Loviband SensoDirect 150 User manual

SensoDirect 150
MultiMeter Instrument - Instruction Manual
GB
pH/ORP DO
CD/TDS

22
Table of Contents
1. Specifications .................................................................................. 1
1.1 General Specifications .................................................................... 1
1.2 Electrical Specifications .................................................................. 2
2. Front Panel Description.................................................................. 5
3. pH/mV Measuring and Calibration
Procedure ........................................................................................ 7
4. Conductivity/TDS Measuring and
Calibration Procedure .................................................................. 13
5. DO (Dissolved Oxygen) Measuring
and Calibration Procedure ........................................................... 18
6. Data Load, Data Record, Data Logger ........................................ 24
7. Advanced Adjustment Procedure................................................ 26
7.1 Check Memory Space ................................................................... 27
7.2 Clear Memory ............................................................................... 27
7.3 Date/Time Setting......................................................................... 27
7.4 Sample Time Setting..................................................................... 27
7.5 Auto Power Off Default Setting.................................................. 28
7.6 Temp. Unit Default Setting .......................................................... 28
7.7 pH Manual Temp. Value Setting.................................................. 28
7.8 CD Temp. Compensation Factor Setting...................................... 28
7.9 CD ( µS, mS ), TDS ( ppm ) Setting ............................................... 29
7.10 DO % Salt Compensation Value Setting ..................................... 29
7.11 DO Height (Altitude) Compensation Value Setting ................... 30
7.12 Escape from the Setting function................................................ 30
8. Data Output.................................................................................. 31
9. RS232 PC Serial Interface.............................................................. 33
10. Battery Replacement .................................................................... 35
11. System Reset ................................................................................. 35
12. Accessories .................................................................................... 36

1
1. Specifications
1.1 General Specifications
Circuit Custom microprocessor LSI
Display LCD size : 58 mm x 34 mm.
Measurement pH / Oxidation Reduction Potential (ORP)
Conductivity/Total Dissolved Solids (TDS)
Dissolved Oxygen (DO)
Temperature
Sampling Time of Data Log-
ger
1 second to 8 hours 59 minutes and
59 seconds
Data Hold Freeze the display reading.
Memory Recall Maximum and Minimum value
Power off •Auto shut off saves battery life; manual
shutoffpossiblebypressing“Power”button
for 2 seconds
•Default changeable: auto power off/
manual power off
•Withdefaultsetatautopoweroff,power
will off automatically after 10 minutes if no
buttonispressed.
Display lapse time Approx.1second.
Data Output RS 232 PC serial interface
Operating Temperature 0 to 50 °C (32 to 122°F) for the instrument
(notincludingprobes)
Operating Humidity Less than 80% rel. humidity
Power Supply •DC1.5Vwith4batteries(mignonsize;
TypeAA)
•DC9Vbyadapterinput
Power Current •Operation:approx.DC28mA
•Clock(poweroff):approx.DC1µA

2
Weight •instrument390g(batteriesincluded)
•withprotectivecovering620g
Dimension • instrument:203x76x38mm
• with protective covering: approx.
220 x 125 x 45 mm
1.2 Electrical Specifications (23± 5°C)
A. pH/mV
Measurement pH 0 to 14 pH
mV -1999mVto1999mV
Input Impedance 1012 ohm
Temperature Compensation
for pH measurement
Manual 0 to 100°C
(32 to 212°F)
Automatic(ATC) 0to65°C
(32 to 149 °F) with tem-
peratureprobe
pHCalibration 1to3pointcalibrationusing
pH7/pH4/pH10buffersolutions
Threepointcalibrationensuresbestlinearity
and accuracy
Measurement Range Resolution Accuracy
pH 0 to 14 pH 0.01 pH ± (0.02 pH + 2 digits)
mV -1999to1999mV 1mV ± (0.5 % pH + 2 digits)
*pHaccuracyisbasedoncalibratedmeteronly.

