Overview
The 255-200 is a standard National Weather Service Class A evaporation pan for the 255-100 Evaporation Gauge. It is manufactured by Novalynx.
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Detailed Description
The 255-200 is constructed out of low-carbon, 18-gauge, type-304 stainless steel. The 255-200 is heliarc welded and includes a 1/2-in. drain plug and NPT female coupling. The pan holds approximately 77 gallons of water (i.e., adding 7.7 gallons will raise water level in pan by 1-in).
Specifications
| Material | Low carbon stainless steel, type 304, 18 gauge |
| Construction | Heliarc welded, 1/2-in. drain plug NPT female coupling |
| Volume |
~291 L (~77 gal) Adding 29.15 L (7.7 gal) will raise water level in pan by 2.54 cm (1 in.). |
| Inside Diameter | 120.6 cm (47.5 in.) |
| Inside Depth | 25 cm (10 in.) |
| Wall Thickness | 0.119 cm (0.047 in.) |
| Weight | 22 kg (48 lb) |
Compatibility
This evaporation pan is typically used with the 255-100 Evaporation Gauge.
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FAQs for
Number of FAQs related to 255-200: 2
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The 255-100 Evaporation Gauge is a potentiometer-type sensor. The 255-100 only draws a few milliamps of power momentarily. If the 255-100 is the only sensor in the system, the data logger has an average power draw of approximately 1 mA.
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The Half Bridge instruction should be selected (not the 3 Wire or 4 Wire options) in Short Cut. The following parameters are data logger specific, but the following can be used on the CR1000 datalogger with the sensor wired to SE1, and Vx1:
How many HalfBr Sensors? 1 Total Bridge Resistance 1000 ohm Excitation Voltage 2500 mV Sensors per excitation channel 1 Range of sensor voltage 2500 mV Reverse Excitation Yes Measurement Integration 50 or 60Hz
Settling Time 20000 µs Multiplier Determined during installation (see manual) Offset Determined during installation (see manual)