Hanna Instruments Groline HI981412 User manual

INSTRUCTION MANUAL
HI981412
pH Dosing System

All rights are reserved. Reproduction in whole or in part is prohibited without the written consent of the
copyright owner, Hanna Instruments Inc., Woonsocket, Rhode Island, 02895, USA.
Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before using this instrument.
This manual will provide you with the necessary information for correct use of this
instrument, as well as a precise idea of its versatility.
If you need additional technical information, do not hesitate to e‑mail us at
[email protected] or view our contact list at www.hannainst.com.
Dear
Customer,

3
TABLE OF CONTENTS
TABLE OF CONTENTS
1. PRELIMINARY EXAMINATION ............................................................................................... 4
2. SAFETY MEASURES............................................................................................................. 5
3. ABBREVIATIONS ................................................................................................................ 5
4. SPECIFICATIONS................................................................................................................. 6
4.1. HI981412 pH DOSING SYSTEM ................................................................................. 6
4.2. HI10063 pH & TEMPERATURE PROBE........................................................................ 7
5. DESCRIPTION..................................................................................................................... 8
5.1. GENERAL DESCRIPTION & INTENDED USE................................................................... 8
5.2. FUNCTIONAL & DISPLAY DESCRIPTION........................................................................ 9
6. INSTALLATION.................................................................................................................. 13
7. SETUP............................................................................................................................. 21
8. PUMP CONTROL ............................................................................................................... 27
8.1. AUTOMATIC CONTROL TYPES.................................................................................... 27
8.2. PRIMING THE PUMP................................................................................................ 28
9. EVENTS MANAGEMENT ..................................................................................................... 29
9.1. ALARMS................................................................................................................. 29
9.2. WARNINGS............................................................................................................. 30
9.3. SUMMARY OF GENERAL BEHAVIOR .......................................................................... 30
10. CALIBRATION ................................................................................................................. 31
10.1. pH CALIBRATION................................................................................................... 31
10.2. PROCESS pH CALIBRATION .................................................................................... 33
10.3. CLEAR CALIBRATION.............................................................................................. 34
11. MEASUREMENT.............................................................................................................. 35
12. ERROR MESSAGES.......................................................................................................... 36
13. MAINTENANCE ............................................................................................................... 37
13.1. ELECTRODE CARE & MAINTENANCE......................................................................... 37
13.2. PUMP TUBING REPLACEMENT................................................................................ 37
14. ACCESSORIES................................................................................................................. 39
CERTIFICATION...................................................................................................................... 41
RECOMMENDATIONS FOR USERS............................................................................................ 42
WARRANTY ........................................................................................................................... 42

4
PRELIMINARY EXAMINATION
1. PRELIMINARY EXAMINATION
Remove the instrument and accessories from the packaging and examine it carefully. For further
assistance, please contact your local Hanna Instruments Office or email us at [email protected].
Each HI981412 is available in multiple configurations: controller and probe - HI981412-00,
kit for in-line mounting - HI981412-10, kit for flow cell mounting - HI981412-20.
Each instrument is delivered in a cardboard box and supplied with:
HI981412-00,
without mounting kit
• HI10063 pH/temperature probe
• 4.01 pH Buffer solution, 20 mL (3 pcs.)
• 7.01 pH Buffer solution, 20 mL (3 pcs.)
• Power connection cable
• Instrument & electrode quality certificates
• Instruction manual
HI981412-10,
with in-line mounting kit
• HI10063 pH/temperature probe
• Controller aspiration filter
• Controller injector, 1/2” thread
• Saddle for Ø 50 mm pipe (2 pcs.)
• PVC aspiration tubing (flexible) (5 m)
• PE rigid dispensing tubing (for pump to injector) (5 m)
• 4.01 pH Buffer solution, 20 mL (3 pcs.)
• 7.01 pH Buffer solution, 20 mL (3 pcs.)
• Power connection cable
• Instrument & electrode quality certificates
• Instruction manual
HI981412-20,
with flow cell mounting kit
• HI10063 pH/temperature probe
• Flow cell for HI981412
• Mounting panel assembly for HI981412
• Controller aspiration filter
• Controller injector, 1/2” thread
• Saddle for Ø 50 mm pipe (3 pcs.)
• PVC aspiration tubing (flexible) (5 m)
• PE rigid dispensing tubing (for pump to injector) (15 m)
• Barbed tubing adapter (1/2” to 6mm) (2 pcs.)
• Flow cell valve (2 pcs.)
• 4.01 pH Buffer solution, 20 mL (3 pcs.)
• 7.01 pH Buffer solution, 20 mL (3 pcs.)
• Power connection cable
• Instrument & electrode quality certificates
• Instruction manual
Note: Save all packing material until you are sure that the instrument works correctly. Any damaged
or defective item must be returned in its original packing material with the supplied accessories.

