LT-10018-A
Page 1 of 4
PT34 Single Pulse Timer
PT35 Dual Pulse Timer
Instructions
General Information
The PT34 and PT35 digital counter-timers are designed
to be used with SeaMetrics (or similar) meters and flow
sensors which produce a pulse signal. They are typically
used in water treatment and chemical dosing applica-
tions, most often in cooling towers and boilers. The first
function of these units is the accumulator, which counts
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
chemical feed and one water bleed) the PT35 has dual
accumulators and timers. Input is from a single meter or
flow sensor, but the accumulators and timers are set in-
dependently of each other. A sequential function can be
selected to lock one timer out while the other is operat-
ing. This prevents feed and bleed from occurring simul-
taneously.
A 12 VDC low-current meter loop is standard. This can
be used with dry contact meters, as well as contacting-
head meters with solid-state pickups (SeaMetrics ME
meters) or insertion flow sensors (SeaMetrics IP line).
Specifications
Power
115 VAC
Sensor Power
12 VDC
Enclosure
5" x 7" polycarbonate
Accumulator Range
1 - 9,999 pulses
Timer Range
1 - 9,999 seconds
Maximum Input Frequency
1000 Hz
Relay Contact Rating
5 A resistive @ 115
VAC, or 1/4 HP
Temperature
32º-130º F (0º-55º Cº)
INPUT INDICATOR LIGHT
EASY-OFF COVER
TEST BUTTONS
FORCE ONE
TIMED OUTPUT
PRE-WIRED OUTPUTS
AND POWER CORD
METER INPUT CONNECTOR
SETTING KNOB
+ increase clockwise
+ decrease counter-clockwise
BRIGHT LED DISPLAY
+ visible in low light
AR
CH
IVE
D
