Cole-Parmer Cond 500 Instruction Manual

Operating Instructions

Cole-Parmer CON 500

Conductivity/TDS/Temperature Controller

Cole-Parmer Instrument Company

625 East Bunker Court, Vernon Hills, Illinois 60061
Tel: [phone] or Toll-free: 1-800-323-4340

Fax: [phone]
www.coleparmer.com

CONTENTS page
I. INITIAL INSPECTION AND ASSEMBLY 2
II. GENERAL INTRODUCTION 3
III. USING THE CON 500 4
A.FRONT PANEL 4
B.NORMAL MODE DISPLAY 5
C.REAR CONNECTORS 7
D.TURNING ON/OFF THE INSTRUMENT 8
IV. MODEL CON 500 MODES 9

A. MAIN DISPLAY MODE 9
B. CALIBRATION/SETTING MODE 11

a.PASSWORD CHECK PAGE 12
b.USER SETTING PAGE 12
c.CONDUCTIVITY CALIBRATION PAGE 13
d.CONDUCTIVITY CONTROL SETTING PAGE 16
e.CURRENT SETTING PAGE 17
f.TEMP. CONTROL SETTING PAGE 17

V. CONTROLLING THE RELAYS 18

A. RELAY ISOLATION VOLTAGE 18
B. RELAY OUTPUT LOAD 18
C. RELAY ACTION, SETPOINT, HYSTERESIS

MODE &HYSTERESIS VALUE 18
D. CONDUCTIVITY/TDS RELAYS 19
E. TEMPERATURE RELAY 19
VI. 4-20 mA OUTPUT 20
A. ISOLATION VOLTAGE 20
B. OUTPUT LOAD 20
C. CONDUCTIVITY OR TDS LINEAR CURRENT

OUTPUT 20
VII. RS485 INTERFACE OPERATION 21
A. INTRODUCTION 21
B. PREPARING THE METER 21
VIII.ERROR DISPLAYS AND TROUBLESHOOTING 22
IX. SPECIFICATION 23
X. WARRANTY 24
XI. RETURN OF ITEMS 24

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I. INITIAL INSPECTION AND ASSEMBLY

Carefully unpack the instrument and accessories. Inspect for damages made in
shipment. If any damage is found, notify your Cole-Parmer representative
immediately. All packing materials should be saved until satisfactory operation is
confirmed.

MOUNTING PROCEDURE

1. Make a cutout on any panel, with a thickness of 1/16 in. (1.5 mm)

to 3/8 in. (9.5mm).

2. Remove the mounting assembly from the controller and insert the

controller into the cutout.

3. Replace the mounting bracket assembly onto the controller and

secure the controller to the mounting panel.

PANEL CUTOUT DIMENSIONS

0.04"R(1.0mm) MAX.

0.04

3.66"

93.00mm?

0.00

1.00

0.00

3.66"

93.00mm?

0.04

0.00

1.00

0.00

Warning:

If the equipment is used in a manner not specified by the manufacturer, the
protection provided by the equipment may be impaired.

2

Cleaning the instrument:

1. Be sure to remove the power before attempting to clean the meter.

2. Use a lint free cloth and clean water or neutral detergent.

3. Wipe the outer surface of the instrument only.

4. Wipe-dry the instrument before powering again.

II. GENERAL INTRODUCTION

The Cole-Parmer CON 500 (Conductivity and Temperature) System, is a rugged
microprocessor based instrument assembled in a watertight ¼ DIN case,
designed for use in laboratories and process control applications.

The model CON 500 microprocessor allows the user to easily recalibrate the
parameters for the probes. The Conductivity system requires only a single
calibration. The microprocessor also performs a self-diagnostic routine every time
you turn on the unit providing you with basic information about the stability of the
instrument.

The system simultaneously displays Conductivity, Temperature, relay status and
mA output in one LCD graphic screen. This system uses a two-wire or four-wire
type sensor for the conductivity and a precise thermistor for temperature,
providing you with accurate readings for all your measurements.

The model CON 500 is equipped with three relays: two programmable High/Low
control relays for conductivity/TDS and one programmable High/Low control relay
for temperature. All relays are hysteresis driven and configurable to CENTER or
EDGE mode. The system also has an isolated 4-20mA analog output, offset and
span configurable for Conductivity/TDS display.

The model CON 500 comes with a RS485 interface which can easily let the user
log all data with an IBM© PC/AT compatible computer.

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III. USING THE CON 500

A. FRONT PANEL

1. The [MODE/-] key.

1a. In Normal mode, pressing this Key will change the display to Conductivity or
TDS.

1b. In Calibration/Setting mode, pressing this key will move to the next digit of
the current active parameter.

1c. In Calibration/Setting mode, pressing this key for 2 seconds will move you
back to the previous parameter. Pressing this key for 2 seconds at the first
parameter of the page will move you back to last parameter of the previous page.

