ProMinent Ammonia User manual

Ammonia Analyzer
Operating Manual
ProMinent Fluid Controls, Inc.
136 Industrial Drive│Pittsburgh, PA 15275
Phone [phone]│Fax [phone]
www.prominent.us

AMMONIA User Manual
AMMONIA_User 3/15/201
2
CONTENTS
A. THEORY OF OPERATION
B. INSTALLATION & NAVIGATION
B.1 Plumbing
B.2 Cabling-Wiring
B.3 Water Meters – Flowswitches – Contacts
B.4 Safety & Navigation
B.5 Browser
B.6 Communications
B.7 Data Logging
C. START-UP
D. ANALYZER OPERATION
1. Day-to-Day Operation
1.1 Main Menu: Sensors, Pumps, Solenoids & Valves
1.2 Checking & Clearing Alarms
2. Sensors: Ammonia (NH3), pH, temperature, 4-20mA…
2.1 Sensors
2.2 Sensor Calibration
2.3 Sensor Alarms
2.4 Sensor Configure
2.5 Sensor Compensation
2.6 Sensor Diagnostics
3 Flowswitches & Contact Sets
3.1 Contact Sets 101
3.2 Contact Set Alarms
3.3 Inverting Contact Sets
3.4 Contact Set Controls
4. 4-20mA Outputs
4.1 4-20mA Output Setpoints
4.2 4-20mA Output Configuration
5. System Settings

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5.1 Passwords
5.2 Time & Date
5.3 Keypress-Alarm Log
5.4 Enabling Inputs & Outputs
5.5 Metric & U.S. Units
5.6 Configurations
5.7 Communications
5.8 System Diagnostic
6. Product Support
6.1 Application and Technical Support
6.2 Specifications
E. APPENDIX
A. Isometric Drawing
B. Dimensions
C. Parts
D. Component Description
E. Standards preparation for calibration
F. Driver Cards
LB. LAN Browser

4
A. THEORY OF OPERATION
What is ammonia?
Ammonia (NH3) is a poisonous and pungent-smelling colorless gas that makes the eyes water. Ammonia is readily
soluble in water. The aqueous solution has an alkaline reaction and is known as ammonia water or tincture of
ammonia. In conjunction with acid, ammonia forms salts that disassociate in water, to form ammonium ions (NH4+)
and the corresponding anions. In nature, ammonia is produced by the decomposition of animal or vegetable
material that contains nitrogen.
Typical areas of application for ammonia sensors
The ProMinent ammonia analyzer sensor can be used to measure ammonia (NH3) in aqueous solutions. Ammonia in
an aqueous solution is in a pH-dependent equilibrium with ammonium ions. If ammonium ions are converted into
ammonia by the addition of an alkali, then the sensor will detect the resulting ammonia gas. The ammonium ions
themselves will not be detected.
Fig. 1: ProMinent Ammonia Analyzer

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Some'typical'applications'using'ammonia'sensors'are:'
-municipal'water'plant'chloramination'monitoring
-wastewater'of'gas'scrubbers
-wastewater'monitoring
-ammonia'leaks'in'cooling'towers
-the'food'sector,'e.'g.'for'wine'and'beer
-laboratories.
The'measurement'can'be'made'directly'in'the'liquid'medium.'This'means'that'it'is'not'necessary'to'carry'out'time-
consuming'and'complicated'sample'preparation.'Colored'or'cloudy'samples'can'also'be'measured.''The'pH'value'
must'be'greater'than'7.3'or'the'chemical'equilibrium'of'the'ammonium'ions'shifts'towards'the'ammonia'state.'
If'the'sample'contains'substances'that'could'damage'the'sensor'membrane,'such'as'oils,'fats'or'tensides,'then'the'
ammonia'can'still'be'measured,'using'the'technique'known'as'“head'space”.'In'this'case,'damage'to'the'sensor'is'
ruled'out,'because'there'is'no'direct'contact'between'the'sensor'and'the'sample.'Measurement'is'performed'in'a'
gas-tight'space'above'the'substance'being'measured.''This'gas-tight'space'above'the'substance'being'measured'is'in'
equilibrium'with'the'liquid'as'far'as'ammonia'is'concerned.'
The'simple'sample'preparation'makes'determination'of'the'ammonia'concentration'a'fast'and'economical'operation'
that'can'be'applied'with'high'precision'over'a'wide'range'of'concentration.'''
Principles of analyzer operation
The'ammonia'sensor'consists'of'a'glass'pH'electrode'and'a'reference'electrode'which'are'surrounded'by'a'common'
electrolyte'that'is'separated'from'the'liquid'being'measured'by'a'hydrophobic,'gas-permeable'membrane.'
A'thin'layer'of'electrolyte'is'between'the'hydrophobic'membrane'and'the'glass'pH'electrode.'Its'pH'value'increases'
when'NH3'gas'makes'its'way'through'the'membrane.'The'chemical'processes'in'the'electrolyte'layer'are'described'
by'the'following'reaction'equation.'
NH3'+'H2O'à'NH4+'+'OH-(1)'
This'means'that'NH3'functions'as'a'base'and'thus'increases'the'pH'in'the'thin'electrolyte'layer'in'front'of'the'glass'
pH'electrode.'Since'there'is'only'a'very'small'volume'of'liquid'between'the'hydrophobic'PTFE'membrane'and'the'
glass'electrode,'the'electrode'reacts'very'sensitively'to'the'smallest'amount'of'ammonia.'
A'strongly'simplified'derivation'leads'to'the'following'relationship'between'the'sensor'signal'and'the'concentration'
of'ammonia'in'the'substance'being'measured:'The'reaction'(Equation'1)'is'described'by'the'law'of'mass'action:'
K'='[NH4+]'[OH-]'/'[NH3] (2)'
K'='equilibrium'constant'
[x] ='concentration'component'x

