Aquametrix 2200C User Manual
OPERATING INSTRUCTION MANUAL
MODEL 2200C
CONDUCTIVITY ANALYZER
N116-9 REV. 8.0
Water Analytics, Inc.
100 School Street
Andover, MA 01810
(978) 749-9949
(855) 747-7623
Fax (978) 749-9961
www.Wateranalytics.net
TABLE OF CONTENTS
SECTION DESCRIPTION PAGE
1 GENERAL INFORMATION 1
2 SPECIFICATIONS 2
3 INSTALLATION 3
4 DESCRIPTION OF FUNCTIONS 6
5 START-UP AND OPERATION 11
6 OPERATING HINTS 16
7 UTILITY MENU 17
8 DIAGNOSTICS 21
9 TROUBLESHOOTING AND SERVICE 22
Model 2200C Page 1
MODEL 2200C CONDUCTIVITY CONTROLLER
INSTRUCTION MANUAL
1.0 GENERAL INFORMATION
The AquaMetrix Model 2200C conductivity analyzer is a versatile industrial microprocessor based
instrument. Setpoints and outputs are programmed through the menu with push buttons on the face
of the instrument. Calibration is achieved from the front panel menu. The instrument may be used
in conjunction with any AquaMetrix MS series cell.
The instrument provides non-isolated 0-5 Vdc, 0-1 mA and isolated 4-20 mA analog outputs. The
analog output may be programmed to represent any segment of the measuring scale. One control
relay, with fully adjustable deadband, and one high-low alarm relay are provided. The control relay
can be programmed to activate in response to rising or falling conductivity.
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.
2.0 SPECIFICATIONS
DISPLAY:
4 digit LED, 1/2" high digits
MEASURING RANGES:
Eighteen ranges;
The range is set at the factory as ordered, but maybe
changed in the field to any other range through the
Utility Menu.
Temperature: 0°C to 100°C (32°F to 212°F)
POWER REQUIREMENTS:
Standard: 98-132 Vac, 50/60 Hz (less than 5 VA)
Optional: 196-264 Vac, 50/60 Hz (less than 5 VA)
23-26Vdc (nominal current 150mA)
AMBIENT CONDITIONS:
-30 to 50°C (-22 to 122°F)
0 to 90% R.H. non-condensing
CONTROL RELAY:
5A 115/230 Vac, 5A 30 Vdc SPDT
Selectable to activate in response to rising or falling
process
Fully adjustable setpoint and deadband
Manual Override Auto / Off / On
Cycling Feature: On time 0-600sec Off time 0-600sec
Normal or Fail Safe operation
ALARM RELAY:
5A 115/230 Vac, 5A 30 Vdc SPDT
Programmable to activate at high and low alarm
setpoints
Deadband fixed at 2% of Full Scale
Normal or Fail Safe Operation
RELAY INDICATORS:
Three individual LED indicate status of the control
relay and the alarm relay.
ANALOG OUTPUTS:
Non Isolated 0-1mA, 100 ohms maximum load
Non Isolated 0-5Vdc, 1000 ohms minimum load
Isolated 4-20mA, 800 ohms maximum load
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 the process temperature or
conductivity.
TEMPERATURE COMPENSATION:
Automatic 0°C to 100°C (32°F to 212°F)
SYSTEM ERROR:
A LED indicates a system error. The alarm relay can
be programmed to activate upon system memory loss.
DIAGNOSTICS:
Invalid entries are identified by respective flashing
LEDs. When a system error is indicated, use the CALL
button to display STATUS, to determine the status
code.
TEST:
Display value and analog outputs can be set manually
to any value for testing and diagnostic purposes. This
feature allows the operation of the control relay, alarm
relay, analog outputs to be tested independently of the
process.
SAFETY AND SECURITY:
Non-volatile memory (EPROM)
Password protected if enabled
Watch-dog timer monitors microprocessor
Instrument automatically returns to on line operation if
accidentally left in menu mode. (This feature may be
field disabled if desired.)
SENSITIVITY: 0.1% of span
STABILITY: 0.1% of span per 24 hrs. non-cumulative.
NON-LINEARITY: 0.1% of span
REPEATABILITY: 0.1% of span or better
TEMPERATURE DRIFT:
Zero: 0.01% of span per °C
Span: 0.01% of span per °C
RESPONSE TIME:
0.5 second to 90% of value upon step change
ENCLOSURE:
NEMA 4X molded fiberglass reinforced polyester
enclosure with four 1/2" conduit holes and mounting
feet for surface mount. A NEMA 4 plug is provided for
one hole.
MOUNTING CONFIGURATIONS:
Standard is surface mount
Optional panel mount hardware Part No. C35-68
Optional pipe mount hardware Part No. C35-69
NET WEIGHT: 3 1/2 lb. (1.6 kg)
Approvals: CSA
3.0 INSTALLIATION
3.1 Location
3.1.1 Locate the instrument within 3000 feet of where the AquaMetrix MS or MC
conductivity cell is installed.
