Honeywell APT4000PH User Manual

APT4000 Series

4-Wire pH Analyzers

User Manual

70-82-25-103

Revision 2 – 09/03

About This Document

Abstract

This document provides information specific to the APT4000 pH Analyzer.

Contacts

World Wide Web

The following lists Honeywell’s World Wide Web sites that will be of
interest to our customers.

Honeywell Organization WWW Address (URL)
Corporate http://www.honeywell.com
Industrial Measurement and Control http://www.honeywell.com/imc

Telephone

Contact us by telephone at the numbers listed below.

Or

ganization Phone Number

United States and Canada Honeywell 1-800-423-9883 Tech. Support

1-888-423-9883 Q&A Faxback

(TACFACS)

1-800-525-7439 Service

Address

Honeywell Industrial Measurement and Control, 1100 Virginia Drive,
Fort Washington, PA 19034

Warranty/Remedy

Honeywell warrants goods of its manufacture as being free of defective
materials and faulty workmanship. Contact your local sales office for war­ranty information. If warranted goods are returned to Honeywell during
the period of coverage, Honeywell will repair or replace without charge
those items it finds defective. The foregoing is Buyers’ sole remedy and is

in lieu of all other warranties, expressed or implied, includ­ing those of merchantability and fitness for a particular
purpose. Specifications may change without notice.

The information we supply is believed to be accurate and reliable as of this
printing. However, we assume no responsibility for this use.

While we provide application assistance personally, through our literature
and the Honeywell web site, it is up to the customer to determine the
suitability of the product in the application.

Copyright and Notices

© Copyright 2003 by Honeywell

Revision

2 – 09/03

3

Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Overview of APT4000PH . . . . . . . . . . . . . . . . . . . . . . . .7

Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Package contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Mounting plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Pipe mounting, panel mounting . . . . . . . . . . . . . . . . . . . . . . . .10

Installation and connection . . . . . . . . . . . . . . . . . . . .13

Information on installation . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Terminal assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Typical wirings pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Typical wirings ORP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Protective wiring of relay outputs . . . . . . . . . . . . . . . . . . . . . . .20

User interface and display . . . . . . . . . . . . . . . . . . . . . .22

Operation: Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Safety features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Sensocheck, Sensoface sensor monitoring . . . . . . . . . . . . . . . .25

GainCheck device self test . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Automatic device self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Hold mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

To activate the Hold mode from outside . . . . . . . . . . . . . . . . . .27

Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Menu structure of configuration . . . . . . . . . . . . . . . . . . . . . . . .29

Overview of configuration steps . . . . . . . . . . . . . . . . . . . . . . . .30

Output 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Output 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Temperature compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Calibration mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

Alarm settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Limit function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

Control of rinsing probe and calibration probes . . . . . . . . .58

Contents

4

APT4000PH

Parameter set 1/2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

Default settings of parameter sets . . . . . . . . . . . . . . . . . . . . . .61

Parameter set, individual settings . . . . . . . . . . . . . . . . . . . . . . .62

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

pH calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

Zero adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

Automatic calibration with Calimatic . . . . . . . . . . . . . . . . . . . .68

Manual calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

Data entry of premeasured electrodes . . . . . . . . . . . . . . . . . . .72

Product calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

ORP calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

Adjusting temp probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

Diagnostics functions . . . . . . . . . . . . . . . . . . . . . . . . .79

Controller functions . . . . . . . . . . . . . . . . . . . . . . . . . . .82

PID controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82

Pulse length / pulse frequency controller . . . . . . . . . . . . . . . . . .84

Connecting a rinsing system . . . . . . . . . . . . . . . . . . . .85

Operation with automatic cleaning system . . . . . . .85

Error messages (error codes) . . . . . . . . . . . . . . . . . . .86

Calibration error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

Operating states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90

Sensoface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92

Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94

Product line and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . .94

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95

Buffer tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101

Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112

Contents

5

Safety information

Be sure to read and observe the following instruc­tions!

The analyzer has been designed in accordance with the state of
the art and complying with the applicable safety regulations.
When operating the analyzer, certain conditions may neverthe­less lead to danger for the operator or damage to the analyzer.

Caution!

Commissioning may only be carried out by trained experts.
Whenever it is likely that protection has been impaired, the
analyzer shall be made inoperative and secured against unin­tended operation.

The protection is likely to be impaired if, for example:

• the analyzer shows visible damage

• the analyzer fails to perform the intended measurements

• after prolonged storage at temperatures above 70 °C

• after severe transport stresses

Before recommissioning the analyzer, a professional routine test
in accordance with EN 61010-1 must be performed. This test
should be carried out by the manufacturer.

Caution!

Before commissioning it must be proved that the analyzer may
be connected with other equipment.

6

APT4000PH

Intended use

The APT4000PH is used for pH/mV, ORP, and temperature
measurement in industry, environment, food processing and
sewage treatment.
The rugged molded enclosure can be fixed into a control panel
or mounted on a wall or at a post. The protective hood provides
additional protection against direct weather exposure and
mechanical damage.
The analyzer can be easily replaced and it accepts commercially
available electrodes with a nominal zero point at pH 7 and
DURAFET II electrodes.

Trademarks

The following names are registered trademarks. For practical
reasons they are shown without trademark symbol in this
manual.

DURAFET

®

, MEREDIAN®are registered trademarks of

Honeywell Inc., USA

EasyClean

®

is a registered trademark of Mettler Toledo GmbH,

Switzerland.

Sensocheck

®

Sensoface

®

Calimatic

®

GainCheck

®

are registered trademarks of Knick GmbH & Co. KG, Germany.

7

Overview of APT4000PH

1

2

3

E

D

C

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

pH / mV /
temp
input

Hold

input

Control

input

Output 1

Output 2

Alarm

Wash

Power

Glass
electrode

Reference
electrode

Auxiliary
electrode

RTD

RTD

Shield

+ DURAFET II

– DURAFET II

Hold

Hold/
CONTROL

CONTROL

+ Output 1

- Output 1/2

+ Output 2

Relay 1

Relay 1/2

Relay 2

Alarm

Alarm

Wash

Wash

Power

Power

R1

R2

Power supply
for
DURAFET II
electrode

8

APT4000PH

Package contents

Check the shipment for transport damage and completeness.
The package should contain:

• Front unit of APT4000PH

• Lower case

• Bag containing small parts

• Instruction manual

• Specific test report

Assembly

11

10

9

8

76 5

4

1

2

3

6 Sealing inserts (1 piece)
7 Rubber reducer (1 piece)
8 Cable glands (3 pieces)
9 Filler plugs (3 pieces)
10 Hexagon nuts (5 pieces)
11 Sealing plugs (2 pieces),

for sealing in case of wall mounting

1 Jumper (2 pieces)
2 Washer (1 piece),

for conduit mounting: Place washer

between enclosure and nut
3 Cable ties (3 pieces)
4 Hinge pin (1 piece),

insertable from either side
5 Enclosure screws (4 pieces)

Fig. 1: Assembling the enclosure

9

Mounting plan

144

144

15

42

84

80

32

21

43

105

27

72

6,2

12

3

4

1 Cable gland (3 pieces)
2 Breakthroughs for cable gland

or conduit 1/2”,
dia 21.5 mm (2 breakthroughs)
Conduits not included!

3 Breakthroughs for pipe mounting

(4 breakthroughs)

4 Breakthroughs for wall mounting

(2 breakthroughs)

Fig. 2: Mounting plan

All dimensions in mm.

10

APT4000PH

40 60

132

1

2

3
4

5

Fig. 3: 51205988-001 pipe-mount kit

1 512005989-001 protective hood (if required)
2 Hose clamps with worm gear drive to DIN 3017 (2 pieces)
3 Pipe-mount plate (1 piece)
4 For vertical or horizontal posts or pipes
5 Self-tapping screws (4 pieces)

1

132165

173

1

Fig. 4: 51205989-001 protective hood for wall and

pipe mounting

Pipe mounting, panel mounting

All dimensions in mm.

11

1

2

3

45

max. 25

78 27

1...22

1 Screws (4 pieces)
2 Gasket (1 piece)
3 Control panel
4 Span pieces (4 pieces)
5 Threaded sleeves (4 pieces)

Fig. 5: 51205990-001 panel-mount kit

All dimensions in mm.

12

APT4000PH

Installation and connection

Information on installation

Caution!

• The analyzer may only be installed by trained experts

in accordance with this instruction manual
and as per applicable local and national codes.

• Be sure to observe the technical specifications and

input ratings.

• Be sure not to notch the conductor when stripping the

insulation.

• Before connecting the analyzer to the power supply,

make sure that its voltage lies within the range

20.5 to 253 V AC/DC.

• When commissioning, a complete configuration must be

carried out by the system administrator.

The terminals are suitable for single wires and flexible leads up to

2.5 mm

2

(AWG 14).

Terminal assignments

Fig. 6: Terminal assignments APT4000PH

13

1 ESD shield covering the signal inputs (Screw off for assembly)

Note: The cable shield must end under the ESD shield.

(Cut lines if required)

2 Terminals for temperature probe and outer shield
3 Terminals for electrode
4 Connection of power supply

Fig. 7: Information on installation, rear side of analyzer

1

3

2

4

The connections to the analyzer are incendive and
must be installed in accordance with the National
Electric Code (ANSI-NFPA 70) Division 2 hazardous
(classified) location incendive wiring techniques.

Division 2 wiring

14

APT4000PH

Typical wirings pH

Temperature
probe

Combination
pH
electrode

Example 1:

pH measurement with monitoring of glass electrode

Sensor connections
APT4000PH

15

Temperature
probe

Glass
electrode

Example 2:

pH measurement with monitoring of glass electrode and reference electrode

Sensor connections
APT4000PH

Reference
electrode

16

APT4000PH

Typical wirings

Example 3:

pH measurement with DURAFET II electrode

orange

red

wt

rd/bk

yw

gn

bu

bk

wt/bk

Do not
connect:

Sensor connections
APT4000PH

Must use cap
adapter cable

17

Example 4:

pH measurement with MEREDIAN electrode

wt

wt

wt/bk

or

core

Sensor connections
APT4000PH

18

APT4000PH

ORP wirings

Example 5:

ORP measurement without monitoring of
reference electrode

Temperature
probe

Sensor connections
APT4000PH

19

Example 6:

ORP measurement with monitoring of
reference electrode

Temperature
probe

Sensor connections
APT4000PH

20

APT4000PH

Protective wiring of relay contacts

Relay contacts are subjected to electrical erosion. Especially
with inductive and capacitive loads, the service life of the con­tacts will be reduced. For suppression of sparks and arcing,
components such as RC combinations, nonlinear resistors,
series resistors and diodes should be used.

1

2

3

1

2

3

Typical AC applications
with inductive load

1 Load
2 RC combination, e.g. RIFA PMR 209

Typical RC combinations
for 230 V AC:
Capacitor 0.1µF / 630V,
Resistor 100 Ohms / 1 W

3 Contact

Protective wiring of switching outputs

21

A: DC application with inductive load
B: AC/DC applications with capacitive load
C: Connection of incandescent lamps

A1 Inductive load
A2 Free-wheeling diode, e.g. 1N4007 (Observe polarity)
A3 Contact
B1 Capacitive load
B2 Resistor, e.g. 8 Ohms/1 W at 24 V / 0.3 A
B3 Contact
C1 Incandescent lamp, max 60 W / 230 V, 30 W / 115 V
C3 Contact

Warning!
Make sure that the maximum ratings of the relay
contacts are not exceeded even during switching!