5
SAFETY MEASURES
2. SAFETY MEASURES
• Always disconnect the pH pump controller from power when making electrical
connections.
• Do not run other cables with the power cabling.
• Do not touch the metallic part. Hot surface.
3. ABBREVIATIONS
FDA Food and Drug Administration
LED Light Emitting Diode
PE Polyethylene
PVC Polyvinyl Chloride
REDOX Reduction & Oxidation
SPDT Single Pole Double Throw
ABBREVIATIONS

6
SPECIFICATIONS
4. SPECIFICATIONS
4.1. HI981412 pH DOSING SYSTEM
Range * 0.00 to 14.00 pH
-5.0 to 105.0 °C (23.0 to 221.0 °F)
Resolution 0.01 pH
0.1 °C (0.1 °F)
Accuracy
@ 25 °C (77 °F)
±0.10 pH
±0.5 °C (±0.9 °F)
Calibration
• User calibration:
automatic, one or two-point with buffer solution (4.01, 7.01, 10.01 pH)
• Process calibration:
single point, adjustable (±0.50 pH around measured pH)
Temperature
compensation Automatic
High or Low mode
Operation
pump control
• On/Off control using adjustable set point (4.00 - 10.00 pH)
with adjustable hysteresis (0.10 to 1.00 pH)
• Proportional control using adjustable set point (4.00 - 10.00 pH)
with adjustable proportional band (0.10 to 2.00 pH)
• Startup delay timer at power-on (0 to 600 sec.)
• Pump flow control 0.5 to 3.5 Liter/hour (0.13 to 0.92 Gallon/hour) and
maximum output pressure 1 atm (14 psi)
• Manual control for pump priming (defined in setup)
pH alarms
• High & Low with enable or disable option
• Triggered after 5 sec. if the controller records consecutive readings
over or under threshold values
• Level with enable or disable option
• Overtime protection (1 to 180 min. or Off)
Controller
alarm system
• Intuitive alarm system, using red, yellow and green color coded backlight
• User-selectable, alarm setup options
Alarm relay output • SPDT 2.5A / 230 Vac
• Activated by pH-selectable alarm conditions
Probe input • Quick connect DIN connector
• Galvanic isolation
* The range may be limited by the probe’s limits.

7
SPECIFICATIONS
Level sensor input
(Digital input)
• External switches can be attached to stop the pump and activate the
alarm (low reagent level) when the switch is open and level alarm is
configured in Setup
• Galvanic isolation
Power supply 100 - 240 Vac, 50/60 Hz
Power consumption 15 VA
Environment 0-50 °C (32-122 °F), max. 95% RH non-condensing
Dimensions 90 x 142 x 80 mm (3.5 x 5.6 x 1.8”)
Weight 908 g (36 oz)
Casing Wall mounted, built-in pump, IP65 rated
4.2. HI10063 pH & TEMPERATURE PROBE
Range 0 to 12 pH
Reference Double junction
Junction Cloth
Temperature sensor Yes
Temperature range -5 to 70 °C (23 to 158 °F)
AmpHel®Yes
Matching pin Yes
Body PVDF (white)
Top thread 3/4” NPT
In-line mounting thread 1/2” NPT
Cable length 2 m
Connector Quick connect DIN connector
Maximum pressure @ 25 °C (77 °F) 3 bar (43.5 psi)

