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Accumet AP75, Руководство по эксплуатации

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34

P4.4 Setting the TDS factor

The concentration of salts dissolved in solution increases the conductivity of that
solution. This relationship varies from salt to salt and is roughly linear over a given
range for a given salt. The TDS conversion factor is the number used by the meter to
convert from conductivity to TDS.

To determine the conductivity to TDS conversion factor for your solution: 
• Addendum 2 on page 46 lists some commonly used conversion factors. 
• Addendum 3 on page 47 describes how to calculate the TDS conversion factor for

other solutions.

You can set the TDS conversion factor between 0.4 and 1.0; meter default is 0.5.

From measurement mode

1. 

Press Setup key 

to enter Set Up mode.

2.

Press the 

▲

and 

▼

keys

to scroll

through subgroups until you view
parameter P4.0. 

See figure

3. 

Press the ENTER key

five times to

select parameter 4.4. The upper display
shows “tdS” and the lower display
shows “P4.4”.

See figure

4.

Press the ENTER key again

. The upper

display shows a value and the lower 
display shows “tdS”.

See figure

5.

Calculate the TDS factor of your 
solution.

See Addendum 3 on page 49

for information on how to calculate the
TDS factor.

6.

Press the 

▲

and 

▼

keys

to select your

calculated TDS conversion factor.

7.

Press the ENTER key

to confirm 

selection and to return to the subgroup
menu. Press the CAL/MEAS key to
return to measurement mode.

H

H

I

I

J

J

Содержание AP75

Страница 1: ......

Страница 2: ...OPERATING INSTRUCTIONS Printed1 02 MODE HOLD ENTER RANGE ON OFF CAL MEAS MI MR SETUP ATC READY MEAS C S IP 67 accumet 13636AP75A Portable Waterproof Conductivity Meter...

Страница 3: ...4 5 Temperature calibration 16 5 Measurement 17 22 5 1 Automatic Temperature Compensation ATC 17 5 2 Manual Temperature Compensation 18 19 5 3 Taking measurements 20 5 4 Using manual ranging function...

Страница 4: ...al time clock 38 39 7 9 Program 8 0 Resetting to factory defaults 40 8 Probe care and maintenance 41 9 Troubleshooting 42 10 Error Messages 43 11 Specifications 44 12 Addendum 1 Calibration tips 45 13...

Страница 5: ...proof and it floats Meter features a built in real time clock expanded memory and many other user friendly features all of which are accessible through the membrane keypad Meter includes a Ultem Stain...

Страница 6: ...13 9 6 7 8 1 SETup mode indicator 2 MEASurement mode indicator 3 CALibration indicator 4 MEMory recall mode indicator 5 millisiemens indicator 6 microsiemens indicator 7 parts per thousand indicator...

Страница 7: ...ion mode see page 16 for directions ENTER RANGE ENTER function Press to confirm values in Calibration mode and to confirm selections in Setup mode RANGE function Press to enter manual ranging function...

Страница 8: ...are included with your meter 1 Use a Phillips screwdriver to remove the two screws holding the battery cover See figure below 2 Lift off battery cover to expose batteries 3 Insert batteries Follow the...

Страница 9: ...Temperature Compensation ATC It has a specially designed housing that provides fast tempera ture response and reduces air bubble entrap ment which makes it easy to obtain accurate stable readings Wett...

Страница 10: ...ck into place See figure below 2 To remove probe turn the locking ring counterclockwise on the probe connector Pull probe away from the meter CAUTION Do not pull on the probe cord or the probe wires m...

Страница 11: ...3 S in the 0 to 1999 S range and you recalibrate at 1500 S also in the 0 to 1999 S range the meter will replace the old calibration data 1413 S in that range The meter will retain all calibration data...

Страница 12: ...euse calibration solutions after calibration Contaminants in the solution can affect the calibration and eventually the accuracy of the measurements Use fresh calibration solution each time you calibr...

