Swan Analytical Instruments AMI Trides User manual

Operator’s Manual
Firmware V6.20 and higher
AMI Trides
A-96.250.111 / 161120

© 2020, Swan Analytische Instrumente AG, Switzerland, all rights reserved.
The information contained in this document is subject to change without notice.
Customer Support
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
Internet: www.swan.ch
E-mail: [email protected]
Document Status
Title: AMI Trides Operator’s Manual
ID: A-96.250.111
Revision Issue
00 Sept. 2004 First Edition
01 Sept. 2006 ---------
02 Nov. 2012 Improved troubleshooting, general update according
to new firmware release.
03 April 2016 Update to FW Release 6.00, Mainboard Rev. 2.5
04 July 2020 Mainboard Rev. 2.6

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AMI Trides
3
Table of Contents
1. Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1. Warning Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2. General Safety Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.3. Restriction for use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2. Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1. Description of the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2. Instrument Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.3. Instrument Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.1. Installation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.2. Mounting of Instrument Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.3. Connecting Sample and Waste. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.4. Install the Reference Electrode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.5. Install the Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.6. Install the Optional pH or Redox Electrode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.6.1 Install the pH or Redox Electrode into the Flow Cell . . . . . . . . . . . . . . . . . . . 24
3.6.2 Connect the pH Electrode to the Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . 25
3.6.3 Firmware Settings for pH/Redox Electrode . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.7. Electrical Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.7.1 Connection Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.7.2 Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.8. Relay Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.8.1 Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.8.2 Alarm Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.8.3 Relay 1 and 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.9. Signal Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.9.1 Signal Output 1 and 2 (current outputs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.10. Interface Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.10.1 Signal Output 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
3.10.2 Profibus, Modbus Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
3.10.3 HART Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3.10.4 USB Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
4. Instrument Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.1. Establish sample flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.2. Programming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.3. Calibration of pH electrode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
4.4. Correction of Trides sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

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5. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
5.1. Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
5.2. Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
5.3. Software Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.4. Changing Parameters and values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
6. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
6.1. Maintenance Schedule. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
6.2. Cleaning of Trides protective filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
6.3. Cleaning of Trides sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
6.4. Cleaning of Reference Electrode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6.5. Cleaning of pH Electrode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.6. Cleaning of Flow Cell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6.7. Calibration of Trides Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
6.7.1 Process pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
6.7.2 Standard pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6.7.3 Standard Redox . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
6.7.4 Zero Trides . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
6.7.5 Process Trides . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
6.8. Longer Stop of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
7. Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.1. Diagnostic Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.2. Troubleshooting List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
7.3. Error List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
7.4. Replacing Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
8. Program Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
8.1. Messages (Main Menu 1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
8.2. Diagnostics (Main Menu 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
8.3. Maintenance (Main Menu 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
8.4. Operation (Main Menu 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
8.5. Installation (Main Menu 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
9. Program List and Explanations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
1 Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
2 Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
3 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
5 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
10. Material Safety Data sheets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
10.1. Reagents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

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11. Default Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
12. Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
13. Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

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Safety Instructions
6
AMI Trides–Operator’s Manual
This document describes the main steps for instrument setup, opera-
tion and maintenance.
1. Safety Instructions
General The instructions included in this section explain the potential risks
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 environ-
ment.
More safety instructions are given throughout this manual, at the re-
spective locations where observation is most important. Strictly fol-
low all safety instructions in this publication.
Target
audience
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.
OM Location Keep the AMI Operator’s Manual in proximity of the instrument.
Qualification,
Training
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.