Typical protective wiring measures

22

APT4000PH

User interface and display

1 Display
2 Mode indicators (no keys),

from left to right:

- Measuring mode

- Calibration mode

- Alarm

- Wash contact active

- Configuration mode

3 Keypad
4 Coding
5 Rating plate
6 Model designation
7 Alarm LED

User interface

23

1234 56 78910

11

12

13

1617

20

18

19

15

14

1 Mode code entry
2 Display of meas. variable *
3 Temperature
4 Current output
5 Limit values
6 Alarm
7 Sensocheck
8 Calibration

9 Interval/response time
10 Wash contact
11 Measurement symbols
12 Proceed with ENTER
13 Bar for identifying the device

status, above mode indicators,
from left to right:

- Measuring mode

- Calibration mode

- Alarm

- Wash contact active

- Configuration mode

14 Lower display
15 Manual temp indicator
16 Hold mode active
17 Waiting time running
18 Electrode data
19 Main display
20 Sensoface

* Not in use

Display

24

APT4000PH

Operation: Keypad

Start, end calibration

Start, end configuration

Select digit position
(selected position flashes)

Edit digit

• Calibration:
Continue in program sequence

• Configuration: Confirm entries,
next configuration step

• Measuring mode: Display output current

Cal Info, display of asymmetry potential
and slope

Error Info, display last error message

Start GainCheck device self-test

+

25

Sensoface provides information on the electrode condi­tion. The asymmetry potential (zero), slope and
response time during calibration are evaluated. The
three Sensoface indicators provide the user with infor­mation about wear and required maintenance of the
sensor.

Note: When measuring with DURAFET electrodes,

Sensocheck is not active.

GainCheck device self test

A display test is carried out, the software version is displayed
and the memory and measured value transfer are checked.

Start GainCheck device self-test:

Automatic device self-test

The automatic device self-test checks the memory and meas­ured-value transfer. It runs automatically in the background at
fixed intervals.

+

Safety functions

Sensocheck, Sensoface sensor monitoring

Sensocheck continuously monitors the sensor and leads.
Sensocheck can be switched off (Configuration, Pg 51).

26

APT4000PH

Safety functions

Hold mode

Display:

The Hold mode is a safety state during configuration and cali­bration. Output current is frozen (LAST) or set to a fixed value
(Fix). Alarm and limit contacts are disabled.
If the calibration or configuration mode is exited, the
APT4000PH remains in the Hold mode for safety reasons.
This prevents undesirable reactions of the connected peripher­als due to incorrect configuration or calibration. The measured
value and “Hold” are displayed alternately. The APT4000PH
only returns to measuring mode after ENTER is pressed and a
waiting time of 20 s has passed.

27

To activate the Hold mode from outside

The Hold mode can be activated from outside by sending a
signal to the Hold input (e.g. from the process control system).

Hold active

Hold inactive

10 ... 30 V AC/DC 0 ... 2 V AC/DC

6

7

Hold

input

Process control system (PCS)

Power supply

12...24 V AC/DC

APT4000PH

28

APT4000PH

Configuration

In the Configuration mode you set the analyzer parameters.

Activate with CONF

Enter mode code “1200”
Edit parameter with and ,
confirm/continue with ENTER.
(End with CONF ENTER.)

During configuration the
APT4000PH remains in the Hold
mode for reasons of safety. The
output current is frozen (at its last
value or at a preset fixed value,
depending on the configuration),
limit and alarm contacts are inac­tive.
The controller is in the configured
state, Sensoface is off, mode indi­cator “Configuration” is on.

Activate

Hold

Input errors

The configuration parameters are
checked during the input. In the
case of an incorrect input “Err” is
displayed for approx. 3 s. The
incorrect parameters cannot be
stored. Input must be repeated.

End

End with CONF. The measured
value and Hold are displayed alter­nately, “enter” flashes. End Hold
mode with ENTER.
The display shows the measured
value. The output current remains
frozen for another 20 s (Hold icon
on, “hourglass” flashes).

Hold icon

29

Menu group

Code

Output 1

o1.

Output 2

o2.

Temperature
compensation

tc.

Calibration mode

CA.

Alarm
settings

AL.

Relay / Controller

rL.

Rinsing and cali­bration probes

Pb.

Display

Select menu group

Previous
menu group:

Menu structure of configuration

Menu item 1

Menu item 2

Menu item ...

The configuration steps are assigned to different menu groups.
With the arrow keys you can jump between the individual menu
groups.
Each menu group contains menu items for setting the parameters.
Pressing ENTER opens a menu item. The values are edited using the
arrow keys. Pressing ENTER confirms/stores the settings.
Return to measurement: Press CONF.

Select menu item

30

APT4000PH

Overview of configuration steps

Time constant of output filter
22 mA signal in the case of error
Signal behavior during Hold

Enter fixed value

out2

Output 2

o2.

Select temperature unit
Select temperature probe
Select current range
Enter current beginning
Enter current end
Time constant of output filter
22 mA signal in the case of temp error
Signal behavior during Hold

Enter fixed value

tc.

Temperature compensation

tc.

Temp detection during meas
Temp detection during cal
Enter TC process medium

CAL

Calibration mode

CA.

Select calibration mode
Enter cal timer interval

Menu

Code

out1

Output 1

o1.

Select measured variable
Select electrode type
Select current range
Enter current beginning
Enter current end

Selection / Default

pH / ORP

GLAS EL / FEt EL

0-20 mA / 4-20 mA

XX.XX pH / XXXX mV (00.00 pH)

XX.XX pH / XXXX mV (14.00 pH)

0 .... 120 SEC (0 SEC )

ON / OFF

LAST / Fix

000.0 ... 021.0 mA (021.0 mA)

°C / °F

Pt100/Pt1000/NTC30/ NTC8.55

0-20 mA / 4-20 mA

XXX.X (000.0 °C )

XXX.X (100.0 °C )

0 ... 120 (0 SEC)

ON / OFF

LAST / Fix

000.0 ... 021.0 mA (021.0 mA)

Auto/man (man: XXX.X°C (025.0°C))

Auto/man (man: XXX.X°C (025.0°C))

-19.99 ... +19.99%/K (00.00%/K)

-04-BUF / MAN / DAT

0000 ... 9999 h (0000 h)

31

Menu

Code

Selection / Default

ALrt

Alarm settings

AL.

Select Sensocheck

Enter alarm delay

LED in Hold mode

rLAY

Relay 1/2: Limit values, controller

rL.

Select limit function / controller

Select contact function

L1.

Select contact response

Enter switching point

Enter hysteresis

Enter delay

Select contact function

L2.

Enter controller setpoint

Ct.

Enter neutral zone

(P) Controller gain K

P

(I) Reset time T

R

(D) Rate time T

D

Controller

PLC: Pulse length

PFC: Pulse frequency

Select Hold behavior

PrbE

Rinsing and cleaning probes

Pb.

Select cleaning / calibration probe

Rinsing interval

rinse

Rinse duration

Contact response

Cleaning interval

EASYCLN

Select contact response
Enter switching point

Enter hysteresis

Enter delay

Calibration interval

Lock cleaning / calibration interval

ON /

OFF

0000 ... 0600 SEC (0010 SEC)
ON / OFF

LiMIT / CtROL
Lo / Hi
N/O / N/C

XX.XX pH / XXXX mV

(00.00 pH)

XX.XX pH / XXXX mV

(00.50 pH)

0000 ... 9999 SEC (0010 SEC)

Lo / Hi

XX.XX pH / XXXX mV

(07.00 pH)

XX.XX pH / XXXX mV

(01.00 pH)

0010 ... 9999 % (

100 %

)
0000 ... 9999 SEC (0000 SEC)
0000 ... 9999 SEC (0000 SEC)
PLC / PFC

0001 ... 0600 SEC (0010 SEC)

0001 ... 0180 /min (0060 /min)
Y LAST / Y Off

EASYCLN / rinse

000.0 ... 999.9 h (

000.0 h

)

0000 ... 1999 SEC (0060 SEC)

N/O /

N/C

000.0 ... 999.9 h (

000.0 h

)

N/O / N/C

XX.XX pH / XXXX mV(14.00 pH

)

XX.XX pH / XXXX mV

(00.50 pH)

0000 ... 9999 SEC (

0010 SEC

)

000.0 ... 999.9 h (000.0 h)

ON / OFF

32

APT4000PH

Configuration

Output 1
Select type of electrode. Measurement procedure.

Select measured variable

Select electrode type

Select 0-20 / 4-20 mA

Enter current beginning

Enter current end

Set output filter

22 mA in the case of error

Hold mode

End:

Press CONF, then ENTER

code

Output 1

o1.

Display

Menu group

Select menu item

33

Note: Characters represented in gray are flashing and can be edited.

Code

Display

Action

Choices

o1.

Select configuration
(Press CONF.)

Enter mode code “1200”
(Select position with key and
edit number with key.
When the display reads “1200”,
press ENTER to confirm.)

The APT4000PH is in Hold mode
(Hold icon is on).

Select measured variable pH/ORP
Select with key
Proceed with ENTER

pH/ORP

Only with pH selected:
Select electrode type:

• ISFET electrode

• Glass electrode
Select with key
Proceed with ENTER

FEt

(Glas)

After correct input a wel­come text (ConF) is dis­played for approx. 3 s

34

APT4000PH

Configuration

Output 1

Output current range. Current beginning. Current end.

Select measured variable

Select electrode type

Select 0-20 / 4-20 mA

Enter current beginning

Enter current end

Set output filter

22 mA in the case of error

Hold mode

End:

Press CONF, then ENTER

Code

Output 1

o1.

Display

Menu group

Select menu item

35

Code

4–20 mA

(0–20 mA)

Display

Action

Choices

o1.

Set output current range
Select with key
Proceed with ENTER

Current beginning
Enter lower end of scale, depending
on measured variable selected
(pH or ORP)
Select with key,
edit number with key,
proceed with ENTER

00.00 pH

(pH:

-2 ... 16)
/ (ORP:

-1500 mV
to
+1500 mV)

Current end
Enter upper end of scale, depending
on measured variable selected
(pH or ORP)
Select with key,
edit number with key,
proceed with ENTER

14.00 pH

(pH:

-2 ... 16)
/ (ORP:

-1500 mV
to
+1500 mV)

Output current

[pH]

204

14

0

Assignment of measured values:
Current beginning and current end

[pH]

204

7

5

[mA]

Example 1: Range pH 0 to 14 Example 2: Range pH 5 to 7

Advantage: Higher resolution in
range of interest

[mA]

Output current

36

APT4000PH

Configuration

Output 1
Time constant of output filter

Select measured variable

Select electrode type

Select 0-20 / 4-20 mA

Enter current beginning

Enter current end

Set output filter

22 mA in the case of error

Hold mode

End:

Press CONF, then ENTER

Code

Output 1

o1.

Display

Menu group

Select menu item

37

0 SEC

(0 to

120 SEC)

Code

Display Action

Choices

o1.

Time constant of output filter
Default setting: 0 s (inactive).
To specify a time constant:
Select with key,
edit number with key,
proceed with ENTER

Time constant of output filter

To smoothen the current output, a low-pass filter with
adjustable filter time constant can be switched on. When there
is a jump at the input (100 %), the output level is 63 % after
the time constant has been reached.
The time constant can be set from 0 to 120 s.
If the time constant is set to 0 s, the current output follows the
input.

Note:

The filter only acts on the current output, not on the display, the
limit values, or the controller!

Time constant 0 to 120 s

38

APT4000PH

Configuration

Output 1
Output current during Error and Hold.

