Product Overview
Ion Gauge and Dual Thermocouple Vacuum Readout with Ion and TC Set Points
Condition
Used, in good condition on visual inspection, and powered on to confirm it comes up; no further function testing was done. Gauge tubes, gauge cables and a power cord are not included. Markings legible: MODEL 843, SERIAL 40F275, VOLTS 115/230, FREQ 50/60, WATTS 100, varian lexington vacuum division, lexington massachusetts. Light scratches mark the top cover.
Ships same or next business day from our Idaho warehouse. Selling online since 1999.
We are here for our customers, with a no-hassle satisfaction guarantee.
Product Overview
A Ratiomatic controller from Varian's Lexington vacuum division that reads one ion gauge tube and two thermocouple gauge tubes on a single front panel.
Key Features
- Main meter scaled in TORR, with a RANGE selector that includes a LOG position
- Two thermocouple meters, TC 1 and TC 2, scaled in MILLITORR
- Five front push buttons: EM, OFF, ON, DEGAS and PWR
- Rear ION SET PT 1, ION SET PT 2 and TC SET PT dials
- Rear ION GAUGE TUBE, TC 1, TC 2 and ACCESSORY connectors
- Rear 2A S/B fuse holder, LINE inlet and 115/230 selector
- Rated 115/230 volts, 50/60 Hz, 100 watts
Applications
- Replacing a failed 843 on an existing vacuum system with Varian 531 thermocouple gauge tubes
- Keeping a spare readout for a Varian ion gauge setup
Frequently Asked Questions
Which thermocouple gauge tubes does it read?
Varian 531 thermocouple gauge tubes, one on each of the TC 1 and TC 2 inputs. Neither tubes nor cables are included.
What ion gauge tube does it run?
A glass ion gauge tube, on the rear ION GAUGE TUBE connector. No tube or cable is included.
Will it run on 230 V?
Yes. It is rated VOLTS 115/230 and FREQ 50/60, with a rear 115/230 selector beside the LINE inlet, now at 115.
Has it been tested beyond power-on?
No. It was powered on to confirm it comes up, and no further function testing was done. You get the controller with its meters, push buttons and set point dials; checking its readings against a known gauge is on you. Flat-rate shipping in the lower 48, and orders over the free-shipping line ship free.
Five push buttons, three meters and a nameplate from Lexington, Massachusetts. It powers on, and what it reads on your chamber is the part still to find out.
