18
Programming Delayed and Intermittent
Sampling
To enter Delayed Start Mode:
From Hold, press Set-up. Enter
the number of minutes delay (up to 9999) before the sampling
period begins by pressing Digit Select and Digit Set. Digit
Select advances the
fl
ashing digit
and Digit Set increases the value
of the
fl
ashing digit.
To enter Sample Period Mode:
Press Mode. Press Digit Select
and Digit Set to enter the sampling
time period in minutes (up to
9999).
Note:
The sample period is
the total period in which sampling
is performed and not the pump run
time.
To enter Pump Period Mode:
Press Mode. This is the actual
running time of the pump. Use
Digit Select and Digit Set to enter
the pump run time in minutes (up
to 9999).
Intermittent Sampling Options:
Option 1 - Sample Period and
Pump Period Both > 10 Minutes
Ensure the Sample Period and
Pump Period are set to be
greater
than 10 minutes.
Set the Pump
Period for less time than the Sample Period to initiate intermit-
tent sampling. The pump will automatically calculate pump “off”
time and run 10 equal cycles of “on” and “off” over the sampling
period beginning with the
fi
rst “on” time. Delayed start may be
used with this option.
Option 2 - Sample Period and Pump Period Both < 10 Minutes
Ensure the Sample Period and Pump Period are set to be
less than
10 minutes.
The minimum “on” or “off” time setting is one minute.
Set the Pump Period for less time than the Sample Period to initiate
intermittent sampling. The pump will automatically cycle “on” and
3
PCXR8 Keypad
continued on page 19
