The Stanford Research Systems SR630 is a 16-channel thermocouple reader and voltmeter designed for precision temperature and voltage measurements across laboratory and industrial environments. It acquires data from seven thermocouple types (B, E, J, K, R, S, T) over a -200 °C to +1700 °C range, storing up to 2000 timestamped readings in non-volatile memory with programmable logging intervals from 10 to 9999 seconds. The instrument delivers 0.1 °C resolution with accuracies of 0.5 °C for J, K, E, and T thermocouples and 1.0 °C for R, S, and B types, backed by rear-panel isothermal block cold junction compensation and open-circuit detection with alarm triggering.
Technical Specifications
Thermocouple Measurement
• 16 independent channels with types B, E, J, K, R, S, T support
• Temperature range: -200 °C to +1700 °C
• Resolution: 0.1 °C; display units in °C, °F, K, mV, V
• Accuracy: 0.5 °C (J, K, E, T); 1.0 °C (R, S, B)
• Cold junction compensation via isothermal block; open-circuit detection with alarm
• Programmable per-channel temperature limit alarms with audio and relay closure output
Voltage Measurement
• Full-scale ranges: 30 mV to 100 V
• Resolution: 1 mV; accuracy: 0.05%
• Input offset drift: 1 µV
Data Logging & Control
• 2000 timestamped readings in non-volatile memory
• Logging intervals: 10 to 9999 seconds (programmable)
• Nine storable instrument configurations
• Battery-backed clock/calendar for time-stamping
Measurement & Conversion
• Dual slope integrating converter synchronized to 50/60 Hz line frequency
• Conversion rate: 10/12 conversions per second
• Isolated differential inputs; 10 MΩ input resistance; 250 V breakdown protection
Electrical
• Input: 100/120/220/240 Vac, 50/60 Hz (selectable)
• Fusing: 1/2 A (100/120 V); 1/4 A (220/240 V)
– Key Features
• Four analog outputs proportional to channels 1–4 with configurable slope (m) and offset (b)
• Analog multiplexer function: routes any of channels 1–15 to channel 16 for external instrument integration
• Alarm relay output for temperature excursion monitoring
• Programmable nominal temperature/voltage settings per channel
– Interfaces & Integration
• GPIB (IEEE-488.1, 488.2) and RS-232 communication
• Centronics parallel printer port with tabular or strip-chart output formats
• Four configurable analog outputs for chart recorders and proportional control feedback
