Page 1
User’s Guide
Shop online at
omega.com
e-mail: [email protected]
For latest product manuals:
omegamanual.info
XXXXXX
Xxxxx Xxxxxxxx
Dual Pulse Timer
DPT35
Page 2
OMEGAnet®Online Service Internet e-mail
omega.com [email protected]
Servicing North America:
U.S.A.: Omega Engineering, Inc., One Omega Drive, P.O. Box 4047
ISO 9001 Certified Stamford, CT 06907-0047 USA
Canada: 976 Bergar
Laval (Quebec), Canada H7L 5A1
Toll-Free: 1-800-826-6342 TEL: (514) 856-6928
FAX: (514) 856-6886 e-mail: [email protected]
For immediate technical or application assistance:
U.S.A. and Canada: Sales Service: 1-800-826-6342/1-800-TC-OMEGA
Customer Service: 1-800-622-2378/1-800-622-BEST
Engineering Service: 1-800-872-9436/1-800-USA-WHEN
Mexico: En Español: 001 (203) 359-7803 FAX: (001) 203-359-7807
®
®
®
Servicing Europe:
Benelux: Managed by the United Kingdom Office
Czech Republic: Frystatska 184
733 01 Karviná, Czech Republic
Toll-Free: 0800-1-66342 TEL: +420-59-6311899
FAX: +420-59-6311114 e-mail: [email protected]
France: Managed by the United Kingdom Office
Toll-Free: 0800 466 342 TEL: +33 (0) 161 37 29 00
FAX: +33 (0) 130 57 54 27 e-mail: [email protected]
Germany/Austria: Daimlerstrasse 26
D-75392 Deckenpfronn, Germany
Toll-Free: 0 800 6397678 TEL: +49 (0) 7059 9398-0
FAX: +49 (0) 7056 9398-29 e-mail: [email protected]
United Kingdom: OMEGA Engineering Ltd.
ISO 9001 Certified One Omega Drive, River Bend Technology Centre, Northbank
Irlam, Manchester M44 5BD England
Toll-Free: 0800-488-488 TEL: +44 (0)161 777-6611
FAX: +44 (0)161 777-6622 e-mail: [email protected]
It is the policy of OMEGA Engineering, Inc. to comply with all worldwide safety and EMC/EMI
regulations that apply. OMEGA is constantly pursuing certification of its products to the European New
Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification.
The information contained in this document is believed to be correct, but OMEGA accepts no liability for any
errors it contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, human applications.
Page 3
GENERAL INFORMATION
INPUT CONNECTOR
The DPT35 digital counter-timer is designed to be used with
Omega (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 DPT35 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 DPT35 can be used with dry contact meters, contacting-
head meters with solid-state pickups, or insertion ow sensors.
SPECIFICATIONS*
Power
Sensor Power
Output (2)
Enclosure
Accumulator Range
Timer Range
Maximum Input Frequency
Relay Contact Rating
Temperature
*Specications subject to change
DPT35 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)
DPT35
Connect the Meter. Because the DPT35 comes standard
with a built-in meter connector, the simplest method of connecting your Omega meter to the DPT35 is to order a mating
connector pre-installed on your meter or ow sensor. If your
meter does not have a mating connector, there are three alternatives: 1) Any wire ends can be connected to the DPT35
terminal block (see Connections diagram at right). 2) A ca-
ble-with-connector can be factory-ordered and eld-wired to
your meter. 3) A connector can be factory-ordered 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
To Connector Pin 1
POWER
Ground
Neutral
Hot
3AG-10A-SB
Fuse
H V G
Hot Normally Open
Hot Normally Closed
Neutral
Ground
GND
SIGNAL
GND
SIGNAL
+12 Vdc
PUMP+
GND
SIGNAL
+12Vdc
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 2
Connect Power. A power cord is provided. Connect by plugging
in to any standard grounded outlet. (See Connections Diagram
above for conduit connection.)
