A key function of the PVC is to act as an "Interlock Hub" to provide protection to the gauge and your system. The Interlock Hub is completely user-configurable, often removing the need for external sensor/switch units and reducing the amount of hard wiring required.
The Interlock Hub links together the ion gauge performance, the secondary gauge measurements, digital output trips, digital inputs, analogue outputs and bake-out in a simple to define user-configurable matrix:
PVCuni and PVCduo
PVCuni: 1x Dual filament UHV. Thoria- or Yttria-coated Iridium filaments
PVCduo: 2x Dual filament UHV. Thoria- or Yttria-coated Iridium filaments (simultaneous operation of both gauges)
Constant current dc (4A/9V)
µprocessor controlled precision PID control
User selections: 0.06, 0.1, 0.15, 0.25, 0.4, 0.6, 1, 1.5, 2.5, 4, 6, 10mA
Emission automatically adjusts for optimum performance at the measured pressure
Soft-start. Optional "new filament" setting to permit gentle heating.
User-definable min & max emission
Ramped low/mid/high power
User-defined ramp/soak periods. User-defined pressure suspend to allow vacuum recovery.
Continuous measurement during degas
No interruption to pressure measurement during degas start/stop
Effective Range: 0.1pA to 1mA; equates to 1x10-13 to 1 mBar (gauge dependent)
High thermal stability, low drift
1.0 to 99.9 (resolution 0.1)
User-defined auto pump-down: backing gauge dependent ion gauge start-up pressure; trip allocation for external events (valves...), delay time, restart time etc...
|SECONDARY & TERTIARY GAUGES:|
Supports VSP521 or VSP841. User calibration available.
Number of Modules:
Tertiary Gauge Module Options:
"V": VG Pirani
"W": Universal for output from other gauge controllers or active gauge heads such as cold-cathode gauges (e.g. PKR251/261, IKR270), mini-convectron, Stinger, microPirani...). Note: some of the gauges can draw their power from this module (max 100mA@14.5V).
Type K thermocouple. Standard mini-thermocouple connector
Room temperature to 900°C (16 bit resolution).
Reproducibility <±0.2°C. Absolute <±2°C. User calibration available.
6x ramp/soak steps, each up to 99.9 hours duration.
Individual trip allocation for power switching (e.g. 3 trips for 3Φ).
User-defined pressure interlocking (ramp suspend/time suspend/abort).
User-defined temperature hysteresis.
Optional auto-degas at end of bake-out.
7 (4x SPCO relays 1A24Vdc/ 0.5A125Vac + 3x NPN open collector 100mA/12Vdc)
Individually assignable: external interlock to any ion or backing gauge, ion gauge status (on, off, degas), bake-out power switching, pump down external drive...
4x opto-isolated inputs. 3-30Vdc; 2.4kΩ input resistance.
Digital Input assignment:
External interlock as trip for ion gauge; control over ion gauge on/off and degas either via input state or toggle state, bake-out trip, pump-down trip, backing gauge operation...
Interlock Response times:
0.2 sec max.
Full scale range: 0V to 10.2V (12 bit resolution).
User-definable min and max voltage and related pressure value
Precision reference-based: <±0.2%.
Ion gauge (emission and sensitivity corrected), any secondary gauge, gauge combinations, bake-out temperature...
User-defined voltage range vs. assigned pressure/temperature range.
Linear or logarithmic relationship...
19" rack mounting: WxHxD: 484x44x260mm
115/230Vac. Live and Neutral fused: 2A for 230Vac, 3.15A for 115V
4W (ion gauge off); max: 40W (high degas); typical: 4-10W (ion gauge on).
Single gold OLED display. Graphical 200x16 pixel resolution
Pressure: 1 or 2 decimal place resolution; Current: 4 significant digits (mA/µA/nA/pA)
Secondary/Tertiary gauges: 1 decimal place resolution.
Temperature: <0.05°C measurement resolution, 0.1°C display resolution.
Intuitive menu-driven via 5 front panel touch buttons
Multi-drop RS232 (up to 8 units (port dependent)) and RS485-3 wire (up to 16 units).
[Mid-2014: TCP/IP option]
4800, 9600, 19200, 38400, 57600 baud.
Parity: None, Odd or Even. 8 bit + 1 start + 1 stop
MODBUS RTU protocol. Multiple parameter read/write; floating point resolution.
QueBUS protocol: ASCII-based with multi-parameter read/write messaging.
2x RJ45 for simple daisy-chaining
Dimensions of all PVC models. Please add 50mm for rear panel earth stud and connectors