3
B. Conductivity
Conductivityprobe Carbon rod electrode for long
life
Function •Conduction(µS,mS)
•TotalDissolvedSolids(ppm)
•Temperature(°C,°F)
Temperature Compensation Automatic from 0 to 60°C
(32–140°F),
with temperature compensa-
tion factor variable between
0 to 5 % per °C
ProbeOperatingTemperature 0to60°C(32to140°F)
ProbeDimension R o u n d ,  2 2  m m  d i a m e t e r  x 
120 mm length
ProbeWeight approx.65g
Range Measurement Resolution Accuracy
200µS 0to200.0µS/cm 0.1µS/cm ± (2 % F.S.
+ 1 digit)
2 mS 0.2 to 2.000 mS / cm 0.001 mS / cm
20 mS 2 to 20.00 mS / cm 0.01 mS / cm
200 mS 20 to 200.0 mS / cm 0.1 mS / cm
F.S. = Full Scale

4
C. TDS (Total Dissolved Solids)
Range Measurement Resolution Accuracy
200 ppm 0 to 132 ppm 0.1 ppm ± (2 % F.S. +
1 digit)
2,000ppm 132to1,320ppm 1 ppm
20,000ppm 1,320to13,200ppm 10 ppm
200,000ppm 13,200to132,000ppm 100 ppm
F.S. = Full Scale
D. Temperature
Function Measurement Resolution Accuracy
°C 0°Cto60°C 0.1°C ± 0.8°C
°F 32°F to 140°F 0.1°F ± 1.5°F
E. Dissolved oxygen
OxygenProbe Polarographictypeoxygenprobe
ProbeCompensation
andAdjustment
Temperature 0to50°C,automatic,
(3 to 122 °F)
Salt 0 to 39 % Salt
Height 0 to 8900 meter
ProbeWeight approx. 195 g
ProbeSize Round,190mmlengthx28mmdiameter
Measurement Range Resolution Accuracy(23±5°C)
Dissolved Oxygen 0 to 20.0 mg/L 0.1 mg/L O2± 0.4 mg/L O2
OxygeninAir 0 to 100 % 0.1 % O2± 0.7 % O2

5
2. Front Panel Description (Fig. A)
A-1 Display
A-2 Power Button
A-3 REC Button (Enter Button)
A-4 HOLD Button (ESC Button)
A-5 Mode Button ( Up Button, Zero Button)
A-6 Function Button (Range Button, Down Button)
A-7 Send Button (Clock Button)
A-8 SET Button (Logger Button)
A-9 Stand
A-10 Battery Compartment Cover
A-11 Battery Cover Screw
A-12 Tripod Fix Nut
A-13 Temp. Socket (pH ATC Socket)
A-14 CD Socket
A-15 DO Socket
A-16 pH Socket (BNC Socket)
A-2
A-3
A-4
A-5
A-6
A-7
A-8
A-1
A-15
A-14
A-13
A-16
A-12
A-9
A-11
A-10

6
A-17 DC 9V Power Adapter Input Socket
A-18 RS-232 Output Terminal
A-19 System Reset Button
A-20 LCD Brightness Adjust
Attention:
Please do not put more than one electrode only into the wa-
ter sample when using an instrument that works with various
electrodes.
Only start the measurement for which the according electrode
is immersed in the sample.
A-17 A-18 A-19 A-20
DC IN
RS232
RESET

7
3. pH/mV Measuring and Calibration Procedure
Display layout
MeasurementValue
PH
Manual Temp.
25.0 °C
Temp. value Temp unit
pH
or
mV
Manual Temp. or
AutoTemp.
10.00
The meter default settings are as follows:
•The display unit is set to pH.
• The temperature unit is set to °C.
• Manual temperature setting (without ATC probe
connection)
• Auto power off.
• Data logger function sampling time: 2 seconds.

