Hanna Instruments BL 7916 User Manual
Instruction Manual
BL 7916 • BL 7917
pH and ORP
Measuring & Dosing
System
www.hannainst.com
Dear Customer,
Thank you for choosing a Hanna product.
Please read this instruction manual carefully before using the pump.
If you need additional technical information, do not hesitate to e-mail
us at tech@hannainst.com.
These instruments are in compliance with the directives.
WARRANTY
All Hanna Instruments pumps are warranted for one year against defects in
workmanship and materials when used for their intended purpose and maintained
according to instructions. This warranty is limited to repair or replacement free of
charge. Damages due to accident, misuse, tampering or lack of prescribed maintenance are not covered. If service is required, contact the dealer from whom you
purchased the instrument. If under warranty, report the model number, date of
purchase, serial number and the nature of the failure. If the repair is not covered by
the warranty, you will be notified of the charges incurred. If the instrument is to be
returned to Hanna Instruments, first obtain a Returned Goods Authorization Number from the Customer Service department and then send it with shipment costs
prepaid. When shipping any instrument, make sure it is properly packaged for
complete protection.
TABLE OF CONTENTS
PRELIMINARY EXAMINATION ........................................................ 3
GENERAL DESCRIPTION ................................................................ 4
FLOW RATE CHART .......................................................................5
FUNCTIONAL DESCRIPTION BL 7916 ............................................ 6
FUNCTIONAL DESCRIPTION BL 7917 ............................................ 7
SPECIFICATIONS........................................................................... 8
VALVE / HOSE ASSEMBLY DIAGRAM............................................. 9
MECHANICAL DIMENSIONS ........................................................ 10
INSTALLATION ........................................................................... 11
OPERATIONAL GUIDE ................................................................. 18
pH CALIBRATION ....................................................................... 22
TROUBLESHOOTING GUIDE ........................................................ 23
MAINTENANCE ........................................................................... 24
ELECTRODE CONDITIONING AND MAINTENANCE ........................... 26
TAKING REDOX MEASUREMENTS ................................................. 30
CHEMICAL COMPATIBILITY GUIDE................................................ 32
ACCESSORIES ............................................................................. 34
CE DECLARATION OF CONFORMITY.............................................. 38
PRELIMINARY EXAMINATION
Remove the pump from the packing material and examine it carefully
to make sure that no damage has occurred during shipping. If there
is any noticeable damage, notify your Dealer.
Each pump is supplied complete with:
• discharge and suction valves
• LDPE tubing, 7 m (23')
• power cord
• instruction manual
Note: Save all packing material until you are sure that the pump
functions correctly. Any defective item must be returned in the
original packaging together with the supplied accessories.
READ THE INSTRUCTIONS ATTENTIVELY
BEFORE INSTALLING OR OPERATING YOUR PUMP
The BL electronic dosing pumps are easy to use. We recommend,
however, that you read the entire manual before using the pump.
Familiarity with the features and controls of the unit will give you a
better idea of the dosing potential and help reduce operator errors.
Please operate the pump only as directed in the instruction manual.
Follow all general safety guidelines during operation.
Remember: electrical devices are potentially hazardous. Check that the
voltage of the installation matches the voltage indicated on the
specification label on the back of the pump.
Note: It is the responsibility of the user to install and ground the
pump properly; it is highly recommended to install an external
switch.
Each pump is protected by a 1 A/250 V fuse that is located together
with 1 spare in a drawer on the power socket under the pump.
Always store chemicals in safe, out of reach places. Follow the
directions for use with each chemical. Do not assume chemicals are the
same because they look alike. Hanna Instruments cannot be held
responsible for the misuse of chemicals or the pump.
Always wear protective clothing (gloves and safety glasses) when
working near chemical dosing pumps. When pumping chemicals,
make sure all tubes are securely attached to the fittings. It is
recommended that tubing is shielded to prevent possible injury in
case of rupture or accidental damage.
Avoid using a pipe wrench or pliers on plastic parts and connectors.
2
3
These are best tightened with an open end or crescent wrench. Avoid
overtightening these parts as this could cause damage to the seats
and threads.
If a hose is used, it should be securely fastened to columns, walls,
braces, etc. This will ensure that the hose connection will remain tight
and leak free. Shield the hose from direct sunlight. Sunlight can
cause an autocatalytic reaction with some chemicals and weaken the
hose walls.
The arrow on the pump head indicates the direction of chemical flow
and should always point upwards (vertically). Never position the
pump horizontally with suction and discharge valves horizontal.
Locate the pump in an area out of the reach of children and pets.