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 main circuit board.
3.4.2 The terminal strip on the power supply board at the back of the instrument is
labeled for line power, relay outputs and analog outputs. Connect the wiring in
accordance with this labeling. (Refer to Fig.1)
Note: Control Relay B is not used in the 2200C.
Terminals 4 and 5 are wired directly to the input line voltage. These terminals can
be used to supply power to the relays. Use the common ground of Terminal 1 as
the ground for the auxiliary devices. A separate source of power can also be used
to provide power to the relays. Ensure that the circuit breaker supplying the
instrument is able to supply enough current to the auxiliary devices, to ensure
proper operation of the instrument.
CAUTION: Connecting the line voltage to incorrect terminals may cause serious damage.
3.5 Cell Connections
3.5.1 Connect the 4 wires of the cell cable to the TB2 terminal strip on the main circuit
board being sure to match the colors as printed on the TB2 terminal strip. White
and black are the electrode wires; red and green are the temperature sensor wires.
Place switches S41 and S42 in the down “on-line” position. Refer to Fig.2
3.5.2 The test resistor R68, is used for the simulation feature. It has a resistance equal to
the equivalent resistance of the cell at mid scale. The resistor that is shipped with
the unit corresponds to the mid scale of the range ordered. If the range is changed,
from the range configured at the factory. Refer to Sec. 9.1.5 for the correct resistor
value.
4.0 Description of Functions
4.1 Overview
4.1.1 The Model 2200C is a microprocessor based conductivity analyzer designed for
industrial applications. It is compatible with AquaMetrixʼs MS and MC conductivity
cells and offers several measurement ranges. The unit's software makes
maintenance and operation easy.
4.1.2 The outputs include voltage-free relay contacts and industry standard analog
transmission signals. Two programmable relays are provided for process control
and alarm. The status of each relay is indicated on the front by a LED. The analog
output signals transmit low power signals to peripherals such as data recorders or
control systems.
4.1.3 The software is designed for ease of operation. It uses a simple menu with all items
indicated on the panel. The user interface consists of six buttons on the front panel.
The buttons are scanned and responded continuously. In addition, an extensive
system checking for values and parameters is performed by the software. All of the
operating parameters are stored in non-volatile memory, without the need of a
battery.
4.1.4 The Model 2200C operates like a normal analog converter with a number of
additional functions made possible by the microprocessor in the instrument.
Some of these are:
• Recall and easy adjustment of relay and output parameters
• Push button calibration
• A HOLD function for outputs
• Continuous sensor check during measurement
• Continuous self check and watch-dog timer to ensure correct operation
• Password protection of stored values
• Temperature Output
4.2 Calibration
4.2.1 All conductivity systems need to be calibrated when first placed in service and
thereafter from time to time. The frequency of calibration can only be found by the
operator’s experience with each process. Calibration must always be performed
when a new sensor is placed in service.
4.2.2 Calibration is accomplished by using buffer solutions, of known conductivity, and
adjusting the instrument to show the known value. Buffers are available in 500 mL
bottles and in 20 L packs from Water Analytics. The procedure for performing
calibration is very simple and is given in Sections 5.2.
4.3 Temperature Compensation
4.3.1 Temperature compensation is an essential component of conductivity
measuring instruments. Specific conductivity increases with temperature even
though there has been no addition of dissolved solids. It is therefore the industry
standard to compensate for temperature change as if the temperature were
constant at 25°C. The 2200C compensates for a 2% increase in specific
conductivity per °C.
4.4 Relay Outputs
4.4.1 Two SPDT (Single Pole Double Throw) relays are provided. The normally open
contacts, NO, are open when no alarm or control is active.
4.4.2 The control relay can be programmed to close on either rising or falling conductivity.
It is normally used to control a valve, pump or auxiliary device. It may be set to
close at any point on the scale. The deadband, sometimes termed hysteresis,
defines the point at which the relays open.
4.4.3 Refer to Sections 5.4, to 5.6.
4.4.4 The second relay functions as a high-low alarm. It has two programmable
Setpoints (high and low). The deadband is fixed at 2% of full span. The alarm
contact can be programmed to also signal memory loss in the controller. See
Sections 4.7, 5.7, and 5.8.
4.4.5 All relays can be programmed for "fail-safe" operation which reverses the normal
operation of the relay. In fail safe mode the Normally Closed contact functions as
the Normally Open contact. In the event of power loss to the unit, the relay will deenergize and the device connected to the Normally Closed contact will be turned
on. This option is selected with the DIP switches on the swing out board. See
Section 4.7.
4.5 Analog Outputs
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