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AMI Trides
Safety Instructions
7
1.1. Warning Notices
The symbols used for safety-related notices have the following
meaning:
DANGER
Your life or physical wellbeing are in serious danger if such warn-
ings 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 values can be the consequence if such warnings are ig-
nored.
Follow the prevention instructions carefully.
Mandatory
Signs
The mandatory signs in this manual have the following meaning:
Safety goggles
Safety gloves

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Safety Instructions
8
Warning Signs The warning signs in this manual have the following meaning:
Electrical shock hazard
Corrosive
Harmful to health
Flammable
Warning general
Attention general

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AMI Trides
Safety Instructions
9
1.2. General Safety Regulations
Legal
Requirements
The user is responsible for proper system operation. All precautions
must be followed to ensure safe operation of the instrument.
Spare Parts
and
Disposables
Use only official SWAN spare parts and disposables. If other parts
are used during the normal warranty period, the manufacturer’s war-
ranty is voided.
Modifications Modifications and instrument upgrades shall only be carried out by
an authorized Service Technician. SWAN will not accept responsibili-
ty for any claim resulting from unauthorized modification or alter-
ation.
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 instrument
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.

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AMI Trides
Safety Instructions
10
1.3. Restriction for use
Sample
requirements
Addition or presence of disinfectants containing stabilizers like
cyanuric acid or 5,5-Dimethylhydantoin or organic chlorine com-
pounds perturb the measurement. A controlled dosing system de-
pending on chlorine surplus cannot operate with these products.
Cleaner and corrosion preventives (phosphates) may perturb the
measurement.
Do not use copper tubes in the water treatment area. Copper per-
turbs the sensor system.
No sand (or other polishing material) or oil are allowed in the sample.
Dechlorination After dechlorination the disinfectant value is always (near) zero: To
prevent biological growth, we strongly recommend to flush the flow
cell and sensor occasionally with water of higher disinfectant con-
centration, e.g. by switching to a sample line before dechlorination.
To do a sensible correction, a certain amount of chlorine is required,
which may not be available during normal operation.
Mixture of
several
disinfectants
The Trides always measures the total of all added disinfectants. Sep-
aration measurements are not possible.
Download
MSDS
The current Material Safety Data Sheets (MSDS) for the above listed
Reagents are available for downloading at www.swan.ch.

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AMI Trides
Product Description
11
2. Product Description
2.1. Description of the System
Application
Range
The AMI Trides is used to measure and control the following disin-
fectants in potable water, sanitary water and swimming pools:
Hypochlorous acid
Free chlorine
Ozone
Chlorine-dioxide
Bromine
Iodine
There are two main applications:
1) Control of setpoint
The instrument is used to measure and maintain a certain disinfec-
tant value in the system. The disinfectant is added with a dosing unit.
2) Dechlorination
The disinfectant is removed to protect a device which is sensitive to
disinfectants, e.g. a reverse osmosis. The instrument detects the re-
maining disinfectant level after dechlorination and superintends that
the disinfectant concentration does not exceed the max. limit value.
Otherwise a warning is issued.
Signal
Outputs
Two signal outputs programmable for measured values (freely scal-
able, linear, bilinear, log) or as continuous control output (control pa-
rameters programmable).
Current loop: 0/4–20 mA
Maximal burden: 510 Ω
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).
Relays Two potential-free contacts programmable as limit switches for mea-
suring values, controllers or timer for system cleaning with automatic
hold function.
Maximum load: 1 A/250 VAC

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AMI Trides
Product Description
12
Alarm Relay One potential free contact.
Alternatively:
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 in-
strument faults.
Input For potential-free contact to freeze the measuring value or to inter-
rupt control in automated installations (hold function or remote-off).
Communica-
tion interface
(optional)
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
Safety
Features
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.
Option
pH or Redox
An optional pH/Redox electrode can be installed. Temperature com-
pensation of pH is done automatically.
Display Selectable measuring unit as ppm or mg/l.

