Item_Specifications.docx

Minimum Requirements 6 Oct 15

1. Scope of Work

This is system is a Thermoelectric Quartz Crystal Microbalance (TQCM) that uses a 15MHz quartz crystal

Technical Requirements

The system shall meet the following requirements and specifications and must be delivered with a calibration certificate.

1.1. Self-cooling capability must be better than a ∆T of 70C @ ambient temperature.

1.2. The system is also required to contain a bakeout feature for eliminating accumulated contaminants

1.3. 15 MHz Crystal

1.3.1. Mass Sensitivity: 5.09 x 108 (Hz/g)cm2

1.3.2. Mass Range: ~2.95 x 10-4 g/cm2

1.4. Sensor Output: 1 to ~250 KHz

1.5. Output Impedance: 12 KOhms

1.6. Temperature Range

1.6.1. Passive: -199C to 100C

1.6.2. Active: -80C to 100C

1.7. Pressure: Ambient to Hard Vacuum

1.8. Peltier Heat Load:≤ 6.25 W

1.9. Supply Voltage: 8 to 12 Vdc (10V nominal)

1.10. Electronics:

1.10.1. Power: ~120 mW @ 10Vdc

1.10.2. Signal Amplitude: >6 to 10Vpp

1.10.3. Voltage Sensitivity: < 23 Hz/V

1.11. Dimensions:

1.11.1. Body: 31.75mm (1.250”) Diameter X 71.04mm (2.797”) Long ±2.5mm

1.11.2. Heat Sink: 52.07mm (2.050”) Diameter X 7.62mm (0.300”) Thick ±2.5mm

1.12. Chamber Interface: CF 2.5” Flange

1.13. Weight:≤ 120 g

1.14. Provide two copies of the Training and operational manuals.

1.15. Delivery within 4 weeks after award