Select measured variable

Select electrode type

Select 0-20 / 4-20 mA

Enter current beginning

Enter current end

Set output filter

22 mA in the case of error

Hold mode

End:

Press CONF, then ENTER

Code

Output 1

o1.

Display

Menu group

Select menu item

39

OFF

(ON)

Code

Display

Action

Choices

o1.

22 mA signal for error message
Select with key
Proceed with ENTER

Output signal during Hold
LAST:
During Hold the last measured value
is maintained at the output
FIX:
During Hold a value (to be entered) is
maintained at the output.
Select with key
Proceed with ENTER

LAST

(FIX)

Only with FIX selected:
Enter current which is to flow at the
output during Hold
Select with key,
edit number with key,
proceed with ENTER

021.0 mA

(000.0 to

021.0 mA)

Output signal for Hold:

Output current
[mA]

Output signal Hold
Setting FIX = 21.0 mA

Hold active

21

4

Output signal HOLD
Setting LAST

Hold active

40

APT4000PH

Configuration

Output 2
Temperature unit and probe. Output current.

Select °C/°F

Select temperature probe

Select 0-20 / 4-20 mA

Enter current beginning

Enter current end

Set output filter

22 mA for temp error

Hold mode

End:

Press CONF, then ENTER

Code

Display

Menu group

Select menu item

Output 2

o2.

41

°C

(°F)

Code

Display

Action

Choices

o2.

Specify temperature unit
Select with key
Proceed with ENTER

Select temperature probe
Select with key
Proceed with ENTER

NTC8.55

(NTC30,
PT100,
PT1000)

4–20 mA

(0–20 mA)

Set output current range
Select with key
Proceed with ENTER

Current beginning:
Enter lower end of scale.
Select with key, edit number with

key, proceed with ENTER

000.0 °C

(XXX.X)

Current end:
Enter upper end of scale.
Select with key, edit number with

key, proceed with ENTER

100.0 °C

(XXX.X)

Output current

Process temperature

204

100

0

Process temperature: Current beginning and current end

Process temperature

204

70

50

[mA]

Example 1: Range 0 to 100 °C Example 2: Range 50 to 70 °C.

Advantage: Higher resolution in
range of interest

[°C]

[°C]

[mA]

42

APT4000PH

Configuration

Output 2
Time constant of output filter.

Select °C/°F

Select temperature probe

Select 0-20 / 4-20 mA

Enter current beginning

Enter current end

Set output filter

22 mA for temp error

Hold mode

End:

Press CONF, then ENTER

Output 2

o2.

Code

Display

Menu group

Select menu item

43

0 SEC

(0 to
120 SEC)

Code

Display

Action

Choices

o2.

Time constant of output filter
Default setting: 0 s (inactive).
To specify a time constant: Select
with key, edit number with
key, proceed with ENTER

Time constant of output filter

To smoothen the current output 2, a low-pass filter with
adjustable filter time constant can be switched on. When there
is a jump at the input (100 %), the output level is 63 % after
the time constant has been reached.
The time constant can be set from 0 to 120 s.
If the time constant is set to 0 s (default), the current output fol­lows the input.

Note:

The filter only acts on the current output, not on the display!

Time constant 0 to 120 s

44

APT4000PH

Configuration

Output 2
Temperature error. Output current during Hold.

Select °C/°F

Select temperature probe

Select 0-20 / 4-20 mA

Enter current beginning

Enter current end

Set output filter

22 mA for temp error

Hold mode

End:

Press CONF, then ENTER

Output 2

o2.

Code

Display

Menu group

Select menu item

45

OFF

(ON)

Code

Display

Action

Choices

o2.

22 mA signal for error message
Select with key
Proceed with ENTER

Output signal during Hold
LAST:
During Hold the last measured value
is maintained at the output
FIX:
During Hold a value (to be entered)
is maintained at the output
Select with key
Proceed with ENTER

LAST

(FIX)

Only with FIX selected:
Enter current which is to flow at the
output during Hold
Select with key,
edit number with key,
proceed with ENTER

021.0 mA

(000.0 to

021.0 mA)

Output signal during Hold:

Output current
[mA]

Output signal Hold
Setting FIX = 21.0 mA

Hold active

21

4

Output signal Hold
Setting LAST

Hold active

46

APT4000PH

Configuration

Temperature compensation

Temp detection for meas/cal. TC process medium

Temp during measurement

Temp during calibration

Enter TC process medium

End:

Press CONF, then ENTER

Temperature
compensation

tc.

Code

Display

Menu group

Select menu item

47

AUT

(MAN)

Code

Display

Action

Choices

tc.

Select temp detection during meas­urement (Auto/MAN)
AUTO: Temp detection with temper­ature probe
MAN: Manual temperature input
Select with key,
proceed with ENTER

Only with manual temp detection
selected (MAN)
Enter temperature.
Select position with key,
edit number with key,
proceed with ENTER

25 °C

(XXX.X)

Select temp detection during
calibration (Auto/MAN)
Select with key,
proceed with ENTER

AUT

(MAN)

Only with manual temp detection
selected (MAN)
Enter temperature.
Select position with key,
edit number with key,
proceed with ENTER

For pH measurement only:
Enter temperature compensation of
process medium
Select position with key,
edit number with key,
proceed with ENTER

00.00
%/K

(-19.99
to 19.99
%/K)

25 °C

(XXX.X)

48

APT4000PH

Configuration

Calibration mode

Calibration mode

Cal timer interval

Code

Display

Menu group

Select menu item

Calibration mode

CA.

End:

Press CONF, then ENTER

49

-O4-BUF

(-01-BUF/

-02-BUF/

-03-BUF/

-04-BUF/

-05-BUF/

-06-BUF/

-07-BUF/
MAN/
DAT)

Code

Display

Action

Choices

CA.

For pH measurement only:
Select calibration mode
BUF: Calibration with Calimatic auto­matic buffer selection.
To do so, you must select your buffer
set:

-01- BUF: Mettler-Toledo

-02-BUF: Merck Titrisols, Riedel Fixanals

-03-BUF: Ciba (94)

-04-BUF: NIST technical buffers

-05-BUF: NIST standard buffers

-06-BUF: HACH buffers

-07-BUF: WTW technical buffers

MAN: Calibration with
manual buffer entry

DAT: Entry of asymmetry potential
and slope of premeasured electrodes
Select with key,
proceed with ENTER

Enter calibration interval:
Entry of time interval within which
the analyzer is to be calibrated.
With a time interval of 0000 hrs the
calibration timer is not active.
Select position with key,
edit number with key,
proceed with ENTER

0000 h

(0000 to
9999 h)

50

APT4000PH

Configuration

Alarm settings

Select Sensocheck

Delay

LED in Hold mode

Code

Display

Menu group

Select menu item

Alarm
settings

AL.

End:

Press CONF, then ENTER

15

16

Alarm

Alarm contact

The alarm contact is closed during normal operation
(N/C). It opens in the case of alarm or power outage.
As a result, a failure message is provided even in the
case of line breakage (fail-safe behavior). For contact rat­ings, see Specifications.

Error messages can also be signaled by a 22 mA output
current (see Pg 39,

The operating behavior of the alarm contact is shown on
Pg 90.

The alarm delay acts on the LED, the 22 mA signal
and the alarm contact.

45,

86).

51

Code

Display

Action

Choices

ON /

OFF

AL.

Select Sensocheck
(continuous monitoring of glass and
reference electrode – not available
with DURAFET II pH electrode)
Select with key,
proceed with ENTER

Alarm delay
Select with key, edit number with

key, proceed with ENTER

0010 SEC

(0000 to
0600 SEC)

LED in Hold mode
Select with key, edit number with

key, proceed with ENTER

ON /

OFF

Parameter setting

Alarm Hold

ON

on flashes

OFF

flashes off

LED state:

52

APT4000PH

Configuration

Limit function
Relay 1

Contact function

Contact response

Enter switching point

Enter hysteresis

Delay

Relay 2 menu group

Controller menu group

L1.

L2.

Ct.

Relay / Controller

rL.

Code

Display

Menu group

Select menu item

End:

Press CONF, then ENTER

53

LiMIT

(CtROL)

Code

Display

Action

Choices

rL.

Use of relays:

• Limit function (LiMIT)

• Controller (CtROL)

Select with key,
proceed with ENTER

Note: Selecting CtROL leads to
Controller menu group Ct.

Lo

(Hi)

Limit 1 function , see Page 55.

Select with key,
proceed with ENTER

Limit 1 contact response
N/C: normally closed contact

N/O: normally open contact

Select with key,
proceed with ENTER

N/O

(N/C)

Limit 1 switching point

Select with key, edit number with

key, proceed with ENTER

00.00 pH

(

XX.XX pH

XXXX mV)

Limit 1 hysteresis

Select with key, edit number with

key, proceed with ENTER

00.50 pH

(

XX.XX pH

XXXX mV)

Limit 1 delay
The contact is activated with
delay (deactivated without delay)

Select with key, edit number with

key, proceed with ENTER

0010 SEC

(

0 to

9999 SEC)

L1.

54

APT4000PH

Configuration

Limit function
Relay 2

Relay 1 menu group

Contact function

Contact response

Enter switching point

Enter hysteresis

Delay

Controller menu group

L1.

L2.

Ct.

Relay / Controller

rL.

Code

Display

Menu group

Select menu item

End:

Press CONF, then ENTER

55

Code

Display Action

Choices

L2.

Hi

(Lo)

Select Limit 2, see Fig. below.

Select with key,
proceed with ENTER

Limit 2 contact response
N/C: normally closed contact
N/O: normally open contact

Select with key,
proceed with ENTER

N/O

(N/C)

Limit 2 switching point

Select with key, edit number with

key, proceed with ENTER

14.00 pH

(

XX.XX pH

XXXX mV)

Limit 2 hysteresis

Select with key, edit number with

key, proceed with ENTER

00.50 pH

(

XX.XX pH

XXXX mV)

Limit 2 delay
The contact is activated with
delay (deactivated without delay)

Select with key, edit number with

key, proceed with ENTER

0010 SEC

(

0 to

9999 SEC)

Limit Lo

Hysteresis +

Switching
point

Contact

0

1

Signal

Limit Hi

Hysteresis -

Signal

Switching
point

Contact

0

1

56

APT4000PH

Configuration

Controller
(for description see Pg 82 and the following)
Setpoint. Neutral zone

Relay 1 menu group

Relay 2 menu group

Controller setpoint

Enter neutral zone

(P) Controller gain

(I) Reset time TR

(D) Rate time TD

Pulse length/Pulse frequency

PLC: Pulse length

PFC: Pulse frequency

Hold behavior

L1.

L2.

Ct.

Relay / Controller

rL.

Code

Display

Menu group

Select menu item

End:

Press CONF, then ENTER

01.00 pH

(

XX.XX pH /

XXXX mV)

07.00 pH

(

XX.XX pH /

XXXX mV)

Setpoint
Select with key, edit number with

key, proceed with ENTER

Neutral zone (dead band)
Select with key, edit number with

key, proceed with ENTER

Controller: P-action component
Select with key, edit number with

key, proceed with ENTER

57

Code

Display

Action

Choices

Ct.

