Xylem DH-21 - Manual (Page 30)

3-12 Using the “W ATER LOG” Software
DH-21
is calculated by taking the regular scan rate and dividing it by the hyper divisor.
The hyper divisor must be able to be divided into the regular scan rate without a
remainder or it will default to 1. For example, if the regular scan rate is 1
minute, the following hyper divisors are valid:
SCAN RATE HYPER DIVISOR FAST SCAN RATE
1 minute 60 1 seconds
1 minute 30 2 seconds
1 minute 20 3 seconds
1 minute 15 4 seconds
1 minute 12 5 seconds
1 minute 10 6 seconds
1 minute 6 10 seconds
1 minute 5 12 seconds
1 minute 4 15 seconds
1 minute 3 20 seconds
1 minute 2 30 seconds
1 minute 1 60 seconds
This option allows the sensor to capture and record quick changing data without the expense of
battery life by adjusting the scan rate based on the data change rate. It also saves memory by not
logging data when the data is not changing significantly.
Note that this check is on the level parameter only, not the temperature, and the values entered
for the Hyper Limit and Delta Limit will be in the same units as set in the coefficients options.
For example, if the coefficients Pressure / Level option is set to feet, the Hyper Limit and Delta
Limit will also be in feet.