8
3.1 pH measurement (with manual temperature setting)
1)AttachthepHElectrodebyinstallingthe“ProbePlug“
 (Fig.B-1)intothe“pHSocket/BNCSocket“(Page5,Fig.A-16).
2)Poweronthemeterbypressingthe“Power”buttononce.
3)Keeppressingthe“Mode”buttonuntilthedisplayofbottom
 rightshows“pH“and“ManualTemp.“indicator.
4) Adjust the Manual Temp. value exactly to the same
temperature
as the solution. For procedure refer to chapter
7.7, page 28.
5)RemovecapandholdthepHElectrodebody(Fig.B-2)andcom-
 pletelyimmersethe“SensingHead“(Fig.B-3)inthesolutionto
 bemeasuredandgentlyswirltheprobe.
6)TheupperdisplaywillshowthepHvalue,thebottomleftdisplay
will show the Manual Temp. setting.
Fig. B
B-1
B-2
B-3
B-4

9
3.2 pH measurement (with ATC , automatic Temperature
Compensation)
1)Alltheproceduresarethesameasfor3.1“pHmeasurement
 (manualtemperaturesetting)“,exceptforattachmentofa
 temperatureprobebyinsertingtheplugofthetemperature 
 probeintothe“Temp.Socket“(Page5,Fig.A-13),andimmers-
 ingthesensingheadofthetemperatureprobeintothemeasure-
ment solution.
2)TheupperdisplaywillshowthepHvalue,thebottomleft
 displaywillshowtheTemp.valueofthemeasuredsolution,and
thebottomrightdisplaywillshow“AutoTemp.“asexamplebelow:
When not in use the “Electrode Sensing Head“ (Page 8, Fig.
B-3) should always be immersed in water by part-filling
the probe cap, (Page 8, Fig. B-4) and ensuring that the cap
is firmly lifted onto the probe. Failure to do so will reduce
probe life.
3.3 mV Measurement
TheinstrumenthasabuiltinmV(millivolt)measurementfunction,
whichenablesyoutomakeion-selective,ORP(oxidationreduction
potential),andotherprecisemVmeasurements.
1)AttachtheORPElectrodebyinstallingthe“ProbePlug“ofthe
ORPelectrodeintothe“pHSocket/BNCSocket“(Page5,Fig.A-16).
2)Poweronthemeterbypressingthe“Power”buttononce.
3)Keeppressingthe“Mode”buttonuntilthedisplayatbottom
 rightshows“PH“and“ManualTemp.“indicator.
PH
Auto Temp.
25.0 °C
7.01

10
Press the “Function” button once so that the bottom right
display shows “mV“ .
4)TheupperdisplaywillshowthemVvalue.
3.4 pH calibration
Calibration - Introduction
An“ideal”pHElectrodegenerates0mVatpH7.00(177.4mVat
pH4).Themeterhasbeencalibratedwithsignalswhichsimulate
the“ideal”pHElectrode(basedon25°Cambientenvironment).
HowevernoteverypHElectrodeisasaccurateasthe“ideal”one,
socalibrationproceduresarenecessarybeforersttimemeasure-
ment.Inadditiontocalibrationbeforersttimemeasurement,us-
ersarealsorecommendedtocarryoutregularcalibrationtoensure
high accuracy measurements.
Required Equipment for Calibration
1)pHElectrode.
2)pHbuffersolutions.
Calibration Procedure
1)AttachthepHElectrodebyinstallingthe“ProbePlug“(Page8,
 Fig.B-1)intothe“pHSocket/BNCSocket“(Page5,Fig.A-16).
2)Poweronthemeter,setthemodetopHmeasurement,andthe
 bottomrightdisplaywillshow“PH“.
3)Adjustthe“TemperatureCompensationValue“tomakeitthe 
 sametemperatureasthepHbuffersolution.
• Manual temperature compensation value adjustment
procedure, refer to 7-7, page 28.
• Automatic temperature compensation, refer to 3.2,
Page 9.
4)Holdthe“pHElectrodebody“(Page8,Fig.B-2)andcompletely
 immersethe“SensingHead“(Page8,Fig.B-3)inthebuffersolu-
tionandgentlyswirltheprobe.ThedisplaywillshowthepHvalue.

