JUMO AQUIS 500 CR User Manual

JUMO GmbH & Co. KG

Delivery address: Mackenrodtstraße 14

36039 Fulda, Germany

Postal address:

36035 Fulda, Germany
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Internet: www.jumo.net

JUMO Instrument Co. Ltd.

JUMO House
Temple Bank, Riverway
Harlow, Essex CM20 2DY, UK
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Internet: www.jumo.co.uk

JUMO Process Control, Inc.

6733 Myers Road
East Syracuse, NY 13057, USA
Phone: [phone]

1-800-554-5866
Fax: [phone]
Email: [e-mail]
Internet: www.jumousa.com

JUMO AQUIS 500 CR

Transmitter/controller

2 analog inputs

Input 1:
Conductivity / resistivity

1 binary input

For floating contact
Functions:

- key inhibit

- alarm stop

- HOLD

Supply voltage

110—240 V AC
12—24 V DC
20—30 V AC/DC

Analog outputs (option)

Output 1 + 2:
0(4)—20 mA or 0—10 V

option

Setup interface

Switching outputs (option)

Outputs 3 + 4:

- relay, changeover (SPDT)

User-friendly configuration
Reloading of languages
Plant documentation

Configurable as analog process
value output and/or continuous
controller output (PID action)

Configurable as

- limit controller

- pulse width output
(PID action)

- pulse frequency output
(PID action)

- modulating controller
(PID action)

- USP contact

- "Purified water" contact
as per Ph.Eur.

- calibration timer run down

standard

Input 2:
Temperature
manual input or automatic
Pt100 / Pt1000 / 4 kΩ

Transmitter/Controller
for conductivity, TDS, resistivity
and temperature

Brief description

The instrument is used for the conductive measurement/control of electrolytic conductivity,
resistivity or the TDS value. In addition, the JUMO AQUIS 500 CR also offers the possibility of
showing the measured conductivity according to a customer-specific table.
Conductive two-electrode cells as well as four-electrode cells can be connected to the
instrument.
Temperature serves as the second input variable, measured by a Pt100/1000 probe. Depending
on the measured variable, it is therefore possible to implement specific, automatic temperature
compensation.
The instrument is operated using keys and a large LC graphics display on which the
measurements are clearly legible. The plain-text presentation of the parameters makes it easier
for the user to configure the instrument, and also helps in programming it correctly.
Thanks to its modular design, the instrument can be perfectly matched to the particular
application requirement. Up to four outputs are available (see the block diagram for the
functions).

Typical areas of application

Universally applicable in water and wastewater engineering, service/process water and
wastewater, drinking water and well/surface water, pure and high-purity water as well as for
pharmaceutical water (e.g. as per USP, Ph.Eur., WFI), water quality measurements, TDS
measurements (ppm or mg/l).

Block diagram

Approvals/approval marks (see Technical data)

V1.00/EN/00477047

Data Sheet 202565

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Key features

• Direct changeover to

- conductivity (µS/cm or mS/cm)

- resistivity (kΩ x cm or MΩ x cm)

- TDS measurement (ppm or mg/l)

- customer-specific table

• Automatic temperature compensation:
off (e.g. USP), linear, ASTM, natural water
(EN 27888/ISO 7888)

• Large LC graphics display with
background lighting

• Choice of display: large numbers, bar
graph or trend display

• Calibration options according to
measured variable: cell constant and
temperature coefficient

• Calibration logbook

• Two-electrode cells (as standard) or
four-electrode cells can be connected

• Pollution detection can be activated

• Auto-range operation

• IP67 enclosure protection
(in surface mountable housing)
IP65 enclosure protection
(for panel mounting)

• Language changeover:
German, English, French;
further languages can be loaded through
the setup program

• Using the setup program: user-friendly
programming, plant documentation,
additional languages can be loaded

Page 1/12

Type 202565

Page 2/12Data Sheet 202565

JUMO GmbH & Co. KG

Delivery address: Mackenrodtstraße 14

36039 Fulda, Germany

Postal address:

36035 Fulda, Germany
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Internet: www.jumo.net

JUMO Instrument Co. Ltd.