Page 4
INSTALLATION and OPERATION
INSTALLATION
Setting. Using the thumb screws, remove the front cover.
1)
Press the SET button. The green ACC (accumulator) light
at the upper left corner of the display will begin blinking,
indicating that the accumulator is ready to be set.
Turn the knob clockwise to increase or counter-
2)
clockwise to decrease until the desired number of
pulses is reached.
Press SET again. The red TIMER indicator will light.
3)
Set the desired time in seconds for output power to
4)
turn on.
Repeat the process to set Accumulator 2 and Timer 2
5)
as needed.
Press SET again to display "SEq" (sequential).
6)
Turn the knob in either direction to switch from "SEq" to
7)
"nSEq" (non-sequential). Sequential operation prevents
the Timer 2 output from operating while Timer 1 is on,
so that chemical feed does not occur during bleed.
Non-sequential operation allows either timer to operate
immediately when its count is reached.
Press SET again to return to normal operation.
8)
Test for TImer Output. To test the timed output(s), press the
“TEST 1” or “TEST 2” button. The red output indicator should
light and remain on for the pre-set number of seconds.
How To Determine Accumulator Setting(s):
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
gallons 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
How To Determine TIMER (Power On Time) Setting(s).
The TIMER time is set to release the desired amount
of chemical to be fed or water to be bled, and is
specic to the pump, valve, etc. being used. When determining the power on time, check that it isn’t more than
the expected time between cycles, to avoid feeding and
bleeding out of order or possible overlap conditions, by
calculating:
Cycle Size (Gallons) 60 sec minimum seconds
Max. Flow Rate (GPM) Min. between cycles
= 12 pulses (accumulator setting)
X =
OPERATION
After setting (when the unit has returned to normal operation,
indicated by no blinking indicators), any display can be selected
at any time by turning the knob. Turning the knob clockwise
causes clockwise rotation among the indicator lights. Stop
turning the knob after arriving at the desired display. This is
the display that will remain until another display is selected.
Possible Overlap Conditions. If the power on time is longer
than the time between on cycles, the on time won’t elapse
before the next on cycle is supposed to start. If this happens,
the power output will remain on, and “OUF” (Overlap, Under
wait time, Failure) will appear on the screen, to alert the user
that a problem has occured. This situation can be avoided by
following the equation above in “How To Determine TIMER
If this result is greater than the determined power on time,
enter the determined power on time into the TIMER setting.
(Power On Time) Setting(s)”. Also note that if in sequential
mode, the sum of the on time, must be less than the minimum
seconds between cycles. Otherwise, one relay will hold up the
other and an overlap condition will occur.
Accumulator Function. The accumulator adds received
pulses once every second, and when the accumulator number
is reached or exceded, the power will turn on. However, any
pulses above the accumulator number will not roll over to the
next cycle, so if the accumulator is set to 20, with 19 pulses
already having been received, and 2 more are received in the
next second, the accumulator will read 0 once the power is
turned on, and not 1.
Page 5
TROUBLESHOOTING
Problem
On/Off switch is fully
in “On” position, but
display is not lighted
There is power, the
On/Off switch is fully
in “On” position, but
display is not lighted
There is power, the
On/Off swich is fully
in “On” position, the
fuse is good, but display is not lighted
The display is
lighted, but the unit
seems to be functioning abnormally
Probable Cause Try...
Unit does not have power
Fuse may be blown
Circuit board component may be bad
No input from the meter
Unit improperly set
Remove front panel and check fuse. If it is
blown, replace with a 3AG-10A-SB fuse
Check ow, check the input indicator light
several minutes may pass between blinks)
Check for power at the cord and outlet
Contact your supplier or the factory to
return unit for repairs
(if the meter is set for a low pulse rate,
Press the “Set” button to review each
setting
Unit appears to be
functioning properly, the test button
causes the timer
indicator to light,
but the appropriate output does not
become powered
Output improperly connected to load
Possible relay failure
Press the approriate “Test” button to force
an output and check (each “Test” button is
located directly above the output it forces)
Contact your supplier or the factory to
return unit for relay replacement
Page 6
NOTES
Page 7
WARRANTY/ DISCLAIMER
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a
period of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month
grace period to the normal one (1) year product warranty to cover handling and shipping time. This
ensures that OMEGA’s customers receive maximum coverage on each product.