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The'electrolyte'has'a'relatively'high'concentration'of'ammonium'chloride,'so'the'concentration'of'ammonium'ions'
in'the'thin'electrolyte'layer'may'be'regarded'as'constant'if'a'small'amount'of'NH3'permeates'the'membrane'and'
NH4+'is'formed'in'accordance'with'the'equation'given'above.'As'a'result,'the'concentration'of'ammonium'ions'can'
be'included'in'the'equilibrium'constant'K´.'
K´'='[OH-]'/'[NH3]''''or''''[OH-]'~'[NH3] (3)'
Applying'the'Nernst'equation'thus'results'in'the'following'dependency:'
''''''''''''E'='E0''-'S'log'[NH3] (4)'
E'='electrode'potential'
E0'='standard'electrode'potential'
S'='slope,'f'(T)'
pH dependence
In'accordance'with'the'above-mentioned'reaction'equation'(Equation'1),'ammonia'(NH3)'in'an'aqueous'solution'is'in'
a'pH-dependent'equilibrium'with'ammonium'ions'(NH4+).'This'dependence'is'shown'in'Figure'3.'
Fig. 3: pH dependence of the equilibrium between ammonia and ammonium ions

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AMMONIA User Manual
-Only'NH4+'ions'(ammonium)'are'present'at'pH'<7
-The'ratio'of'NH4+'ions'(ammonium)'to'NH3'(ammonia)'is'1:1'at'pH'9.3
-Only'NH3'(ammonia)'is'present'at'pH'>11
If'ammonium'ions'are'predominant'in'the'solution,'as'is'the'case'in'the'acidic'range,'then'they'must'be'converted'
into'ammonia'(NH3)'by'the'addition'of'a'strong'alkali'(e.'g.'NaOH,'adding'10'N'NaOH'solution'to'the'liquid'being'
measured'for'a'pH'> 11),'since'the'membrane'is'only'permeable'for'ammonia'(water'in'a'liquid'aggregate'or'ionic'
constituents'such'as'ammonium'ions'cannot'pass'through'the'membrane).'
Ammonia sensor membrane caps
The'advantage'of'the'ProMinent'sensor'for'ammonia'is'that'prefabricated'membrane'caps'are'available,'thus'
avoiding'the'manual'fitting'under'tension'of'the'sensitive'membrane.''
Concentration range
The'potentiometric'measurement'of'ammonia'shows'a'linear'characteristic'over'a'wide'range'of'concentration'on'a'
semi-logarithmic'plot,'as'is'indicated'in'the'following'conversion'table'for'various'units'of'concentration.'
mol/l%
ppm%as%N%
ppm%as%NH3%
5'x'10-7'
7'x'10-3'
8.5'x'10-3'
10-6
1.4'x'10-2'
1.7'x'10-2'
…'
…'
…'
10-1
1400'
1700'
1'
14000'
17000'
Table 1: Conversion table for various units of concentration
At'especially'low'levels'of'concentration,'the'response'time'can'be'considerably'longer,'as'shown'in'the'table'above.'
It'may'be'possible'to'improve'the'response'time'by'diluting'the'electrolyte'by'a'factor'of'10,'using'distilled'water.'
And,'particularly'at'high'concentration,'there'is'a'risk'that'readings'are'too'low'because'of'ammonia'losses.'Samples'
should'therefore'be'measured'as'soon'as'possible.''Loss'of'ammonia'can'be'reduced'by'a'cover'or'by'using'the'
apparatus'in'an'enclosed'vessel.''
ProMinent Ammonia Analyzer measurements
The'relationship'between'the'electrode'voltage'and'the'concentration'of'ammonia'in'water'is'stored'in'the'form'of'a'
typical'characteristic'(Figure'5).'The'ProMinent'analyzer'is'thus'able'to'calculate'the'ammonia'concentration'from'
the'electrode'voltage'measurement'and'display'the'result'directly'in'the'concentration'unit'“parts'per'million”'
(ppm)'on'the'analyzer'display.'''