All pumps undergo stringent tests to ensure that they comply with
their stated specifications and are calibrated at the maximum rated
pressure.
Unplug the instrument from the power supply before
replacing the fuse or making any electrical connections.
FLOW RATE CHART
The following chart shows the inverse relationship between flow rate
and pressure.
GENERAL DESCRIPTION
The BL 7916 and BL 7917 Control/Pump System offer respectively a
pH and ORP monitoring system with proportional control of a
diaphragm pump and an LCD readout.
Features include:
• Two advanced instruments in one compact unit
• Proportional control for precisely maintained set-points
• Rugged construction with a one-piece casing and a transparent cover to protect controls and terminals
• Chemically resistant non-clogging pump head and superior
materials for all components in contact with the chemicals
being dosed (see page 32 for details)
• Convenient installation with all controls on front panel
• A solenoid-driven pump
• Automatic overheat protection and a built-in LCD display
• Alarm output: the alarm of the BL 7916 will be activated if
the measured pH value is 2 pH units higher or lower than the
setpoint. BL 7917's alarm will activate if the mV value is
200mV higher or lower than the setpoint.
• Auxiliary dosing contacts. This will drive other equipment such
as mixers, priming pumps, etc.
4
The table below shows typical reduction of the flow rate with an
increase of pressure. The pump supplied with the system has a
capacity of 13.3 LPH (3.5 GPH) at 0.5 BAR (7.4 PSI).
BL 7916 / BL 7917
FLOW / PRESSURE
BAR (PSI) LPH (GPH)
0.5 (7.4)
1.0 (14.7)
2.0 (29.4)
3.0 (44.1)
4.0 (58.8)
13.3 (3.46)
11.7 (3.04)
10.1 (2.63)
9.0 (2.33)
7.8 (2.03)
5
FUNCTIONAL DESCRIPTION BL 7916
FUNCTIONAL DESCRIPTION BL 7917
1. Discharge Valve Assembly
2. Pump head
3. Suction Valve Assembly
4. Hose
5. Liquid Crystal Display
6. Offset Calibration Trimmer
7. Setpoint Adjustment Trimmers (FINE and COARSE)
8. Slope Calibration Trimmer
9. Acid/Base Selection Switch
10. Display Mode Selection Switch (SET or MEASURE)
11. Terminal Connections
12. BNC Connector for pH electrode
13. Overheating LED
14. Power Socket and Fuse Holder
15. Cable Glands
Unplug the instrument from the power supply before
replacing the fuse or making any electrical connections.
6
1. Discharge Valve Assembly
2. Pump head
3. Suction Valve Assembly
4. Hose
5. Liquid Crystal Display
6. Setpoint Adjustment Trimmers (FINE and COARSE)
7. Reduction/Oxidation Selection Switch
8. Operating Mode Selection Switch (SET or MEASURE)
9. Terminal Connections
10. BNC Connector for ORP electrode
11. Overheating LED
12. Power Socket and Fuse Holder
13. Cable Glands
Unplug the instrument from the power supply before
replacing the fuse or making any electrical connections.
7
SPECIFICATIONS
BL 7916D BL 7916U
Range 0.00 to 14.00 pH
Resolution 0.01 pH
Accuracy (@20°C/68°F) ±0.01 pH
Typical EMC Deviation ±0.1 pH
Input Impedance 10¹² Ohm
Dosage Proportional, acid or base, user selectable
Dosing Contact Isolated, 2A, Max. 240V, resistive load, 1,000,000 strokes
Alarm Contact Isolated, 2A, Max. 240V, resistive load, 1,000,000 strokes
Calibration Offset: ±1 pH with trimmer
Slope: 85 to 115% with trimmer
Recorder Output 4 to 20 mA (isolated)
Power Supply 230 Vac ±15% 115 Vac ±15%
50/60 Hz (40 W) 50/60 Hz (40 W)
Environment 0 to 50°C (32 to 122°F);
RH max 95% non-condensing
Dimensions 221 x 142 x 181 mm (8.7 x 5.6 x 7.1'')
Weight Approximately 5 kg (11 lb.)
BL 7917D BL 7917U
Range -999 to +999 mV
Resolution 1 mV
Accuracy (@20°C/68°F) ±5 mV
Typical EMC Deviation ±6 mV
Input Impedance 10¹² Ohm
Dosage Proportional, oxidizing or reducing, user selectable
Dosing Contact Isolated, 2A, Max. 240V, resistive load, 1,000,000 strokes
Alarm Contact Isolated, 2A, Max. 240V, resistive load, 1,000,000 strokes
Recorder Output 4 to 20 mA (isolated)
Power Supply 230 Vac ±15% 115 Vac ±15%
50/60 Hz (40 W) 50/60 Hz (40 W)
Environment 0 to 50°C (32 to 122°F);
RH max 95% non-condensing
Dimensions 221 x 142 x 181 mm (8.7 x 5.6 x 7.1)
Weight Approximately 5 kg (11 lb.)
