Characterisation, Measurement & Analysis
+44(0)1582 764334

More Views

SRS SIM922A Diode Monitor

Be the first to review this product

Product Code: 15023
Manufacturer: Stanford Research Systems

  • Single-channel LED display

  • 1.4 K to 475 K with Si,

  • GaAs or GaAlAs diodes

  • 1.4 K to 873 K with RTDs

  • Two analog outputs:

    • Linearized V proportional to T

    • Sensor voltage (buffered)

The Stanford Research Systems SIM922A Diode Monitor continuously read a single sensor and provide both digital and analog outputs. Based on the modular SIM platform, they provide high performance capability in a small footprint.

The SRS SIM922A has a programmable, precision 10 µA current source to provide sensor excitation. Results can be displayed in either kelvins or volts.

The SIM922A employs four-wire measurement circuits (±I excitation leads, ±V sense leads), making readings insensitive to series lead resistance. Sensor excitations can be disabled to reduce power dissipation at sensitive cryogenic stages. Measurements are performed at five readings per second.

The scaled analog output (±10 V) produces a voltage proportional to measured temperature, with a full-scale range from 10 K to 1000 K. A relative-mode button subtracts the last absolute reading prior to scaling, to provide expanded resolution for temperature deviations. The second (monitor) output is the buffered, low-noise raw sensor voltage without any additional processing.

Either analog output may be coupled to the SIM960 Analog PID Controller for high-performance, closed-loop temperature control.

A factory-standard calibration curve is pre-programmed for each model. Non-volatile memory also permits storage of a 256-point custom calibration curve to convert sensor units (V or Ω) to temperature units (K).

Results are displayed on an easy-to-read, 4-digit LED display. Full remote operation is available over the serial interface.

Additional Information

SIM922A SIM923A
Number of inputs 1 1
Sensor type Si, GaAs, or GaAlAs diodes Platinum and other RTDs
Measurement type 4-wire 4-wire
Excitation (constant current) 10 µA ± 0.01 %, ±5 ppm/°C 1.0 mA ± 0.1 %, ±5 ppm/°C
10 µA ± 0.1 %, ±5 ppm/°C
Sensor units Volts Ohms
Input range 0 V to 7.5 V 0 Ω to 1400 Ω (1 mA excitation)
0 Ω to 140 kΩ (10 µA excitation)
(includes excitation lead resistance)
Calibration curves 1 standard plus 1 user curve, 256 points DIN 43760 plus 1 user curve, 256 points
Temperature range (sensor dependent) 1.4 K to 475 K (typical) 1.4 K to 873 K (typical)
Display resolution 4 digits 4 digits
Interface resolution 1 µV 1 mΩ / 100 mΩ (1 mA / 10 µA)
Measurement resolution (rms 4 µV 1.2 mΩ / 120 mΩ (1 mA / 10 µA)
Accuracy, (23 ± 1) °C 20 µV + 0.01 % 5 mΩ / 0.5 Ω + 0.01 % (1 mA / 10 µA)
Temperature coefficient ±5 ppm/°C ±5 ppm/°C
Common Specifications
Measurement rate 5 readings per second
Scaled analog output ±10 VDC full-scale range
     Full scale 10 K, 100 K or 1000 K
     Resolution 300 µV
     Accuracy 1 mV
Monitor analog output
     Offset
     Bandwidth 4 kHz
Operating temperature 0 °C to 40 °C, non-condensing
Interface Serial via SIM interface
Connectors
     Sensor Two DB9 (female)
     SIM DB15 (male) SIM interface
     Analog outputs Two BNC (front panel)
Power (max.) Power supplied by the SIM900 Mainframe, or optionally by a user-supplied DC power supply (±15 V and +5 V)
Dimensions 1.5" × 3.6" × 7.0" (WHL)
Weight 1.4 lbs.
Warranty One year parts and labor on defects in materials and workmanship

Customer Reviews

Write Your Own Review

How do you rate this product? *

  1 star 2 stars 3 stars 4 stars 5 stars
Rating
Photo Product
SRS SIM921 AC Resistance Bridge SRS SIM921 AC Resistance Bridge
SRS SIM922 Diode Temperature Monitors SRS SIM922 Diode Temperature Monitors
SRS SIM923 Platinum RTD Temperature Monitors SRS SIM923 Platinum RTD Temperature Monitors
SRS SIM923A Platinum RTD Temperature Monitors SRS SIM923A Platinum RTD Temperature Monitors
SRS SR630 16 Channel Thermocouple Monitor SRS SR630 16 Channel Thermocouple Monitor
Pico TC-08 Thermocouple Data Logger Pico TC-08 Thermocouple Data Logger
Pico Technology PR121 USB TC-08 single channel terminal board Pico Technology PR121 USB TC-08 single channel terminal board
SRS SIM983 1 MHz Scaling Amplifier SRS SIM983 1 MHz Scaling Amplifier