Cole Parmer pH 550 User manual

OPERATION MANUAL
pH 550 (Cat. No. 0580218)
MICROCOMPUTER BASED
pH /Te perature
CONTROLLER
625 East Bunker CT
Vernon Hills, IL 60061-1844
Phone: [phone]
Fax: [phone]
E- ail: info@colepar er.co
www.colepar er.co
06/0012Rel1

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CONTENTS Page
I. INITIAL INSPECTION 3
MOUNTING PROCEDURE 3
II. GENERAL INTRODUCTION 4
III. USING THE pH 550 5
A. FRONT(KEYPAD) PANEL 5
B. MAIN DISPLAY MODE 6
C. REAR CONNECTORS 7
D. TURNING ON/OFF THE INSTRUMENT 9
IV. MODEL MODES 10
A. MAIN DISPLAY MODE 10
B. CALIBRATION/SETTING MODE 10
How to use the keys 11
a. CHECK PASSWORD page 12
b. USER SETTING page 12
c. pH CALIBRATION page 13
Step by step pH Calibration 14
d. pH CONTROL SETTING page 15
e. pH CURRENT SETTING page 16
f. TEMP. CURRENT SETTING page 16
g. TEMP. CONTROL SETTING page 17
V. CONTROLLING THE RELAYS 18
A. ISOLATION VOLTAGE 18
B. OUTPUT LOAD 18
C. RELAY ACTION,SET POINT &HYSTERESIS 18
D. pH RELAYS 19
E. TEMPERATURE RELAY 20
VI. 4-20 mA OUTPUT 20
A. ISOLATION VOLTAGE 20
B. OUTPUT LOAD 20
C. pH & TEMP LINEAR OUTPUT 20
D. pH ANTILOG OUTPUT 21
VII. RS485 INTERFACE OPERATION 22
A. INTRODUCTTION 22
B. PREPARING THE METER 22
VIII.ERROR DISPLAYS AND TROUBLESHOOTING 23
IX. pH BUFFERS 24
X. SPECIFICATIONS 25

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I. INITIAL INSPECTION
Carefully unpack the instru ent and accessories. Inspect for
da ages ade in ship ent. If any da age is found, notify your
Cole-Par er representative i ediately. All packing aterials
should be saved until satisfactory operation is confir ed.
MOUNTING PROCEDURE
1. Make a cutout
on any panel, with
a thickness of 1/16
in. (1.5 ) to 3/8
in. (9.5 ).
2. Re ove the
ounting
asse bly fro
the controller
and insert the
controller into
the cutout.
3. Replace the
ounting
bracket asse bly onto the controller and secure the controller to
the ounting panel.
Warning :
If the equip ent is used in a anner not specified by the
anufacturer, the protection provided by the equip ent ay be
i paired.
Cleaning the instr ment :
3.66"
0.04
0.00
93.00mm▒
1.00
0.00 93.00mm▒
3.66"
0.00
0.00
1.00
0.04
0.04"R(1.0mm) MAX.
PANEL CUTOUT DIMENSIONS

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1. Be sure to re ove the power before atte pting to clean the
eter.
2. Use a lint free cloth and clean water or neutral detergent.
3. Wipe the outer surface of the instru ent only.
4. Wipe dry the instru ent before power again.
II. GENERAL INTRODUCTION
The Cole-Par er pH 550 (pH and Te perature) Syste is a rugged
icroprocessor based instru ent asse bled in a watertight ¼ DIN
case, designed for use in laboratories and process control
applications.
The pH 550 icroprocessor allows the user to easily recalibrate the
para eters for the probes. The icroprocessor also perfor s a self-
diagnostic routine every ti e you turn on the unit providing you
with basic infor ation about the stability of the instru ent.
The syste si ultaneously displays pH, Te perature, Alar status
and current output in one LCD graphic screen. The LCD also
includes a backlight for dark environ ents. This syste uses glass
electrode for the pH and a precise ther istor for te perature
providing you with accurate readings for all your easure ents.
The pH 550 is equipped with three progra able high or low
relays for pH and one progra able high or low relay for
te perature; all relays are hysteresis driven. The syste also has
two isolated 4-20mA analog output, offset and span configurable
for the pH & te perature display.
The pH 550 co es with a RS485 interface that can easily let the user
log all data with an IBM
©
PC/AT co patible co puter.