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The'characteristic'curve'that'is'stored'in'the'transmitter'is,'of'course,'valid'for'certain'specified'conditions,'such'as'
the'composition'of'the'liquid'and'the'pH'value,'and'individual'sensor'characteristics'also'play'a'part.''If'conditions'
differ'from'those'specified,'or'different'electrodes'are'used,'then'this'will'affect'the''
displayed'value'for'the'concentration.''The'individual'characteristics'of'the'particular'sensor'are'allowed'for'in'the'
zero'point'calibration.'First'of'all,'the'sensor'voltage'is'measured'in'the'presence'of'ammonia,'and'the'curve'shown'
in'Figure'5.'is'shifted'accordingly.'The'slope'is'calculated'according'to'the'Nernst'equation.'This'requires'an'
automatic'temperature'measurement'with'a'Pt'100'sensor.'
Special aspects
Coloration'or'opacity'of'the'liquid'being'measured'does'not'affect'the'measurement.'Most'ionic'substances'in'the'
sample'will'also'have'no'effect,'since'they'cannot'pass'through'the'hydrophobic'membrane.'But'volatile'amines,'for'
instance,'may'affect'measurement.'These'include'various'substances,'e.'g.'methylamine,'ethylamine'and'hydrazine.'
Such'substances'also'exhibit'an'alkaline'reaction'in'the'sensor'electrolyte.'The'presence'of'such'substances'in'
addition'to'ammonia'leads'to'an'erroneously'high'concentration'reading.''
If'the'liquid'being'measured'contains'solvents'or'tensides'from'cleaning'agents'or'detergents'that'can'affect'the'
hydrophobic'properties'of'the'membrane,'then'measurements'should'be'made'in'a'gas'space'above'the'liquid.'This'
“head'space”'method'requires'that'the'ammonia'sensor'is'built'into'a'completely'gas-tight'fitting.'A'head'space'
measurement'is'also'advisable'if'oil'or'grease'is'present,'since'these'would'also'block'the'membrane'and'thus'
adversely'affect'the'response'time'of'the'electrode.'
The'sensor'membrane'is'very'delicate'and'must'not'be'touched'in'any'circumstances.'Cleaning'by'mechanical'means'
is'not'possible.'Measurements'cannot'be'performed'under'pressure,'because'the'compression'of'the'inevitable'air'
bubbles'in'the'sensor'electrolyte'can'cause'distortion'and'damage'to'the'inelastic'membrane.''

9
B. INSTALLATION & NAVIGATION
Panel is intended for wall mounting at a height where the analyzer can be easily viewed.
B.1 Plumbing
Inlet fitting is 3/8” hose barb and outlet connection and sample vents are 1/2” compression
tubing. The inlet source should be a representative sample from the process with the
following criteria:
Sample flow rate: Adjust needle valve to permit enough flow to allow flow switch to
actuate. Pressure range at the analyzer inlet: 45 psi
Pressure at the analyzer outlet: if not to drain then it should be lower than inlet
pressure. Water quality: Clear, not turbid
Maximum temperature: 40 deg C (104 deg F)
Note: Do not expose sensors to high pressures! Always open the downstream sample
shutoff and needle valves first before opening the upstream sample valve when
commissioning the unit. When turning off the sample stream close valves in reverse order
by first closing the upstream valve.