11
5)Pressthe“REC”buttonand“HOLD”buttonatthesametime.
 Thedisplaywillshowthefollowingscreenasanexample.Now
release.
6)• IfthebuffersolutionispH7.0(±1pH),theupperdisplaywill
show 7.00 automatically.
 • IfthebuffersolutionispH4.0(±1pH),theupperdisplaywill
show 4.00 automatically.
 • IfthebuffersolutionispH10.0(±1pH),theupperdisplay
will show 10.00 automatically.
 • IfthebuffersolutionvalueisbeyondpH7.00,pH4.00,
  pH10.00(forexample7.01,4.02,10.03)thenuse
 “
”button,“ ”buttontoadjustthedisplayvaluetoexactly
  matchthepHbuffersolutionvalue.
7)Pressthe“Enter”buttontwicetosavethecalibrationdataand
 nishthecalibrationprocedure.
8)Thedescribedprocedurecanbeperformedforthefollowing 
 calibrationpoints:
pH7 calibration
pH4 calibration
pH10 calibration
•CalibrationshouldalwaysstartwithpH7,followedbypH4and/
 orpH10calibration.
•Rinsetheelectrodewithdistilledwaterbeforeeachcalibration
point.
PH CAL.
^, v Enter : Y
23.5 °C
7.00

12
•Repeattheabovecalibrationproceduresatleasttwicetoensure
accuracy.
3.5 ORP calibration
1)AttachtheORPelectrode(optional,ORP-14)byconnectingthe
ORP electrode to the meter.
2)Poweronthemeter,andsetthemodeandfunctionto“mV“ 
 (refertochapter3.3,Page9).
3) Immerse the sensing head of the ORP electrode in the ORP
 standardbuffersolution.TheupperdisplaywillshowtheORP
 valueinmV.
4)Pressthe“REC”buttonand“HOLD”buttonatthesametime.
 Thedisplaywillshowthefollowingscreenasanexample.Now
release.
5)Use“ ”button,“ ”buttontoadjusttheupperdisplayvalueto
 exactlymatchtheORPbuffersolutionvalue.Pressthe“Enter”
 buttontwicetosavethecalibrationdataandnishthecalibra-
tion procedure.
• ORP calibration is only possible if the ORP buffer solution
value is > 100 mV.
• ORP calibration at less than 100 mV is not permitted.
mV
Adjust
201
235
Aiv

13
4. Conductivity/TDS Measuring and Calibration Procedure
Display layout MeasurementValue
200.0 µS
Auto Range
24.2 °C
Temp. value Temp unit AutoorManual
range
19.00
The meter default settings are as follows:
•Thedisplayunitissettoconductivity(µS,mS).
•Thetemperatureunitissetto°C.
•Temp.compensationfactorissetto2.0%per°C.
•Autorange.
•Autopoweroff.
•Dataloggerfunctionsamplingtime:
2 seconds.
Range
scale

14
4.1 µS, mS measurement
1)AttachtheConductivityProbebyinstallingthe“ProbePlug“
 (Fig.C-1)intothe“CDSocket“(Page5,Fig.A-14).
2)Poweronthemeterbypressing“Power”buttononce.
3)Keeppressingthe“Mode”buttonuntilthebottomrightdisplay
 showsavalue(e.g.“200mS“)and“AutoRange“.
4)Removeprobecapandholdtheprobebody(Fig.C-2)andcom-
 pletelyimmersethe“SensingHead“(Fig.C-3)inthesolutionto
 bemeasured.Swirltheprobetoletanyairbubbleescapefrom
the sensing head.
5)Thedisplaywillshowtheconductivityvaluesineither“mS/cm”
 or“µS/cm”.Atthesametimethebottomleftdisplaywillshow
the Temp. value of the measured solution.
Fig. C
C-1
C-2
C-3

