SWAN and its representatives maintain a fully trained staff of technical specialists
around the world. For any technical question, contact your nearest
SWAN representative, or the manufacturer:
SWAN ANALYTISCHE INSTRUMENTE AG
Studbachstrasse 13
8340 Hinwil
Switzerland
This document describes the main steps for instrument setup, operation and maintenance.
GeneralThe instructions included in this section explain the potential risks
Targ et
audience
OM LocationKeep the AMI Operator’s Manual in proximity of the instrument.
Qualification,
Training
associated with instrument operation and provide important safety
practices designed to minimize these risks.
If you carefully follow the information contained in this section, you
can protect yourself from hazards and create a safer work environment.
More safety instructions are given throughout this manual, at the
respective locations where observation is most important. Strictly
follow all safety instructions in this publication.
Operator: Qualified person who uses the equipment for its intended
purpose.
Instrument operation requires thorough knowledge of applications,
instrument functions and software program as well as all applicable
safety rules and regulations.
To be qualified for instrument installation and operation, you must:
read and understand the instructions in this manual as well as
the Material Safety Data Sheets.
know the relevant safety rules and regulations.
A-96.250.871 / 1204173
AMI CACE
Safety Instructions
1.1.Warning Notices
The symbols used for safety-related notices have the following significance:
DANGER
Your life or physical wellbeing are in serious danger if such
warnings are ignored.
Follow the prevention instructions carefully.
WARNING
Severe injuries or damage to the equipment can occur if such
warnings are ignored.
Follow the prevention instructions carefully.
CAUTION
Damage to the equipment, minor injury, malfunctions or incorrect process can be the consequence if such warnings are ignored.
Follow the prevention instructions carefully.
Mandatory
Signs
The importance of the mandatory signs in this manual.
Safety goggles
Safety gloves
4A-96.250.871 / 120417
AMI CACE
Safety Instructions
Warning SignsThe importance of the warning signs in this manual.
Electrical shock hazard
Corrosive
Harmful to health
Flammable
Warning general
Attention general
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AMI CACE
Safety Instructions
1.2.General Safety Regulations
Legal
Requirements
Spare Parts
and
Disposables
ModificationsModifications and instrument upgrades shall only be carried out by
The user is responsible for proper system operation.
All precautions must be followed to ensure safe operation
of the instrument.
Use only official SWAN spare parts and disposables. If other parts
are used during the normal warranty period, the manufacturer’s
warranty is voided.
an authorized Service Technician. SWAN will not accept responsibility for any claim resulting from unauthorized modification or alteration.
WARNING
Electrical Shock Hazard
If proper operation is no longer possible, the instrument must be
disconnected from all power lines, and measures must be taken
to prevent inadvertent operation.
To prevent from electrical shock, always make sure that
the ground wire is connected.
Service shall be performed by authorized personnel only.
Whenever electronic service is required, disconnect in-
strument power and power of devices connected to:
– relay 1,
– relay 2,
– alarm relay
WARNING
For safe instrument installation and operation you must read
and understand the instructions in this manual.
WARNING
Only SWAN trained and authorized personnel shall perform the
tasks described in this document.
6A-96.250.871 / 120417
AMI CACE
Safety Instructions
1.3.Restriction for use
The AMI CACE is designed for determination of:
specific (total) conductivity
cation (acid) c
in power plant water.
It calculates the pH value and the concentration of the alkaline substance (NH
the water.
It is not suitable for pH determination in high purity water before
alkalization agent addition.
3
onductivity after the cation exchanger (CACE)
, morpholine, etc.) if an alkaline substance is present in
Conditions for pH calculation:
only 1 alkalization agent in the sample
the contamination is mostly NaCl
phosphate concentration is < 0.5 ppm
pH value is > 7.5, and < 11.5
if pH value is < 8, the concentration of contaminant must be
small compared to the concentration of the alkalization agent
No sand. No oil. Use of film forming products may reduce lifetime of
EDI module.