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B.2 Cabling – Wiring
B.2.1 Analyzer Wiring Terminals
Controllers consist of two circuit boards, a front Measure circuit board and a back Power board.
The front, Measure circuit board supports 7 sensor inputs & 8 digital Inputs.
It includes a 2 line x 16 character LCD display, USB Type ‘B’ jack and a microcontroller module.
S1 S2 T
Running
+DC Power
Output O P Q R S T
A & B
U V G+
Power IN
18 VDC
‘A’ ‘B’
RS485
4-20mA
Red Blk Wht Grn
Meter & Contact Set Inputs
‘+’
LCD Display
Control
Module
with
Optional
Ethernet
Jack
Optional
Sensor
Card
Socket
Optional
Sensor
Card
Socket
Sensors
‘C’ & ‘D’
Sensors
‘E’ & ‘F’
USB
‘B’ Size
Jack
Modem
Power
Expansion
Sensors
‘A’ & ‘B’
Sensor
‘G’ RJ45
Ethernet
Jack
Turbine
& Current
Loop
Power
Contact Head
& Turbine Meters
Flow & Level Switches
Optional
Modem
Cable to
Power
Card Measure Card

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B.2.1 Analyzer Wiring Terminals cont.
The back, Power circuit board has 5 ON/OFF Power Relays, 4 Variable Frequency Feed outputs
and the controller power supply.
The Ai, industrial version of the Aegis, includes an enclosure door mounted AC Power ON/OFF
switch.
L LM N N NEUTRALS
AC
A & B A & BA & B A & B A & B
AC POWER
AC RELAYS 1-3 AC RELAYS 4-5
RUN R1
NO
R2
NC NO
R3
NC NO
R4
NC NO
R5
NC NO
DC
P6
A B
P7
A B
P8
A B
P9
A B
FREQUENCY CONTROLS
115V
5 Power Relay
ON/OFF
Controls
4 Pump
Frequency
Controls
Line
Voltage
Select Relay
Fuse
To Measure Card
Power Card
Cable to
Measure
Card
AC Power
IN & fused
Auxiliary Power
OUT
Variable
Frequency
Pump
Controls
AC Power to
Solenoids,
Valves & Pumps
AC Power
cabling to
optional
door mounted
ON/OFF
A blue tinted electrical shield, secured by two thumbscrews, covers the terminals of the Power
board. Controllers may be supplied prewired with either 120VAC NEMA sockets or with an optional
plug box. Variable frequency pump control cables may be pre-wired.

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B.2.2 Wiring Rules
Analog Sensor Wiring
Analog sensors, contact sets, water meters and flowswitches may be cabled in a common conduit
without causing operational problems.
Do not mix AC Line, 120VAC & 240VAC wiring with any sensor or communications cable in a common
conduit. Grounded, metallic conduit is preferred in areas where variable frequency drives operate.
Sensor cables, with the exception of pH sensors, may be extended in paired AWG22, 0.25mm2 cable.
Ensure that cabling splices are accessible in conduit fittings or junction boxes.
Verify that the shields on contact head water meters are also spliced when meter cables are extended.
Ground cable shields at one end only to the internal frame lower bottom grounding screw.
Ethernet LAN Cabling
CAT5 LAN cabling is limited to a maximum of 300ft / 100m from controller to access hub.
Do not exceed this limit.
AC Controller Power
Power the controller using a dedicated, separate breaker in the local lighting-distribution panel.
Do not route the controller AC power in common conduit with variable frequency pump drives.
AC Power to Valves & Solenoids
Controller ON/OFF relays switch and power the AC line to valves & solenoids. Ensure that each valve &
solenoid has a dedicated neutral cable between the controller and the valve or solenoid. Do not share a
common neutral to multiple valves or solenoids.
Fractional Horsepower Chemical Feed Pumps
The controller ON/OFF relays are fused at 5 amps total which will power multiple solenoid driven
chemical feed pumps and solenoid coils. Fractional horsepower chemical feed pumps cannot be directly
powered by the controller. Use the controller 120VAC control output to switch a motor start relay with a
120VAC coil.
Fractional horsepower feed pumps are commonly used in high pressure boiler chemical feed
applications and waste water polymer feeds.
Typically the motor inrush current requires a dedicated breaker and separate AC feed from the controller
AC power breaker.

