User`s manual

7800 Series Hysteresisgraph System User's Manual
Introduction 1-3
Specifications (Continued)
Overall Stability – Drift Stabilization Time
Initial: 2 to 3 minute drift check allowed after cited system warm-up period.
Standard: Unit optimizes drift on a run-to-run basis.
System Cycle Time
Calibration: 1 to 2 minutes.
Measurement: 20 to 100 seconds (Test-Cycle Dependent).
Calibration
Model 480 – Fluxmeters have NIST-traceable calibration from the Factory.
Model 450 – Gaussmeters have NIST-traceable calibration from the Factory.
Model 218 – Temperature Monitors have NIST-traceable calibration from the Factory.
PT-111-3S & PT-111-77H – Platinum RTD sensors have NIST-traceable calibration from the Factory.
H Channel – Calibrated via 450 Gaussmeter and 480 Fluxmeter.
B Channel – May be calibrated via 450 Gaussmeter and 480 Fluxmeter.
B Channel – May be calibrated via Lake Shore High Purity Ni reference Material, which has been cross
calibrated to U.S. National Institute of Standards and Technology (NIST) SRM-772a Ni Reference
Material.
System design based on ASTM A977, IEC 404-5, and DIN 50-470 standards.
1.3 REFERENCE MATERIAL
The following are other manuals that comprise the documentation set for the 7800 Series Hysteresisgraph.
• Lake Shore Model 218 Temperature Monitor User’s Manual.
• Lake Shore Model 340 Temperature Controller User’s Manual (Optional).
• Lake Shore Model 450 Gaussmeter User’s Manual.
• Lake Shore Model 480 Fluxmeter User’s Manual.
• Lake Shore Model EM4 Series/EM7 Electromagnet User’s Manual.
• Lake Shore Model 662, 665, or 668 Power Supply Technical Manual.
• GMW Model 3474 250MM Electromagnet User’s Manual
1.4 SAFETY SUMMARY
Observe these general safety precautions during all phases of instrument operation, service, and repair. Failure to
comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of
design, manufacture, and intended instrument use. Lake Shore assumes no liability for Customer failure to comply
with these requirements.
The enclosure protects the operator and surrounding area from electric shock or burn, mechanical hazards,
excessive temperature, and spread of fire from the instrument. Environmental conditions outside of the conditions
below may pose a hazard to the operator and surrounding area.
• Indoor use.
• Altitude to 2,000 meters.
• Temperature for safe operation: 5 °C to 40 °C.
• Maximum relative humidity: 80% for temperature up to 31 °C decreasing linearly to 50% at 40 °C.
• Power supply voltage fluctuations not to exceed ±10% of the nominal voltage.
• Transient overvoltages according to OVERVOLTAGE CATETORIES I, II, and III (IEC 1010). For mains
supply the minimum and normal category is II.
• Pollution Degree 2 in accordance with ICE 664.