15
Manual range operation
The meter default is set to auto range mode. Under auto range
measurement,thebottomrightdisplaywillshowthe“Auto
Range“indicator.Ifmanualrangemodeisrequired,theprocedures
are as follows:
1)Pressthe“Range”buttoncontinuouslyforatleasttwoseconds
 untilthebottomrightdisplayshowsthe“ManualRange“indica-
 tor.Releasethe“Range”button.Nowthemeterissetformanual
range operation.
2)Pressthe“Range”buttononcetochangetherange.Therange
 (200µS,2mS,20mS,200mS)willshowunderthemeasure- 
ment value.
3)• Ifthedisplayshows“ ---- “,itindicatesanoverrange.
  Selectthenext,higherrange.
 • Ifthedisplayshows“ ----“,itindicatesanunderrange. 
  Selectthenext,lowerrange.
4)TochangeManualRangebacktoAutoRange,pressthe 
 “Range”buttoncontinuouslyforatleasttwosecondsuntilthe
 bottomrightdisplayshowsthe“AutoRange“Indicator.Release
 the“Range”button.NowthemeterissetforAutorangemode
again.
Change the Temp. unit to °F
TochangetheTemp.unitfrom°Cto°F,pleaserefertopage28,
chapter7.6(Temp.UnitDefaultSetting)
Change the Temp. Coefficient Factor
The default Temp. compensation factor value of the measurement
solutionissetto2.0%per°C.Tochangeit,pleaserefertopage
28,chapter7.8(Temp.CompensationFactorSetting).

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4.2 TDS (ppm) measurement
Measuringproceduresarethesameasabove4.1 Conductivity (µS,
mS) measurement,exceptforchangingthedisplayunitfromµS,
mStoppm.Fordetailedprocedurespleaserefertopage29,chap-
ter7.9CD(µS,mS),TDS(ppm)Setting.
4.3 Calibration
1)Obtainathestandardconductivitysolution:
For example :
 • 2mSrangecalibrationsolution:
1.413 mS Conductivity Standard Solution
 • 200µSrangecalibrationsolution:
80 µS Conductivity Standard Solution
 • 20mSrangecalibrationsolution:
12.88 mS Conductivity Standard Solution
or other Conductivity Standard Solution
2)Installthe“ProbePlug“(Page14Fig.C-1)intothe“CDSocket“
 (Page5,Fig.A-14).
3)Poweronthemeter,andsetthemodetoconductivity
 measurement(µS,mS).
4)Holdtheprobebody(Page14,Fig.C-2)andcompletelyimmerse
 “SensingHead“(Page14,Fig.C-3)inthestandardsolution.
 Swirltheprobetoletanyairbubbleescapefromthesensing 
head. The display will show the conductivity mS ( mS ) values.
5)Pressthe“REC”buttonand“HOLD”buttonatthesametime.
 Thedisplaywillshowthefollowingscreen,asanexample.Now
release.

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6)Use“ ”button(Page5,Fig.A-5),“ ”buttontoadjustthe
upper display value to match the standard conductivity value.
7)Pressthe“Enter”buttontwicetosavethecalibration 
 data,andnishthecalibrationprocedure.
• If only one calibration point is needed, just set the 2 mS
range (1.413 mS Cal.).
• A multi-point calibration procedure should always start
with 2 mS range (1.413 mS Cal.), then proceed to other
ranges (20 µS range, 20 mS range or 200 mS range) if
necessary.
CD CAL.
^, v ENTER: Y
23.5 °C
1.413

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Display layout MeasurementValue
% O2
24.2 °C
Temp. value Temp unit Temp. unit
% O2or mg/L
20.9
5. DO (Dissolved Oxygen) Measuring and Calibration
Procedure
ATTENTION: Make sure the Oxygen probe is filled with Elec-
trolyte!
To fill the Probe‘s Electrolyte, refer to chapter 5.3 “Probe
maintenance“, page 22.
The meter default settings are as follows:
 •Thedisplayunitissetto%O2.
 •Thetemperatureunitissetto°C.
 •Autopoweroff.
 •Dataloggersamplingtime:2seconds.