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B.3 Water Meters – Flowswitches – Contact Sets
Water meters, flowswitches and ‘dry’ contact sets are connected to input terminals ‘O’ through ‘V’ and a
ground terminal. 5VDC limited by 10K puts 1/2mA through a closed contact set.
Hall effect Turbines and Paddlewheel water meters are powered by the 15-22VDC analyzer supply,
thermally fused at 100mA.
S1 S2 T
+DC Power
Output
O P Q R S T
A & B
U V G+
4-20mA
Red Blk Wht Grn
Meter & Contact Set Inputs
Connecting Meters & Flowswitches
Upper, Measure Card
Dry Contact Set
Flowswitches
& Interlocks
Seametrics type
Turbine Water
Meters
Contact Head
Water Meters
Water Meters, Flowswitches and Contact
Sets may be connected any digital input 'O'
to 'V'
Black
Red
Red
Black
White
Red
Red
Analyzers are defaulted to
input ‘O’ as make-up meter
and input ‘S’ as the
flowswitch, operating
interlock
Connect cabling shields at the controller ends of the cable only, to any ground terminal either on the
Measure card or on the aluminum backplate, bottom, center

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B.4 Safety & Navigation
Safety Electrical Shock Hazard
Opening the Analyzer enclosure with the Analyzer plugged in, exposes the user
to AC line voltages on the lower of the two Analyzer circuit boards.
Ground the Analyzer AC power to the ground screw labeled and located on the bottom, right
of the aluminum backplate.
External, 120VAC socket or optional plug boxes are provided with Analyzers installed in North
America. Both are grounded to the ground screw labeled located on the bottom, center of the
aluminum backplate.
USER WARNING : CAUTION
Water Treatment Analyzers operate steam and water valves and may pump
hazardous, corrosive and toxic chemicals. Opening the Analyzer enclosure
exposes user to the risk of electrical shock at power line voltages.
Understand fully the implications of the control setpoints, interlocks and alarms
that you select. Harm to personnel and damage to equipment may result from
mis-application.
Unplug or turn OFF the AC power to the Analyzer if you have any concerns
regarding safety or incorrect Analyzer operation and notify supervisory staff.
YOUR ANALYZER
Ammonia Analyzers are supplied in many different configurations, part numbers
and sensor sets. Applications extend beyond water treatment.
The HELP section depicts the installation plumbing header showing the sensor
set supplied with your Analyzer. It also includes the information for terminating
the sensors supplied with your specific Analyzer part number.
The START-UP section is specific to your application and details modifying
the default Analyzer settings for your site.

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NAVIGATION
KEYPAD
If you get lost in a sub-menu, press EXIT & you’ll
stop what you’re doing & move back to the main
menu
An ENTER symbol on the display signals that
there are sub-menus available,
MAIN MENU
The sensors and controls in the main menu vary with your Analyzer part number and sensors
and pumps that you enable or disable.
The main menu groups sensors with the relays that they control.
Where are Sensors and Relays Connected?
You may modify the names of sensors and outputs but the Analyzer tags each input with a
letter A to Z and each output with a number 1 to 9 representing where each is wired.
Inputs A, B and G and O to V have fixed wiring terminals on the upper Analyzer board.
G is a temperature sensor
Inputs O to V may be individually selected to be digital inputs.
Terminals for outputs 1 to 5 are located on the lower board.
They are ON/OFF power relays that switch 120 or 230VAC.
Terminals for outputs 6 to 9 are also located on the lower circuit board.
They are electronic switches used for frequency control.
Inputs C-D and E-F are used for plug-in sensor cards which add optional 4-20mA inputs &
outputs to the Analyzer. The pH sensor and NH3 sensor are wired into the OP card as inputs
C-D, respectively.
Sensor inputs H to N and meter/contact set inputs W to Z don’t physically exist in the
Analyzer and are used to calculate other advanced Analyzer functions.
UP & DOWN to view options
or to EDIT numbers
Move RIGHT to select next
field when EDITing
ENTER to select an option
& to execute EDITing
EXIT to escape option,
info display or EDITing

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B.5 Browser
Analyzers with the ‘LB’ LAN-Browser option include a built-in command & control web server with
real time views of your Analyzer operation.
You can browse with Mozilla’s Firefox or Internet Explorer 7 over a 10BaseT Ethernet connection
or the internal modem, if installed.
If the ‘LB’ option is included in your Analyzer, the Browser appendix ‘LB’ has been added to this
manual
Sidebars: Are used to explain typical uses for feed and control functions.
Sidebars are at the bottom of the page detailing the function.
New users & users new to water treatment will find these explanations helpful.