8
DESCRIPTION
5. DESCRIPTION
5.1. GENERAL DESCRIPTION & INTENDED USE
HI981412 pH Dosing System is part of Hanna Instruments Groline family and features a pH controller
with peristaltic dosing pump and a process sensor.
Maintaining the correct pH of plant soil or hydroponic nutrient solution is an ongoing task. Macro
and micro nutrients as well as calcium and magnesium bloom boosters require the correct pH for
absorption into the plants root system.
The HI981412 Groline pH Dosing System, easily assimilates into a nutrient/fertilizer system
for soil and hydroponics. It precisely monitors the pH using the HI10063 pH/temperature probe;
and simultaneously controls the addition of acid or base (Up and Down reagents) using On/Off or
proportional control to fine tune and maintain the optimum pH. Growers can define the ideal set point
for pH. The HI981412 is a small dosing controller and can be easily setup for a stand-alone nutrient
reservoir or be part of a modular control scheme with the HI981413 Groline Nutrient Dosing controller.
To obtain a representative sample pH, the probe should be located at a spot that experiences
good circulation. The probe can be used in a “sample pot” or reservoir or installed in a flow cell or
recirculation line; perfect for drain-to waste or recirculating systems.
Main Features
• Easy to read LCD display with intuitive, color-coded backlight
• Automatic Temperature Compensation: all readings are compensated for variations in temperature.
Temperature is displayed in °C or °F along with pH reading. The pH probe contains an integral
temperature sensor to simplify installation.
• High and low alarms: warn the user when the nutrient solution is out of desired range by blinking
the LCD backlight red, disabling the pump, and deactivating the alarm relay
• Built-in peristaltic pump with On/Off or Proportional control
• Manual control for pump priming
• Overfeed protection using the overtime safety timer
• Resumes dosing on restart in case of power failure
• IP65 rated enclosure designed to withstand harsh environments
• Level input to stop control when nutrient levels are low
• Wall-mounted design
• User selectable languages
• Extremely easy to calibrate and use (prepackaged calibration standards)
The HI981412 Groline pH Dosing System is engineered to be an inexpensive solution for the
horticulturist to have real-time monitoring and control of nutrient solutions, to obtain and maintain
the ideal pH for optimum results at all times.

9
DESCRIPTION
5.2. FUNCTIONAL & DISPLAY DESCRIPTION
Front Panel
CAL
MENU
pH Dosing
System
1. Keypad area
2. CAL key – Press calibration key to enter calibration mode.
3. MENU key – Press menu key to enter setup mode and move through the menu. Long press menu
key to exit the menu and return to measurement.
4. Acid (or base) dosing pump
5. LCD display
6. Arrow keys – When in measurement mode, press the two arrow keys together to prime the pump.
– When in menu mode, adjust settings.
– When in menu mode (Control screen), press the arrow keys together and a
10 seconds pump test will start.
Liquid Crystal Display (LCD)
1
2
3
4
5
6
7
8
1. Stability indicator
2. Mode tags
3. Dosing pump icon
4. Status indicators
5. Measurement unit
6. First LCD line, measurement line
7. Second LCD line, temperature and message area
8. Temperature units

10
DESCRIPTION
Internal Rear Panel
Use a Phillips head screwdriver and remove the four screws, pull back the cover and remove it.
To replace the rear panel, insert the four legs back in place and tighten the four screws that secure the
panel to the enclosure.

