PN: 2975 Rev F, 3/2004
Page 19 of 24
C R Y S T A L
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Specifications
Accuracy specifications are for one year, and include all effects of linearity, hysteresis,
repeatability, and temperature within the specified operating temperature range.
The gauge must be exercised and re-zeroed whenever exposed to significant changes in
environmental conditions to achieve these specifications. To exercise the gauge, cycle the
gauge between zero and the pressure of interest. A properly exercised gauge will return to a
perfect zero reading.
Exposure to environmental extremes of temperature, shock and/or vibration may warrant a
more frequent recertification period.
Accuracy
20 to 100% of Full Scale: ±0.1% of reading
0 to 20% of Full Scale: ±0.02% of Full Scale
Vacuum*, for 2000 kPa (300 PSI) and lower pressure gauges:
0 to -14.5 PSIG (0 to -99.9 kPa): ±0.25% of Full Scale,
where F.S. = -14.5 PSI (-99.9 kPa)
*Not specified for 500 PSI/ 30 bar/ 3000 kpa models and higher, although all models can
be safely connected to vacuum.
Temperature
Operating & Compensated Range: -10°C to 50°C (14°F to 122°F)
Storage Range: -20°C to +70°C (-4°F to +158°F)
Humidity
Temperature Range Humidity
-10 to 10°C ........................ Uncontrolled
10 to 30°C ......................... 0 to 95% Relative
30 to 40°C ......................... 0 to 75% Relative
40 to 50°C ......................... 0 to 45% Relative
Media Compatibility
Liquids and gases compatible with 316 Stainless Steel.
Pressure Conversions
1 PSI = 27.6806 inches of water column (water at 4°C [39.2°F])
27.7070 inches of water column (water at 15.6°C [60°F])
27.7292 inches of water column (water at 20°C [68°F])
2.03602 inches of mercury (mercury at 0°C [32°F])
6.8948 kilopascals
51.7149 millimeters of mercury (mercury at 0°C [32°F])
703.087 millimeters of water column (water at 4°C [39.2°F])
0.068948 bar
68.948 millibar
0.070307 kilograms per square centimeter
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