JUMO House
Temple Bank, Riverway
Harlow, Essex CM20 2DY, UK
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Internet: www.jumo.co.uk

JUMO Process Control, Inc.

6733 Myers Road
East Syracuse, NY 13057, USA
Phone: [phone]

1-800-554-5866
Fax: [phone]
Email: [e-mail]
Internet: www.jumousa.com

(1)

(2)

(4)

(5)

(6)

(7)

(8)

(9)

(3)

Functional description

The instrument is designed for use on site. A
rugged housing protects the electronics and
the electrical connections from corrosive
environmental conditions (IP67). As an
alternative, the instrument can also be
installed in a control panel, and is then
protected to IP65 on the front. The electrical
connection is made by easy-to-fit pluggable
screw terminals.

Transmitter

Two-electrode cells (standard) as well as four­electrode cells can be used for measurement.

Two-electrode cells can be connected, in the
usual increments for cell constants (K=0.01;

0.1; 1.0; 3.0 and 10.0). Thanks to the widely
adjustable relative cell constant, it is also
possible to connect sensors with different cell
constants (e.g. K=0.2).

In the case of the 4-electrode cells, the values
K=0.5 and 1.0 have been predefined for the
cell constant. Here too, the instrument can be
matched to sensors with different cell
constants (e.g. K=0.4).

The instrument can perform automatic
temperature compensation, by acquiring the
temperature of the sample solution.

Displays and controls

(1) Switching output 1 or 2 is active
(2) Binary input 1 is actuated
(3) Keypad is inhibited
(4) Alarm has been activated
(5) Instrument is in manual mode
(6) Instrument status
(7) Temperature of medium
(8) Principal measurement
(9) Unit of principal measurement

The user can define what is to be shown in
positions (7) and (8) of the display:

•no display

• compensated or uncompensated
measurement

•temperature

• output level 1 or 2

•setpoint 1 or 2

V1.00/EN/00477047

Operation

For easy programming and operation, all
parameters are arranged in clearly structured
levels and shown in plain text. Operation is
protected by a code word. This facilitates
individual adaptation of the operation, since
parameters can be generally enabled or
specifically assigned to the protected area.

As an alternative to configuration from the
keys, the instrument can also be configured
through the convenient setup program for PC
(option).

Display modes

Three display modes are available:

Large numbers

In this display mode, the measurements are
shown in digits, as usual.

Tre n d display

The numerical value is supplemented by a
symbol which indicates the change direction
and change speed of the measurement.
This can, for instance, be very useful during
controller optimization.

from left to right:
fast, medium and slow rise, stable,

slow, medium and fast fall.

Bar graph

This display mode allows the user to see at a
glance in which region the measurement is at
present.

The bar graph can be freely scaled.

Function modes

Electrolytic conductivity

Display/control, unit µS/cm or mS/cm.

Resistivity (high-purity water)

Display/control, unit kΩ x cm or MΩ x cm.

TDS

Display/ control with ppm for the unit.
In this mode, the specific TDS factor can be
entered in addition.

Customer-specific table

In this mode, the input value (conductivity or
resistivity) can be displayed in accordance
with a table (up to 20 value pairs). Thanks to
this function, it is possible to implement
simple concentration measurements, for
example. The values in the table can only be
entered through the optional setup program.

Calibration

Cell constant

Because of manufacturing tolerances, the cell
constant of a conductivity cell may deviate
slightly from its nominal value. In addition, the
cell constant may change during operation
(due to deposits or wear, for example). This
results in a change of the output signal from
the cell. The instrument provides the user with
the possibility of compensating any deviation
from the nominal value of the cell constant by
manual entry or automatic calibration of the
relative cell constant. A manual entry is used,
for instance, for calibration during high-purity
water measurement.

Temperature coefficient

The conductivity of almost all solutions
depends on the temperature. To ensure
correct measurement, it is therefore
necessary to know both the temperature and
the temperature coefficient [%/°C] of the
sample solution. The temperature can either
be measured automatically, with a Pt100 or
Pt1000 temperature probe, or it has to be set
manually by the user.
The temperature coefficient can be
automatically determined by the instrument,
or it can be entered manually.