The sample must not contain any particles which may block the
flow cell. Sufficient sample flow is coercive for the correct function
of the instrument.
A-96.250.871 / 1204177
AMI CACE
Product Description
2.Product Description
2.1.Description of the System
Application
Range
Special
Features
Signal
Outputs
RelaysTwo potential-free contacts programmable as limit switches for
Complete monitoring system for the automatic, continuous measurement of the specific (total) conductivity before a cation exchanger and the cation (acid) c
(CACE).
Based on difference conductivity measurement, the pH of the sample can be calculated.
Temperature compensation curves for conductivity measure-
Flow monitoring
Calculation of pH according to VGB 450L, edition 2006
Calculates the concentration of an alkaline substance present
in the water (ammonia, morpholine or ethanolamines).
Two signal outputs programmable for measured values (freely scalable, linear, bilinear, log) or as continuous control output (control
parameters programmable).
Current loop:0/4–20 mA
Maximal burden:510
Third signal output available as an option. The third signal output
can be operated as a current source or as a current sink (selectable
via switch).
measuring values, controllers or timer for system cleaning with automatic hold function. Both contacts can be set as normally open or
normally closed with a jumper.
Maximum load: 1 A/250 VAC
Open during normal operation, closed on error and loss of
power.
Closed during normal operation, open on error and loss of
power.
Summary alarm indication for programmable alarm values and instrument faults.
InputOne input for potential-free contact to freeze the measuring value
or to interrupt control in automated installations (hold function or re-
mote-off).
Communica-
tion interface
(optional)
Safety
Features
Measuring
principle
Specific
Conductivity
Cation Con-
ductivity (Acid
Conductivity)
USB Interface for logger download
Third signal output (can be used in parallel to the USB interface)
RS485 with Fieldbus protocol Modbus or Profibus DP
HART interface
No data loss after power failure. All data is saved in non-volatile
memory.
Over voltage protection of in- and outputs.
Galvanic separation of measuring inputs and signal outputs.
When a voltage is set between two electrodes in an electrolyte
solution, the result is an electric field which exerts force on the
charged ions: the positively charged cations move towards the negative electrode (cathode) and the negatively charged anions towards the positive electrode (anode). The ions, by way of capture
or release of electrons at the electrodes, are discharged and so a
current I flows through this cycle and the Ohm’s law V = I×R applies. From the total resistance R of the current loop, only the resistance of the electrolyte solution, respectively its conductivity
of interest.
The cell constant of the sensor is determined by the manufacturer
and is printed on the sensor label. If the cell constant has been programmed in the transmitter, the instrument measures correctly. No
calibration needs to be done, the sensor is factory calibrated. Measuring unit is S/cm or S/m.
Conductivity from all ions in the sample, mainly the alkalization
agent. The contribution of impurities is masked by the alkalization
agent.
The alkalization agent is removed by the cation exchange resin in
the EDI module. All cationic ions are exchanged with H+, all anionic
impurities (ions with negative charge) pass through the module unchanged and are measured by the second conductivity sensor.
1
/R, is
A-96.250.871 / 1204179
AMI CACE
Product Description
Tem per atu re
compensation
Standard
Tem per atu re
Correction or
calibration
FluidicsThe sample flows into the flow cell block [D] via the sample inlet [L].
Regeneration
of the cation
exchange resin
The mobility of ions in water increases with higher temperature,
which enlarges the conductivity. Therefore, the temperature is measured simultaneously by an integrated Pt1000 temperature sensor
and the conductivity is compensated to 25 °C. Several temperature
compensation curves designed for different water compositions can
be chosen. After cation exchanger (cation conductivity), the temperature compensation curve strong acids has to be set.
For more information see: Influence of Temperature on Electrical
Conductivity, PPChem (2012).
The displayed conductivity value is compensated to 25°C standard
temperature.
Not necessary.
Auto zero is done automatically each day at 0:30 at night.