0100 %

(0010 to
9999 %)

Controller: I-action component (reset
time). Select with key, edit number
with key, proceed with ENTER

0000 SEC

(0000 to
9999 SEC)

Controller: D-action component
(Rate time).
Select with key, edit number with

key, proceed with ENTER

0000 SEC

(0000 to
9999 SEC)

Pulse length/Pulse frequency

Select with key,
proceed with ENTER

PLC

(PFC)

PLC: Pulse length
Select with key, edit number with

key, proceed with ENTER

0010 sec

(0001 to
0600 SEC)

PFC: Pulse frequency
Select with key, edit number with

key, proceed with ENTER

0060

/min

(0001 to
0180 /min)

Behavior during Hold
Select with key,
proceed with ENTER

Y LAST

(Y Off)

58

APT4000PH

Configuration

Control of rinsing and calibration probes

Rinsing/calibration probe

Rinsing interval

Rinse duration

Contact response

Cleaning interval

Rinsing and cali­bration probes

Pb.

Code

Display

Menu group

Select menu item

Calibration interval

rinse

(EASYCLN)

EASYCLN:
see opposite
page

Code

Display

Action (rinsing probe)

Selection

Pb.

Control of:

• Rinsing probe (rinse)

• Calibration probe (EasyClean)

Select with key
Proceed with ENTER

000.0 h

(

XXX.X h)

Rinsing interval

Select with key, edit number
with key, proceed with ENTER

Rinse duration

Select with key, edit number
with key, proceed with ENTER

0060 s

(0000 to
1999 SEC)

Contact type

Select with key
Proceed with ENTER

N/O

(

N/C)

59

EASYCLN

Code

Display

Action (calibration probe)

Selection

Pb.

Calibration probe (EasyClean)
Select with key
Proceed with ENTER

Cleaning interval
(EasyClean only)
Select with key, edit number
with key, proceed with ENTER

000.0 h

(

XXX.X h)

000.0 h

(

XXX.X h)

Calibration interval
(EasyClean only)
Select with key, edit number
with key, proceed with ENTER

Off

(

On)

Lock cleaning (calibration)
interval*

On: The APT4000PH only starts a
cleaning (calibration) interval if the
measured value lies within the toler­ated range (Limit Lo/Limit Hi).

*“Lock cleaning (calibration) interval” function:

Limit Hi

Limit Lo

Locked

t

ppb

Locked

The APT4000PH only starts a
cleaning (calibration) interval if the
measured value lies within the
tolerated range (Limit Lo/Limit Hi).
(For limit setting, refer to Pages 53,

55)

60

APT4000PH

Parameter set 1/2

Display

Action Remark

Select parameter set 1 or 2.
Select with key,
proceed with ENTER

Switch between parameter sets
Press CONF key,
ENTER code 7654
Select with key, edit number
with key, proceed with ENTER

Wrong settings change
the measurement
properties!

If an invalid code is
entered, the
APT4000PH returns to
measuring mode.

Welcome display
(ConF) appears
for approx. 3 sec

Since the complete device config­uration is changed in one step,
there is a security prompt
(No/Yes). When pressing ENTER
directly, the selection is not
stored.

61

Two complete parameter sets are stored in the EEPROM.
As delivered, the two sets are identical but can be edited.

Note:

Fill in your configuration data on the following pages.

Code. Parameter Default setting

o1. pH/ORP unit pH
o1. Electrode type FEt
o1. 0/4-20 mA 4-20 mA
o1. Current beginning 00.00 pH
o1. Current end 14.00 pH
o1. Filter time 0 sec
o1. 22mA signal OFF
o1. Hold behavior LAST
o1. Fix current 021.0 mA
o2. Unit °C / °F °C
o2. Temp probe 8.55 NTC
o2. 0/4...20mA 4-20 mA
o2. Current beginning 000.0 °C
o2. Current end 100.0 °C
o2. Filter time 0 sec
o2. 22mA signal OFF
o2. Hold behavior LAST
o2. Fix current 021.0 mA
tc. TC measurement Auto
tc. Measuring temp 025.0 °C
tc. TC calibration Auto
tc. Calibration temp 025.0 °C
tc. TC medium 00.00 %/K
CA. Cal solution -04-BUF
CA. Cal interval 0000 h
AL. Sensocheck OFF
AL. Alarm delay 0010 sec
AL. LED Hold off

Code. Parameter Default setting

rL. Relay function Limit
L1. Contact function Lo
L1. Contact response N/O
L1. Switching point 00.00 pH
L1. Hysteresis 00.50 pH
L1. Delay 0010 sec
L2. Contact function Hi
L2. Contact response N/O
L2. Switching point 14.00 pH
L2. Hysteresis 00.50 pH
L2. Delay 0010 sec
Ct. Setpoint 07.00 pH
Ct. Neutral zone 01.00 pH
Ct. P action 0100 %
Ct. I action 0000 sec
Ct. D action 0000 sec
Ct. PLC/PFC controller PLC
Ct. Pulse length 0010 sec
Ct. Pulse frequency 0060 /min
Ct. Hold behavior LAST
Pb. EasyCLN/Rinse Rinse
Pb. Rinsing interval 000.0 h
Pb. Rinse duration 0060 sec
Pb. Contact type N/O
Pb. Cleaning interval 000.0 h
Pb. Calibration interval 000.0 h
Pb. Lock interval Off

Default settings of parameter sets

62

APT4000PH

Code. Parameter Setting

o1. pH/ORP unit ____________ ____________
o1. Electrode type ____________ ____________
o1. 0/4-20 mA ____________ ____________
o1. Current beginning ____________ ____________
o1. Current end ____________ ____________
o1. Filter time ____________ ____________
o1. 22mA signal ____________ ____________
o1. Hold behavior ____________ ____________
o1. Fix current ____________ ____________

o2. Unit °C / °F ____________ ____________
o2. Temp probe ____________ ____________
o2. 0/4...20mA ____________ ____________
o2. Current beginning ____________ ____________
o2. Current end ____________ ____________
o2. Filter time ____________ ____________
o2. 22mA signal ____________ ____________
o2. Hold behavior ____________ ____________
o2. Fix current ____________ ____________

tc. TC measurement ____________ ____________
tc. Measuring temp ____________ ____________
tc. TC calibration ____________ ____________
tc. TC medium ____________ ____________

CA. Cal solution ____________ ____________
CA. Cal interval ____________ ____________

AL. Sensocheck ____________ ____________
AL. Alarm delay ____________ ____________
AL. LED Hold ____________ ____________

Parameter set – user settings

63

Code. Parameter Setting

rL. Relay function ____________ ____________

L1. Contact function ____________ ____________
L1. Contact response ____________ ____________
L1. Switching point ____________ ____________
L1. Hysteresis ____________ ____________
L1. Delay ____________ ____________

L2. Contact function ____________ ____________
L2. Contact response ____________ ____________
L2. Switching point ____________ ____________
L2. Hysteresis ____________ ____________
L2. Delay ____________ ____________

Ct. Setpoint ____________ ____________
Ct. Neutral zone ____________ ____________
Ct. P action ____________ ____________
Ct. I action ____________ ____________
Ct. D action ____________ ____________
Ct. PLC/PFC controller ____________ ____________
Ct. Pulse length ____________ ____________
Ct. Pulse frequency ____________ ____________
Ct. Hold behavior ____________ ____________

Pb. EasyCLN/Rinse ____________ ____________
Pb. Rinsing interval ____________ ____________
Pb. Rinse duration ____________ ____________
Pb. Contact type ____________ ____________
Pb. Cleaning interval ____________ ____________
Pb. Calibration interval ____________ ____________
Pb. Lock interval ____________ ____________

64

APT4000PH

Calibration

Calibration adjusts the analyzer to the electrode.

Activate with CAL

Enter mode code: 1100
Select with key,
edit number with key,
proceed with ENTER
(End with CAL ENTER.)

During calibration the APT4000PH
remains in the Hold mode for rea­sons of safety. Output current is
frozen (last value or preset fixed
value, depending on configuration),
limit and alarm contacts are inac­tive. The controller is in the config­ured state, Sensoface is off, mode
indicator “Configuration” is on.

Activate

Hold

Input errors

The calibration parameters are
checked during the input. In the
case of an incorrect input ”Err” is
displayed for approx. 3 sec. The
incorrect parameters cannot be
stored. Input must be repeated.

End

End with CAL.
The measured value and Hold are
displayed alternately, “enter”
flashes.
Press ENTER to end the Hold mode.
The measured value is displayed.
The output current remains frozen
for another 20 sec (Hold icon on,
“hourglass” flashes).

Hold icon

65

pH calibration

Calibration is used to adapt the analyzer to the individual elec­trode characteristics, namely asymmetry potential and slope.
Calibration can be performed with Calimatic automatic buffer
recognition, with manual buffer input, by entering premea­sured electrode data, or by sampling the product.

When using DURAFET electrodes, you must adjust
the zero point first. Then you can conduct either a
one or a two-point calibration.

Caution

• All calibration procedures must be performed by trained
personnel. Incorrectly set parameters may go unnoticed,
but change the measuring properties.

• The response time of the electrode and temperature probe is
considerably reduced if the electrode is first moved about in
the buffer solution and then held still.

• The analyzer can only operate properly when the buffer
solutions used correspond to the configured set. Other buffer
solutions, even those with the same nominal values, may
demonstrate a different temperature behavior.
This leads to measurement errors.

When using DURAFET electrodes or electrodes with
a zero point other than pH 7, the nominal zero point

must be adjusted each time a new electrode is connected. This
is important if you want to obtain reliable Sensoface messages.
The Sensoface messages issued during all further calibrations
are based on this basic calibration.

Display

Action

Remark

If the zero offset of
the electrode is too
large (> ± 200 mV),
the CAL ERR error
message is generated.
In that case the elec­trode cannot be cali­brated.

Zero adjustment

Allows use of electrodes with differing nominal zero (DURAFET II pH electrodes)

Press CAL key,
enter code 1001
Select with key,
edit number with key,
proceed with ENTER

Immerse electrode in a pH 7.00
buffer.
Enter the temperature-corrected
pH value in the range 6.50 to 7.50
using the arrow keys
(see buffer table).
Confirm with ENTER.

APT4000PH is in the
Hold mode.
If an invalid code is
entered, the
APT4000PH returns to
measuring mode.

66

APT4000PH

Ready for calibration
The“CAL”, and “enter” icons are
flashing

Display (3 s)

Stability check:
The measured mV value is dis­played.
The “hourglass” icon is flashing.

Note:
Stability check can be
stopped (by pressing
CAL). However, this
reduces calibration
accuracy.

67

Display

Action

Remark

At the end of the adjustment pro­cedure asymmetry potential [mV]
(based on 25 °C) of the electrode
are displayed. Proceed with ENTER

These is not the final
electrode value!
Zero and slope must
be determined with a
complete 2-point cali­bration (cal 1100)
(see following pages).

Security prompt.
Display of pH value (alternately
with Hold) and temperature,
“enter” flashes, Sensoface is
active.

Place electrode in process.

Press ENTER to end the
zero point calibration.

After end of calibra­tion, the outputs
remain in Hold mode
for approx. 20 sec.

Information on zero adjustment

After having adjusted the nominal zero point, be sure to calibrate the electrode
following one of the procedures as described on the next pages:

• Automatic calibration with Calimatic

• Manual calibration

• Data entry of premeasured electrodes

68

APT4000PH

Display

Action

Remark

Buffer recognition
While the “hourglass” icon flash­es, the electrode and temperature
probe remain in the first buffer
solution.

Automatic calibration with Calimatic (BUF -xx-)
Temperature detection automatic or manual

Press CAL key, enter code 1100.
Select with key,
edit number with key,
proceed with ENTER

Remove the electrode and
temperature probe, clean them
and immerse them in the first
buffer solution (in any order).
When “Manual temp detection”
has been configured, enter value in
the secondary display using the
arrow keys. Start with

ENTER

.

If an invalid code is
entered, the
APT4000PH returns
to measuring mode.

