Xylem DH-21 - Manual (Page 42)

3-24 Using the “W ATER LOG” Software
DH-21
The WaterLOG Serial # T2000 Version 1.1
Status = OFF (VARIABLE) Last Measurement Units
Date/Time = 02/28/95 04:11:54
Date Started = 02/28/95 04:00:00 PRESSURE = -0.0051 PSI
Logging Rate = 00:01:00 TEMPERATURE = 78.38 Deg F
Next Log Time = 04:12:51
Memory Used = 0.1 %
Logging Count = 16 Scans
Battery = 6.8 Volts
1) Run 4) Time/Date 7) User Notes 10) Measure Data
2) Off 5) Logging Mode 8) Extract Data 11) Zero Sensor
3) Reset 6) Coefficients 9) View Data 12) Sensor Info
13) Diagnostics
Enter Option: 11 Esc-Exit
Zero Sensor
This will measure the current pressure and automatically adjust the
sensor's offset coefficient to produce a zero output value.
Continue? y (y/n)
Esc-Exit
Figure 3-21. Zero Sensor Option
The Zero Sensor option can also be used periodically to remove errors in pressure due to long-
term drift. To do this, remove the “
W ATER LOG” from the water and allow it to settle for about
20 minutes (The sensor temperature will likely be changing rapidly so you must allow it to
settle). Issue the Zero Sensor option and the pressure output will go to very near 0.0000.
3.2.12 Sensor Information Option
You can see information about your “ W ATER LOG” sensor by invoking option number 12 as
shown in Figure 3-22. The Vendor, Model Number, Firmware Version, Printed Circuit Board
Serial Number, Product Serial Number, and Product Revision number are available for technical
support purposes.