If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service
Department will issue an Authorized Return (AR) number immediately upon phone or written request.
Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no
charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser,
including but not limited to mishandling, improper interfacing, operation outside of design limits,
improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of
having been tampered with or shows evidence of having been damaged as a result of excessive corrosion;
or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating
conditions outside of OMEGA’s control. Components in which wear is not warranted, include but are not
limited to contact points, fuses, and triacs.
OMEGA is pleased to offer suggestions on the use of its various products. However,
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any
damages that result from the use of its products in accordance with information provided by
OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by the
company will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR
REPRESENTATIONS OF ANY KIND WHAT SOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF
TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF
LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of
OMEGA with respect
indemnification, strict liability or otherwise, shall not exceed the purchase price of the
component upon which liability is based. In no event shall OMEGA be liable for
consequential, incidental or special damages.
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic
Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical
applications or used on humans. Should any Product(s) be used in or with any nuclear installation or
activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility
as set forth in our basic WARRANTY/ DISCLAIMER language, and, additionally, purchaser will indemnify
OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the
Product(s) in such a manner.
to this order, whether based on contract, warranty, negligence,
RETURN REQUESTS/INQUIRIES
Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE
RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTA IN AN AUTHORIZED RETURN
(AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID
PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return
package and on any correspondence.
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent
breakage in transit.
FOR WARRANTY
following information available BEFORE
contacting OMEGA:
1. Purchase Order number under which the product
was PURCHASED,
2. Model and serial number of the product under
warranty, and
3. Repair instructions and/or specific problems
relative to the product.
OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords
our customers the latest in technology and engineering.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2009 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,
reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the
prior written consent of OMEGA ENGINEERING, INC.
RETURNS, please have the
FOR NON-WARRANTY REPAIRS,
for current repair charges. Have the following
information available BEFORE contacting OMEGA:
1. Purchase Order number to cover the COST
of the repair,
2. Model and serial number of the product, and
3. Repair instructions and/or specific problems
relative to the product.
consult OMEGA
Page 8
Where Do I Find Everything I Need for
Process Measurement and Control?
OMEGA…Of Course!
Shop online at omega.com
SM
TEMPERATURE
Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies
Wire: Thermocouple, RTD & Thermistor
Calibrators & Ice Point References
Recorders, Controllers & Process Monitors
Infrared Pyrometers
PRESSURE, STRAIN AND FORCE
Transducers & Strain Gages
Load Cells & Pressure Gages
Displacement Transducers
Instrumentation & Accessories
FLOW/LEVEL
Rotameters, Gas Mass Flowmeters & Flow Computers
Air Velocity Indicators
Turbine/Paddlewheel Systems
Totalizers & Batch Controllers
pH/CONDUCTIVITY
pH Electrodes, Testers & Accessories
Benchtop/Laboratory Meters
Controllers, Calibrators, Simulators & Pumps
Industrial pH & Conductivity Equipment
DATA ACQUISITION
Data Acquisition & Engineering Software
Communications-Based Acquisition Systems
Plug-in Cards for Apple, IBM & Compatibles
Datalogging Systems
Recorders, Printers & Plotters
HEATERS
Heating Cable
Cartridge & Strip Heaters
Immersion & Band Heaters
Flexible Heaters
Laboratory Heaters
ENVIRONMENTAL
MONITORING AND CONTROL
Metering & Control Instrumentation
Refractometers
Pumps & Tubing
Air, Soil & Water Monitors
Industrial Water & Wastewater Treatment
pH, Conductivity & Dissolved Oxygen Instruments
PL-OM-65200371-062712
6/27/2012
M-5183/0612
M0000/0009
Loading...