Myron L CTCIITD User Manual

CTCII

Water Quality Instrumentation

Accuracy • Reliability • Simplicity

CONDUCTIVITY/TDS

Chemical Treatment Controller

(Cooling Tower Controller)

Operation

Manual

14 JANUARY 05

INSTALLATION • OPERATION • MAINTENANCE

Controller Only: CTCII, & CTCIIT

Monitor/controller: CTCIID, & CTCIITD

ACCURACY • RELIABILITY • SIMPLICITY

ELECTRONIC CALIBRATION (CIRCUIT ONLY) -

CTCII MAIN CIRCUIT BOARD

Figure V.A.1

115/230 VAC
SELECT SWITCH

100mA Slow Blow (T.10A)
115 & 230 VAC (V~)

Wickman Fuse 5 Amp
(#3741500041 or equiv)
115 VAC(V~)

SCALE SELECT

ELECTRONIC
CALIBRATION

MAIN
CALIBRATION
CONTROL

DISPLAY
CALIBRATION
CONTROL
(FACTORY SET)

OPTIONAL
LIMIT
TIMER
CONTROL
MODULE

OPTIONAL
4-20 mA
OUTPUT
MODULE

DIS

CAL

TDS COND

EC

CTCII

DISPLAY

TRANSFORMER

Yel

CAP CAP

C4AM

LTM

HYST

Flow Switch
Jumper ­Remove if
flow switch
installed.

SWITCH

FUSE

RELAY RELAY

BLEED FEED

FEED
PUMP

BLEED
VALVE

POWER

FLOW
SWITCH

SENSOR 0-10VDC

FS BK WTRD GN NU R- R+PWR C GDPWR C GDPWR C GD

SET POINT
HYSTERESIS
RIGHT INC
LEFT DEC

a. Set Point Control Calibration

1. Ensure power is OFF.

2. Using a standard slot screwdriver remove the four (4)
screws on the clear cover and remove cover.

3. The front panel is held in place with hook & loop strips
on each side. By carefully lifting at the slot on the top,
the front panel will pull toward you. Do not pull more than
about 8 inches/20CM.

DO NOT pull on control knob(s).

4. Rotate the front panel down so that the back side is
facing you. The Circuit Board is mounted to the back of
the front panel.

5. Turn power ON.

Caution: When handling CB, DO NOT touch component side.

Electrical shock may occur.

6. Press and hold the EC switch.

7. Rotate Set Point control from “0” toward EC. At EC the
relay should click, and the LED should change from RED
to GREEN. If not, set Set Point control to EC and adjust
the CALibration control.
Models with 3 1/2 digit LCD.
The display should indicate 2.50.
If not, adjust the DISplay calibration control.

8. Turn power OFF.

9. Re-install front panel and cover as described in

USING STANDARD SOLUTIONS - Section V.B.2.

The BEST method of verifying and recalibrating your CTCII

“REASSEMBLY”.

10. To operate, turn power ON.

b. 0-10VDC Recorder Output Calibration

Chemical Treatment Controller is with NIST traceable Standard
Solution (available from the Myron L Company). Because it
includes the sensor, the entire system is calibrated.

See section V.B.1.

See Section V.B.1.

The following procedure describes the easiest method for
standard solution calibration. We recommended using Myron L
442-3000 Standard Solution or equivalent. This standard solution
will calibrate either Conductivity µS (at 3900 µS) or TDS ppm (at
3000 ppm).

1. Rinse thoroughly, and ll a clean glass beaker with
standard solution.

2. Place sensor in beaker of standard solution. The level of
standard solution must be high enough to cover at least
1/2” above the electrodes.

3. Slowly shake the sensor to remove air bubbles from the
electrodes.

4. Allow 5-10 minutes for temperature to equilibrate. For
the quickest and the best results, both the sensor and
solution should be at the same temperature.

5. Turn power ON.

6. Rotated the Set Point control to 3900 for Conductivity
models or 3000 for TDS models. The relay should click
and the LED will change from GREEN to RED.
If the set point is different, adjust CALibration control
on the main circuit board until the reading matches the
solution.
Models with display (standard 3 1/2 digit).
The display should match the value of the standard
solution, 3900 µS (displayed as 3.90) or 3000 ppm
(displayed as 3.00).
If the reading is different, adjust DISplay calibration
control on the main circuit board until the reading
matches the solution.

7. After adjustment, turn power OFF.

8. Re-install front panel and cover as described below in
“REASSEMBLY”.

9. To operate, turn power ON.

TRANSFER STANDARD METHOD - See Section V.B.3.

CTCII

CHEMICAL TREATMENT CONTROLLER

(COOLING TOWER CONTROLLER)

QUICK REFERENCE GUIDE!

