Omega DOCN600 User Manual

User’s Guide

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DOCN600

Dissolved Oxygen System

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Servicing North America:

U.S.A.: One Omega Drive, P.O. Box 4047

ISO 9001 Certified Stamford, CT 06907-0047

TEL: [phone] FAX: [phone]
e-mail: [e-mail]

Canada: 976 Bergar

Laval (Quebec) H7L 5A1, Canada
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For immediate technical or application assistance:

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Servicing Europe:

Benelux: Postbus 8034, 1180 LA Amstelveen, The Netherlands

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Czech Republic: Frystatska 184, 733 01 Karviná, Czech Republic

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France: 11, rue Jacques Cartier, 78280 Guyancourt, France

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Toll Free in France: 0800 466 342
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Germany/Austria: Daimlerstrasse 26, D-75392 Deckenpfronn, Germany

TEL: [phone] FAX: [phone]
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United Kingdom: One Omega Drive, River Bend Technology Centre

ISO 9002 Certified Northbank, Irlam, Manchester

M44 5BD United Kingdom
TEL: [phone] FAX: [phone]
Toll Free in United Kingdom: 0800-488-488
e-mail: [e-mail]

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.

TABLE OF CONTENTS

GENERAL INFORMATION 1

SPECIFICATIONS 2

INSTALLATION 4

DESCRIPTION OF FUNCTIONS 8

START-UP AND OPERATION 13

OPERATING HINTS 17

UTILITY MENU 18

DIAGNOSTICS 20

TROUBLESHOOTING AND SERVICE 21

MODEL DOCN600 DISSOLVED OXYGEN ANALYZERS

AND MODEL DOE-601 DISSOLVED OXYGEN SENSOR

INSTRUCTION MANUAL

1.0 GENERAL INFORMATION

The DOCN600 Dissolved oxygen analyzer is a versatile industrial microprocessor based instrument.
Outputs are programmed through the menu with push buttons on the face of the instrument.
Calibration is also accomplished through the front panel menu. The instrument must be used in
conjunction with the DOE-601 dissolved oxygen sensor.

The instrument provides non-isolated 0-5 Vdc, 0-1 mA and isolated 4-20 mA analog outputs. The
analog outputs may be programmed to represent any segment of the measuring scale.

A membrane perforation alarm is provided which gives early warning of a membrane failure.

The instrument can also be used to take a temperature reading and one of the non-isolated analog
outputs can be used to give a continuous temperature signal.

The integrity of the system is ensured with a watch-dog timer and system alarm. A password

feature protects the stored values.

The instrument is housed in a NEMA 4X enclosure. The standard unit is provided with mounting
hardware for surface mount applications. Both panel and pipe mount kits can be ordered
separately.

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2.0 SPECIFICATIONS

DISPLAY:

3 1/2 digit LED, 1/2" high digits

MEASURING RANGES:

D.O.: 0-20.00 ppm and 0-100% saturation, switch
selectable
Temperature: 0-40°C (32 to 104°F)

POWER REQUIREMENTS:
98-132 Vac, 50/60 Hz (less than 10 VA)
Optional: 196-264 Vac, 50/60 Hz

AMBIENT CONDITIONS:

-30 to 50°C (-22 to 122°F)
0 to 90% R.H. non-condensing

ANALOG OUTPUTS:

Non-isolated 0-1 mA, 100 ohms maximum load
Non-isolated 0-5 Vdc, 1000 ohms minimum load
Isolated 4-20 mA, 800 ohms maximum load

The isolated output is isolated from the input, ground
line power and all other outputs
Range Expand: The 4-20 mA analog output can be
made to represent any segment of the measuring
scale. Minimum segment is 10% of full scale.
Output Hold: The analog outputs are automatically
placed on hold during calibration or other setup
operations.
Temperature Output: The 0-5 Vdc output can be
programmed to follow either the process temperature
or dissolved oxygen.

TEMPERATURE COMPENSATION:

Automatic 0 to 100°C (32 to 212°F)

ALTITUDE COMPENSATION:

Automatic 0 to 40°C (32 to 104°F)

DIAGNOSTICS:

When system error is indicated, call STATUS to obtain
condition code. On-board simulated input to aid in
troubleshooting to obtain condition code.

MEMBRANE ALARM:

A relay activates if membrane is perforated.

TEST:

Display value and analog outputs can be set manually

to any value for testing and diagnostic purposes. This
feature allows the outputs to be tested independently
of process value.

SAFETY & SECURITY:

Non-volatile memory (EEPROM)
Passcode protected if selected
Watch-dog timer monitors microprocessor
Instrument automatically returns to on-line operation if
accidentally left in menu mode
(This feature may be held disabled if desired)

ACCURACY: % Saturation: ± 1%
ppm: ± 0.1
Temp: ± 0.2°C

STABILITY: 0.1% of span per 24 hrs., non-cumulative

RESOLUTION: % Saturation: 0.1

ppm: 0.01
Temp: 0.1°C

REPEATABILITY: 0.1% of span or better

RESPONSE TIME: 20 seconds to 90% of value upon

step change at 20°C

ENCLOSURE: NEMA 4X fiberglass reinforced polyester

enclosure with four 1/2” conduit holes and mounting
feet for surface mount

MOUNTING CONFIGURATIONS:
Standard is surface mount
Optional panel mount hardware. Part No.
Optional pipe mount hardware. Part No.