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Product Description
13
Measuring
principle
3-electrode amperometry:
The sensor consists of two platinum electrodes and a reference elec-
trode. A voltage is applied between the measuring electrode (plati-
num rod) and the counter electrode (platinum ring) of the Trides
sensor. The disinfectant in the sample generates a small current be-
tween the electrodes, which is proportional to the disinfectant con-
centration. The reference electrode controls the voltage and
guarantees optimal measuring conditions on the platinum sensor.
For optimal sensitivity, a rotor continuously cleans the surfaces of the
platinum electrodes (hydrodynamic cleaning). A Hall-effect sensor
measures the rotations of the rotor to detect if there is sufficient flow.
The signal of amperometric systems depends on flow. The flow cell
with constant head excludes all flow effects if the sample always
overflows into the longer constant head tube.
Temperature compensation is done automatically.
About free
chlorine
If chlorine is dissolved in water, it decomposes into hypochlorous
acid and hypochlorite. Free chlorine = hypochlorous acid + hypochlo-
rite. The ratio depends on the pH value.
At pH 7: 77% hypochlorous acid, 23% hypochlorite
At pH 8: 25% hypochlorous acid, 75% hypochlorite
The hypochlorous acid is a much better disinfectant than hypochlo-
rite. This means the efficiency of disinfection depends on pH value.
y1% HOCL (hypochlorous acid)
y2% Disinfection
a1, a2Sensitivity of electrochemical measurement in %
The DPD test always indicates free chlorine.
Amperometric sensors measure mainly the hypochlorous acid.
Therefore, the higher the pH value is, the lower the current of the
sensor.
100
y1
a1
a2
90
80
70
60
50
40
30
20
10
5678 910
pH
0
100
y2
90
80
70
60
50
40
30
20
10
0

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Product Description
14
A pH compensation of the sensor signal is necessary to be able to
compare the value directly to the DPD method. For that select <Free
chlorine> in menu 5.1.3 <Installation/Sensors/Disinf.> The pH must
be measured by an optional pH electrode or programmed correctly.
Hypochlorous
acid
If hypochlorous acid is chosen as disinfectant in 5.1.3, the pH com-
pensation is switched off. The displayed values show the efficiency
of disinfection. Only when the correction is activated the value is dis-
played as free chlorine and can therefore be compared directly with
the manual DPD value.
Free Chlorine
+ HOCl
If you program Free+HOCl (HOCl=hypochlorous acid) as disinfec-
tant in 5.1.3 you can set hypochlorous acid as parameter for the sig-
nal outputs. The displayed value will be free chlorine.
On-line
operation
The sample enters at the sample inlet [E]. It passes the filter vessel
[G] and the flow regulating valve [D], where the sample flow is ad-
justed, and fills the constant head [A]. Sample must always overflow
via the overflow tube [B] into the waste to ensure constant pressure
at the Trides sensor [F].
A part of the sample flows through the overflow tube [C] to the Trides
sensor [F], turns the rotor and leaves via sample outlet [H] into the
waste. The rotation of the rotor is detected with a hall effect sensor to
assure sufficient sample flow. An inconsistent sample flow causes
the rotor to turn slowly (or stop) and produces a system error.
Grab sample The grab sample outlet is used to take sample from the Trides con-
stant head. This sample can be used to perform a comparison mea-
surement with an other instrument.
The standard method to correct the AMI Trides is the DPD photomet-
ric method. Use a high quality photometer to determine the reference
value, e.g. Swan Chematest.

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AMI Trides
Product Description
15
Fluidics
overview
A
B
C
D
E
Constant head
Overflow tube to waste
Overflow tube to sensor
Flow regulating valve
Sample inlet
F
G
H
I
J
Trides sensor
Filter vessel
Sample outlet
Grab sample outlet
Grab sample valve
A
B
C
D
E
F
G
H
I
J