11
DESCRIPTION
Alarm Relay, Power & Level Sensor
ALARM RELAY OUTPUT
SPDT 2.5 A / 230 Vac
NO Normally Open
COM Common
NC Normally Closed
NO COM NC
Pump controller not powered
or
Alarm condition
NO COM NC
Working condition with no alarm
POWER INPUT
LLine
PE Protective Earth
NNeutral
LEVEL SENSOR Low level sensor in tank

12
DESCRIPTION
4
5
6
7
Position Description
1 Tubing fittings
2 Sensor input
3 Cable gland for level sensor
4 Drainage opening
5 Cable gland for alarm cable
6 Cable gland for power cable
7 Enclosure cap
Cabling safety measures. Qualified personnel should perform wiring only.
• A disconnect switch must be installed to break all current carrying conductors. Turn off
power before working on conductors.
• Always disconnect the pump controller from power when making electrical connections.
• Do not run other cables with the power cable through the cable gland.
• Always run all cables through cable glands to maintain IP65 rating and block unused
holes with cable seal plugs.

13
INSTALLATION
6. INSTALLATION
General Guidelines
• Select controller location so that it is shielded from direct sunlight, dripping water and excess vibrations.
• Select the acid-dosing injector point away from the sampling point to prevent acids from damaging
the probe or triggering an alarm.
• Keep flow rate as constant as possible for optimum sensor operation.
• Install cable gland fittings and plugs, to properly seal the pump controller.
• The probes are easily installed using 1/2” NPT threads for in-line or flow cell installation, and 3/4”
NPT thread for reservoir immersion installation.
• Ensure all tubing, cables, saddles and fittings are properly connected.
Note: HI981412 Groline pH controller is shipped with two types of tubing, for both flow cell and
in-line configurations:
- rigid tubing for outlet (dispensing) - connects the pump output to the injector
- flexible tubing for inlet (aspiration) - connects the filter to the pump inlet
Wiring Guidelines
Running cables through cable glands
• Unscrew the gland nut and remove the cap.
• Thread cable through outer opening of proper gland nut, through the seal, and into case.
• After connecting to terminal, reinsert seal and tighten nut on the threaded gland.
Connecting cables to the internal terminals
• Using a screwdriver, connect the cable leads to the appropriate terminal.
• Following the printed lead markings (L, PE, N for power supply; NO, COM, NC for relay; level sensor
if required) ensure the leads are wired to the correct position.
Installation Steps
1. Check the acid tank level.
2. Calibrate the pH probe before installing in the system.
3. Mount the probe into saddle or into a flow cell.
4. Connect the aspiration tubing between the chemical tank and the pump’s inlet.
5. Connect the dispensing tubing between the pump and injector.
6. Check the level sensor’s functionality (if used).

14
INSTALLATION
Possible Installation Schemes for a Recirculating System
In-Line Installation, Overview & Parts Table
Below is an illustrated reference of a generic in-line installation scheme with the relevant components.
Note: Injectors prevent back flow into reagent tank.
Position Description
1 pH probe
2 Flexible PVC tubing
3 Rigid PE tubing
4 Aspiration filter
5 Injector, 1/2” thread
6Saddle for Ø 50 mm pipe, using 1/2” thread

15
INSTALLATION
Flow Cell Installation, Overview & Parts Table
Below is an illustrated reference of a generic flow-cell installation scheme with the relevant
components. The maximum pressure of the flow cell system is 3 atm (44 psi).
Position Description
1 pH probe
2 Flow cell and adapter
3 Mounting panel
4 Flexible PVC tubing
5 Rigid PE tubing
6 Aspiration filter
Position Description
7 1/2” to 6 mm adapter for tubing
8 Valve to control flow-cell flow
9 Injector, 1/2” thread
10 Nipple, 1/2” - 1/2”
11 Saddle for Ø 50 mm pipe, using 1/2” thread

16
INSTALLATION
Reservoir Immersion Installation
Detailed below a representation of a reservoir immersion installation scheme together with the
relevant components and the pH probe screwed into the threaded end of a user supplied pipe and
fastened with a bracket.
Position Description
1 Electrode holder tube
2 Bracket (user supplied)
3 Reservoir
4 Electrode