The response time of
the electrode and
temperature probe is
considerably reduced
if the electrode is
first moved about in
the buffer solution
and then held still.

Buffer recognition terminated,
the nominal buffer value is dis­played.

Analyzer in Hold
mode, measured
value frozen.
Sensoface inactive.

The analyzer can only operate properly when the buffer solutions used correspond
to the configured set. Other buffer solutions, even those with the same nominal
values, may demonstrate a different temperature behavior. This leads to measure­ment errors.

69

Display Action

Remark

Stability check:
The measured mV value is dis­played.

To abort stability
check: Press CAL.

(accuracy reduced)

Calibration with the first buffer is
terminated. Remove the electrode
and temp probe from the first
buffer solution and rinse them
thoroughly.

• One-point calibration:
End with CAL.

Slope [%] and asymmetry poten­tial [mV] of the electrode are dis­played.

Proceed with ENTER

.

For one-point
calibration only:

• Two-point calibration:

Immerse electrode and temp
probe in the second buffer
solution.
Start with

ENTER

.

The calibration
process runs again as
for the first buffer.

Retract electrode and temp probe
out of second buffer,
rinse off, re-install.
Repeat calibration: CAL,
End calibration:

ENTER.

Slope and asymmetry
potential of electrode
(related to 25 °C) are
displayed.

pH value and Hold are displayed
alternately.
Proceed with

ENTER.

Hold is deactivated after 20 s

Security prompt.

70

APT4000PH

Display

Action

Remark

Enter the pH value of your buffer
solution for the proper tempera­ture. While the “hourglass” icon
flashes, the electrode and temper­ature probe remain in the first
buffer solution.

Manual calibration
Temperature detection automatic or manual

Press CAL key,
enter code 1100
Select with key,
edit number with key,
proceed with ENTER

Remove the electrode and
temperature probe, clean them
and immerse them in the first
buffer solution (in any order).
When “Manual temp detection”
has been configured, enter value in
the secondary display using the
arrow keys. Start with

ENTER

.

If an invalid code is
entered, the
APT4000PH returns
to measuring mode.

The response time of
the electrode and
temperature probe is
considerably reduced
if the electrode is
first moved about in
the buffer solution
and then held still.

Analyzer in Hold
mode, measured
value frozen.
Sensoface inactive.

For calibration with manual buffer specification, you must enter the pH value of
the buffer solution used in the analyzer for the proper temperature. This presetting
enables calibration with any desired buffer solution. The MAN calibration mode
and the type of temperature detection are selected in the configuration mode.

71

Display Action

Remark

Stability check:
The measured mV value is dis­played.

To abort stability
check: Press CAL.

(accuracy reduced)

Calibration with the first buffer is
terminated. Remove the electrode
and temp probe from the first
buffer solution and rinse them
thoroughly.

• One-point calibration:
End with CAL.

Slope [%] and asymmetry poten­tial [mV] of the electrode are dis­played. Proceed with

ENTER

.

For one-point
calibration only:

• Two-point calibration:
Immerse electrode and
temperature probe in the second
buffer solution.
Enter the pH value of the second
buffer solution.
Start with

ENTER

.

The calibration
process runs again as
for the first buffer.

Retract electrode and temp probe
out of second buffer, rinse off, re­install.
Repeat calibration: CAL,
End calibration:

ENTER

.

Slope and asymmetry
potential of electrode
(related to 25 °C) are
displayed.

pH value and Hold are displayed
alternately.
Proceed with

ENTER.

Hold is deactivated after 20 s

Security prompt.

72

APT4000PH

Display

Action

Remark

Enter asymmetry potential [mV].
Select with key,
edit number with key,
proceed with ENTER

Data entry of premeasured electrodes

Press CAL key, enter code 1100
Select with key,
edit number with key,
proceed with ENTER

Ready for calibration
Start with

ENTER

.

If an invalid code is
entered, the
APT4000PH returns
to measuring mode.

Analyzer in Hold
mode, measured
value frozen.
Sensoface inactive.

You can directly enter the values for slope and asymmetry potential of an elec­trode. The values must be known, e.g. determined beforehand in the laboratory.
The DAT calibration mode must be preset in the configuration mode.

Enter slope [%].
Select with key,
edit number with key,
proceed with ENTER

The APT4000PH displays the new
slope and asymmetry potential
(at 25 °C).
Proceed with ENTER.

pH value and Hold are displayed
alternately.
Proceed with ENTER.
Hold is deactivated after 20 sec.

Security prompt.

73

Convert slope [%] to slope [mV/pH] at 25 °C:

% mV/pH

78 46.2
80 47.4
82 48.5
84 49.7
86 50.9
88 52.1
90 53.3
92 54.5
94 55.6
96 56.8
98 58.0

100 59.2

102 60.4

Converting
asymmetry potential in electrode zero point:

ZERO = 7 -

V

AS

[mV]

S [mV / pH]

ZERO

V

AS

S

Electrode zero point
Asymmetry potential

Slope

74

APT4000PH

Product calibration

Calibration by sampling

During product calibration the electrode remains in the process.
The measurement process is only interrupted briefly.
Procedure: During sampling the currently measured value is
stored in the APT4000PH. The APT4000PH immediately returns
to measuring mode. The calibration mode indicator flashes and
reminds you that calibration has not been terminated.
The sample is measured in the lab or directly on the site using
a portable meter. To ensure an exact calibration, the sample
temperature should correspond to the measured process tem­perature. The sample value is then entered in the APT4000PH.
From the difference between the stored measured value and
entered sample value, the APT4000PH calculates the new
asymmetry potential (one-point calibration).
If the sample is invalid, you can take over the value stored dur­ing sampling. In that case the old calibration values are stored.
Afterwards, you can start a new product calibration.

Display

Action

Remark

Product calibration step 1:
Press CAL key,
enter code 1105
(Select with key,
edit number with key,
proceed with ENTER )

Take sample and store value.
Proceed with ENTER

If an invalid code is
entered, the
APT4000PH returns
to measuring mode.

Now the sample can
be measured in the
lab.

75

Display

Action

Remark

Measuring mode:

From the flashing CAL mode indi­cator you see that sample calibra­tion has not been terminated.

Product calibration step 2:
When the sample value has been
determined, call up the product
calibration once more
(CAL, code 1105).

Display
(approx. 3 sec)

Enter lab value. The new asym­metry potential is calculated.

While the sample
value is determined,
the APT4000PH is in
measuring mode.

Display of slope and new
asymmetry potential
(related to 25°C).
End calibration with ENTER.

The measured value is shown in
the main display alternately with
“Hold”; “enter” flashes.
End with ENTER.

After end of calibra­tion, the outputs
remain in Hold mode
for approx. 20 sec.

New calibration:
Press CAL.

76

APT4000PH

ORP calibration

ORP calibration mode is automatically preset when ORP meas­urement is configured. The potential of a redox electrode can
be calibrated using a redox buffer solution. For this purpose,
the difference between the potential measured and the poten­tial specified for the calibration solution is determined. During
measurement, the APT4000PH then adds this difference to the
potential measured.

0
10
20
25
30
40
50
60
70
80

Temperature
[°C]

Ag/AgCl/KCl
1 mol/l
[∆mV]

Ag/AgCl/KCl
3 mol/l
[∆mV]

Thalamid
[∆mV]

Mercury
sulfate
[∆mV]

249
244
240
236
233
227
221
214
207
200

224
217
211
207
203
196
188
180
172
163

-559

-564

-569

-571

-574

-580

-585

-592

-598

-605

672
664
655
651
647
639
631
623
613
603

Temperature dependence of commonly used reference systems

mV

ORP

=mV

meas

+ ∆mV

mV

ORP

=

mV

meas

=

∆mV =

displayed ORP
direct electrode potential
delta value, calculated during
calibration

It is also possible to relate the elctrode potential to another ref­erence system – such as the standard hydrogen electrode. In
that case, the temperature-corrected potential (see table) of
the reference electrode used must be entered. During measure­ment, this value is then added to the ORP measured.
Please make sure that measurement and calibration tempera­ture are the same, since the temperature response of the refer­ence electrode is not automatically taken into account.

77

Display

Action

Remark

Activate calibration
(Press CAL).
Enter mode code 1100
Select with key, edit number
with key, proceed with ENTER.

Remove the electrode and temper­ature probe, clean them and
immerse them in the redox buffer.

If an invalid code is
entered, the
APT4000PH returns
to measuring mode.

Display
(approx. 3 sec)
APT4000PH is in the
Hold mode.

Enter desired value for redox buffer
(Secondary display: Electrode
potential displayed for approx. 6 s)
Select with key,
edit number with key,
proceed with ENTER

After approx. 6 s the
secondary display
shows the measured
temperature.

Display of electrode data
(delta value)
Proceed with ENTER.
Rinse electrode and temperature
probe and reinstall them.

“Zero” and “enter”
icons are flashing,
Sensoface is active.

The measured ORP value [mV] is
shown in the main display alter­nately with “Hold”,
“enter” flashes.
End with ENTER.

After end of calibra­tion, the outputs
remain in Hold mode
for approx. 20 sec.

78

APT4000PH

Display

Action Remark

Enter measured temperature
value.
Select with key,
edit number with key,
proceed with ENTER
End adjustment with ENTER.
Hold will be deactivated after
20 sec.

Temperature probe adjustment

Activate calibration
(Press CAL,
enter 1015)
Select with key,
edit number with key,
proceed with ENTER

Measure the temperature of the
process medium using an external
thermometer

Wrong settings change
the measurement
properties! If an invalid
code is entered, the
APT4000PH returns to
measuring mode.

Default:
Current value of sec­ondary display.

APT4000PH is in Hold
mode.

Display

Remark

Measurement

In the measuring mode the main display shows the config­ured process variable (pH or ORP [mV]),
the secondary display shows the temperature.
During calibration you can return to measuring mode by
pressing the CAL, during configuration by pressing CONF.
(Waiting time for measured value stabilization approx.
20 sec).

79

Display of output currents

Press ENTER while in measuring mode.
The current at output 1 is shown in the main display, the
current at output 2 in the secondary display.
After 5 sec the APT4000PH returns to measuring mode.

Diagnostics functions

Display

Remark

Display of calibration data (Cal Info)

Press CAL while in measuring mode and enter code 0000.
The slope is shown in the main display, the asymmetry
potential in the secondary display.
After 20 sec the APT4000PH returns to measuring mode
(immediate return at pressing CAL).

Display of electrode potential

(Sensor monitor)

Press CONF while in measuring mode and enter code

2222. The (uncompensated) electrode potential is shown in

the main display, the measuring temperature in the sec­ondary display.
Press ENTER to return to measurement.

Display of last error message

(Error Info)

Press CONF while in measuring mode and enter
code 0000. The last error message is displayed for
approx. 20 sec.
After that the message will be deleted.
(immediate return to measurement at pressing ENTER).

APT4000PH

80

Relay test (manual test of contacts)

• Press CONF, enter code 5557
The relays are frozen. This state is indicated in the display.
The 4 digits in the display correspond to the 4 relays (as on
terminal plate):
1st digit: R1
2nd digit: R2
3rd digit: AL
4th digit: CLN
Function test using arrow keys – see left column.
When exiting the function (ENTER), the relays are set corre­sponding to the measured value.

Select a relay

Specify current at output 1

• Press CONF, enter code 5555
The current indicated in the main display for output 1 can
be edited.
Select with key,
edit number with key,
proceed with ENTER
The actually measured current is shown in the secondary
display. The APT4000PH is in Hold mode.
Press ENTER to return to measurement (Hold remains
active for another 20 sec).