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Product Description
16
2.2. Instrument Specification
Power Supply AC variant:
DC variant
Power consumption:
100–240 VAC (± 10%)
50/60 Hz (± 5%)
10–36 VDC
max. 35 VA
Transmitter
specifications
Housing:
Ambient temperature:
Storage and transport:
Humidity:
Display:
aluminum, with a protection degree of
IP 66 / NEMA 4X
−10 to +50 °C
−30 to +85 °C
10–90% rel., non condensing
backlit LCD, 75 x 45 mm
Sample
requirements
Water consumption:
Temperature:
Inlet pressure:
Outlet pressure:
Min. sample
conductivity:
approx. 40 l/h
5–45 °C (41–113 F)
0.15–2 bar (2.2–29 PSI)
pressure-free
5 µS/cm
no oil and no grease
On-site
requirements
The analyzer site must permit connections to:
Sample inlet:
Sample outlet:
Hose nozzle R ¼” x 6 mm
G ½” adapter for flexible tube
15 x 20 mm

A-96.250.111 / 161120
AMI Trides
Product Description
17
Dimensions Panel:
Dimensions:
Screws:
Weight:
PVC
850 x 280 x 200
5 mm or 6 mm diameter
6 kg
Exit Enter
Ozone Monitor
AMI Trides
254 mm / 10.00"
280 mm / 11.02"
850 mm / 33.46"
13 mm / 0.51"
6 x dia. 6.5 mm / 0.26"
412 mm / 16.22" 824 mm / 32.44"
30 mm / 1.18"

A-96.250.111 / 161120
AMI Trides
Product Description
18
Dimensions
(compact
version)
Panel:
Dimensions:
Screws:
PVC
530x300x200 mm
5 mm or 6 mm diameter
Exit Enter
Ozone Monitor
AMI Trides
A
MI Tri
d
es
260 mm/ 10.24"
300 mm/ 11.81"
530 mm / 20.87" 490 mm / 19.29"
20 mm / 0.79"
4 x dia. 6.5 mm / 0.26"

A-96.250.111 / 161120
AMI Trides
Product Description
19
2.3. Instrument Overview
A
B
C
D
E
F
G
H
I
Panel
Transmitter
pH/Redox electrode
Temperature sensor
Calibration solution pH 7
Calibration solution pH9
Constant head
Reference electrode
Flow regulating valve
J
K
L
M
N
O
P
Q
Grab sample valve
Grab sample outlet
Trides sensor
Filter
Sample outlet
Sample inlet
Hall-effect sensor
Flow cell block
A
B
C
D
E
F
I
K
L
M
N
P
Q
O
G
H
J

A-96.250.111 / 161120
AMI Trides
Installation
20
3. Installation
3.1. Installation Checklist
On-site
requirements
AC variant: 100–240 VAC ( 10%), 50/60 Hz ( 5%)
DC variant: 10–36 VDC
Power consumption: 35 VA maximum.
Protective earth connection required.
Sample line with sufficient sample flow and pressure (see Instrument
Specification, p. 16).
Installation Mount the instrument in vertical position.
Display should be at eye level.
Mount the filter, filter vessel, the long and short overflow tube, the
outer tube and constant head cover.
Connect the sample and waste line.
Electrical Wiring Connect all external devices like limit switches, current loops and
pumps (see Connection Diagram, p. 29).
Connect power cord; do NOT switch on power yet!
Electrodes Install the reference electrode.
Install the pH electrode (optional).
Temperature
sensor
The temperature sensor is already connected to the transmitter and
fixed to the panel with an adhesive tape.
Power-up Turn on the sample flow and wait until the rotor on the Trides sensor
starts turning.
Switch on power.
Instrument
set-up
Program all parameters for sensor and external devices (interface,
recorders, etc.).
Program all parameters for instrument operation (limits, alarms).
pH/Redox elec-
trode calibration
Calibrate pH/Redox electrode if installed.
Free chlorine
> 0.1 ppm
Let instrument operate 24 h without interruption at normal sample
conditions. Then correct disinfection value if necessary.
Free chlorine
< 0.1 ppm
Let instrument operate at least 5 days without interruption at
normal sample conditions. Make zero point calibration. Correct
disinfection value if necessary.