SECTION 7. MEASUREMENT PROGRAMMING EXAMPLES
7-15
The multiplier, m, is calculated to convert the
reading to feet of water.
m = 0.0151 (psi/digit)
∗
2.3067 (ft of water/psi)
∗
-1000 digits/kHz
2
= -34.831 ft of water/kHz
2
After the probe reaches thermal equilibrium, the
initial temperature, t
0
, is measured to be 24
°
C.
The water column above the sensor is referred
to as the "Reading". The Reading decreases
with increasing "Distance" from lip of well to
water surface so the Distance is computed by
subtracting the Reading from the Offset as
shown in Figure 7.13-2.
The "Initial Distance" to the water surface is
measured with a chalked line to be 47.23 feet
below the lip. The first time the program is
executed, the program calculates the offset
(Offset = Di Reading) required to obtain
a reading of 47.23 feet. The offset is stored in
Location 4 and applied to subsequent
measurements.
NOTE:
Following program compilation in
the
∗
0 Mode, all input locations are set to
zero. This fact is utilized to detect the first
execution following a program compilation.
The example assumes the sensor has been
connected as shown here.
CR510 & AVW1
FIGURE 7.13-2. Well Monitoring Example
Summary of Contents for CR510
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Page 44: ...SECTION 1 FUNCTIONAL MODES 1 14 This is a blank page ...
Page 56: ...SECTION 3 INSTRUCTION SET BASICS 3 8 ...
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Page 128: ...SECTION 10 PROCESSING INSTRUCTIONS 10 8 This is a blank page ...
Page 144: ...SECTION 12 PROGRAM CONTROL INSTRUCTIONS 12 10 This is a blank page ...
Page 172: ...SECTION 14 INSTALLATION AND MAINTENANCE 14 10 This is a blank page ...
Page 176: ...APPENDIX A GLOSSARY A 4 This is a blank page ...
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Page 188: ...APPENDIX D DATALOGGER INITIATED COMMUNICATIONS D 4 This is a blank page ...
Page 196: ...APPENDIX F MODBUS ON THE CR10 X AND CR510 F 4 This is a blank page ...
Page 197: ...APPENDIX G TD OPERATING SYSTEM ADDENDUM FOR CR510 CR10X AND CR23X MANUALS ...
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Page 206: ...TABLE DATA ADDENDUM AD 6 This is a blank page ...
Page 222: ...TD ADDENDUM SECTION 1 FUNCTIONAL MODES AD 1 8 This is a blank page ...
Page 238: ...TD ADDENDUM SECTION 8 PROCESSING AND PROGRAM CONTROL EXAMPLES AD 8 10 This is a blank page ...
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