Diagnostics functions

These functions are used for testing the connected peripherals.

Display

Action / Remarks

Specify current at output 2

• Press CONF, enter code 5556
The current indicated in the main display for output 2 can
be edited.
Select with key,
edit number with key,
proceed with ENTER
The actually measured current is shown in the secondary
display. The APT4000PH is in Hold mode.
Press ENTER to return to measurement.

Test 0/1

Return to
measurement

81

The arrows indi­cate which relay
(valve) is active:

Controller
characteristic

+100 %

-100 %

Relay 2 active
(Meas. value >
setpoint)

Relay 1 active
(Meas. value <
setpoint)

Setpoint

Controller output

Momentary controller output (adjusted value has not been
stored yet)

Controller test (manual specification of controller
output)

• Press CONF, enter code 5559

After function activation “Ctrl” is displayed for approx.
3 sec.
With controller turned off, “OFF” is displayed in addition,
then return to measuring mode.
The function is used to start up control loops or check the
actuators.
For bumpless changeover to automatic operation
(exiting this function), configure an I-action component
(reset time).

Specify value:
Select with key,
edit number with key,
proceed with ENTER

APT4000PH is in Hold mode.
Press ENTER to return to measurement
(Hold remains active for another 20 sec).

Controller output -100 to 0 %: Relay 2 active

Controller output 0 to +100 %: Relay 1 active

Display

Action / Remarks

82

APT4000PH

P controller

Application in integrating systems
(e.g. closed tank, batch processes).

PI controller

Application in non-integrating systems
(e.g. drains).

PID controller

The additional derivative action compensates for measurement
peaks.

Controller characteristic

Controller functions

PID controller

Setpoint

Controller output Y

P

[%]

+100 %

-100 %

[pH]

Neutral zone Y

P

=0

83

Controller equations

Controller output Y = YP+ YPdt + T

D

I action

D action

dY

P

dt

1

T

R

P-action

Proportional action Y

P

Setpoint - Meas. value

Constant

YP=

*

K

C

with:
Y

P

Proportional action

T

R

Reset time [s]

T

D

Rate time [s]

K

C

Controller gain [%]

Constant 5 (for pH)

500 mV (for ORP)

100 %

50 %

X

w

(Process variables: pH / (mV))

Controller

output Y

KC= 500

%

KC= 200 %

KC= 100 %

KC= 50 %

1 / (100) 2 / (200)

3 / (300)

4 / (400)

5 / (500)

Proportional action (Gradient KC[%])

Deviation

Neutral zone (Y=0)

Tolerated deviation from setpoint.
The setting “1pH”, for example, permits a deviation of ± 0.5 pH
from the desired value without activating the controller.

84

APT4000PH

Controller functions

Pulse length / pulse frequency controller

Pulse length controller (PLC)

The pulse length controller is used to operate a valve as an
actuator. It switches the contact on for a time that depends on
the controller output. The period is constant. A minimum ON
time of 0.5 sec is maintained even if the controller output takes
corresponding values.

Pulse frequency controller (PFC)

The pulse frequency controller is used to operate a frequency­controlled actuator. It varies the frequency with which the con­tacts are switched on. The maximum pulse frequency [pulses/
min] can be defined. It depends on the actuator.
The Contact ON time is constant. It is automatically calculated
from the user-defined maximum pulse frequency:

Output signal (switching contact) of pulse frequency controller

ON time

Pulse frequency (Y = 20%)

1
0

1

0

Pulse frequency (Y = 80%)

Output signal (switching contact) of pulse length controller

ON time (Y = 80 %)

ON time (Y = 20 %)

Pulse length

1
0

1
0

85

Operation with automatic cleaning system

The APT4000PH allows connection of an automatic cleaning
system. The cleaning cycle is activated according to the clean­ing interval defined during configuration (Pg 59).

17

18

Wash

e.g. splash cleaning

Power supply

17

18

Wash

7

8

Control

-

+

Automatic
cleaning
system

Connecting a rinsing system

The “Wash” contact can be used to connect a simple splash
cleaning system. Rinse time and rinsing interval are defined
during configuration (Pg 58).

86

APT4000PH

Alarm contact

Red LED

Out 1 (22 mA)

Out 2 (22 mA)

Error messages (Error Codes)

pH electrode

• Electrode defective

• Too little electrolyte in electrode

• Electrode not connected

• Break in electrode cable

• Incorrect electrode connected

• Measured pH value < -2 or > 16

• Measured pH value
< -1999 mV or > 1999 mV

Error

Display

Problem
Possible causes

ERR 01

Measured
value
flashes

x

xx

Redox electrode

• Electrode defective

• Electrode not connected

• Break in electrode cable

• Incorrect electrode connected

• Electrode potential < -1500 mV

• Electrode potential > 1500 mV

ERR 02

Measured
value
flashes

x

xx

System error

Configuration or calibration data
defective; completely reconfigure and
recalibrate the analyzer.
Memory error in device program

ERR 98

“Conf”
flashes

x

xx

x

Factory settings

EEPROM or RAM defective
This error message only occurs in the
case of a complete defect. The analyz­er must be repaired and recalibrated
at the factory.

ERR 99

“FAIL”
flashes

x

xx

x

Sensocheck: Glass electrode

Reference electrode

87

Alarm contact

Red LED

Out 1 (22 mA)

Out 2 (22 mA)

Current output 1

Current below 0 (3.8) mA

Error

Symbol
(flash­ing)

Problem
Possible causes

ERR 11

x

xx

Temperature probe

Open or short circuit
Temperature range exceeded

ERR 03

x

xx

x

Current output 1

Current above 20.5 mA

ERR 12

x

xx

Current output 1

Current span too small / too large

ERR 13

x

xx

Current output 2

Current below 0 (3.8) mA

ERR 21

x

xx

Current output 2

Current above 20.5 mA

ERR 22

x

xx

Current output 2

Current span too small / too large

ERR 23

x

xx

Rinsing probe: Communication

Calibration error

ERR 41
ERR 42

x

xx

ERR 33

x

xx

x

ERR 34

• Zero error, Sensoface active, see Pg 92

• Slope error, Sensoface active, see Pg 92

• Response time exceeded, Sensoface active, see Pg 92

• Cal interval expired, Sensoface active, see Pg 92

88

APT4000PH

Calibration error messages

Asymmetry potential out of range (±60 mV)

• Electrode worn out

• Buffer solution contaminated

• Buffer does not belong to configured buffer set

• Temperature probe not immersed in buffer
solution (for automatic temperature compensation)

• Wrong buffer temperature selected
(for manual temperature specification)

• Nominal electrode zero point ≠ pH 7

Symbol flashes:

Problem
Possible causes

Problems during recognition
of the buffer solution

• Same or similar buffer solution was used

for both calibration steps

• Buffer solution used does not belong to

buffer set currently configured in the analyzer

Electrode slope out of range
(80-103 %)

• Electrode worn out

• Buffer solution contaminated

• Buffer does not belong to configured
buffer set

• Temperature probe not immersed in
buffer solution (for automatic
temperature compensation)

• Wrong buffer temperature set (for manual
temperature specification)

• Electrode used has different nominal slope

89

Problems during recognition
of the buffer solution (continued)

• During manual calibration the buffer solutions
were not used in the specified order

• Buffer solutions contaminated

• Wrong buffer temperature set
(for manual temperature specification)

• Electrode defective

• Electrode not connected

• Electrode cable defective

Symbol flashes:

Problem
Possible causes

Calibration was canceled after approx.
2 min, because the electrode drift was too
large.

• Electrode defective

• Electrode dirty

• No electrolyte in the electrode

• Electrode cable insufficiently shielded or defective

• Strong electric fields influence the measurement

• Major temperature fluctuation of the buffer solution

• No buffer solution or extremely diluted

APT4000PH

90

Alarm contact

Wash contact

LED

Time out

Operating
state

Measurement

Operating states

Rel.1/2

Controller

Rel.1/2

Limit value

Out 2

Out 1

Cal Info
(CAL) 0000

20
s

Error Info
(CONF) 0000

20
s

Calibration
(CAL) 1100

Temp adjustment
(CAL) 1015

91

Product cal 1
(CAL) 1105

Product cal 2
(CAL) 1105

Configuration
(CONF) 1200

20
min

Parameter set 1/2
(CONF) 7654

20
min

Sensor monitor
(CONF) 2222

20
min

Current source 1
(CONF) 5555

20
min

Current source 2
(CONF) 5556

20
min

Relay test
(CONF) 5557

20
min

Manual controller
(CONF) 5559

20
min

Rinsing function

Hold input

Alarm contact

Wash contact

LED

Time out

Operating
state

Rel.1/2

Controller

Rel.1/2

Limit value

Out 2

Out 1

Explanation:

active

as configured (LAST/Fix or LAST/Off)

92

APT4000PH

Sensocheck

Continuously monitors the electrodes and wires for short cir­cuits or open circuits. Critical values make the Sensoface “sad”
and the corresponding icon flashes:

The Sensocheck message is also output as error message Err

33. The alarm contact is active, the red LED is lighted, output
current 1 is set to 22 mA (when configured correspondingly).
Sensocheck can be switched off during configuration (then
Sensoface is also disabled). Exception: After calibration a Smiley
is always displayed for confirmation.

Sensoface

(Sensocheck must have been activated during configuration.)

The little smiley in the display (Sensoface) alerts for electrode
problems (defective sensor, defective cable, maintenance
required). The permitted calibration ranges and the conditions
for a friendly, neutral, or sad Sensoface are summarized in the
following chart. Additional icons refer to the error cause.

Note

The worsening of a Sensoface criterion leads to the devaluation
of the Sensoface indicator (Smiley becomes “sad”). An
improvement of the Sensoface indicator can only take place
after calibration or removal of an electrode defect.

93

Status

Display

Problem

Asymmetry
potential and
slope

Asymmetry potential (zero) and slope of
the electrode are still okay.
However, the electrode should be
replaced soon.

Asymmetry potential (zero point)
and/or slope of the electrode have
reached values which no longer ensure
proper calibration.
Replace the electrode.

Calibration timer

Over 80 % of the calibration interval
has already past.

The calibration interval has been
exceeded.

Electrode
defective

Check the electrode and its connections
(also see error messages
Err 33 and Err 34, Page 87).

