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Ponpe 8351 Operation Manual Download Page 25

Type

Default

Parameters

Remark

Appe ndi x A: Met er Fa ct or y Def au lt Set ting

P1.1 Select C/ F

C

Temp unit

P1.2 Nor. Temp

25 C

Selectable: 25 or 20 C

P4.1
P4.2

Viewing 
previous 
calibration 
data

No calibration data for 1st range
No calibration data for 2nd range

P1.3 Temp. Coefficient

2.1%/ C

Adjustable from 0.4 to 10%

P2

.

1

 

TDS factor

Adjustable from 0.40 to 1.00
 (only for 8361)

0.50

P3

.

1

 

Factory default

Retain your current settings

NO

Appe ndi x B: Cond uc tivi ty to TDS  
                       Conv er si on Fa ct or s

Conductiv ity 
at 25 C

TDS KCl

ppm value

Factor

TDS NaCl

Factor

TDS 442

Factor

23

μ

S              11.6    0.5043  10.7      0.4652  14.74   0.6409

84

μ

S             40.38  0.4807   38.04   0.4529   50.5     0.6012

447

μ

S          225.6   0.5047   215.5   0.4822   300      0.6712

1413

μ

S        744.7   0.527     702.1   0.4969  1000     0.7078

1500

μ

S        757.1   0.5047   737.1   0.4914  1050     0.7

2070

μ

S        1045    0.5048   1041     0.5029 1500     0.7246

2764

μ

S        1382    0.5          1414.8 0.5119 2062.7  0.7463

8974

μ

S         5101   0.5685    4487    0.5        7608     0.8478

12,880

μ

S     7447    0.5782   7230    0.5613 11,367   0.8825

15,000

μ

S     8759    0.5839   8532    0.5688 13,455   0.897

80mS             

52,168

  0.6521   48,384 0.6048 79,688  0.9961

ppm value

ppm value

442: 40% sodium sulfate, 40% sodium 
bicarbonate and 20% sodium chloride.

Appendix C: Calculating TDS 
                       conversion factors

The meter can be calibrated by using TDS calibration 
standard solutions. The calibration standard requires 
the TDS value at a standard temperature such as 
25 C. To determine the Conductivity-to-TDS
conversion factor, please use the following formula:

o

Factor = Actual TDS :  Actual Conductivity @ 25 C

24

Summary of Contents for 8351

Page 1: ...OPERATION MANUAL PEN TYPE WATER QUALITY METER Model 8361 Cond TDS meter 8351 Cond meter 8371 Salinity meter ...

Page 2: ...ual display with ATC Data hold to freeze readings Pen size easy to fit in pocket Low battery indicator Auto power off C F unit switchable Power by 4pcs LR44 batteries Multi points calibration One touch only for calibration MATERIAL SUPPLIED This package contains The meter x 1 LR44 button battery x 4 Operation manual Color box or plain box POWER SUPPLY The meter is powered by 4 pcs LR44 batteries T...

Page 3: ...over in counter clockwise direction DON T discard the black washer 4 Make sure the batteries are in place and the polarity is correct 5 Put back the battery cover and turn it tightly in clockwise direction 1 Remove battery from instruments that you do not plan to use for a month or more Do not leave battery in instrument NOTE 2 ...

Page 4: ... the unit of Conductivity ppt or ppm is the unit of TDS and Salinity C or F is the unit of liquid temprature is the battery low icon 8351 8371 8361 KEYPAD OPERATION 1 Remove the probe cover from meter to expose the electrode out 3 2 Press to power on the meter LCD will display parameters ex tnr tCo tds rAn in turns and then enter normal display ...

Page 5: ...elect the ranges For example if you prefer the meter to display a reading as 0 50 mS instead of 500 µS you just need to press m select 19 99 mS range when you are in normal measurement mode ore than 2 seconds to NOTE Accuracy is a percent of full scale so using your meter in the lowest range will result in the greatest accuracy The LCD will display E02 E03 if the measured value is below or over th...

Page 6: ...ed for a long time please soak the probe more than 30 minutes to clear up the lazy effect of probe Dip the probe into the sample Make sure there are no air bubbles trapped in the slot of the probe To remove air bubbles give the probe a gentle stir Making sure the electrode tip is submerged when you stir it Stir the probe gently in the sample to create a homogenous sample Allow a few seconds to rea...

Page 7: ...re than 2 seconds to select manual ranging See details in page11 10 TDS Measurement Set the TDS conversion factor to right value The factory default is 0 50 To change the TDS factors refer Appendix B in page 24 11 Salinity Measurement 12 8371 is designed for salt measurement When in SALT mode Built in NaCL conductivity to TDS conversion factor Temp Coefficient and Normalization Temperature are all...

