Hanna Instruments HI 93735 User manual

Instruction Manual
HI 93735
Hardness
ISM
http://www.hannainst.com ThisInstrumentisin
Compliancewith the CE Directives
HannaInstrumentsreservestherighttomodifythedesign,construction
andappearanceofitsproductswithoutadvancenotice.
WARRANTYWARRANTY
WARRANTYWARRANTY
WARRANTY
HI93735iswarrantedfor two years against defects in workman-
shipand materialswhenusedforits intendedpurposeandmaintained
accordingtoinstructions.
Thiswarranty islimitedto repairorreplacement freeofcharge.
Damages due to accident, misuse, tampering or lack of prescribed
maintenanceare not covered.
Ifserviceis required,contactthedealerfromwhom youpurchasedthe
instrument.Ifunderwarranty, report the model number, dateofpur-
chase,serialnumberandthe nature of the failure. Iftherepairisnot
coveredby the warranty,youwillbe notified ofthechargesincurred. If
theinstrumentistobereturnedtoHannaInstruments,firstobtaina
ReturnedGoodsAuthorizationNumber from the Customer Service de-
partmentand thensenditwith shipmentcostsprepaid.Whenshipping
anyinstrument, makesureitisproperly packagedforcompleteprotec-
tion.
Tovalidate yourwarranty,filloutandreturntheenclosedwarrantycard
within14 daysfromthedateofpurchase.
Allrightsare reserved. Reproduction inwholeor in part isprohibited
without the written consent of the copyright owner, Hanna Instru-
mentsInc.,Woonsocket, Rhode Island, 02895,USA.
DearCustomer,
Thank you for choosing a Hanna product. This manual will
provide you with the necessary information for the correct
operation of the meter. Please read it carefully before using
the meter. If you need additional technical information, do
not hesitate to e-mail us at [email protected].
This instrument is in compliance with directives
EN 50081-1 and EN 50082-1.
Remove the instrument from the packing material and
examine it carefully to make sure that no damage has
occurred during shipment. If there is any damage, notify
your Dealer.
Each Ion Specific Meter is supplied complete with
• 9V Battery
• Two Sample Cuvets and Caps
• One Transport Cap
• Instruction Manual
Note: Conserve all packing material until the instrument
has been observed to function correctly. Any defective
item must be returned in its original packing.
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION
The HI 93735 meter measures the total hardness in drink-
ing, surface and wastewater.
Themeter usesan exclusivepositive-locking systemto ensure
that the cuvet is in the same place every time it is placed
into the measurement cell.
The reagents are in liquid and powder form and are
supplied in bottles and in packets. The amount of reagent
is precisely dosed to ensure maximum repeatability.
Display codes aid the user in routine operations.
The meters have an auto-shut off feature that will turn the
instrument off after 10 minutes of non-use.
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
SPECIFICATIONS
Range LR 0 to 250 ppm
MR 200 to 500 ppm
HR 400 to 750 ppm
Resolution 1 ppm from 0 to 100 ppm
5 ppm from 100 to 750 ppm
Accuracy LR ±5 ppm or ±4% of reading,
whichever is greater
MR ±7 ppm or ±3% of reading,
whichever is greater
HR ±10 ppm or ±2% of reading,
whichever is greater
Typical EMC Deviation ±5 ppm
Light Source Light Emitting Diode @ 470 nm
Method Adaptation of the EPA recommended
method 130.1. The reaction between cal-
cium, magnesium and the reagents causes
a red-violet tint in the sample
Light Detector SiliconPhotocell
Environment 0 to 50°C (32 to 122°F);
max 95% RH non-condensing
Battery Type/Life1 x 9 volt/40 hours
Auto-Shut off After 10' of non-use
Dimensions 180 x 83 x 46 mm (7.1 x 3.3 x 1.8")
Weight 290 g (10 oz.).
REQUIRED REAGENTS:
Code Description Quantity
HI93735A-LR Hardness Indicator reagent LR 9.5mL/test
HI93735A-MR Hardness Indicator reagent MR 9.5mL/test
HI93735A-HR Hardness Indicator reagent HR 9.5mL/test
HI93735B Hardness Buffer reagent 2 drops
HI93735C Fixing Reagent 1 packet
This indicates that the meter is in a
ready state and zeroing can be per-
formed.
Sampling in Progress. This prompt ap-
pears each time the meter is performing
a measurement.
This indicates that the meter is in a
zeroed state and measurement can be
performed.
Under range. A flashing value lower
than the minimum concentration read-
able(see specifications)indicates thatthe
sample absorbs less light than the zero
reference. Check the procedure and make
sure you use the same cuvet for reference
(zero) and measurement.
Over range. A flashing value higher than
themaximumconcentrationreadable(see
specifications) indicates that the sample
absorbs too much light, meaning that
the concentration is too high. Dilute the
sample.
Light over range. The cuvet is not in-
serted correctly and an excess ambient
light is reaching the detector. If the cover
is properly installed, then contact your
dealer or the nearest Hanna Customer
Service Center.
Light under range. The zero sample is
too dark for proper zeroing. If this is not
the case, contact your dealer or the
nearest Hanna Customer Service Center.
The "LOW BATTERY" indicates that the
battery voltage is getting low and the
battery needs to be replaced.
DISPLAY CODE GUIDEDISPLAY CODE GUIDE
DISPLAY CODE GUIDEDISPLAY CODE GUIDE
DISPLAY CODE GUIDE
REAGENT SETS
HI93735LR Reagents for 100 tests LR (0 to 250 ppm)
HI93735MR Reagents for100 tests MR(200 to 500ppm)
HI93735HR Reagents for 100 tests HR (400 to 750 ppm)
HI93735-0 Reagents for 100 tests (0 to 750 ppm)

OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDE
MEASUREMENT PROCEDURE
• Turn the meter on by pressing ON/OFF.