94

APT4000PH

Appendix

Product line and accessories

Devices Order No.

pH/ORP Analyzer APT4000PH

Mounting accessories

Pipe-mount kit 51205988-001
Panel-mount kit 51205990-001
Protective hood 51205989-001

95

pH/mV input Input for pH or ORP electrodes or DURAFET II

Measurement range -1500 to +1500 mV
Display range pH value -2.00 to 16.00

ORP -1999 to +1999 mV

Glass electrode input

1

)

Input resistance > 0.5 x 1012Ohms
Input current < 2 x 10

-12

A

Reference electrode input

1

)

Input resistance > 1 x 1010Ohms
Input current < 1 x 10

-10

A

Meas. error

1,2,3)

pH value < 0.02 TC: 0.002 pH/K (display)
mV value < 1 mV TC: 0.1 mV/K

Electrode standardization pH

*)

pH calibration

Operating modes

BUF
Buffer sets Calimatic calibration with automatic

buffer recognition:

-01- Mettler-Toledo

2.00/4.01/7.00/9.21

-02- Merck/Riedel de Haen

2.00/4.00/7.00/9.00/12.00

-03- Ciba (94)

2.06/4.00/7.00/10.00

-04- NIST technical

1.68/4.00/7.00/10.01/12.46

-05- NIST standard

1.679/4.006/6.865/9.180

-06- HACH

4.00/7.00/10.18

-07- WTW technical buffers

2.00/4.01/7.00/10.00

MAN Calibration with manual entry of individual

buffer values

DAT Data entry of premeasured electrodes

Specifications

96

APT4000PH

Zero adjustment ±200 mV
Max. calibration range Asymmetry potential: ±60 mV

Slope: 80 to 103 % (47.5 to 61 mV/pH)

Sensor standardization ORP

*)

ORP calibration

Max. calibration range -700 to +700 ∆mV

Cal timer 0000 to 9999 h

Sensocheck Automatic monitoring of glass and

reference electrode (can be disabled)

Sensoface provides information on the electrode

condition.
Evaluation of zero/slope, response,
calibration interval, Sensocheck

Temperature input

*)

Pt100 / Pt1000 / NTC 30 kOhms /
NTC 8.55 kOhms
2-wire connection, adjustable

Measurement range Pt 100/Pt 1000: -20.0 to +200.0 °C

(-4 to +392 °F)

NTC 30 kOhms -20.0 to +150.0 °C

(-4 to +302 °F)

NTC 8.55 kOhms -10.0 to +130.0 °C

(+14 to +266 °F)

Adjustment range 10 K
Resolution 0.1 °C / 1 °F
Meas. error

1,2,3

< 0.5 K (< 1 K for Pt100; <1K for NTC >100°C)

Temp compensation Linear –19.99 to +19.99 %/K
of process medium (reference temp 25 °C)

Hold input Galv. separated (OPTO coupler)

Function Switches analyzer to Hold mode
Switching voltage 0 to 2 V (AC/DC) inactive

10 to 30 V (AC/DC) active

Specifications

97

CONTROL input Galv. separated (OPTO coupler)
Function Control input for automatic cleaning/

calibration system

Switching voltage 0 to 2 V (AC/DC) inactive

10 to 30 V (AC/DC) active

Output 1 0/4 to 20 mA, max. 10 V, floating

(galv. connected to output 2)

Measured variable

*)

pH or mV value

Overrange

*)

22 mA in the case of error messages

Output filter

*)

Low-pass, filter time constant 0 to 120 s

Meas. error

1

)

< 0.3 % current value + 0.05 mA

Start/end of scale As desired within range

for pH or mV

Adm. span pH 2.00 to 18.00 / 200 to 3000 mV

Output 2 0/4 to 20 mA, max. 10 V, floating

(galv. connected to output 1)
Process variable Temperature
Overrange

*)

22 mA in the case of temp error messages
Output filter

*)

Low-pass, filter time constant 0 to 120 s

Meas. error

1

)

< 0.3 % current value + 0.05 mA
Start/end of scale

*)

20 to 200 °C / -4 to 392 °F
Adm. span 20 to 220 K (36 to 396 °F)

Power output for operating an ISFET adapter

+3 V (V

0

= 2.9 to 3.1 V / Ri= 360 Ω

–3 V (V

0

= -4.8 to –3.7 V / Ri= 360 Ω

Alarm contact Relay contact, floating
Contact ratings AC< 250 V / < 3 A / < 750 VA

DC< 30 V / < 3 A / < 90 W
Contact response N/C (fail-safe type)
Alarm delay 0000 to 0600 s

98

APT4000PH

Specifications

Limit values Output via relay contacts R1, R2

Contacts R1, R2 floating, but inter-connected

Contact ratings AC< 250 V / < 3 A / < 750 VA

DC< 30 V / < 3 A / < 90 W

Contact response

*)

N/C or N/O

Delay

*)

0000 to 9999 s

Switching points

*)

As desired within range

Hysteresis

*)

00.00 to 05.00 pH units / 0000 to 0500 mV

PID process controller Output via relay contacts R1, R2 (see limit values)

(Relay R1 base valve, relay R2 acid valve)

Setpoint specification

*)

pH -02.00 to 16.00 / -1500 to +1500 mV

Neutral zone

*)

pH 00.00 to 05.00 / 0000 to 0500 mV

P-action

*)

Controller gain Kc: 0010 to 9999 %

I-action component

*)

Reset time Tr: 0000 to 9999 s
(0000 s = no integral action)

D-action component

*)

Rate time Td: 0000 to 9999 s
(0000 s = no derivative action)

Controller type

*)

Pulse length controller or
pulse frequency controller

Pulse period

*)

0001 to 0600 s, min. ON time 0.5 s
(pulse length controller)

Max. pulse frequency

*)

0001 to 0180 min

-1

(Pulse frequency controller)

Cleaning function

*)

Relay contact, floating
for controlling a simple rinsing system or
an automatic cleaning system

Contact ratings AC< 250 V / < 3 A / < 750 VA

DC< 30 V / < 3 A / < 90 W

Contact response

*)

N/C or N/O

Rinsing interval

*)

000.0 to 999.9 h
(000.0 h = cleaning function switched off)

Cleaning time

*)

0000 to 1999 s

Calibration interval

*)

000.0 to 999.9 h

Cleaning interval

*)

000.0 to 999.9 h

99

Display LC display, 7-segment with icons
Main display Character height 17 mm, unit symbols 10 mm
Secondary display Character height 10 mm, unit symbols 7 mm
Sensoface 3 status indicators (friendly, neutral, sad Smiley)
Mode indicators 5 status bars:

“MEAS”, “CAL”, “ALARM”, “WASH”, “CONF”
18 further icons for configuration and messages

Alarm indication Red LED in case of alarm or Hold, user defined

Keypad 5 keys: [CAL] [CONF] [ ] [ ] [ENTER]

Service functions

Current source Current specifiable for output 1 and 2

(00.00 to 22.00mA)

Manual controller Controller output entered directly

(start of control process)
Device self-test Automatic memory test (RAM, FLASH, EEPROM)
Display test Display of all segments
Last Error Display of last error occurred
Sensor monitor Display of direct, uncorrected sensor signal

(electrode)
Relay test Manual control of the four switching contacts

Parameter sets

*)

Two selectable parameter sets

for different applications

Data retention Parameters and calibration data > 10 years

(EEPROM)

100

APT4000PH

Specifications

Protection against Protective separation of all extra-low-voltage circuits against
electrical shock mains by double insulation as per EN 61010-1

Power supply 24 (-15%) to 230 V AC/DC (+10%); approx. 5 VA, 2.5 W

AC: 45 to 65 Hz; Overvoltage category II, Class II

Nominal operating conditions

Ambient temperature -20 to +55 °C
Transport/Storage temp -20 to +70 °C
Relative humidity 10 to 95 % not condensing
Power supply 24 (-15%) to 230 V AC/DC (+10%)
Frequency for AC 45 to 65 Hz

EMC EN 61326
Emitted interference Class B (residential environment)

Class A for mains supply > 60 V DC

Immunity to
interference Industrial environment

Explosion protection
FM: NI Class I Div 2 Group A, B, C & D, T4 Ta = 55 °C; Type 2

NI Class I Zone 2 Group IIC, T4 Ta = 55°C; Type 2

Enclosure molded enclosure made of PBT (polybutylene terephtalate)
Color Bluish gray RAL 7031
Assembly • Wall mounting

• Pipe mounting: dia 40 to 60 mm, 30 to 45 mm

• Panel mounting, cutout to DIN 43 700
Sealed against panel

Dimensions H 144 mm, B 144 mm, T 105 mm
Ingress protection IP 65 / NEMA 4X
Cable glands 3 breakthroughs for cable glands M20x1.5

