Hanna Instruments PL 100 User Manual
PL 100 / PL 101PL 100 / PL 101
PL 100 / PL 101
PL 100 / PL 101PL 100 / PL 101
Amperometric
Chlorine Titrators
Instruction Manual
Dear Customer ,
Thank you for choosing a Hanna Product.
This instruction manual has been written for the following products:
PL 100 Free Chlorine T itrator
PL 101 T otal Chlorine T itrator
Both the instruments have features such as recorder outputs, 12VDC power supply for
safety and reduction of EMI and built-in stirrer .
Please read this instruction manual carefully before using the instrument. It will provide
you with the necessary information for the correct use of the instrument, as well as a
precise idea of its versatility .
These instruments are in compliance with directives EN 50081-1, EN 50082-1 and
EN 61010-1.
ISO 9000 Certified Company since 1992ISO 9000 Certified Company since 1992
ISO 9000 Certified Company since 1992
ISO 9000 Certified Company since 1992ISO 9000 Certified Company since 1992
2
TABLE OF CONTENTS
PRELIMINARY EXAMINATION . . . . . . . . . . . . . . 4
GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . 5
FUNCTIONAL DESCRIPTION . . . . . . . . . . . . . . 6
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . 9
METHOD OF ANALYSIS. . . . . . . . . . . . . . . . . 10
Forward titration . . . . . . . . . . . . . . . . . . . 10
Back titration . . . . . . . . . . . . . . . . . . . . . 11
End Point determination . . . . . . . . . . . . . . 11
HOW TO SELECT THE CORRECT
AMPEROMETRIC TITRATION PROCEDURE . . . 13
HOW TO COLLECT THE SAMPLE . . . . . . . . . . 14
OPERATIONAL GUIDE. . . . . . . . . . . . . . . . . . 15
Initial preparation . . . . . . . . . . . . . . . . . . 15
Method A: Free Chlorine forward titration. . 15
Method B: T otal Chlorine forward titration. . 1 6
Method C: T otal Chlorine back titration . . . 1 8
INTERFERENCES AND SOURCES OF ERROR. . 2 1
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . 23
Calibration requirements . . . . . . . . . . . . . 23
Probe conditioning . . . . . . . . . . . . . . . . . 23
Electrode cleaning procedure . . . . . . . . . . 23
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . 24
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . 25
OTHER PRODUCTS FROM HANNA . . . . . . . . 26
CE DECLARATION OF CONFORMITY. . . . . . . 27
3
PRELIMINARY EXAMINATION
Remove the instrument 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 immediately .
Each titrator is supplied complete with HI 710005 or HI
710006 12VDC power adapter .
PL 100C and PL 101C are also supplied with:
• HI 3500A-1 10mL burette
• HI 3500B reagent container
• HI 3500C rubber bulb
• 50mm (2”) long (dia. 7 mm/0.3”) magnetic stir bar
• HI 3132B glass-body platinum-platinum electrode with
1 m (3.3”) cable and BNC connector
• HI 76405 electrode holder
• small spoon
• graph paper
• recorder plug
Note Save all packing materials until you are sure that the instru-
ment functions correctly . Any damaged or defective items must
be returned in their original packing materials together with
the supplied accessories.
Safety Precautions Please take the time to read the safety precautions carefully
wherever they appear in this manual. They are provided to
prevent personal injury and damage to the instrument. This
safety information applies to the operators and service personnel and the following two captions are used:
CAUTION: identifies conditions or practices that could result in damage to the instrument or persons;
WARNING: identifies conditions or practices that could result in personal injury or loss of life.
Note Because of the inherent dangers in handling chemical
samples, standards and reagents, HANNA Instruments
strongly recommends the user of this product to review the
Material Safety Data Sheets and become familiar with safe
handling procedures and proper usage prior to handling
any chemicals.
4
GENERAL DESCRIPTION
The Hanna PL 100 and PL 101 Chlorine Analyzers are
amperometric titrators which allow the determination of the
chlorine content in a known quantity of sample . The PL 100
measures Free Chlorine and the PL 101 T otal Chlorine.
The Hanna PL 100 and PL 101 Amperometric Titrators are
laboratory instruments containing a precision adjustable voltage source, a microammeter with LCD display , and a speed
regulated magnetic stirrer .
They operate providing a constant voltage to a dual electrode platinum probe and indicating the resulting probe
current. As titration proceeds, the change of the electrode
current is noted. At the point known as the End P oint, abrupt
change in the slope of the current curve occurs and the titration is complete. Sample concentration may be derived from
the End Point value.
