Aquametrix 2200D User Manual

OPERATING INSTRUCTION MANUAL

MODEL 2200D/P91

DISSOLVED OXYGEN SYSTEM

REV. 8.0

Water Analytics, Inc.
100 School Street
Andover, MA 01810

978-749-9949

Toll free: 855-747-7623 (855-pHProbe)

Fax: [phone]

www.WaterAnalytics.net

TABLE OF CONTENTS

GENERAL INFORMATION 1

SPECIFICATIONS 2

INSTALLATION 4

DESCRIPTION OF FUNCTIONS 8

START-UP AND OPERATION 12

OPERATING HINTS 17

UTILITY MENU 18

DIAGNOSTICS 20

TROUBLESHOOTING AND SERVICE 21

Model 2200D/P91 Page 1

MODEL 2200D DISSOLVED OXYGEN ANALYZERS

AND MODEL P91 DISSOLVED OXYGEN SENSOR

INSTRUCTION MANUAL

1.0 GENERAL INFORMATION

The AquaMetrix Model 2200D 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 AquaMetrix Model P91 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.

Model 2200D/P91 Page 2

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 erros 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 fibreglass 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. 35-68
Optional pipe mount hardware. Part No. 35-69

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

MODEL 2200D-X-2-X ADDITIONAL

FEATURES

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.

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

RELAY INDICATORS:

Three LEDs indicate status or the three
relays

P91 SENSOR

Model 2200D/P91 Page 3

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. P91-D. Hermetically sealed.

MOUNTING HARDWARE

FLOTATION MOUNTING:

Model MHBF consists of ball float, extension pipe, swivel
bracket, junction box and 50 feet of interconnect cable

SUBMERSION MOUNTING:

Model MHDS consists of 5 ft. PVC pipe, junction box and 50 feet
of interconnect cable

FLOW-THROUGH ASSEMBLY:
Model MHFT. Pipe connections are 2” NPT

Model 2200D/P91 Page 4

3.0 INSTALLATION

3.1 Location

3.1.1 Locate the instrument within the reach of the cable provided for the P91 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 C35-68. For pipe mount order part
number C35-69. 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.

Model 2200D/P91 Page 5

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

Model 2200D/P91 Page 6

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 sensorʼs 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.

h) Install pivot mounting bracket and mount junction box on the bracket. Insert

pipe/sensor assembly through the bracket to the desired position. Tighten pipe
locking screw.

3.6 Sensor Installation, Submersion Mounting

3.6.1 a) Refer to diagram below and proceed as follows: