The Stanford Research Systems PPM100 is a stand-alone partial pressure monitor and controller designed for integration with Residual Gas Analyzers (RGAs) and capacitance manometers. It measures partial pressures from SRS RGAs and total pressure from up to four capacitance manometers with full-scale ranges to 1000 Torr. The instrument combines a 4.7-inch touchscreen LCD display with graphical output capability—numeric, bar graph, and Pressure vs. Time modes—enabling direct RGA parameter programming from the front panel without a host PC.
– Technical Specifications
Display & Readout
• Touchscreen LCD: 4.7″ diagonal, 320 × 230 pixel resolution
• Numeric resolution: 3-digit mantissa plus exponent
• Pressure units: Torr, mbar, bar, Pa, micron
• Update rate: 2 samples per second
Pressure Measurement
• Partial pressure from SRS RGAs
• Total pressure from up to 4 capacitance manometers
• CM full-scale ranges: up to 1000 Torr
• Linear signal acquisition: 0 to 10 VDC from capacitance manometers
Process Control
• 8-channel configurable control with setpoint, polarity, hysteresis, delay, and audible alarm programming
• Input signals: total pressure (CM), partial pressure (RGA), analog voltage, time-stamp, TTL, gauge status
• Output signals: SPDT relay (5 A/250 VAC, 30 VDC resistive), TTL opto-isolated (active low)
• Seven dedicated TTL inputs for device triggering (filament on/off, degas)
• Time-stamped event logging in memory
Analog I/O
• Four configurable analog ports (±12 VDC)
• Input resolution: 14-bit
• Output resolution: 12-bit
• Update rate: 2 Hz
• Connector: BNC
• Auxiliary power output: ±15 VDC @ 100 mA
Communications & Interfaces
• RS-232, USB, GPIB, Ethernet with password-protected embedded web server
– Key Features
• Data logging at user-defined rate from all gauges and analog inputs
• User-programmable audible alarms and text messages
• Time-stamped process control event recording
– Typical Applications
• Pump-down and venting curve acquisition
• Mass flow controller signal monitoring
• Temperature variable tracking
• Multi-gauge vacuum system supervision
– Compatibility & Integration
The PPM100 interfaces with SRS RGA systems and standard capacitance manometers. Analog I/O ports accommodate auxiliary vacuum equipment including heaters, actuators, ion sources, PLCs, throttle controllers, and dosing valves.
