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4. MEASUREMENT

4.1 Taking Measurements
1.

Before measurement, rinse the pH/ORP electrode or Ion Selective
Electrode (ISE) and temperature probe thoroughly with tap or distilled
water to remove any impurities on the bodies of probes.

2.

Power on the meter using the

ON

key. Press the

MODE

key to select the

desired mode of operation (pH, mV, Ion or Temperature).

3.

Dip both probes gently in the test sample, stir gently and wait for the
reading to stabilize. Note the reading. Freeze the displayed reading if
necessary, for details refer to Section 4.3.

4.

Rinse the probes with tap water or rinse water thoroughly before taking the
next sample measurement or storing the probes.

4.2 Millivolt (mV) Reference Check

The mV mode is used for the diagnosis of ISE or pH electrode condition. Press
the

MODE

key to access the mV mode, the “

mV

” annunciator is displayed.

The displayed value shows the absolute mV value of the ISE or pH electrode
being measured.

4.3 Holding a Reading

To freeze or hold the displayed reading, press the the

HOLD

key once. The

LCD will display the “

HO

” annunciator to indicate the

HOLD

function is

activated.

4.4 Releasing a Held Reading

Press the

HOLD

key once again to deactivate the

HOLD

function or to

release the frozen reading. The meter reverts to the current measurement
mode, and the “

HO

” annunciator disappears from the LCD.

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Содержание pHPLUS DIRECT

Страница 1: ...Instruction Manual pHPLUS DIRECT pH mV ISE Meter Code 5 1936...

Страница 2: ......

Страница 3: ...ed applications of the pHPLUS DIRECT meter as possible If there are doubts in the use of this meter please do not hesitate to contact the LaMotte Tech Service Department LaMotte will not accept any re...

Страница 4: ...2 1 Resetting the User Calibrated Values 11 3 2 2 pH Calibration using USA standard buffers 12 3 2 3 pH Calibration using NIST standaard buffers 13 3 2 4 pH Calibration using Pb Standard buffers 14 3...

Страница 5: ...ECT measures pH mV ORP temperature and ion concentration of various ions mono and di valence with ion selective electrodes ISEs Included with your meter are a robust rubber boot 4 alkaline AAA batteri...

Страница 6: ...you were in before turning the meter off Selects measurement mode for Ion mV pH and Temperature Allows calibration for Ion pH mV or Temperature or to abort calibration without confirming any set value...

Страница 7: ...condition 2 3 Inserting Removing the Rubber Boot 1 To remove the meter from the rubber boot push out the bottom edges of the meter until it is completely out of the boot Ensure that the cables of the...

Страница 8: ...ator in the LCD alerts you when battery power is running low Replace the batteries with the type recommended by the manufacturer Caution Power off the meter when changing the batteries 2 6 Connecting...

Страница 9: ...momentarily as the meter performs a self diagnostic test as shown in section 2 2 The meter will be in the Ion measurements mode if the meter has not been calibrated or reset The display will show 2 P...

Страница 10: ...rrect pH buffer values during calibration If non standard pH buffers other than the above standards are used or the electrode has worn out the LCD will flash Er1 Press the CAL key to abort calibration...

Страница 11: ...e buffer selection mode Use the MODE key to toggle between USA NIST or Pb standards as shown 3 Press the ENTER key to confirm the buffer standards to be used The display then reverts to pH measurement...

Страница 12: ...L key to enter the pH calibration mode CA will be displayed momentarily and the display will flash with the current uncalibrated reading 4 To abort or cancel the calibration without accepting the new...

Страница 13: ...key to enter the pH calibration mode CA will be displayed momentarily and the display will flash with the current uncalibrated reading 4 To abort or cancel the calibration without accepting the new v...

Страница 14: ...on 3 Press the CAL key to enter the pH calibration mode CA will be displayed momentarily and the display will flash the current uncalibrated reading 4 To abort or cancel the calibration without accept...

Страница 15: ...oints are not within 1 decade an error message Er4 will be shown at the end of calibration process The ion calibration options available include 0 1 1 0 10 0 100 0 ppm Recalibrate and ensure that all...

Страница 16: ...ppm press q key once to select 1 0 ppm Use the p or q key to select other options like 0 1 10 0 or 100 0 ppm 5 Press the ENTER key and the displayed value will show the corresponding measured mV readi...

Страница 17: ...s will appear in the LCD if the calibration was unsuccessful with no values stored into memory 3 4 TEMPERATURE CALIBRATION 3 4 1 With Temperature probe The temperature probe provided with the meter is...

Страница 18: ...the LCD 2 Compare the displayed value to a NIST certified thermometer or thermometer known to be accurate dipped into a constant temperature bath 3 Press the CAL key to enter the temperature calibrat...

Страница 19: ...p water or rinse water thoroughly before taking the next sample measurement or storing the probes 4 2 Millivolt mV Reference Check The mV mode is used for the diagnosis of ISE or pH electrode conditio...

Страница 20: ...er cleaning the electrode 6 TROUBLESHOOTING Problem Cause Solution No display Batteries not in place a Insert batteries b Re insert batteries with correct polarity LO displays in the LCD Low battery R...

Страница 21: ...00 10 01 USA pH 4 01 6 86 9 18 NIST pH 4 10 6 97 Pb Temperature Range 0 0 to 100 0 C Accuracy 0 5 C Temperature Comp Automatic Manual 0 to 100 C Millivolt Range 500 to 500 mV Resolution 0 1 mV for 200...

Страница 22: ...rolyte ionic strength adjuster pipet and replacement membrane Ammonia only 9 WARRANTY Repairs Should it be necessary to return the meter for repair or servicing pack the meter carefully in a suitable...

Страница 23: ...following circumstances Damage due to operator negligence misuse accident or improper application Damage or alterations from attempted repairs by an unauthorized non LaMotte service Damage due to impr...

Страница 24: ...E COMPANY Helping People Solve Analytical Challenges PO Box 329 Chestertown Maryland 21620 USA 800 344 3100 410 778 3100 Outside U S A Fax 410 778 6394 Visit us on the web at www lamotte com 626094 29...

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