• When the LCD displays "SCL",
it is ready.
• Themeter automatically defaultsto Hardness LowRange
(LR) measurement mode, with the “HARDNESS” and
“LR”indicationsappearingontheLCD.Press the“RANGE”
key to select the Medium Range (MR) or the High
Range (HR) if needed. If the “RANGE” key is pressed
while in HR mode, the meter returns to LR range.
• Using the syringe, add exactly 0.5mL of
unreacted sample to the cuvet.
Note: foraccurate results, fill the syringe with
the sample up to the 1.0mL mark,
then transfer 0.5mL to the cuvet.
• With the plastic dropper fill the cuvet up
to the 10 mL mark adding the HI93735A
indicator reagent appropriate to the se-
lected range (e.g. HI93735A-LR if the
range selected is LR).
Note: the liquid in the cuvet forms a convexity
on the top; the bottom of this convexity
must be at the same level of the 10mL mark.
• Add 2 drops of HI93735B buffer re-
agent.
• Replace the cap and shake gently to
mix.
• Place the cuvet into the holder and
ensure that the notch on the cap is
positioned securely into the groove.
ON
OFF
• Press“ZERO/READ”. The display will show a countdown
prior to measurement. During measurement the “bLn”
indication will be shown, then “-0-” will appear.
• Remove the cuvet and add the content of 1
packet of HI93735C fixing reagent.
• Replace the cap and shake gently to
mix.
• Reinsert the cuvet into the holder
and ensure that the notch on the
cap is positioned securely into the
groove.
• Press“ZERO/READ”. The display will show a countdown
prior to measurement. During measurement the “SIP”
indication will be displayed.
• The instrument directly displays the hardness in ppm of
CaCO3on the Liquid Crystal Display.
• Press the “UNIT” key repeatedly to have
the reading converted in °f, °D and °E
respectively.
The conversion factors are as follows:
1 ppm = 0.1 °f = 0.05556 °D = 0.07 °E
• Press the “RANGE” key to have the meter ready for the
next measurement.
INTERFERENCES
Interference may be caused by:
Excessive amounts of heavy metals
Note: if the sample is very acidic, some extra drops of
HI93735B buffer reagent may be added.
The instruction listed below should be carefully followed
during testing to ensure best accuracy.
• Do not touch the cuvet walls with hands.
• In order to maintain the same conditions during the
zeroing and the measuring phases, it is necessary to
close the cuvet to prevent any contamination.
• Do not let the test sample stand too long after reagent
is added or accuracy will be lost.
• Whenever the cuvet is placed into the measurement cell,
it must be completely free of fingerprints, oil or dirt.
Wipe it thoroughly with HI 731318 or a lint-free cloth
prior to insertion.
• It is important that the sample does not contain any
debris. This would corrupt the readings.
• It is possible to take multiple readings in a row, but a
zero reading must be taken for each sample and it is
recommended that the same cuvet is used for zeroing
and measurement.
• It is important to discard the sample immediately after
the reading is taken because the glass might become
permanently stained.
• Shaking the cuvet can generate bubbles in the sample,
causing higher readings. To obtain accurate measure-
ments, remove such bubbles by swirling or by gently
tapping the vial.
TIPS FOR AN ACCURATETIPS FOR AN ACCURATE
TIPS FOR AN ACCURATETIPS FOR AN ACCURATE
TIPS FOR AN ACCURATE
MEASUREMENTMEASUREMENT
MEASUREMENTMEASUREMENT
MEASUREMENT
BATTERY REPLACEMENTBATTERY REPLACEMENT
BATTERY REPLACEMENTBATTERY REPLACEMENT
BATTERY REPLACEMENT
Battery replacement must only take place in a non-hazard-
ous area using a 9V alkaline battery.
Simply slide off the battery cover on
the back of the meter. Detach the
battery from the terminals and at-
tach a fresh 9V battery while paying
attention to the correct polarity. Re-
place the battery and the cover.
9V
SLID
E
OFF
ACCESSORIESACCESSORIES
ACCESSORIESACCESSORIES
ACCESSORIES
REAGENT SETS
HI93735LR Reagents for 100 tests LR (0 to 250 ppm)
HI93735MR Reagents for100 tests MR(200 to 500ppm)
HI93735HR Reagents for 100 tests HR (400 to 750 ppm)
HI93735-0 Reagents for 100 tests (0 to 750 ppm)
OTHER ACCESSORIES
HI710009 Blue rubber boot
HI710010 Orange rubber boot
HI721310 9V battery (10 pcs)
HI731318 Tissue for wiping cuvets (4 pcs)
HI731321 Glass cuvets (4 pcs)
HI731325 Caps for cuvets (4 pcs)
HI93703-50 Cuvets cleaning solution (230 mL).
CE DECLARATIONCE DECLARATION
CE DECLARATIONCE DECLARATION
CE DECLARATION
OF CONFORMITYOF CONFORMITY
OF CONFORMITYOF CONFORMITY
OF CONFORMITY
IST93735R1 03/99PRINTED IN PORTUGAL
RecommendationsforUsers
Before using these products, make sure that they are entirely suitable for the environ-
ment in which they are used. Operation of these instruments in residential area could
causeunacceptable interferences to radio and TV equipments, requiringthe operator to
take all necessary steps to correct interferences. Any variation introduced by the user to
thesuppliedequipmentmaydegradetheinstruments'EMCperformance.
Toavoiddamagesorburns,donotperformanymeasurementinmicrowaveovens.