MERC-ITC-1 MercuryiTC温度控制器配置一个PID回路

MercuryiTC是一款多功能低温环境控制器。它的基本形式包括一个单通道高分辨率(24位)温度测量电路，支持所有标准的低温传感器(氧化钌，Cernox，硅二极管，铂，热电偶和RhFe)。通过恒压模式，它可以使用负温度传感器(NTC)实现可靠、准确的温度测量，温度测量低于250 mK。基础单元支持单加热器输出的PID回路配置控制，最高可达80W (40v, 2a)。基础单元集成了一个多功能触摸屏显示信号部件(18个部件)，用户可配置显示任何内部系统信号。通过TCP/IP, USB, RS232或可选的GPIB远程命令完全可控。任何可用的系统信号也可通过远程命令获得。基本单元可通过即插即用卡进行扩展。9个扩展插槽，8个多用途插槽，1个GPIB专用插槽。扩展槽允许增加8个额外的温度传感器卡，或3个温度传感器卡加上3个额外的80W加热器卡，共形成4个独立的PID循环。或者可以添加压力传感器卡，可用于通过辅助(气体控制)卡控制低温流量。请注意:温度传感器-加热器PID循环算法还包括一个功能，以平衡冷却低温流量，而不需要一个压力卡。 The MercuryiTC will also support the Cryogen level meter card for monitoring Helium and Nitrogen cryogen levels Thermometry • Number of inputs: 1 included as standard, up to 8 extra • A/D Resolution: 24-bit • Maximum reading rate: Up to 4 readings per sec. • Isolation: All sensors independently isolated • Supported sensor types: All standard types of cryogenic RTD’s plus diodes and thermocouples Heater • Number of outputs: 1 incl. as standard, up to 3 extra • DAC Resolution: 16-bit • Max heater power: 80 W • Max current: 2 A • Max voltage: 40 V • Heater load range: 20 Ohms to 120 Ohms • Heater noise (0 - 2 MHz): 2 mV Configuration options • Sensor input: Up to 9 • Heater output: Up to 4 • N2 / He level meter: Up to 2 • Auxiliary control (stepper motor): Up to 4 • GPIB: 1 Control • Number of loops: 1 incl. as standard, up to 3 extra • PID control: Fixed or zonal • Set point: Programmable • Proportional gain: 0 to 200 K (resolution 0.1) • Integral time: 0 to 200 mins (resolution 0.001) • Derivative rate: 0 to 300 mins (resolution 0.001) Pressure Reading • Number of inputs: Up to 4 • A/D Resolution: 24-bit • Maximum reading rate: Up to 4 readings per sec. • Absolute accuracy: ±0.1% full scale in each range • Voltage Ranges: 10V, 1.6V, 0.8V, 0.4V, 0.2V, 0-0.1V (Auto-ranging) • Current Ranges: 4-20mA (20mA, 16mA, 8mA, 4mA Auto-ranging) • Sensor Excitation Voltage: 0 V(off) , 10V±5% or 15V±5% • Sensor Excitation Current: 0 - 20 mA • Supported sensor types: Voltage, Current and Ratiometric Cryogen Level Reading • Number of cards: Up to 2 • Each card supports a Helium Level input and a Nitrogen Level input • Helium Level specifications ◦Excitation current settings: 20 mA to 280 mA in 20 mA steps ◦Excitation current accuracy: ±5% ◦Excitation voltage: 40 V maximum ◦Probe resistance: 0 to 300 ohms ◦Probe resistance accuracy: ±0.2% ◦Probe resistance stability: ±0.1% ◦A/D Resolution: 24-bit ◦Reading rate: 1 sample every 10s or 1 sample every 30 minutes. ◦Isolation: All sensors independently isolated •Nitrogen Level input ◦Probe source voltage: 12 VDC ◦Probe source oscillator frequency range: 5 kHz to 90 kHz ◦Probe sensing resolution (level): 0.1% ◦Probe sensing accuracy (level): 0.5%