Seametrics PT35 Operating Manual

PT35
ISO
DUAL PULSE TIMER INSTRUCTIONS
Bright LED Display + visible in low light
PT35 DUAL PULSE TIMER INSTRUCTIONS
Input Indicator Light
Test Buttons Force One Timed Output
Easy-Off Cover
Meter Input Connector
Pre-Wired Outputs and Power Cord
9 001:2008
CERTIFIED COMPANY
GENERAL INFORMATION
INPUT CONNECTOR
The PT35 digital counter-timer is designed to be used with
Seametrics (or similar) meters and ow sensors that produce a
pulse signal. It is typically used in water treatment and chemical dosing applications, most often in cooling towers and boilers. The PT35 serves as either a single or a dual timer, depending on whether one or both of its independent accumulators and timed outputs are used.
In single timer applications, one accumulator counts pulses coming from the meter. When a pre-set number of pulses has been reached, output power turns on for a set time, and then the cycle repeats.
In dual timer applications (typically, one chemical feed and one water bleed), both accumulators and timers are set to operate independently with input from a single meter. A sequential function can be selected to lock one timer out while the other is operating. This prevents feed and bleed from occurring simultaneously.
INSTALLATION and CONNECTION
Mounting. Use a secure surface that will accept screws. Remove the front clear cover by use of the thumb screws to access the mounting holes at the four corners. Using the box as a template, mark the centers of the holes with a pencil and drill. Insert screws through the four corner holes and tighten.
The PT35 can be used with dry contact meters (e.g. Seametrics MJR meters), contacting-head meters with solid-state pickups
(e.g. Seametrics MJE meters), or insertion ow sensors (e.g.
Seametrics IP, TX, and EX Series).
SPECIFICATIONS*
Power
Sensor Power
Output (2)
Enclosure
Accumulator Range
Timer Range
Maximum Input Frequency
Relay Contact Rating
Temperature
*Specications subject to change • Please consult our website for current data (www.seametrics.com).
PT35 Connections Diagram
115 Vac
12 Vdc
115 Vac
5” x 7” polycarbonate
1 - 9999 pulses
1 - 9999 seconds
1000 Hz
5 A resistive @ 115 Vac, or 1/4 HP
32˚ - 130˚ F (0˚ - 55˚ C)
PT35
Connect the Meter. Because the PT35 comes standard with
a built-in meter connector, the simplest method of connect­ing your Seametrics meter to the PT35 is to order a mating
“Seametrics connector” pre-installed on your meter or ow
sensor. If your meter does not have a Seametrics connector, there are three alternatives: 1) Any wire ends can be con­nected to the PT35 terminal block (see Connections diagram at right). 2) A cable-with-connector can be factory-ordered
and eld-wired to your meter. 3) A connector can be factory­ordered and eld-installed on your meter output cable (see
Connector Field Installation diagram below).
Connector Field Installation
3
1
2
Hall-effect or transistor switch
1POWER GND 2 INPUT SIGNAL 3POWER OUTPUT +12 Vdc
BLACK
WHITE
RED
To Connector Pin 1
To Connector Pin 2
To Connector Pin 3
POWER
Ground Neutral
Hot
3AG-10A-SB
Fuse
H V G
Hot Normally Open
Hot Normally Closed
GND SIGNAL
GND SIGNAL +12 Vdc
PUMP+ GND SIGNAL
+12Vdc
Neutral Ground
OUTPUT 2
NO NC N G
DRY CONTACT TYPE METER
EXTERNALLY- PACED METERING PUMP
OUTPUT 1
SOLID STATE TYPE METER
SOLID STAT E TYPE METER
NO NC N G
Ground Neutral Hot Normally Closed Hot Normally Open
P G S V
Input Connections
Connect the Load. Two output cords are provided for connec-
tion of 115 Vac loads. The unit can be hard-wired if necessary, using the terminals inside.
Dry contact
To Connector Pin 1
To Connector Pin 2
Connect Power. A power cord is provided. Connect by plugging in to any standard grounded outlet. (See Connections Diagram above for conduit connection.)
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