17
INSTALLATION
Mounting Recommendations for Saddle
• Select required drill size. See table for dimension details.
Pipe
Drill
• Place the upper part of the saddle (3) on top of the
pipe (5) with the seal (4) placed over the hole.
• Take the lower part of the saddle (6), together with
inserted nuts (7) and align it under the upper part.
• Insert the screws (1) with washers (2) through the
holes and tighten by hand into the mounted nuts.
• Using a wrench, tighten all screws carefully.
Saddle for probe & injector Thread size Drill size
Ø 50 mm pipe ½” thread 20 mm - 25.4 mm / 0.79” - 1.00”
Ø 63 mm pipe ½” thread 20 mm - 25.4 mm / 0.79” - 1.00”
Ø 75 mm pipe ½” thread 20 mm - 25.4 mm / 0.79” - 1.00”
Connecting the Probe to the Pump Controller (In-line Configuration)
The probe should be connected to the controller and calibrated before
installation.
To avoid twisting the cable, unplug probe from socket temporarily while
installing in saddle.
Insert the probe and screw it carefully into the saddle, taking care not to
damage the O-ring. Tighten the probe enough to ensure a tight seal.

18
INSTALLATION
Installing Aspiration Filter
The aspiration filter is used in the reagent tank to filter
and prevent debris from entering the tubing.
• Cut required length of aspiration tubing (flexible)
to reach between peristaltic pump inlet and
aspiration filter.
• Place the end of tubing on the filter.
• The compression fitting has to be screwed until
secured on the filter.
• Slide the compression fitting from the peristaltic
pump inlet onto the tubing.
• Slide the end of tubing over the fitting of the
peristaltic pump tubing.
• Slide compression fitting up over tubing.
• Tighten the fitting.
Installing Injector
• Cut the required length of dispensing (rigid) tubing to reach between injector saddle and outlet of
peristaltic pump.
• Place the compression fitting nut on the tubing.
• Place the end of tubing on the injector.
• The compression fitting has to be screwed until secured on the injector.
• Screw the injector in the saddle.
• Slide compression fitting from pump tubing onto tubing.
• Slide the end of tubing over fitting of pump tubing.
• Slide compression fitting over tubing.
• Secure and tighten the fitting.

19
INSTALLATION
Flow Cell Installation
In a flow cell configuration, the water flows from the inlet valve to the flow cell and returns in the line
via the outlet valve.
To prepare the inlet and outlet valve assemblies, as illustrated in the drawing:
• Mount the saddle for flow cell inlet and outlet valve, follow mounting recommendations for saddle.
• Sparingly lubricate two O-rings (2) with a thin film of grease and mount them on the nipple (1)
on both sides.
• Screw the nipple in the saddle (3).
• Screw the valve (4) into the open end of the nipple mounted into the saddle. Make sure it is tight
and the lever is forward facing so that it can be operated.
• Carefully screw the straight tubing fitting (5) into the valve, taking care not to damage the O-ring.
• Insert the tubing (6) in the straight tubing fitting (5).
Position Description
1 Nipple
2 O-ring
3 Saddle
4 Valve
5 Tubing fitting
6 Tubing
6
5
4
2
2
3
1

20
INSTALLATION
Connecting the Probe to the Pump Controller (Flow Cell Configuration)
• Remove the protective cap and verify if the O-ring (2) is in place.
• The probe should be connected to the controller and calibrated before installation.
• To avoid twisting the cable, unplug probe from socket temporarily while installing in flow cell.
• Carefully insert the probe (1) into the flow cell adapter (3), paying attention not to damage the
O-ring. Tighten the probe enough to seal in place.
• Cut the tubing (7) to reach between the inlet valve mounted on the pipe and the flow cell inlet.
Push the end of the tubing (7) into the elbow tubing fitting.
• Repeat the previous step for flow cell outlet pushing the tubing (5) into the elbow tubing fitting (4).
Position Description
1 Probe
2 O-ring
3 Flow cell adapter
4 Elbow tubing fitting
5 Tubing
6 Elbow tubing fitting
7 Tubing
Note: Prepare and calibrate the probe prior to installing in the flow cell.
1
OUT
IN
2
3
4
5
6
7