求翻译：Note: The Varian 801 thermocouple gauge control is a compact, self-contained instrument designed primarily for panel mounting. It is supplied with a 6-foot line cord and a 10-foot thermocouple gauge cable. The instrument is line voltage-regulated, and a temperature-sensitive element to compensate for temperature drift in thermocouple gauges is built into the thermocouple gauge socket. The indicator dial, which covers the pressure range from 1 to 200 milliTorr (1 milliTorr is 1/1000 of 1 mm of mercury, or 1/1000 of 1 Torr), is calibrated for a Varian 531 thermocouple gauge in dry air. The mechanical zero adjustment is located on the front of the instrument. The pressure calibration can be reached through a hole in the rear cover (figures 1b and 1d). The meter voltage (0 to 11 mv) is available at two solder terminals at the rear for operating remote indicators whose input resistance should be 200 ohms or more.是什么意思？

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