Calibration logbook

The five most recent successful calibrations
can be called up in the calibration logbook.
This makes it possible to evaluate the ageing
of the sensor that is connected.

Calibration timer

The calibration timer indicates (if required)
when the next routine calibration is due. The
calibration timer is activated by entering a
number of days, after which recalibration has
to be carried out (plant or operator
requirement).

MIN / MAX value memory

This memory acquires the minimum or
maximum input variables that have occurred.
This information serves, for example, to
decide whether the sensor that is connected
is suited to the values that are actually
present.

Page 3/12Data Sheet 202565

JUMO GmbH & Co. KG

Delivery address: Mackenrodtstraße 14

36039 Fulda, Germany

Postal address:

36035 Fulda, Germany
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Internet: www.jumo.net

JUMO Instrument Co. Ltd.

JUMO House
Temple Bank, Riverway
Harlow, Essex CM20 2DY, UK
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Internet: www.jumo.co.uk

JUMO Process Control, Inc.

6733 Myers Road
East Syracuse, NY 13057, USA
Phone: [phone]

1-800-554-5866
Fax: [phone]
Email: [e-mail]
Internet: www.jumousa.com

Hysteresis

Setpoint

pH

On

Off

Limit

Hysteresis

Limit

pH

On

Off

Setpoint

Hysteresis

Setpoint

pH

On

Off

Limit

Distance

Hysteresis

Setpoint

pH

On

Off

Limit

Distance

Time

On

Off

Pulse duration

Pulse
contact

Time

On

Off

Trigger
condition

Detection of deposits

Deposit detection can be activated for 4­electrode cells.
During normal operation, it can happen that
deposits form on electrodes. This has the
result that a lower concentration is displayed
than actually present. With activated “deposit
detection” function, the instrument tells you
when the cell needs to be serviced.

Auto-range

For some processes, the availability of two
measuring ranges is advantageous, for
instance for rinsing or regeneration
processes.
What is usually required here, is the precise
acquisition of a low conductivity. Rinsing or
regeneration, however, involves a much
higher conductivity, which could lead to an
out-of-range condition (error). This situation is
not just unsatisfactory, but may even be
dangerous. Thanks to the auto-range
function, two measuring ranges can be
determined. The instrument then switches
between them in a defined manner.

Binary input

The following functions can be activated
through the binary input:

• Activate key inhibit
When this function has been activated,
operation from the keys is no longer
possible.

• Activate HOLD mode
After activating this function, the outputs
(analog and relay) adopt the states that
have previously been defined.

• Alarm suppression (controller alarm only)
This function temporarily deactivates the
alarm generation via the relay (has to be
configured accordingly).

Linking the corresponding terminals by
means of a floating contact (e. g. relay) will
activate the pre-defined function.

Control functions

The relays can have functions assigned that
are configured via parameters. The control
function is freely programmable as P, PI, PD or
PID action.

Relay outputs

Two relay changeover contacts are available
for the principle measurement variable and/or
temperature.
The following functions can be programmed:

• Switching direction
(min/max)

• Limit controller
(pull-in/drop-out delay, hysteresis)

• Pulse width output
(see control functions)

• Pulse frequency output
(see control functions)

• Modulating controller function
(see control functions)

• Limit comparators
(pull-in/drop-out delay, hysteresis)

• Pulse function
The output switches on briefly when
reaching the switching point and then off
again.

•Alarm

• Sensor or range error

• Response to alarm, over/underrange,
calibration and HOLD

Contact functions

MAX limit comparator

MIN limit comparator

Alarm window 1

Alarm window 2

Pulse contact
Trigger condition longer than pulse
duration

Analog Outputs

There are up to 2 analog outputs available.
The following functions can be selected:

Output Analog process value output Continuous controller

Main variable Temperature
1X-X
2-XX

With the analog process value output, the range start and end values are freely selectable.
The response of the outputs to over/underrange, alarm and calibration is freely programmable.
Simulation function: The analog process value outputs can be freely set in the manual ("Hand")

Application: "Dry run" start-up of the plant, troubleshooting, servicing.