2. The [CAL/VIEW] key.

2a. During any normal mode, pressing this key will switch to first
Calibration/Setting screen.

2b. During Calibration/Setting mode, pressing this key will switch to the next
available Calibration/Setting page. Pressing this key at the last User/Calibration
page (TEMP. CONTROL SETTING page) will return the user to the Normal
mode.

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3. The [] UP key.

456

During Calibration/Setting mode, pressing this key will increment the current
blinking digit of the active parameter.



4. The [] DOWN key.

During Calibration/Setting mode, pressing this key will decrement the blinking
digit of the active parameter.

5. The [] ENTER key.

During Calibration/Setting mode, pressing this key will save the current modified
parameter and move to the next parameter on the page. If the parameter is the
last one on the page then it will move to the first parameter on the next available
page.

6. The [ ] LIGHT key.

Pressing this key will turn on or turn off the backlight of the LCD. The backlight
will automatically turn off if there is no key activity within two minutes.

7. LCD screen.

B. NORMAL MODE DISPLAY

1

2

7

8

3

9

1. CELL – actual cell constant of the probe computed from the last cell constant
calibration. In TDS display it will show the TDS factor instead of the cell constant.

5

2. CURRENT OUT - this will display the actual output of the isolated 4-20 mA
output. At POWER-ON this will show “OFF” for about 3 seconds before going to

normal operation. After going to the Calibration/Setting pages when the unit is not
password locked this will show ”FROZEN” for about 3 seconds before returning to
normal operation.

3. ( ) key icon annunciator - this will be displayed if the Calibration /Setting
pages are locked, meaning the user will not be able to change the values unless

the correct 4 digit number has been entered at the PASSWORD CHECK page.

4. H1 or L1 annunciator -

displayed then the relay is ON. (H stands for high action control and L stands for
low action control)

this is the status of Conductivity/TDS Relay 1, if this is

5. H2 or L2 annunciator – this is the status of Conductivity/TDS Relay 2, if this is
displayed then the relay is ON.

6. H3 or L3 annunciator – this is the status of the Temperature Relay 3, if this is
displayed then the Relay is ON.

7. TC- user selected temperature coefficient of the conductivity/ TDS solution.

8. Conductivity or TDS display.

9. Temperature display.

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C. REAR CONNECTORS

Before wiring the probes, relays, analog output, RS485 and the power cord, be
sure that you are connecting to the right terminal as shown above (be sure the
ac-plug is not plugged-in). Remember that the unit is ON once the user plugs in
the power cord to an AC power supply.

1. Connect the AC line to the rear of the instrument. The model can be used with
115 or 230 VAC 50/60 Hz. Power consumption is 6 watts. Make sure the
EARTH connector is connected to the earth lead of the AC power line.

2. Connect the proper load to the output relays. Make sure that the load does
not exceed the relay rating, 5 Amp at 115 VAC and 2.5 Amp at 230 VAC.

3. Set the proper load to the 4-20mA output connector. Make sure that the load
impedance is less than 500 Ohms.

4. If the user uses a two-wire conductivity probe, the user needs to short terminal
D1 with terminal S1 and terminal D2 with terminal S2.

CAUTION: Make sure you connect the AC power cord to the correct AC

terminals. Connecting incorrectly may damage the unit permanently.

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D. TURNING ON/OFF THE INSTRUMENT

By just plugging the unit to a correct AC
voltage, the unit will be ready for use.
There is no Power key so unplugging
and plugging the unit will turn OFF or
turn ON the unit respectively.
After the unit is turned on, it will perform
some basic self diagnostics and will
display “OK” or “BAD”. If you received
any “BAD” messages, turn OFF the unit
and turn it ON again.
(see VIII. ERROR DISPLAYS AND

TROUBLESHOOTING).
If the message persists, then you might need to call our Applications Specialists.
After the self-diagnostic is complete, the temperature will be displayed on the

lowest part of the screen and you are ready to make conductivity or TDS
measurements. Just immerse the probes halfway to the liquid. If possible do not
allow the probes to touch any solid object in the solution. There should be no air
bubbles around the probes either. Shaking or moving the probes vigorously
before recording any measurement will dislodge any bubbles formed in the
probes.

PROBE HANDLING AND MAINTENANCE

REMINDER: If the user uses a two-wire conductivity probe, the user needs to

short terminal D1 with terminal S1 and terminal D2 with terminal S2.

Handling the probe

To ensure accurate and repeatable results:

1. The probe (cell) must be clean before making any measurements. If measuring
low conductivity solutions, extraordinary cleanliness may be necessary.

2. The probe cell plates must be totally submerged in the solution. The electrode
chamber must be free of trapped air or particulates. You may need to tap the
probe gently to dislodge any air bubbles.

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