VALVE / HOSE ASSEMBLY DIAGRAM
NECK
8
9
MECHANICAL DIMENSIONS
110mm
m
"
1
m
"
110mm
8.70"
INSTALLATION
The Controller/Pump series of instruments are enclosed in a modular
housing for maximum protection. The dimensioned illustrations show
the layout of the Controller/Pumps and how they utilize the one-piece
polypropylene, injection-molded housing. Since there are no joints or
screws holding different sections of the housing together, the case is
extremely rugged and sturdy.
BOTTOM VIEW
181m
164mm
6.45"
17mm
.67"
142m
5.60
7.13
29mm
5.08"
99mm
3.90"
5mm
0.19"
4.33"
55mm
2.16"
204mm
221mm
4.33"
FRONT VIEW
pH
8.03"
Materials Needed
• LDPE hose (7 meter/22 feet) (included) or other type of tubing
(PTFE, for example) more suitable for a specific application
(optional)
• Power cord (included)
Optional Accessories
• 4 each, ceramic weights (HI 721008)
• 1 each, foot valve assembly (HI 721005)
• 1 each, injection valve assembly (HI 721004)
Location
A suitable location should:
• be near to a power source
• be conveniently close to the injection point
• allow easy access to the flow rate control and pipe or hose
connections
• be no more than 1.5 meters (5 feet) above the operating
position of the suction valve assembly.
Dimensions for Installation
BlackStone Pumps are designed for permanent installation.
The pump can be mounted directly on a wall or tank (see page 10 for
the specific mounting dimensions).
Power Requirements
BlackStone pumps are designed to operate to specifications within the
following voltage ranges:
100 - 130 Volts for 115 Vac models
200 - 250 Volts for 230 Vac models
10
11
To ensure maximum performance, check the voltage at the point of
-
supply to verify that it is sufficient. It is recommended that you install a
1 Amp circuit breaker between the pump and the power supply. This
will give additional protection to the internal circuit and provide a
convenient way to disconnect the power supply prior to servicing the
pump, if needed.
Injection Point
• Choose an injection point that allows you to mount the
injection valve assembly vertically.
• The spring in the injection valve assembly (HI 721004) adds
approximately 1.5 bar of back pressure. If pumping into a
high back pressure, the spring should be removed.
Other Considerations
• If you are mounting the system to a wall, column, etc., be sure
it is strong enough to support the weight of the entire system.
• The ambient temperature of the pump, when in operation,
should be between 0 and 50°C (32 to 122°F) and should be
protected from direct exposure to outdoor elements (direct sunlight, rain, extreme temperatures, high humidity, etc.).
• Generally speaking, the shorter the suction distance, the more
efficient the pump operates.
• The pump should be placed in a conventional location that will
allow easy access to the control and connections. It should be
placed so that regular visual inspections of the connections and
hoses are facilitated.
Vertical Surface Mounting
Once you have selected the best installation site, simply screw or bolt
the unit into a wall or mounting panel above the chemical feed tank.
The 4 mounting screw holes on the pump will accommodate up to a 5
mm (3/16") screw or bolt (remember to use heavy screws or bolts to
secure the system). Be sure you do not over tighten and cause excessive
stress on the mounting holes.
Make sure to leave a slight overhang in front to allow for the
connection cable.
Power Supply
Connect the power cord to the female socket of the pump and by doing
so also grounding it. The power socket contains a 1 A/250 V fuse.
Since there is no on/off switch, it is suggested to install an outside
switch.
Probe connections
Connect the pH/ORP electrode to the BNC socket of the pump.
Permanent Connection using 3/8" PVC
pipe
All piping for the pump feed and discharge should be plumbed to the location
of the pump.
The threads on both valve assemblies
allow the use of standard 3/8" (European) pipe fittings for permanent pipe
connections.
Diagram for Rigid Pipe Hose
UNION C ONNECTION
ADAPTER
DISCHARGE VALVE
PUMP
SUCTION V ALVE
ADAPTER
FOOT V ALVE
FILTER
The foot valve assembly (HI 721005)
should always hang vertically and not
lay horizontal on the bottom of the tank
or drum.
A vertical assembly will ensure that the
valve is positioned properly and prevent
loss of prime.
For the US standard installations, use
PVC adapters to connect the suction and
discharge valves to the PVC pipe.
12
13
Loading...