V1.00/EN/00477047

mode.

main value

Page 4/12Data Sheet 202565

JUMO GmbH & Co. KG

Delivery address: Mackenrodtstraße 14

36039 Fulda, Germany

Postal address:

36035 Fulda, Germany
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Internet: www.jumo.net

JUMO Instrument Co. Ltd.

JUMO House
Temple Bank, Riverway
Harlow, Essex CM20 2DY, UK
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Internet: www.jumo.co.uk

JUMO Process Control, Inc.

6733 Myers Road
East Syracuse, NY 13057, USA
Phone: [phone]

1-800-554-5866
Fax: [phone]
Email: [e-mail]
Internet: www.jumousa.com

Time

On

Off

Pulse duration

Pulse
contact

Time

On

Off

Trigger
condition

Process value X

Setpoint W

Proportional band X

P

100%

50%

0%

Output level y

Switching period

10%

90%

90%

10%

t

On

50%

50%

t

Off

10%

90%

X

P

X - W

0

1

100%

50%

0%

No pulses

50% of pulse frequency

Maximum pulse frequency

Setpoint W

Proportional band X

P

X

P

X - W

0

1

Output level y

Process value X

Pulse contact
Trigger condition shorter than pulse

Pulse width controller
(output is active with X > W and P action)

duration

If the process value X exceeds the setpoint W,
the P controller will control proportionally to
the control deviation. On going outside the
proportional band, the controller operates
with an output level of 100 % (100 % duty
cycle).

Measuring ranges / cell constants

This state-of-the art instrument offers a far wider dynamic range on the input side than can be
managed physically or chemically by the conductivity cells. For this reason, the range must be
matched to the operating range of the cell.

Examples of ranges for combination
with 2-electrode cells

Cell constant (K) Recommended/practical measuring span

0.01 1/cm 0.05 µS/cm to 20 µs/cm

0.1 1/cm 1 µS/cm to 1000 µs/cm

1.0 1/cm 0.01 mS/cm to 100 ms/cm

3.01/cm 0.1mS/cmto30ms/cm

10.0 1/cm 0.1 mS/cm to 200 ms/cm

(depending on the conductivity cell)

Pulse frequency controller
(output is active with X > W and P action)

If the process value X exceeds the setpoint W,
the P controller will control proportionally to
the control deviation. On going outside the
proportional band, the controller operates
with an output level of 100 % (maximum
switching frequency).

It is assumed that the measuring span of the
instrument is always larger than the
recommended or practically usable range of
the conductivity cell.
The smaller range (instrument or conductivity
cell) determines the maximum range that can
be used.

Example

Which span can the instrument cover with a
predefined cell constant?

The predefined cell constant is K=0.4
The span of the instrument is

0.1 µS/cm x 0.4 1/cm to
1250 mS/cm x 0.4 1/cm
➝ 0.04 µS/cm — 500 mS/cm

Example

A measurement is to be carried out in the 10 µS/cm to 500 µS/cm range. A conductivity cell with
the cell constant K = 0.1 1/cm is chosen.
The unit µS/cm without a decimal place is configured on the instrument.

Combination with 4-electrode cells and 2-electrode cells
having cell constants that deviate from the above graduation

This requires taking a closer look at the instrument technology and considering both the
uncompensated and the temperature-compensated measuring span.

The uncompensated measuring span of the instrument is calculated according to the formula:
Measuring span = 0.1 µs/cm x cell constant (K) to 2500 mS x cell constant (K).

After taking account of the temperature compensation range, the following compensated
measuring span (approx.) will remain:
Measuring span = 0.1 µs/cm x cell constant (K) to 1250 mS x cell constant (K).

Cell constant (K) Measuring span covered by instrument

0.01 0.001 µS/cm to 1.25 ms/cm

0.1 0.01 µS/cm to 12.5 ms/cm

1.0 0.1 µS/cm to 125 ms/cm

3.0 0.3 µS/cm to 375 ms/cm

10.0 0.1 mS/cm to 1250 ms/cm

V1.00/EN/00477047

(temperature-compensated)