Page 8: ...u can disable the sleep mode To disable the auto power off NOTE The disable sleep mode will be invalid after every power off AUTO POWER OFF SLEEP FUNCTION Before power on pressing keys simultaneously until a n appeared on the screen and then release keys to return to normal mode SETUP The advanced setup mode lets you customized your meter s preferences and defaults 7 14 Accuracy Air bubbles The ai...

Page 9: ... After confirming the unit you can continuously set another temp related parameters except 8371 or press more than 2 seconds to return to P1 0 While in P1 0 press for more than 2 seconds to return to measure ment mode P1 0 then press or Short press Long press or Long press P1 0 temperature parameter setting t To change the parameters you can press more than 2 sec to enter setup mode when the meter...

Page 10: ...arily to confirm the value and meter will enter next step or press more than 2 sec to return to P1 0 without saving Temp Coefficient tCo press or or to change the temperature coefficient from 0 0 to 4 0 Press momentarily to confirm the value or press more than 2 sec to return to P1 0 without confirming the P1 3 value NOTE The text P1 1 P1 2 P1 3 P2 1 P3 1 will not display on LCD NOTE P1 2 1 3 are ...

Page 11: ...ut confirming the value P3 0 Reset meter rSt In P2 0 press or to enter P3 0 When you decide to reset the meter all parameters will be reset to factor default values include the calibration info NOTE Pay attention to the diffe rence between short or long press after setting the tds value 10 In P1 0 press to select P2 0 P3 1 Reset In P3 0 press momentarily to enter P3 1 Press or to select Y or N Pre...

Page 12: ... Range 2 calibration info In P4 1 press or to enter P4 2 and you can see the last cal concentration If range 2 is not yet calibrated will display on LCD In P4 1 or P4 2 press momen tarily to confirm the state and return to P4 0 Two measurement ranges are available for 8351 61 71 The default mode is automatically ranging Range 1 Range 2 0 1999uS 0 1999uS or 1999ppm 0 19 99mS 0 19 99mS or 19 99ppt 8...

Page 13: ...dard Second when should you calibrate Selecting a calibration standard For best results select a conductivity or TDS 8361 or NaCl 8371 standard near the sample value you are measuring Alternatively use a calibration solution value which is approximate 2 3 of the full scale of the measurement range you plan to use For example in the 0 to 1999 uS range use 1413 uS solution for calibration DO NOT reu...

Page 14: ...hen you re calibrate it at 1500 uS again also in the 0 to 1999uS range the previous 1413uS will be replaced in this range 0 1999uS However the meter will retain the calibration data for other ranges which are not yet re calibrated NOTE The temperature coefficient of the meter o is defaulted at 2 1 per C and provides good results for most applications Please see Program P1 3 on page 9 if you need t...

Page 15: ...or in below concentration calibrate the meter at least once a week to get specified accuracy Model Concentration 8351 8361 8371 100uS 100uS or 100 TDS factor ppm 0 10ppt 2mS 2mS or 2 TDS factor ppm 5 0ppt CONDUCTIVITY CALIBRATION 1 2 3 4 Insert the probe into demineralized water or distilled water for about 30 minutes to rinse the probe Select the conductivity standard for calibration See page 13 ...

Page 16: ...and to change the value in order to match the value to the standard which is o referred to normalization temp 25 C You can adjust the conductivity reading up to 30 from the detected value However if your detected value and standard value differs by more than 30 it means cleaning or replacing meter is needed For example Standard 10uS Detected value 19uS Adjustable range 5 7us 19 30 However under ab...

Page 17: ...6mS is already less than 10 range limit 1 99 So the max value could be input is 1 99mS only Repeat 1 9 for other ranges if needed NOTE When switch the meter from measure ment to calibration mode the meter will display the factory default value So if the meter was previously calibrated the display may seem to jump to the factory default value when entering calibration NOTE To exit conductivity cali...

Page 18: ...provided by standard solution manufacturer 3 4 Turn Pour 3 cm height of the solution into two separate clean containers on the meter Press the to select TDS mode 5 Rinse the probe into one of the containers Gently stir the probe 6 Dip the rinsed probe into the other container Tap the probe on the bottom of container to remove air bubbles Let the probe stabilize to the solution temperature 17 There...

Page 19: ... 1 Perform the conductivity calibration procedure on page 14 16 2 Select the correct Conductivity to TDS conversion factor You can refer to Appendix B or calculate the TDS conversion factor for other solutions using the formula show in Appendix C 3 Refer to P2 1 in page 10 to check the procedures of how to set the factor Option2 Using Conversion Factors SALT CALIBRATION MODEL 8371 Please follow up...