With the first conductivity sensor [A] the specific conductivity of the
sample is measured. A capillary tube [F] placed after the first conductivity sensor regulates the sample flow. Then the sample is led
through the sample chamber [I] containing a cation exchange resin.
Afterwards the cation conductivity of the sample is measured with
the second conductivity sensor [B]. The temperature is measured
with the temperature sensors integrated in the conductivity sensors.
After the measurement of specific and cation conductivity, the sample leaves the measuring cell via flow meter [E] and flows through
the anode chamber, where protons are generated by electrolysis of
water:
H
O --> ½ O2 + 2 H+ + 2e
The water is then led through the cathode chamber where it is reduced according to:
Finally, the sample leaves the EDI module and flows into the waste.
Under the influence of the electrical field generated by the two
electrodes, the protons produced at the anode are drawn towards
the cathode. They pass through the membrane and are absorbed
by the cation exchange resin in the sample chamber. At the same
time, the cations captured in the resin are released and move towards the cathode chamber, where they are dissolved by the sample water and flushed out of the EDI module. This process ensures
that the resin is continuously regenerated.
+
2 H
+ 2 e- --> H2 resp. 2 H2O + 2 e- --> ½ H2 + 2 OH
2
-
-
10A-96.250.871 / 120417
AMI CACE
G
M
N
L
C
JK
F
I
H
D
E
BA
I
JK
H
G
D
X
Product Description
NOTICE: To visualize the sample flow more clearly, the EDI
module is shown only schematically. Lateral view X shows the
correct positions of the chambers and electrodes.
A
First conductivity sensor
B
Second conductivity sensor
C
Blind plug
D
Flow cell block
E
Flow meter
F
Capillary tube
G
EDI module
H
Deaeration tube
I
Sample chamber
J
Anode chamber
K
Cathode chamber
L
Sample inlet
M
Waste
N
Membranes
X
Lateral view of the EDI
module
A-96.250.871 / 12041711
AMI CACE
Product Description
2.2.Instrument Specification
Power SupplyVoltage:100–240 VAC (± 10%)
50/60 Hz (± 5%)
or 24 VDC (± 10%)
Power consumption:max. 30 VA
Sample
requirements
On-site
requirements
Flow rate: 3–4 l /h
Temperature: up to 50 °C
Inlet pressure: up to 0.5 bar
Outlet pressure:pressure free
Use of a SWAN Backpressure Regulator is highly recommended.
Particle filtration recommended in case of high iron concentration.
NOTICE: No oil, no grease, no sand. Use of film forming
products may reduce lifetime of EDI module.
The analyzer site must permit connections to:
Sample inlet:Swagelok 1/4” adapter for stainless
steel tube
Sample outlet:G 3/8” adapter for flexible tube
diam. 20 x 15 mm
Measuring
range
EDI capacitySC
Accuracy±1% of measuring value or ±1 digit (whichever is greater)
Electronics
housing
DimensionsPanel: Dimensions: 280 x 850 x 200 mm
Measuring rangeResolution
0.055 to 0.999 S/cm0.001 S/cm
1.00 to 9.99 S/cm0.01 S/cm
10.0 to 99.9 S/cm0.1 S/cm
100 to 1000 S/cm1 S/cm
Automatic range switching.
= 40 S/cm as NH4OH
max
SC
= 350S/cm as NaOH
max
Aluminum with a protection degree of IP 66 / NEMA 4X
Ambient temperature:-10 to +50 °C
Humidity: 10–90% rel., non condensing
Display:backlit LCD, 75 x 45 mm
Screws:8 mm diameter
Weight: 14 kg
12A-96.250.871 / 120417
AMI CACE
Product Description
280 mm / 11”
254 mm / 10”
13 mm / ½”
”
8
/
3
4 x dia. 10 mm /
”
16
/
7
850 mm / 33½”
824 mm / 32
A-96.250.871 / 12041713
AMI CACE
A
B
C
D
E
F
G
Product Description
2.3.Instrument Overview
A
Panel
B
Transmitter
C
Specific conductivity sensor
D
Cation conductivity sensor
E
Flow cell
F
Flow meter
G
Electrodeionization (EDI)
module
14A-96.250.871 / 120417
AMI CACE
Installation
3.Installation
3.1.Installation Checklist Monitors
CheckInstrument’s specification must conform to your AC power ratings.
