SIM970 Quad Digital Voltmeter0 pages

Small Instrumentation Modules
SIM970 — 5½-digit quad digital voltmeter

· True 5½-digit performance
· Four isolated channels
· 3 decade autoranging to ±19.9999 V
· 10 MΩ input impedance
· Trigger input for data synchronization
· Unique continuous auto-calibration
· 90 dB power line frequency rejection

· SIM970 ... $1495 (U.S. list)

SIM970 Quad Digital Voltmeter
The SIM970 Quad Digital Voltmeter is designed to make
precision DC voltage measurements with excellent longterm accuracy.
For applications in which many voltages must be monitored,
up to 16 DVM channels can be put into one SIM900
mainframe. Four voltage ranges from ±199.999 mV to
±19.9999 V can be autoranged or manually selected. An
external trigger input allows synchronization of voltage
readings on all four channels for critical applications requiring
coincidental readings. A BUSY output gives a TTL (logic
high) signal when readings are being taken.

The bright front-panel LED display shows updated readings
three times per second. Computer access through the SIM900
mainframe (RS-232 or GPIB) permits data logging with
24 bits of resolution. All channels are isolated from ground
and each other. The SIM970 uses isolated BNC connectors for
inputs so coaxial cables can be used for reduced noise pickup.

Auto-calibration is performed with every reading by
sequentially measuring not only the input voltage, but also the
ground and the full-scale voltages against a calibrated internal
reference. This auto-calibration routine virtually eliminates
offsets and scale errors, and ensures smooth range-torange transitions.

Stanford Research Systems

phone: (408)744-9040
www.thinkSRS.com