Page 20: ...ec to begin the calibration The SALT value will blink on the LCD 8 Pressing the or to adjust the value to match the value to the calibration standard You can adjust the SALT reading up to 30 from the detected value If the detected value and standard values differs by more than 30 it means clean electrode is needed 9 When the CAL stop blinks You can press to confirm the value The meter will switch ...

Page 21: ... but no display TROUBLESHOOTING 1 Make sure the time of pressing power key is more than 100 mS 2 Check the battery are in place and make good contact and correct polarity 3 Replace with new batteries and try again 4 Move away the batteries for one minute and then put back again Check whether the low battery icon is appeared before the display is off If yes replace with new batteries Display disapp...

Page 22: ...vertical angle is easy to create many air bubbles After soaking the electrode in solution for 15 30 minutes inspect the electrode carefully to make sure no bubbles adhere If air bubbles still exist tap the bottom of the container gently and stir the electrode to remove the air bubbles If above method are not working remove the electrode out of solution and blow at the electrode to remove the air b...

Page 23: ... than range limit If E03 still appear send back for repair E04 The original temp error results in this error Refer to below error code of temp After solving the error of temp E04 of conductivity will disappear Parameter TDS Please refer to above fig B Meter is in manual ranging 1 however the TDS measured value is higher than 1999 TDS factor ppm Press UP key more than 2 seconds to change the mode t...

Page 24: ... original temp or conductivity error results in this error Refer to error code of temp conductivity After solving the error of temp conductivity E04 of TDS will disappear Parameter Temperature Please refer to above fig D E01 Temperature circuit is damaged send back for repair E02 Temp value is lower than range limit 0 or temperature circuit is damaged Put the meter in room temp for 5 mins to make ...

Page 25: ...50 5 0 6012 447μS 225 6 0 5047 215 5 0 4822 300 0 6712 1413μS 744 7 0 527 702 1 0 4969 1000 0 7078 1500μS 757 1 0 5047 737 1 0 4914 1050 0 7 2070μS 1045 0 5048 1041 0 5029 1500 0 7246 2764μS 1382 0 5 1414 8 0 5119 2062 7 0 7463 8974μS 5101 0 5685 4487 0 5 7608 0 8478 12 880μS 7447 0 5782 7230 0 5613 11 367 0 8825 15 000μS 8759 0 5839 8532 0 5688 13 455 0 897 80mS 52 168 0 6521 48 384 0 6048 79 688...

Page 26: ... 25 C it is 1 409 mS cm The concept of reference temperature Normalization temperature was introduced to allow the comparison of conductivity results obtained at different temperature 0 0 The reference temperature is usually 20 C or 25 C The conductivity meter measures the actual COND and temperature and then converts it to the reference temperature using a temperature correction function and disp...

Page 27: ...e coefficient by using the following equation KT2 KT1 100 T2 T1 KT1 Average temperature coefficients of standard electrolyte solutions expressed as C of the conductivity value at 25 C Temp Range C 15 25 1 725 1 863 1 882 1 981 15 25 35 1 730 15 27 C 25 35 1 762 25 27 C KCl 1 M KCl 0 1 M KCl 0 01 M Saturated NaCl 1 906 1 937 15 34 C 2 041 1 978 1 997 25 34 C 2 101 T2 should be selected as a typical...

Page 28: ... Hold Data Unit C F switchable o ATC 0 50 C View Cali Information Waterproof IP65 Size TDS Factor Temp Coefficient Normalization Temp 0 4 1 00 Built in NaCl conductivity to TDS conversion factor Built in NaCl Temp Coefficient o 0 4 0 C o 0 4 0 C o 20 or 25 C o 20 or 25 C o Fixed at 25 C 8361 8371 10 1 70 0 ppt NaCl 0 01ppt or WARRANTY The meter is warranted to be free from defects in material and ...

Page 29: ...against possible damage or loss Other related water quality products Benchtop Series a 86501 86551 pH mV meter printer b 86502 86552 pH mV ORP meter printer c 86504 86554 pH mV ORP Cond meter printer d 86505 86555 pH mV ORP Cond TDS Salinity meter printer Handheld Series a 8601 pH mV meter b 9861 pH mV logger printer c 9661 pH mV logger d 8551 8651 ORP meter e 8301 06 Conductivity meter f 8401 03 ...

Page 30: ...er Sound Level Meter Air Flow meter Infrared Thermometer K type Thermometer K J T type Thermometer K J T R S E type Thermometer pH Meter Conductivity Meter T D S Meter D O Meter Saccharimeter Manometer Tacho Meter Lux Light Meter Moisture Meter Data logger Temp RH transmitter Wireless Transmitter 2011 06 v02 www ponpe com ...

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