Do not turn on power until instructed to do so.
On site requirements
Installation
Electrical Wiring
Power-up
Instrument
set-up
Run-in period
100– 240 VAC (± 10%), 50/60 Hz (± 5%) or 24 VDC, isolated
(±10%) power outlet with ground connection and 30 VA
For sample requirements see Instrument Specification, p. 12).
Mount the instrument in vertical position.
Display should be at eye level.
Remove the end caps from tubes 1, 2, 3, 5 and 10 and connect
the tubes according to Tube numbering, p. 43.
Connect sample inlet and outlet.
Connect all external devices like limit switches, current loops and
pumps (see Connection Diagram, p. 20).
Connect power cord; do not switch on power yet!
Open sample flow and wait until the instrument is completely
filled.
Check inlet pressure.
Switch on power.
Program all sensor parameters (see Sensor parameters, p. 28).
If required activate calculations (see Calculations, p. 29).
Program all parameters for external devices (interface,
recorders, etc.).
Program all parameters for instrument operation (limits, alarms).
Program display screens.
Let the instrument run continuously for 1 h.
A-96.250.871 / 12041715
AMI CACE
Installation
3.2.Mounting of Instrument Panel
The first part of this chapter describes the preparing and placing of
the system for use.
The instrument must only be installed by trained personnel.
Mount the instrument in vertical position.
For ease of operation mount it so that the display is at eye
level.
For the installation a kit containing the following installation
material is available:
– 4 Screws 8x60 mm
– 4 Dowels
– 4 Washers 8.4/24 mm
Mounting re-
quirements
3.3.Connecting Sample Inlet and Outlet
3.3.1Swagelok Fitting Stainless Steel at Sample Inlet
PreparationCut the tube to length and deburr it. The tube must be straight and
Installation1 Insert the compression ferrule [C] and the compression
The instrument is only intended for indoor installation.
For dimensions see Dimensions, p. 12.
free from blemishes for approximately 1,5 x tube diameter from the
end.
Lubrication with lubricating oil, MoS2, Teflon etc. is recommended
for the assembly and reassembly of bigger sized unions (thread,
compression cone).
cone [D] into the union nut [B].
2 Screw the union nut onto the body, do not tighten it.
3 Push the stainless steel pipe through the union nut as far as it
reaches the stop of the body.
4 Mark the union nut at 6 o’clock position.
5 While holding the fitting body steady, tighten the nut union 1¼
rotation using an open ended spanner.
16A-96.250.871 / 120417
AMI CACE
12
3
9
6
ABCDE
F
A
B
C
A
Installation
3.3.2EDI module tubing
A
Stainless steel tube
B
Union nut
C
Compression ferrule
Remove the end caps [A] from tubes 1, 2, 3, 5 and 10 and connect
the tubes according to Tube numbering, p. 43. Keep the end caps
for later use.
D
Compression cone
E
Body
F
Tightened connection
A End cap
3.3.3Tube at Sample Outlet
A
EDI module
B
Hose nozzle
C
A-96.250.871 / 12041717
Connect a plastic tube [C] to the hose nozzle [B] and place it into a
drain with atmospheric pressure.
Plastic tube 20 x 15 mm
AMI CACE
Installation
3.4.Electrical Connections
Cable
thicknesses
WARNING
Electrical hazard.
Always turn off AC power before manipulating electric
parts.
Grounding requirements: Only operate the instrument
from an power outlet which has a ground connection.
Make sure the power specification of the instrument corre-
sponds to the power on site.
