Seametrics PT33 - Manual (Page 4)

Operation
Test for Proper Operation
·Turn the power switch to ON. The power indicator
should light.
·Set a short time. Then press the TEST button. The
TIMER indicator should light and stay on for the length
of time set.
·When the meter is operating, the INPUT indicator should
light periodically. Note that at low flow rates or low pulse
rates (such as 100 G/P) there may be a considerable
interval between inputs.
Changing Settings
When a time or count setting is changed, it is necessary
to reset to the new number. This can be done by press-
ing the test button, turning power off and back on, or by
simply waiting for a new count or time cycle to begin.
PT33 Timer Operation
Standard operation of PT33 timers is independent, and
if the accumulators are set to different numbers the
timers will operate at different times. However, if accu-
mulator settings are the same, the timers will operate
simultaneously. If this is undesirable, the unit can be
factory or field-set for sequential operation (see con-
nections diagram, p.3). This means that the two timers
will never come on at the same time. Timer #2 will wait
until timer #1 is finished before operating. This feature
is set by a jumper. It can also be field-set by removing
the front panel and moving a jumper into the appropri-
ate position.
Troubleshooting and Repair
If the unit fails to work properly, first check for power. If
power indicator fails to light when the power switch is
on, either there is no power to the unit or a fuse has
blown. Remove the front panel to change the fuse. For
the PT32, use a 3AG-5A-SB fuse. The PT33 requires a
3AG-10A-SB.
How to Determine Accumulator Setting(s):
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If the meter pulses once every gallon,
set the accumulator for the number of gallons desired
between timer cycles. For meters with multiple pulses
per gallon, multiply the desired number of gallons by
the pulses per gallon. For meters with multiple gal-
lons between pulses, divide the desired gallons by the
gallons per pulse.
Example:
The goal is one timer output every 60 gallons. The
meter has a 5 gallons per pulse (G/P) output.
60 gallons
5 gallons/pulse = 12 (accumulator setting)
The other common problems are incorrect setting and
lack of meter input. Double check to be sure that the
desired number has been set, particularly the position
of the multiply-by-ten switch. Meter input can be checked
by watching for the INPUT indicator to light.
How To Determine Timer Setting(s). The timer set-
ting is based on the desired amount of chemical to be
fed or water to be bled, and is specific to the pump,
valve, etc. being used. When calculating the time be
sure it isn’t more than the expected time between
cycles, to avoid overlapping. Check by calculating:
Cycle Size (Gallons)
Max. Flow Rate (GPM) = min. between cycles
x 60 = sec. between cycles
PT32 and PT33 timers are not designed for field repair.
Any circuit board work must be done at the factory.
Please obtain a returned material authorization (RMA)
number from the factory or your distributor before re-
turning your unit.
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