TPS

TPS is short for Total Precipitation Sensor. This page is the result of a few notes Bob put together while testing out one of the ARM TPS's from Barrow.

Testing goals:

See that accumulated precipitation is consistent between drip sessions.

Supplies

1. A computer with a serial port. Choose a computer program or set up that allows received data to be redirected from the port to a file.
2. A syringe with known volume
3. A water source

Procedure:

• When the current precipitation rate is zero before any liquid has been poured on the sensor type '/R<Enter>' to reset the accumulated precipitation total.

/R Reset precip total? (Y/N): Y                                                
Total reset to zero.                                                           

• Put the sensor in automatic output mode by typing '/L<Enter>' followed by the output interval rate in seconds '60<Enter>'

• Add water. Be careful when sprinkling water on the sensor to keep all water in the center circle and be careful that the syringe doesn't squirt extra water out on its own (easy to do towards the end of the squirting operation).

Results from a Barrow TPS

Some results from the Barrow TPS 4/14/2009:

Water Added     Accumulation
miliLiters      milimeters of water
6               0.55
10              0.9

Here's what the rate looks like for example (adding all the water to the sensor in two doses, not letting the sensor become dry):

001,1239731220,0000000,00.00,00000.00,023.8,032.7,00.0*526E                    
001,1239731280,0000000,00.00,00000.00,023.8,032.7,00.0*407C                    
001,1239731340,0000000,00.00,00000.00,023.8,032.7,00.0*1DA2                    
001,1239731400,0000000,02.27,00000.01,023.8,032.7,00.0*03B3                    
001,1239731460,0000000,01.04,00000.04,023.8,032.8,00.0*48AA                    
001,1239731520,0000000,00.86,00000.05,023.7,032.8,00.0*7F31                    
001,1239731580,0000000,00.96,00000.07,023.7,032.8,00.0*5581                    
001,1239731640,0000000,00.97,00000.08,023.7,032.8,00.0*1E16                    
001,1239731700,0000000,00.98,00000.10,023.7,032.8,00.0*119E                    
001,1239731760,0000000,01.00,00000.12,023.7,032.8,00.0*60DB                    
001,1239731820,0000000,01.00,00000.13,023.7,032.8,00.0*5C24                    
001,1239731880,0000000,01.02,00000.15,023.7,032.9,00.0*5328                    
001,1239731940,0000000,01.01,00000.17,023.7,032.9,00.0*7156                    
001,1239732000,0000000,01.73,00000.19,023.8,032.9,00.0*7DB1                    
001,1239732060,0000000,01.08,00000.21,023.8,032.9,00.0*858B                    
001,1239732120,0000000,00.93,00000.23,023.8,032.9,00.0*B7F6                    
001,1239732180,0000000,00.94,00000.25,023.8,032.9,00.0*60FB                    
001,1239732240,0000000,00.92,00000.26,023.8,032.9,00.0*3450                    
001,1239732300,0000000,01.02,00000.28,023.8,032.9,00.0*C510                    
001,1239732360,0000000,01.00,00000.29,023.8,032.9,00.0*72B0                    
001,1239732420,0000000,01.04,00000.31,023.8,032.9,00.0*2949                    
001,1239732480,0000000,01.01,00000.33,023.8,032.9,00.0*8AFA                    
001,1239732540,0000000,01.01,00000.34,023.8,032.9,00.0*A295                    
001,1239732600,0000000,01.04,00000.36,023.8,032.9,00.0*1A87                    
001,1239732660,0000000,01.04,00000.38,023.8,033.0,00.0*AA2A                    
001,1239732720,0000000,00.97,00000.40,023.8,033.0,00.0*613E                    
001,1239732780,0000000,01.09,00000.41,023.8,033.0,00.0*8696                    
001,1239732840,0000000,01.06,00000.43,023.8,033.0,00.0*3270                    
001,1239732900,0000000,01.12,00000.45,023.8,033.0,00.0*3A5A                    
001,1239732960,0000000,01.17,00000.47,023.8,033.0,00.0*85F5                    
001,1239733020,0000000,01.15,00000.49,023.8,033.0,00.0*BE89   
001,1239733080,0000000,01.21,00000.51,023.8,033.0,00.0*79DC                    
001,1239733140,0000000,01.16,00000.53,023.9,033.0,00.0*D3A7                    
001,1239733200,0000000,01.05,00000.55,023.9,033.0,00.0*14F6                    
001,1239733260,0000000,00.42,00000.56,023.9,033.0,00.0*C2FC                    
001,1239733320,0000000,00.09,00000.56,023.9,033.0,00.0*583F                    
001,1239733380,0000000,00.18,00000.56,023.9,033.0,00.0*48D0                    
001,1239733440,0000000,00.14,00000.57,023.9,033.0,00.0*F1D1                    
001,1239733500,0000000,00.15,00000.57,023.9,033.0,00.0*F918                    
001,1239733560,0000000,00.14,00000.57,023.9,032.9,00.0*2029                    
001,1239733620,0000000,00.12,00000.57,023.9,032.9,00.0*E79B                    
001,1239733680,0000000,00.15,00000.58,023.8,032.9,00.0*6DB8                    
001,1239733740,0000000,00.11,00000.58,023.9,032.9,00.0*7865                    
001,1239733800,0000000,00.12,00000.58,023.8,032.9,00.0*BC37                    
001,1239733860,0000000,00.13,00000.58,023.8,032.9,00.0*30C7                    
001,1239733920,0000000,00.12,00000.58,023.8,032.9,00.0*380E                    
001,1239733980,0000000,00.15,00000.59,023.8,032.8,00.0*4BB3                    
001,1239734040,0000000,00.14,00000.59,023.8,032.8,00.0*2FC0                    
001,1239734100,0000000,00.15,00000.59,023.8,032.8,00.0*2709