If you read nothing else in this
manual please read this
Quick Reference Guide.

PLEASE READ and COMPREHEND ALL
WARNINGS, CAUTIONS and ADVISEMENTS
CONTAINED WITHIN THIS MANUAL.

Failure to comply is beyond the responsibility of the
Myron L Company.

WARNING: ALL CONTROLLERS ARE FACTORY SET TO
OPERATE ON 115 VAC. BEFORE APPLYING POWER ENSURE
THE INPUT POWER “115/230 VAC” SELECTION IS CORRECT
FOR YOUR REQUIREMENTS. FAILURE TO DO SO IS BEYOND
THE RESPONSIBILITY OF THE MYRON L COMPANY. See
section II.D.1. and gure II.E.1.

WARNING: ENSURE POWER IS OFF WHILE INSTALLING
ELECTRICAL EQUIPMENT. IF MONITOR/CONTROLLER
IS INSTALLED, ENSURE THE POWER IS OFF BEFORE
SERVICING. FAILURE TO DO SO COULD CAUSE DAMAGE
TO THE INSTRUMENT, AND COULD BE HARMFUL OR FATAL
TO PERSONNEL. ONLY QUALIFIED PERSONNEL SHOULD
INSTALL OR SERVICE ELECTRICAL EQUIPMENT.

CAUTIONS: Before installation, ensure you have the correct
model (with options), AND it is scaled for your application.
See sections I.A. & I.B.
Do you have the correct sensor? See section I.E.
Mounting requirements. What is needed? See section II.B.

The following will give the installer and user a quick
overview. See the sections listed for details.

REMOVING FRONT PANEL

1. Using a Phillips Head screwdriver remove the four (4)
screws on the clear cover.

2. Remove clear cover.

3. The front panel is held in place with hook & loop strips
on each side. By carefully lifting at the slot on the top,
the front panel will pull toward you. Do not pull more than
about 8 inches/20CM.

DO NOT pull on control knob(s).

4. Rotate the front panel down so that the back side is
facing you. The Main Circuit Board is mounted to the
back of the front panel.

REASSEMBLY

1. Carefully reinstall the front panel.

2. Reinstall the clear cover.

3. Reinstall the four (4) screws and tighten.

4. If desired, install corner covers.

5. To operate, turn power ON.

INTRODUCTION - Section I.

This section covers the specications of your new CTCII
Chemical Treatment Controller including sensor information.

INSTALLATION - Section II.

This section covers how to install your new CTCII Chemical
Treatment Controller; mechanically and electrically.

OPTIONS & ACCESSORIES - Section III.

This section covers the specications, installation, set up, and
operation of each option.

OPERATING PROCEDURES - Section IV.

This section covers a brief description of different models and
their features; how they work, and how to set them up for your
particular use.

QUICK CHECK-OUT PROCEDURE -

See Section IV.B.1.
It is assumed that the Controller power is ON, that it is connected
to an appropriate sensor, and that the sensor is immersed in water
within the range that the Controller will be required to operate, and
the clear lid is removed from the Controller.

1. Rotate the large Set Point Control knob on the front
panel through its entire range.

2. Verify that the set point indicator light changes from RED
to GREEN and visa versa.

3. Verify that the relay clicks, and controls the bleed valve
and/or chemical feed pump.

4. Adjust the set point control to the desired set point value.

5. Re-install clear cover.

HYSTERESIS (DEAD BAND) ADJUSTMENT -

See Section IV.B.3.

PRIMARY COMPONENT IDENTIFICATION -

Section V.A.

Review the gure on the following page to familiarize yourself with
the Main circuit board assembly. The diagram shows the Limit
Timer and the optional 4-20 mA Output module installed.

QUICK CALIBRATION - Section V.B.

WARNING: When performing calibration procedures, the
technician must take extreme care to avoid contacting the
circuitry other than the CALibration control. Failure to do so
could result in damage to the equipment, property and/or
personal injury.

60

80

100

120

0

1000

2000

3000

4000

5000

40

20

0

MICROSIEMENS / CM

CTCII

EC

MINUTES

CTCII
Basic
Model

1

60

80

100

120

0

1000

2000

3000

4000

5000

40

20

0

MICROSIEMENS / CM

CTCII

EC

MINUTES

CTCII
w/ 3 1/2
Digit LCD

2

60

80

100

120

0

1000

2000

3000

4000

5000

40

20

0

MICROSIEMENS / CM

CTCII

EC

MINUTES

CTCII w/
Feed Pump
Limit Timer

3

60

80

100

120

0

1000

2000

3000

4000

5000

40

20

0

MICROSIEMENS / CM

CTCII

EC

MINUTES

CTCII
w/ 3 1/2
Digit LCD
Feed Pump Limit Timer

4

TABLE OF CONTENTS

SECTION PAGE

CTC Series II ILLUSTRATIONS (CTCII, CTCIID, CTCIIT & CTCIITD)......................................................................1-4