Страница 13: ...The CAL indicator will appear in the upper right corner of the display 5 Press the MI or MR to change the value on the primary display to match the value of the calibration standard See figure 6 Pres...

Страница 14: ...surement to calibration mode To exit from Conductivity Calibration mode without confirming calibration DO NOT press ENTER in step 6 Press CAL MEAS instead This will retain the meter s old calibra tion...

Страница 15: ...d the upper steel band Stir the probe gently to create a homogeneous sample Allow time for the reading to stabilize See figure 4 Press CAL MEAS to enter TDS calibration mode The CAL indicator will app...

Страница 16: ...commonly used conversion factors Addendum 3 on page 47 describes how to calculate the TDS conversion factor for other solutions Enter the TDS conversion factor into your meter as follows A A B B C C F...

Страница 17: ...ature sensor to stabilize 6 Scroll with the and keys to set the correct temperature value i e the temperature of the temperature bath You can adjust the reading in increments of 0 1 C See figure 7 Onc...

Страница 18: ...atic temperature compensation ATC simply plug the conductivity TDS probe into the meter see page 9 for direc tions The ATC indicator will light on the LCD See figure Notes If the ATC indicator does no...

Страница 19: ...ATC and the lower display shows YES or NO See figure 5 Press the and keys to select the Automatic Temperature Compensation feature on of off YES ATC on NO ATC off 6 Press the ENTER key to confirm sele...

Страница 20: ...calibration mode The CAL indicator will appear above the primary display See figure 4 While in conductivity or TDS calibration mode press the MODE key to enter tem perature calibration mode The prima...

Страница 21: ...ime for the reading to stabilize Note the reading on the display 5 Press the MODE key to toggle between conductivity and TDS readings Taking Measurements A A 5 3 Taking measurements with READY indicat...

Страница 22: ...e primary display Press RANGE until the correct range is selected See figure The meter resets to the Auto ranging function once it is turned off You will have reset the manual ranging function each ti...

Страница 23: ...automatically after 30 minutes of nonuse If the meter is shut off either automatically or manually the HOLD value will be lost For longer storage use the memory functions see pages 23 24 NOTE Your met...

Страница 24: ...ture date and time 6 1 A To store a reading 1 During any measurement function MEAS press the MI key to input any data into the memory 2 MEM Sto and memory number will flash The meter then returns to m...

Страница 25: ...o the next memory location screen See figure 5 If necessary press the key to select the next memory location screen press the key to select the previous memory location screen 6 Repeat steps 2 5 to re...

Страница 26: ...er features different sub groups that organize all set up parameters The sub groups are 1 P1 0 Memory clear CLR 2 P2 0 Viewing calibration data CAL 3 P3 0 Viewing probe data ELE 4 P4 0 Unit configurat...

Страница 27: ...t for fourth range P3 4 Effective cell constant for fifth range P1 0 Memory clear P1 0 Clear all stored readings P2 0 Viewing previous calibration data P2 1 First range calibration point P2 2 Second r...

Страница 28: ...usting temperature coefficient P5 2 Adjusting normalization temperature P6 0 Selecting cell constant P6 1 Selecting cell constant K 1 0 10 or 0 1 Instructions on page 35 36 Instructions on page 37 Ins...

Страница 29: ...A A B B From measurement mode 1 Press the Set up key to enter Set Up mode 2 Press the and keys to scroll through subgroups until you view parameter P1 0 See figure 3 Press the ENTER key to enter para...

Страница 30: ...l calibration data you will automatically return to the subgroup menu Press the CAL MEAS key to return to measure ment mode Notes If there is no previous calibration data at a particular point the pri...

Страница 31: ...ill automatically return to the subgroup menu Press the CAL MEAS key to return to measurement mode Notes Cell constants will degrade with time and usage You can use this feature to alert you to the ne...

Страница 32: ...to measurement mode Notes Meter default is set for Ready indicator on and auto endpoint function off P4 0 Unit configuration P4 1 READY indicator and auto endpoint function Program P4 1 lets you selec...

