In its base configuration, Model 204B is a high-accuracy ±3,999-count DC voltmeter which fills the gap between 3 1/2 and 4 1/2 digit resolution. The most sensitive standard input range is ±39.99 mV full-scale and provides 10 µV resolution. Extended-range options are available to ±4,999 and ±5,999 counts. Accuracy is 99.95% of reading.

Unbuffered, non-isolated parallel BCD output is a standard feature of the 204B and is implemented on the main circuit board. It is good for about 1 feet and can be used to interface the 204B to a comparator (Model 872A) or a printer (Model 820A). Additional data and control outputs can be provided by an optional upper board.

• Parallel BCD output
• ±3,999-count display span
• ±40 mV to ±400 V dc ranges
• 3-wire ratio input
• 1500 Vp CMV, 120 dB CMR
• Bright, 0.56 in (14.2 mm) LED display
• Automatic zero and polarity
• 115/230 V ac power
• 1/8 DIN case