Cryogen level metering card for Mercury instruments ITC and IPS units. Customisation is possible through the addition of plug and play expansion cards. The controller features 9 expansion slots (8 multi-function slots and a dedicated GPIB slot) which can be used to extend its capability.
Cryogen level metering card for MercuryiTC and MercuryiPS master units:
• Plug and go card for Oxford Instruments Mercury Instrumentation
• Supports duel cryogen level metering of Nitrogen and Helium
• Connecting cables (E2-822 or E2-823) NOT included 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%
Expansion cards for Mercury include additional temperature sensor inputs and heater outputs, pressure transducer inputs, stepper motor drive
allowing gas flow regulation and efficient use of liquid helium in flow cryostats and cryogen level metering of both helium and nitrogen.
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