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III. USING THE pH 550
A. FRONT PANEL
NEED to crop o t Jenco and Model no from pict re below.
1. The [MODE /-] key.
1a. In Main
Display mode this key
has no function.
1b. In
Calibration/Setting
ode this key will
ove to the next
digit of the current
active para eter.
1c. In
Calibration/Setting
ode, pressing this
key for two seconds
will ove you back to the previous para eter.
2. The [CAL / VIEW] key.
2a. Pressing this key for about two seconds, during ain
display ode will switch to Calibration/Setting ode.
2b. During Calibration/Setting ode this key will switch to
the next available Calibration/Setting page. Pressing this key
at the last User/Calibration page will return the user to the
ain display ode.
3. The [  ] UP key.
During Calibration/Setting ode this key will increment the
current blinking digit of the active para eter.
4. The [
 /pH-Recal.] DOWN/pH Recalibrate key.

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4a. During Calibration/Setting ode this key will decrement
the blinking digit of the active para eter.
4b. During pH calibration, instead of SAVING the new pH
Stand or Slope you can press this key to recalibrate the buffer
again.
5. The [ ↵ ] ENTER key.
During Calibration/Setting ode, this key will save the
current odified para eter and ove to the next para eter.
6. The [ ] LIGHT key.
This key will turn on or turn off the backlight of the LCD.
The backlight will auto atically turn off if there is no key
activity within two inutes.
7. LCD screen.
B. MAIN DISPLAY MODE
1. pH mA OUT - this will
display the output of the pH 4-
20 A circuit.
2. TEMP mA OUT - this will
display the output of the
Te perature 4-20 A circuit.
These two current outputs at
power on will show “OFF” for
about three seconds before going
to ain display ode. After exiting the Calibration /Setting pages a
“FROZEN” essage will be displayed for about 3 seconds if the
unit is not password locked.
3. annunciator - This will be displayed if Calibration
/Setting pages are password locked eaning the user
can’t calibrate or change the settings unless the correct 4 digit
nu ber has been entered, but user still can view all the settings.

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4.H1 (High action relay 1) or L1 (Low action relay 1) annunciator -
this is the status of the pH Relay 1, if this is displayed then the
Relay is ON. H1 eans the relay action is HIGH while L1 eans
the relay action LOW.
5. H2 (High action relay 2) or L2 (Low action relay 2)annunciator –
function is sa e with RELAY 1.
6. H3 (High action relay 3) or L3 (Low action relay 3)annunciator –
function is sa e with RELAY 1.
7. H4 (High action relay 4) or L4 (Low action relay 4)annunciator –
this is the status of the Te perature Relay 4, if this is displayed
then the Relay is ON. H4 eans the relay action is HIGH while L4
eans the relay action LOW.
8. pH Display.
9. Temperat re Display.
C. REAR CONNECTORS
Before wiring the probes, relays, analog output, RS485 and power
cord be sure that you are connecting to the right ter inal as shown
below. Re e ber that the unit is ON once the user plugs in the
power cord to an AC power supply.

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1. Connect the AC line to the rear of the instru ent. The odel
550 can be used with 115 or 230VAC 50/60 Hz. Power
consu ption 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 s re that the
load does not exceed the relay rating, 5 Amp at 115VAC and 2.5
Amp at 230 VAC.
3. Set the proper load to the 4-20 A output connector. Make sure
that the load i pedance is less than 500 Oh s.
4. A +5VDC and -5VDC ( ax 20 A for each) output to provide
excitation voltage for pH pre-a plifier.
CAUTION:
MAKE SURE YOU CONNECT THE AC POWER CORD TO
THE CORRECT AC TERMINALS. CONNECTING INCORRECTLY
MAY DAMAGE THE UNIT PERMANENTLY.
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 perfor so e basic self-
diagnostics and will display

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“OK” or “BAD”. If you received any “BAD” essages turn OFF
the unit and turn it ON again. (See VIII. ERROR DISPLAYS AND
TROUBLESHOOTING).
If the essage persists then you ight need to call our Applications
depart ent.
After the self-diagnostic is co plete the te perature will be
displayed on the lower part of the LCD screen and you are ready to
ake pH calibration or easure ents. Just i erse the probes
halfway to the buffer or liquid. If possible do not allow the probes
to touch any solid object in the buffer or solution. There should be
no air bubbles around the probes either. Shaking or oving the
probes vigorously before recording any easure ent will dislodge
any bubbles for ed in the probes.
IV. MODEL pH 550 MODES
A. MAIN DISPLAY MODE
Turning ON the unit will
always start in ain display
ode.
This instru ent is designed
to provide two distinct
easure ents:

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1. Temperat re - current te perature of the solution.
2. pH - the current degree
of acidity or alkalinity of the
solution with auto atic te perature co pensation.
B. CALIBRATION/SETTING MODE
Pressing the [CAL/VIEW] key for about two seconds during ain
display ode will bring-up the first page of seven pages of the
Calibration/Setting ode. Pressing [CAL/VIEW] key will switch to
the next page until the last page, where pressing [CAL/VIEW] again
will return the user to ain display ode.
Upper drawing is a si ple flowchart showing the path of the
[CAL/VIEW] k