Страница 33: ...Up mode 2 Press the and keys to scroll through subgroups until you view parameter P4 0 See figure 3 Press the ENTER key two times to select parameter 4 2 See figure 4 Press the and keys to toggle bet...

Страница 34: ...ou view parameter P4 0 See figure 3 Press the ENTER key three times to select parameter 4 3 The upper display shows ATC and the lower display shows P4 3 See figure 4 Press the ENTER key again The uppe...

Страница 35: ...onversion factor between 0 4 and 1 0 meter default is 0 5 From measurement mode 1 Press Setup key to enter Set Up mode 2 Press the and keys to scroll through subgroups until you view parameter P4 0 Se...

Страница 36: ...subgroups until you view parameter P5 0 See figure 3 Press the ENTER key to select parameter 5 1 The display shows T CO on the upper display See figure 4 Press the ENTER key again The upper display sh...

Страница 37: ...and keys to scroll through subgroups until you view parameter P5 0 See figure 3 Press the ENTER key three times to select parameter 5 2 The display shows t nr on the upper display See figure 4 Press t...

Страница 38: ...t Up mode 2 Press the and keys to scroll through subgroups until you view parameter P6 0 See figure 3 Press the ENTER key to select parameter 6 1 See figure 4 Press the and keys to select the between...

Страница 39: ...gits will flash See figure 4 Press the and keys to toggle to the correct century 5 Press the ENTER key to confirm the century and move to year selection The year digits will flash See figure 6 Press t...

Страница 40: ...igure 14 Press the and keys to toggle to the correct minutes 15 Press the ENTER key to confirm the minutes and move to second selec tion The second digits will flash See figure 16 Press the and keys t...

Страница 41: ...o enter Set Up mode 2 Press the and keys to scroll through subgroups until you view parameter P8 0 See figure 3 Press the ENTER key to enter parameter P8 0 See figure 4 Press the and keys to toggle be...

Страница 42: ...with your solutions Readings will rise over a period of time while you soak your probe Do not immerse the probe in oily solutions Clean the electrode thoroughly by stirring it in a mild detergent bat...

Страница 43: ...tteries or attach optional AC adapter Unstable a Air bubbles in probe a Tap probe to remove bubbles readings b Dirty probe b Clean the probe and recalibrate c Probe not deep c Make sure sample entirel...

Страница 44: ...ry write Hardware failure Turn meter on and off in primary error again If message persists display return unit Err 2 Memory checksum Hardware failure Turn meter on and off in primary error again If me...

Страница 45: ...r F Cell constant 1 0 0 1 or 10 selectable cell constant of included cell 1 0 Temperature compensation Automatic or manual 0 to 50 C 32 to 122 F Temperature coefficient 0 to 10 per C or F TDS factor a...

Страница 46: ...accuracy If you are measuring in the mid ranges and you washed the probe in deionized water and stored it dry calibrate the meter at least once a month Wet the probe for 10 minutes before calibrating...

Страница 47: ...nductivity to ppm values and conversion factors for future reference Factor actual TDS Actual Conductivity 25 C C onductivity TDS KCl TDS NaCl TDS 442 2 TDS Your Material 3 at 25 C ppm Factor 1 ppm Fa...

Страница 48: ...Value from the solution bottle label or as a standard you make using high purity water and precisely weighed salts Actual Conductivity Value measured using a properly calibrated Conductivity Temperatu...

Страница 49: ...ice to return to measurement mode 2 Wait for 5 minutes Note T1 and CT1 conductivity at T1 3 Condition the sample solution and probe to a temperature T2 that is about 5 C to 10 C different from T1 and...

Страница 50: ...No offset for effective cell constant 3rd range P3 4 1 0 No offset for effective cell constant 4th range P3 5 1 0 No offset for effective cell constant 5th range P4 1 Ready indicator READY ON Ready i...

Страница 51: ...50...

Страница 52: ...51...

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