In order to comply with IP66, use the following cable thicknesses
ABC
PG 11 cable gland: cable Ø
A
B
PG 7 cable gland: cable Ø
C
PG 9 cable gland: cable Ø
NOTICE: Protect unused cable glands
Wire For Power and Relays: Use max. 1.5 mm
stranded wire with end sleeves.
For Signal Outputs and Input: Use 0.25 mm
stranded wire with end sleeves.
outer
3–6.5 mm
outer
4–8 mm
outer
5–10 mm
2
/ AWG 14
2
/ AWG 23
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AMI CACE
Installation
WARNING
External Voltage.
External supplied devices connected to relay 1 or 2 or to the
alarm relay can cause electrical shocks
Make sure that the devices connected to the following
contacts are disconnected from the power before resuming installation.
–relay 1
–relay 2
– alarm relay
WARNING
To prevent from electrical shock, do not connect the instrument
to the power unless the ground wire (PE) is connected.
Do not connect unless specifically instructed to do so.
WARNING
The mains of the AMI Transmitter must be secured by a main
switch and appropriate fuse or circuit breaker.
A-96.250.871 / 12041719
AMI CACE
Installation
3.5.Connection Diagram
CAUTION
Use only the terminals shown in this diagram, and only for the
mentioned purpose. Use of any other terminals will cause short
circuits with possible corresponding consequences to material
and personnel.
20A-96.250.871 / 120417
AMI CACE
A
B
C
D
Installation
WARNING
Electrical shock hazard
Installation and maintenance of electrical parts must be performed by professionals.
Always turn off AC power before manipulating electric
parts.
A
Power supply connector
B
Neutral conductor, Terminal 2
C
Phase conductor, Terminal 1
D
Protective earth PE
NOTICE: The protective earth wire (Ground) has to be
connected to the grounding terminal.
Installation
requirements
A-96.250.871 / 12041721
The installation must meet the following requirements.
Mains fuse 1.6 AT
Mains cable to comply with standards IEC 60227 or IEC
60245; flammable rating FV1
Mains equipped with an external switch or circuit-breaker
– near the instrument
– easily accessible to the operator
– marked as interrupter for AMI CACE
AMI CACE
10
12
11
0V
1)
10
12
11
0V
Installation
3.6.Relay Contacts
3.6.1Input
3.6.2Alarm Relay
NOTICE: Use only potential-free (dry) contacts.
The total resistance (sum of cable resistance and resistance of
the relay contact) must be less than 50 Ω.
Terminals 16/42
For programming see Program Overview, p. 45.
NOTICE: Max. load: 1 A / 250 VAC
Alarm output for system errors.
Error codes see Troubleshooting, p. 38.
NOTICE: With certain alarms and certain settings of the AMI
transmitter the alarm relay does not switch. The error, however,
is shown on the display.
Ter min alsDescriptionRelay connection
1)
NC
Normally
Closed
10/11Active (opened) during normal
operation.
Inactive (closed) on error and
loss of power.
NO
Normally
Open
12/11Active (closed) during normal
operation.
Inactive (opened) on error and
loss of power.
1) usual use
22A-96.250.871 / 120417
AMI CACE
6
0V
7
A
B
Installation
3.6.3Relay 1 and 2
NOTICE: Max. load: 1 A/250 VAC
Relay 1 and 2 can be configured as normally open or as normally
closed. Standard for both relays is normally open. To configure a relay as normally closed, set the jumper in the upper position.
NOTICE: Some error codes and the instrument status may
influence the status of the relays described below.
Relay
config.Terminals
Normally
Open
Normally
Closed
6/7: Relay 1
8/9: Relay 2
6/7: Relay 1
8/9: Relay 2
Jumper
pos.DescriptionRelay configuration
Inactive (opened) during
normal operation and
loss of power.
Active (closed) when a
programmed function is
executed.
Inactive (closed) during
normal operation and
loss of power.
Active (opened) when a
0V
programmed function is
executed.
6
7
ABJumper set as normally open (standard setting)
Jumper set as normally closed
For programming see Program Overview, p. 45, Menu Installation
A-96.250.871 / 12041723
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