2 breakthroughs for NPT 1/2 “ or Rigid Metallic Conduit

Weight Approx. 1 kg

*) User-defined

1

) To IEC 746 Part 1, at nominal operating conditions

2

) ± 1 count

3

) Plus sensor error

101

Buffer tables

-01- Mettler-Toledo technical buffers

°C pH

0

5
10
15
20

25

30
35
40
45
50
55
60
65
70
75
80
85
90
95

2.03

2.02

2.01

2.00

2.00

2.00

1.99

1.99

1.98

1.98

1.98

1.98

1.98

1.99

1.99

2.00

2.00

2.00

2.00

2.00

4.01

4.01

4.00

4.00

4.00

4.01

4.01

4.02

4.03

4.04

4.06

4.08

4.10

4.13

4.16

4.19

4.22

4.26

4.30

4.35

7.12

7.09

7.06

7.04

7.02

7.00

6.99

6.98

6.97

6.97

6.97

6.98

6.98

6.99

7.00

7.02

7.04

7.06

7.09

7.12

9.52

9.45

9.38

9.32

9.26

9.21

9.16

9.11

9.06

9.03

8.99

8.96

8.93

8.90

8.88

8.85

8.83

8.81

8.79

8.77

102

APT4000PH

-02- Merck Titrisols, Riedel Fixanals

°C pH

0

5
10
15

20

25
30
35
40
45
50
55
60
65
70
75
80
85
90
95

2.01

2.01

2.01

2.00

2.00

2.00

2.00

2.00

2.00

2.00

2.00

2.00

2.00

2.00

2.01

2.01

2.01

2.01

2.01

2.01

4.05

4.04

4.02

4.01

4.00

4.01

4.01

4.01

4.01

4.01

4.00

4.00

4.00

4.00

4.00

4.00

4.00

4.00

4.00

4.00

7.13

7.07

7.05

7.02

7.00

6.98

6.98

6.96

6.95

6.95

6.95

6.95

6.96

6.96

6.96

6.96

6.97

6.98

7.00

7.02

9.24

9.16

9.11

9.05

9.00

8.95

8.91

8.88

8.85

8.82

8.79

8.76

8.73

8.72

8.70

8.68

8.66

8.65

8.64

8.64

12.58

12.41

12.26

12.10

12.00

11.88

11.72

11.67

11.54

11.44

11.33

11.19

11.04

10.97

10.90

10.80

10.70

10.59

10.48

10.37

Buffer tables

103

-03- Ciba (94) buffers

Nominal values: 2.06, 4.00, 7.00, 10.00

°C pH

0

5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95

2.04

2.09

2.07

2.08

2.09

2.08

2.06

2.06

2.07

2.06

2.06

2.05

2.08

2.07

2.07

2.04

2.02

2.03

2.04

2.05

4.00

4.02

4.00

4.00

4.01

4.02

4.00

4.01

4.02

4.03

4.04

4.05

4.10

4.10

4.11

4.13

4.15

4.17

4.20

4.22

7.10

7.08

7.05

7.02

6.98

6.98

6.96

6.95

6.94

6.93

6.93

6.91

6.93

6.92

6.92

6.92

6.93

6.95

6.97

6.99

10.30

10.21

10.14

10.06

9.99

9.95

9.89

9.85

9.81

9.77

9.73

9.68

9.66

9.61

9.57

9.54

9.52

9.47

9.43

9.38

* Extrapolated

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

104

APT4000PH

Buffer tables

-04- Technical buffers to NIST

°C pH

0

5
10
15
20

25

30
35
40
45
50
55
60
65
70
75
80
85
90
95

1.67

1.67

1.67

1.67

1.675

1.68

1.68

1.69

1.69

1.70

1.70

5

1.715

1.72

1.73

1.74

1.75

1.76

5

1.78

1.79

1.80

5

4.00

4.00

4.00

4.00

4.00

4.005

4.015

4.025

4.03

4.045

4.06

4.075

4.085

4.10

4.13

4.14

4.16

4.18

4.21

4.23

7.115

7.085

7.06

7.04

7.015

7.00

6.98

5

6.98

6.975

6.975

6.97

6.97

6.97

6.98

6.99

7.01

7.03

7.05

7.08

7.11

10.32

10.25

10.18

10.12

10.06

10.01

9.97

9.93

9.89

9.86

9.83

9.83

9.83

9.83

9.83

9.83

9.83

9.83

9.83

9.83

13.42

13.21

13.01

12.80

12.64

12.46

12.30

12.13

11.99

11.84

11.71

11.57

11.45

11.45

11.45

11.45

11.45

11.45

11.45

11.45

*
*
*
*
*
*
*
*
*

*
*
*
*
*
*
*

* Extrapolated

105

-05- NIST standard buffers

°C pH

0

5
10
15
20

25

30
35
40
45
50
55
60
65
70
75
80
85
90
95

4.010

4.004

4.000

3.999

4.001

4.006

4.012

4.021

4.031

4.043

4.057

4.071

4.087

4.109

4.126

4.145

4.164

4.185

4.205

4.227

6.984

6.951

6.923

6.900

6.881

6.865

6.853

6.844

6.838

6.834

6.833

6.834

6.836

6.841

6.845

6.852

6.859

6.868

6.877

6.886

9.464

9.395

9.332

9.276

9.225

9.180

9.139

9.102

9.068

9.038

9.011

8.985

8.962

8.942

8.921

8.903

8.885

8.868

8.850

8.833

1.666

1.668

1.670

1.672

1.675

1.679

1.683

1.688

1.694

1.700

1.707

1.715

1.723

1.733

1.743

1.755

1.766

1.779

1.792

1.806

106

APT4000PH

-06- HACH buffers
Nominal value: 4.00, 7.00, 10.18

°C pH

0

5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95

4.00

4.00

4.00

4.00

4.00

4.01

4.01

4.02

4.03

4.05

4.06

4.07

4.09

4.09

4.09

4.09

4.09

4.09

4.09

4.09

7.14

7.10

7.04

7.04

7.02

7.00

6.99

6.98

6.98

6.98

6.98

6.98

6.99

6.99

6.99

6.99

6.99

6.99

6.99

6.99

10.30

10.23

10.11

10.11

10.05

10.00

9.96

9.92

9.88

9.85

9.82

9.79

9.76

9.76

9.76

9.76

9.76

9.76

9.76

9.76

*
*
*
*
*
*
*

* Values complemented

Buffer values up to 60 °C as specified by Bergmann & Beving
Process AB.

*
*
*
*
*
*
*

*
*
*
*
*
*
*

Buffer tables

107

-07- WTW buffers

°C pH

0

5
10
15
20

25

30
35
40
45
50
55
60
65
70
75
80
85
90
95

2.03

2.02

2.01

2.00

2.00

2.00

1.99

1.99

1.98

1.98

1.98

1.98

1.98

1.99

2.00

2.00

2.00

2.00

2.00

2.00

4.01

4.01

4.00

4.00

4.00

4.01

4.01

4.02

4.03

4.04

4.06

4.08

4.10

4.13

4.16

4.19

4.22

4.26

4.30

4.35

7.12

7.09

7.06

7.04

7.02

7.00

6.99

6.98

6.97

6.97

6.97

6.98

6.98

6.99

7.00

7.02

7.04

7.06

7.09

7.12

10.65

10.52

10.39

10.26

10.13

10.00

9.87

9.74

9.61

9.48

9.35

108

APT4000PH

Asymmetry
potential

Glossary

The voltage which a pH electrode provides
at a pH of 7. The asymmetry potential is
different for each electrode and changes
with age and wear.

Calimatic

Automatic buffer recognition. Before the
first calibration, the buffer set used must
be activated once. The patented Calimatic
then automatically recognizes the buffer
solutions used during calibration.

Combination
electrode

Combination of glass and reference elec­trode in one body.

Calibration

Adjustment of the pH meter to the current
electrode characteristics. The asymmetry
potential and slope are adjusted.
You can conduct either a one or a two­point calibration. With one-point calibra­tion only the asymmetry potential (zero
point) is adjusted.

Buffer solu­tion

Solution with an exactly defined pH value
for calibrating a pH meter.

Buffer set

Contains selected buffer solutions which
can be used for automatic calibration with
the Calimatic. The buffer set must be
selected prior to the first calibration.

109

DURAFET

DURAFET combination pH/ORP electrodes
consist of an ISFET measuring electrode, a
reference electrode, and a temperature
probe.

DURAFET
cap adapter

Adapter integrated in the protective cap of
the DURAFET electrode. Here, the signal of
the pH-sensitive FET is converted to volt­age corresponding to the signal of a glass
electrode. This voltage is led to the pH
input of the analyzer and is processed fur­ther as usual. The adapter is directly sup­plied from the analyzer.

GainCheck

Device self-test which runs automatically in
the background at fixed intervals. The
memory and measured-value transmission
are checked. You can also start the
GainCheck manually. Then a display test is
also conducted and the software version
displayed.

Electrode
zero point

See asymmetry potential

Electrode
slope

Is indicated in % of the theoretical slope
(59.2 mV/pH at 25 °C). The electrode
slope is different for every electrode and
changes with age and wear.

110

APT4000PH

pH electrode
system

Glossary

A pH electrode system consists of a glass
and a reference electrode. If they are com­bined in one body, they are referred to as
combination electrode.

Sensocheck

Sensocheck continuously monitors the glass
and reference electrodes. The resulting
information is indicated by the Sensoface
smileys. Sensocheck can be switched off.

Response time

Time from the start of a calibration step to
the stabilization of the electrode potential.

One-point
calibration

Calibration with which only the asymmetry
potential (zero point) is taken into account.
The previous slope value is retained. Only
one buffer solution is required for a one­point calibration.

Mode code

Preset four-digit number to select certain
modes.

MEREDIAN

MEREDIAN combination pH/ORP electrodes
consist of a glass or metallic measuring
electrode, a reference electrode, and a tem­perature probe. They include a permanent
reference junction and gel fill for mainte­nance-free operation.

111

Zero point

See asymmetry potential

Zero
adjustment

Basic adjustment of the DURAFET electrode
to ensure reliable Sensoface information.

Sensoface

Provides information on the electrode con­dition. The zero point, slope, and response
time are evaluated. In addition, the
Sensocheck information is indicated.

Slope

See Electrode slope

Two-point
calibration

Calibration with which the electrode asym­metry potential (zero point) and slope are
determined. Two buffer solutions are
required for two-point calibration.

22 mA signal for error message . . . . . . . . . . . 39, 45, 50, 86

Alarm settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Alarm contact . . . . . . . . . . . . . . . . . . . . . . . . . . 50, 86, 97

Alarm delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Automatic cleaning system . . . . . . . . . . . . . . . . . . . . . . . . 85

Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

Buffer tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Cal Info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Automatic calibration . . . . . . . . . . . . . . . . . . . . . . . . . .68

Data entry of premeasured electrodes . . . . . . . . . . . . .72

Error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

Manual calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

ORP calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

Product calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

Calibration probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Calimatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Configuration steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Configuration: Alarm settings . . . . . . . . . . . . . . . . . . . . . . 50

Configuration: Calibration mode . . . . . . . . . . . . . . . . . . . 48

Select calibration mode . . . . . . . . . . . . . . . . . . . . . . . .49

Configuration: Controller . . . . . . . . . . . . . . . . . . . . . . . . . 56

Configuration: Output 1 . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Current range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Measurement procedure . . . . . . . . . . . . . . . . . . . . . . .32

Output current during Error . . . . . . . . . . . . . . . . . . . . .38

Output signal during Hold . . . . . . . . . . . . . . . . . . . . . .39

Select electrode type . . . . . . . . . . . . . . . . . . . . . . . . . .32

Time constant of output filter . . . . . . . . . . . . . . . . . . .36

Configuration: Output 2 . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Current range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

112

APT4000PH

Index

Output current during Hold . . . . . . . . . . . . . . . . . . . . .44

Temperature error . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Temperature probe . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Temperature unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Time constant of output filter . . . . . . . . . . . . . . . . . . .42

Configuration: Relay 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Configuration: Relay 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Configuration: Rinsing and calibration probes . . . . . . . . . . 58

Lock cleaning (calibration) . . . . . . . . . . . . . . . . . . . . . .59

Configuration: Temperature compensation . . . . . . . . . . . . 46

Temp detection during measurement . . . . . . . . . . . . . .47

Temperature compensation of process medium . . . . . .47

Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

Controller equations . . . . . . . . . . . . . . . . . . . . . . . . . . .83

Controller test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81

Current source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Diagnostics functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Controller test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81

Display of calibration data . . . . . . . . . . . . . . . . . . . . . .79

Display of electrode potential . . . . . . . . . . . . . . . . . . . .79

Display of last error messages . . . . . . . . . . . . . . . . . . . .79

Display of output currents . . . . . . . . . . . . . . . . . . . . . .79

Relay test (manual test of contacts) . . . . . . . . . . . . . . .80

Specify current at output 1/ 2 . . . . . . . . . . . . . . . . . . .80

Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

DURAFET electrode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Zero adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

Err . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

113

Error info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Hold mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

External activation . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

LED in Hold mode . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

ISFET electrode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33, 65

Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Limit function (LiMIT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

MEREDIAN electrode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Mounting plan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Operating states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

ORP measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Typical wirings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Output current range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Output filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37, 43

Output signal for Hold . . . . . . . . . . . . . . . . . . . . . . . . 39, 45

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Package contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Panel mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Panel-mount kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11, 94

Parameter set - user settings . . . . . . . . . . . . . . . . . . . . . . . 62

Parameter set 1/2 (Defaults) . . . . . . . . . . . . . . . . . . . . . . . 60

pH calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

PID controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Pipe mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Pipe-mount kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10, 94

Product calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

114

APT4000PH

Product line and accessories . . . . . . . . . . . . . . . . . . . . . . . 94

Protective hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10, 94

Protective wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Pulse frequency controller (PFC) . . . . . . . . . . . . . . . . . . . . 84

Pulse length controller (PLC) . . . . . . . . . . . . . . . . . . . . . . . 84

Relay 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Relay 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Relay test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Rinsing system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

Safety functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Division 2 wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Self test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Sensocheck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51, 92

Sensoface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Sensor monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Temperature compensation . . . . . . . . . . . . . . . . . . . . . . . . 46

Temperature probe adjustment . . . . . . . . . . . . . . . . . . . . . 78

Temperature probe selection . . . . . . . . . . . . . . . . . . . . . . . 40

Terminal assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Time constant output filter . . . . . . . . . . . . . . . . . . . . . 37, 43

Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

User interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Wiring examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

DURAFET II electrode . . . . . . . . . . . . . . . . . . . . . . . . . .16

MEREDIAN electrode . . . . . . . . . . . . . . . . . . . . . . . . . .17

ORP measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

pH measurement, general . . . . . . . . . . . . . . . . . . . . . .14

Zero adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

115

Mode codes

The mode codes allow fast access to the functions.

Calibration

TA-194.130-HWE01 110903

Key + Code

Description

Cal Info

Display of asymmetry potential and slope

0000

Zero adjustment

of a nominal zero point

1001

Product calibration

Adjustment of asymmetry potential (product)

1105

Adjusting temp probe

1015

Configuration

Error Info Display last error and erase

0000

Configuring

Sensor monitor

Display of uncorrected electrode potential (mV)

Parameter set 1/2 Selecting parameter set

1200

2222

7654

Key + Code

Description

Calibration

Adjustment of asymmetry potential and slope (electrode)

1100

5555

5556

5557

5559

Current source 1 Output current 1 specified

Current source 2 Output current 2 specified

Relay test Manual test of contacts

Manual controller

Manual specification of controller output

Software version: 1.0