Seametrics PT33 - Manual

PUB -19125-1000
Page 1 of 4
General Information
PT32 Single Pulse Timer
PT33 Dual Pulse Timer
Instructions
PT32 and PT33 pulse timers are designed for use with
SeaMetrics (or similar) meters and flow sensors which
produce a pulse signal. They can control metering
pumps or valves in a variety of cooling tower, boiler and
other water treatment applications. These units include
accumulators, which count pulses from the meter. When
a preset number has been reached, output power turns
on for a set time and then the cycle repeats.
For applications requiring dual timers (typically one for
feed and one for bleed), the PT33 has two timers and
accumulators in one enclosure. Input is from one meter,
but the accumulators and timers are set independently
of each other. A sequential feature locks one timer out
while the other is operating, to prevent bleed and feed
from occurring simultaneously.
A 12 VDC low-current meter loop is a standard feature.
This can be used with brass pulse meters, as well as
most of the SeaMetrics line of insertion, turbine, and
low-flow meters. Both dry-contact reed switch and solid-
state Hall-effect sensor signals are accepted.
Specifications
Power 115 VAC
Accumulator Range 1 - 1270 counts
Timer Range 1 - 1270 seconds (21 min.)
Enclosure Glass-filled polycarbonate,
PT32 5" X 5"
PT33 5" X 7"
Max Input Frequency 500Hz (500 pulses/sec.)
Relay Contact Rating 5 A resistive at 115 VAC
Sensor Power
25 mA at 12 VDC nominal
OFF ON
TEST
INPUT
OUTPUT
PT32
ACCUMULATOR - TIMER
COUNTS
32
16
8
4
2
1
Setting equals the
sum of the
switches turned "ON".
Output time equals
the sum of the
switches turned "ON".
64
32
16
8
4
2
1
SECONDS
64 This switch "ON"
multiplies by 10
This switch "ON"
multiplies by 10
OFF ON
T
I
M
E
R
A
C
C
U
M
Input and
Output Indicators
Output test and
Accumulator reset
button
Accumulator
setting switches
Timer setting
switches
Power switch
and indicator
Cover screws
and box mounting
screw holes
Three pin SeaMetrics connector
standard, strain relief optional
(order matching connector
with meter)
Power input cord
(6’ length)
Timer output
cord (7" length)
Internal 5 Amp
replaceable fuse
behind panel
PT32 Features
DIS
CON
TIN
UED