NET WEIGHT: 3 1/2 lbs. (1.6 kg)

DOCN600-PM

DOCN600-PIPE

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Rating: 5A 115/230 Vac, 5A 30 Vdc. SPDT

Three LEDs indicate status or the three relays

CONTROL RELAYS:

Two relays can be independently set for operation in
response to rising or falling value and for fail-safe
operation. Deadband (hysteresis) independently
adjustable.

Rating: 5A 115/230 Vac, 5A 30 Vdc. SPDT

ALARM RELAY:

High-Low with fixed deadband of 2% of full scale.
Normal or fail-safe operation.

RELAY INDICATORS:

DOE-601 SENSOR

MODEL DOCN600 ADDITIONAL FEATURES

TEMPERATURE RANGE:

0-40°C (32 to 104°F)

WETTED MATERIALS:
PVC and Teflon F.E.P.

FAILURE ALARM:

5A SPDF relay closes if membrane is punctured. LED
on panel is illuminated

CABLE:

Integral 8 m (26 ft.) Maximum distance to analyzer
300 m (1000 ft.)

REPLACEMENT CARTRIDGE:
Part No. DOE-601-SC. Hermetically sealed.

MOUNTING HARDWARE

FLOTATION MOUNTING:

Model DOE-600-BFMK consists of ball float, extension
pipe, swivel bracket, junction box and 50 feet of
interconnect cable

SUBMERSION MOUNTING:

Model DOE-600-SMK consists of 5 ft. PVC pipe,
junction box and 50 feet of interconnect cable

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3.0 INSTALLATION

3.1 Location

3.1.1 Locate the instrument within the reach of the cable provided for the DOE-601
sensor.

3.1.2 Select an installation site which is:

• free of mechanical vibrations

• reasonably clean and dry

• protected from falling corrosive fluids within the ambient temperature and humidity

specifications

• remote from high voltage relay and power switches

3.2 Type of Mounting

3.2.1 If the instrument is to be pipe or panel mounted a special hardware kit will be
required. For panel mount order part number DOCN600-PM. For pipe mount order
part number DOCN600-PIPE. Instructions for both types of mounting will be
included with the kits.

3.2.2 For surface mounting, four feet brackets, together with fastening screws, are
provided with the instrument. These should be fastened to the back of the
instrument and then it may be screwed or bolted in the selected location.

3.3 Conduit Connections

3.3.1 Four 1/2" conduit holes are provided in the bottom of the enclosure. One of these is
fitted with an approved water tight plug. To maintain NEMA 4 integrity, approved
conduit hubs must be used to connect conduit. The hubs must be connected to the
conduit before being connected to the enclosure. Any unused conduit holes must
be closed with water tight plugs or connectors.

3.3.2 For convenience of internal connections the right conduit hole (viewed from the
front) should be used for power connection; the next hole to the left for relay
outputs; the next hole to the left for analog outputs and finally the fourth hole for
sensor input.

3.4 Electrical Connections

CAUTION: The instrument operates from line voltage. This constitutes a possible shock hazard.

Ensure that line power is removed before attempting connections. Note: A separate
source of line power may have been connected to the floating relay contacts.

3.4.1 To access the terminal strips open the door of the instrument and then unscrew the
captive retaining screw near the upper right hand corner of the panel. Now swing
open the panel to reveal the terminal strip on the power supply circuit board and the
smaller terminal strip on the back of the swing-out board.

Page 4

3.5 Sensor Installation, Flotation Mounting

3.5.1 Refer to diagram below and proceed as follows:

a) Fasten elbow to 90-inch long pipe

NOTE: Thread sealant (Teflon tape) is recommended on all mounting hardware

and sensor threads to avoid leaks

b) Fasten adapter pipe with union to elbow

c) Insert adapter pipe with union into flotation ball and tighten union lock ring to

secure float assembly

Page 5

d) The sensor may be attached to float assembly in one of two ways:

1. With sensor EXTENDED FROM BOTTOM of flotation ball:

Insert 12-inch long extender pipe into the flotation ball and fasten it to the
end of adapter pipe. This will extend the sensor’s membrane 12 inches
below the flotation ball. NOTE: Extender pipe supplied only when ordered.

2. With the sensor membrane FLUSH WITH BOTTOM of flotation ball:

Disregard using extender pipe and proceed with Step e).

e) Route sensor cable through assembled pipe sections, starting from bottom

section, and fasten sensor to pipe.

CAUTION: Do not remove measuring cell cartridge from hermetically sealed

package until it is to be used in step f). (Membrane will dry out and
damage measuring cell).

f) Install measuring cell cartridge. Unfasten union nut from sensor and make sure

to remove any moisture from cavity area and brass contact strips. Insert
cartridge in its correctly “keyed” position. Fasten union not tightly so that O-ring
compresses to create an effective water-tight seal.

g) Calibrate system in accordance with the procedure described in Section 5.3

before placing sensor into operation.

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