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B.6 Communications
USB Services
All Ammonia Analyzers include a USB port which is used for three purposes:
1. Upload of logged data in XML format to a notebook PC or a PDA operating as a USB host.
2. Download of View-Configuration Sets into the analyzer.
3. Upload of the current controller configuration from the analyzer to support generation of View-
Configuration Sets and for controller cloning.
Configuration-View sets:
Controllers with the ‘LB’ Ethernet option are loaded with the ammonia view. It is selected when the
controller is manufactured to be the ‘as shipped’ view-configuration.
LAN TCP-IP:
The LB analyzer option adds a 10 Base T, RJ45 Ethernet port with a user assigned static IP. The controller
operates as an HTML micro-server for command & control using IE7 and Mozilla’s Firefox browsers.
Logged data is served as an XML file in response to an HTML request.
Modem:
The RM controller option adds a 57,600 baud micro modem that provides a PPP connection so that remote
users can browse the controller. AJAX supports the same graphical View interface used by on-site users.
B.7 Data Logging
Each enabled input and output is logged by the analyzer as a user set interval from 5 to 1440 minutes.
Each I/O can be independently logged at its own rate. The default rate for all I/O is 60 minutes with a 600
sample log size. Sensors log minimum, maximum and average. Water meters log volume. Contact sets log
time ON. Power relays and valves, log ON time in seconds.
Alarms are time & date stamped. The last 25 controller activities are time and date stamped with the user
ID.
Note: Data logging of relay ON time stops when AC fuse fails since without a fuse a relay
can’t power ON a valve or solenoid.

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C. MINIMAL START GUIDE
Safety:
Sensors are installed into pressurized piping.
Loose or improperly assembled fittings may leak water or chemicals.
Do not leave the analyzer turned ON unless you have configured it for the site’s
water treatment program & verified that auxiliary equipment is operating.
FYI: inserts ‘For Your Information’ explanations.
Here’s what we’re going to do:
Startup walks you through analyzer set-up step by step.
We’ll start by verifying each sensor.
First time users:
Have the analyzer user manual available to step you through
thecalibrate, configure and setpoint sequences.
If you have the ‘LB’ LAN-browser option installed, you can use
a notebook PC & Ethernet crossover cable to startup.
Refer to Appendix ‘H’ of the user manual if you haven’t set-up
your notebook to browse the analyzer
FYI: Your analyzer may have been pre-configured for this site.

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Minimum Startup Sequence
Valve ON flow: 1
Open the downstream isolation valve on the sensor mount manifold header
and then the upstream isolation valve.
FYI: Always OPEN in this order & CLOSE upstream first.
Check for leaks: 2
Inspect the sensor entries for leaks & correct.
Check that installation fittings are not leaking.
Verify Flowswitch: 3
Plug-in or power up the analyzer. Scroll UP or DOWN to the ‘S’ Flowswitch_S display
and ensure that within 30 seconds of power ON the flowswitch shows ON.
Don’t proceed until the flowswitch shows ON.
Check Temperature: 4
Scroll UP or DOWN to the sensor ‘G’ Temperature_G display & check that
it’s displaying the approximate temperature, +/-10F.
FYI: Temperature needs to be accurate. We’re using it to compensate ammonia,
so it has to track, changing when the sample water changes temperature.
Calibrate pH: 5
Scroll UP or DOWN to the sensor ‘C’ pH_C display
Measure the water pH at the sensor sample valve
and calibrate the pH sensor per Appendix E.
Calibrate NH3: 6
Scroll UP or DOWN to the sensor ‘D’ NH3 Sensor_D display
Measure the water NH3 at the sensor sample valve
and calibrate the NH3 sensor per Appendix E.
Correct for Time Zone: 7
Key EXIT to the Day – Time display.
If necessary, key ENTER scroll to Time&Date & adjust the time for your time zone.
FYI: Sets the time & date stamp correctly for timed data logging

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Minimum Startup Set Alarms
Set pH Alarms: 8
Scroll UP or DOWN to the sensor ‘C’ pH Sensor_C display
Key ENTER to Alarms and adjust both High Alarm and Low Alarm.
Set ammonia alarms: 9
Scroll UP or DOWN to the sensor ‘D’ NH3 Sensor_D display
Key ENTER to Alarms and adjust both High Alarm and Low Alarm.
24/7 Sites, Set Flowswitch Alarm: 10
Scroll UP or DOWN to the ‘S’ Flowswitch_S display.
Key ENTER to Alarms and adjust No Flow Alarm.
FYI:A No Flow alarm indicates no flow past the measuring sensors.