gauge tube cables.The controller and power supply are used. Cosmetic condition is not pristine, but is quite good. There are some scuffs and scratches on the cabinets from handling, and a few very light scuffs on the face of the controller display - nothing that deleteriously affects the readability of the display.The ionization gauge cable and Convectron gauge cables were not received by us in sealed packaging, but they both appear to be in new condition.The controller was tested (using a different gauge tube) on a high vacuum system. It appeared to function just fine, and pressure readings nicely matched those obtained from a "known good" ionization gauge controller used to operate the same gauge tube on the same system. The degas functioned properly as well. The Convectron channels were checked using a G-P variable pressure Convectron gauge tube simulator; both channels responded as expected.Controller ionization gauge capabilities:
- with the included power supply, supports operation of a single Bayard-Alpert type ionization gauge tube
- resistive (I2R) degas compatible with standard nude or glass envelope gauges (bifilar grid)
- lower measurement limit of 1 x 10-10Torr
- emission current adjustable from 0.01 to 10.0 mA
- gauge sensitivity adjustable from 3 Torr-1to 50 Torr-1
- analog output; logarithmic, 1 V per decade, 0-10 VDC
