Chapter 9. Features and Specifications
172 Model PM880 Portable Hygrometer User’s Manual
9.7 Moisture Measurement
Compatibility
Compatible with all GE aluminum-oxide moisture probes:
M Series, TF Series and Moisture Image Series. Each probe type requires a
different type of I/O cable.
Calibration
GE moisture sensors are computer calibrated to NIST-traceable moisture
concentrations.
9.8 Dew/Frost Point Temperature
Overall Range Capability
• –110° to 60°C (–166 to 140°F)
Available Range Options
• Standard: –80° to 20°C (–112° to 68°F) with data to –110°C (–166°F)
• Ultra-Low: –110° to –50°C (–166° to –58°F)
• High Range Data: –80° to 60°C (–112° to 140°F)
Calibrated Accuracy at 25°C (77°F)
• ±2°C (3.6°F) from –65° to 10°C (–85° to 50°F)
• ±3°C (5.4°F) from –80° to –66°C (–112° to –87°F)
Repeatability
• ±0.5°C (0.9°F) from –65° to 10°C (–85° to 50°F)
• ±1.0°C (1.8°F) from –80° to –66°C (–112° to –87°F)
Operating Pressure
5 µ of Hg to 5,000 psig (345 bar) limited by pressure sensor —
(see pressure measurement specifications)
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