The magnetic stirrer rotates at 300 RPM during the titration to
ensure proper mixing of the sample and titrant, yet slowly
enough to avoid volatilization of the measured species. The
stirrer motor is turned on and off with a rocker switch on the
front panel.
The instrument case features a stainless steel top and easy
visible LCD display for viewing the measured probe current.
Adjustment of applied probe voltage is provided by a digital
potentiometer . The potentiometer setting is controlled by two
keys in the front panel: ” ” and “ ”. A static digital memory
retains the last value set when the instrument power is re-
moved.
The PL 100 and PL 101 also feature a recorder output which
provides a low impedance output voltage from 0.00 to 2.00V :
This voltage corresponds to the probe current displayed on
the front panel LCD display . P robe current range is 0.00 to
2.00 µA.
A 10 mL glass automatic burette system is available together
with standard titration solutions 0.00564N Phenylarsine Oxide (P AO) and 0.000564N PA O, to cover the 0-1.5 ppm of
Cl2 or 1-15ppm of Cl2.
In addition to these a 0.00188N Iodine standard titration
solution is available in the range 0-4ppm of T otal Chlorine.
5
FUNCTIONAL DESCRIPTION
FRONT PANEL
1. UP key
2. DOWN key
3. Power LED
4. Stirrer ON/OFF switch
5. LCD Display
REAR PANEL
6. ON/OFF switch
7. Fuse holder
8. 12 VDC socket (for HI710005 or HI 710006)
9. BNC Electrode socket
10. Recorder output
6
FRONT PANEL
Display
The digital redout indicates the probe current in microamps.
An overcurrent situation (greater than 1.99 µA) results in a
“1.” display (no tenths or hundredths digit). T o reduce probe
current, merely reduce probe voltage by pressing the front
panel “ ” key .
Power on indicator
During normal operation the red front panel indicator LED
should be on continuously , indicating that the instrument is
turned on.
Stirrer motor switch
This switch, located on the right hand side of the front panel,
operates the stirrer . Instrument power must be on (LED indicator on) for the stirrer to operate.
“ ” and “ ” bias control keys
Bias voltage applied to the probe is controlled by a digital
potentiometer . The potentiometer has sixty-four steps which
are selected with the front panel “ ” and “ ” keys. A single
depression causes the potentiometer setting to increase or
decrease by one step. Pressing and holding one of the keys
for one second causes the potentiometer to increment or decrement at ten steps per second until the key is released or
until the end of the taper is reached.
A static digital memory retains the last setting when the power
is turned off or removed from the system.
REAR PANEL
Power on switch
T o power on and off the instrument.
Probe input connector
The probe is connected to the rear of the instrument with a
BNC connector .
Recorder output connector
The recorder output female connector is located on the rear
panel of the instrument. The recorder connecting cable is
terminated with a male banana type plug provided with the
instrument.
7
Recorder output
Power
Fuse
The recommended recorder hookup uses a shielded, twistedpair cable. The shield should be connected to (earth) ground
at the recorder end and left open at the instrument end.
The output is 0.00 to 2.00 V corresponding to 0.00 to 2.00
µA probe current as indicated on the front panel display .
Power is provided from the mains through a HI 710005 or HI
710006 power adapter . Be sure the mains voltage matches
the input voltage specified on the power adapter . The power
adapter output connector plugs into a socket on the back
panel of the instrument.
Caution: The power adapter may be damaged if not operated at the
correct voltage.
The instrument power conditioning circuitry is protected with
a 200 mA, 5 x 20mm tubular fuse located on the rear panel.
To replace the fuse simply twist off the fuse holder cap and
replace the fuse.
Unplug the meter before replacing the fuse.
8
SPECIFICATIONS
Range 0 - 750mVDC probe voltage
Resolution 0.01 µA
Accuracy ±0.01 µA
Probe HI 3132B glass-body platinum
Recorder output 0.00 to 2.00V
T ypical EMC ±1% f.s.
Deviation
Stirrer Motor Speed 300 ±10 RPM (constant)
Power Source 12VDC through HI 710005 or HI 710006
Environment 0 to 50°C (32 to 122°F);
Dimensions 180x180x70mm (7.1x7.1x2.8")
PL 100 PL 101
0.00 - 2.00µA probe current
electrode with 1 m (3.3”) cable
corresponding to 0.00 to 2.00 µA
(included)
0 to 95%RH (non condensing)
Weight 1.6 Kg (3.6 lb.)
9
Loading...