I. INTRODUCTION .................................................................................................................................................................. 7

A. SCOPE................................................................................................................................................................... 7

1. Functional Descriptions ........................................................................................................................... 7

2. Applications.............................................................................................................................................. 7

B. SPECIFICATIONS.................................................................................................................................................. 7

C. OPTIONAL FEATURES..........................................................................................................................................8

D. ACCESSORIES...................................................................................................................................................... 8

E. SENSORS .............................................................................................................................................................. 9

1. Conductivity/TDS ..................................................................................................................................... 9

2. Sensor Specications ..............................................................................................................................9

F. ORDER INFORMATION......................................................................................................................................... 9

1. How to order a CTCII controller .............................................................................................................. 9

2. How to order Sensors .............................................................................................................................. 9

II. INSTALLATION ....................................................................................................................................................................10

A. GENERAL............................................................................................................................................................... 10

B. MECHANICAL INSTALLATION .............................................................................................................................. 10

1. Surface Mounting..................................................................................................................................... 10

C. SENSOR INSERTION / DIP MOUNT ASSEMBLIES ............................................................................................. 11

1. CSAR Insertion Mode Assembly.............................................................................................................. 11

2. CS51R Alternate Dip Sensor Assembly ................................................................................................... 11

D. ELECTRICAL INSTALLATION................................................................................................................................ 11

1. 115/230 VAC Conversion......................................................................................................................... 11

2. Connecting the Sensor Cable.................................................................................................................. 12

a. Modication for US Pharmaceutical 25 (No Temperature Compensation) ......................................... 12

3. Flow Switch.............................................................................................................................................. 12

E. 0-10 VDC OUTPUT ................................................................................................................................................ 13

1. Connection............................................................................................................................................... 13

2. Voltage Divider......................................................................................................................................... 13

F. RESCALE............................................................................................................................................................... 14

III. OPTIONS & ACCESSORIES INSTALLATION.................................................................................................................... 15

A. -LTM (LIMIT TIMER MODULE) ............................................................................................................................. 15

1. Description............................................................................................................................................... 15

2. Installation................................................................................................................................................ 15

a. Hysteresis.......................................................................................................................................................... 15

B. -C4A MODULE (4-20mA OPTION) ........................................................................................................................ 15

1. Description............................................................................................................................................... 15

2. Installation................................................................................................................................................ 16

3. Recalibration............................................................................................................................................ 17

IV. OPERATING PROCEDURES .............................................................................................................................................. 18

A. FRONT PANEL INDICATORS & CONTROLS ....................................................................................................... 18

1. Red LED Indicator ................................................................................................................................... 18

2. Green LED Indicator ................................................................................................................................ 18

3. Set Point Control...................................................................................................................................... 18

4. Digital Display Models.............................................................................................................................. 18

5. Limit Timer Models................................................................................................................................... 18

B. SETUP PROCEDURES......................................................................................................................................... 19

1. Check-Out Procedure .............................................................................................................................. 19

2. Set Point Adjustment ............................................................................................................................... 19

3. Hysteresis (Dead Band) Adjustment........................................................................................................ 19

4. Feed Pump Limit Timer............................................................................................................................ 19

V. COMPONENT IDENTIFICATION, CALIBRATION AND PREVENTIVE CARE...................................................................20

A. PRIMARY COMPONENT IDENTIFICATION ......................................................................................................... 20

B. CALIBRATION PROCEDURES - MAIN CIRCUIT BOARD.................................................................................... 21

1. Electronic Calibration (Circuit Only)......................................................................................................... 21

2. Calibration Using Standard Solution........................................................................................................ 21

3. Transfer Standard Method....................................................................................................................... 22

C. PREVENTIVE CARE.............................................................................................................................................. 22

5

TABLE OF CONTENTS Continued

SECTION PAGE

VI. OPTIONS & ACCESSORIES............................................................................................................................................... 23

A. OPTIONS ORDERED WITH CTCII....................................................................................................................... 23

B. OPTIONS & ACCESSORIES ORDERED SEPARATELY ......................................................................................23

C. STANDARD SOLUTIONS...................................................................................................................................... 24

VII. REPLACEMENT PARTS ..................................................................................................................................................... 25

VIII. WARRANTY......................................................................................................................................................................... 26

IX. GLOSSARY.......................................................................................................................................................................... 27

X. NOTES ................................................................................................................................................................................. 28

XI. ADDENDUM......................................................................................................................................................................... 29

A. CONDUCTIVITY, TDS AND TEMPERATURE RELATIONSHIPS.......................................................................... 29

6

I. INTRODUCTION

Thank you for selecting one of the Myron L Company’s latest
Chemical Treatment Controllers. The CTCII is based on input
from ‘you’ - our customers, time proven designs, and many years
of instrumentation experience.
Since 1957, the Myron L Company has been providing customers
with quality products at an affordable price by designing and
producing products that are Accurate, Reliable, and Simple to use.
Quality you have come to rely and depend on.
As you read through this operation manual you will see the CTCII
is truly designed to be user friendly and simple to install.
The CTCII is packaged as a complete set ready to install which
includes the sensor, input power cord (115VAC) and two (2)
output connectors (115VAC) in a fully waterproof enclosure.

A. SCOPE

This operation manual provides the user with the necessary
information to install, operate and maintain your
Myron L Company CTCII Chemical Treatment Controller.
Section I. Provides Descriptions, Applications, Specications.
Section II. Installation; mounting, wiring and set up.
Section III. Options and Accessory installation procedures.
Section IV. Operating procedures.
Section V. Identies their primary components and provides the

user with easy-to-use calibration and preventive care

procedures.
Section VI. Options & Accessories List.
Section VII. Replacement Components.
Section VIII. Warranty information.
Section IX. Glossary, denitions.
Section X. Notes.
Section XI. Addendum.

1. FUNCTIONAL DESCRIPTIONS

All models feature a water proof & corrosion resistant IP65/NEMA
4X enclosure for bench or surface mounting. The CTCII is a
compact 4.7” (120mm) x 6.3” (160mm).

Bright dual GREEN/RED LED indicates ON/OFF (above or below
set point). All models feature TWO heavy-duty 10 amp output
relays, operating on increasing concentrations.

All models include input power cord* (115 VAC powercord 8 ft.
with USA 3 prong plug - NOT for use with 230 VAC), two (2)
output power connectors, CSAR sensor, and appropriate strain
reliefs.

LED. A 120 minute Limit Timer is provided to stop the feed pump
from continuing to pump chemical(s) in to tower, tank or system. A
bright YELLOW LED indicates when Limit Timer is on.

Model CTCIID Chemical Treatment Controller

0-5000 µS(µM) / ppm TDS 442™ Monitor/controller (value
displayed as X.XX mS(mM) or ppt w/ standard LCD). Front panel
is equipped with a “SET POINT” control, RED/GREEN indicator
LED, and a 3 1/2 digit liquid crystal display (LCD)*.

Model CTCIITD Chemical Treatment Controller

0-5000 µS(µM) / ppm TDS 442™ Monitor/controller (value
displayed as X.XX mS(mM) or ppt w/ standard LCD). Front panel
is equipped with a “SET POINT” control, RED/GREEN indicator
LED, and a 3 1/2 digit liquid crystal display (LCD)*. A 120 minute
Limit Timer is provided to stop the feed pump from continuing to
pump chemical(s) in to tower, tank or system. A bright YELLOW
LED indicates when Limit Timer is on.

* A 35BL (3 1/2 digit) backlit, or a 45BL (4 1/2 digit) backlit
display is available as an option for a full 0-5000 µS(µM) or ppm
displayed value.

2. APPLICATIONS

Chemical Treatment
Cooling Towers
Process Control
Wastewater Treatment
Food Processing
Plating
Power Plants
Laboratories
Printing
Boiler
Agriculture/Aquaculture

Are just a few of the applications

B. SPECIFICATIONS

RANGE:

0-5000 µS(µM) or ppm TDS 442™ (user selectable)

DISPLAY:

Models CTCIID & CTCIITD:

1/2” (13mm) 3 1/2 digit LCD

Displayed value — 0-5.00 mS(mM) or ppt.
NOTE: 3 1/2 digit LCD may be replaced with either a 3 1/2 or a 4
1/2 digit back lit LCD - available as options.

4 1/2 digit displayed value — 0-5000 µS(µM) or ppm.

The CS51R sensor for more demanding applications may be
substituted at an additional cost.

For specic CTCII congurations, reference the following
individual model descriptions.

*NOTE: for 230 VAC or other power requirements the plug must
be cut off or removed and hard wired directly to the source or a
local plug or adapter may be installed.

Model CTCII Chemical Treatment Controller

0-5000 µS(µM) / ppm TDS 442™ Controller. Front panel is
equipped with a “SET POINT” control and RED/GREEN indicator
LED.

Model CTCIIT Chemical Treatment Controller

0-5000 µS(µM) / ppm TDS 442™ Controller. Front panel is
equipped with a “SET POINT” control and RED/GREEN indicator

ACCURACY

All Models: ± 2 % of Full Scale

SENSITIVITY

0.05% of span

STABILITY

0.05% of span

7