Hanna Instruments HI 98150N User Manual

Instruction Manual

HI 98140 HI 98150

HI 98160

Calibration Check

pH/mV/Temperature

Meters

www.hannainst.com

Dear Customer, Thank you for choosing a Hanna Instruments product. Please read this instruction manual carefully before using the instruments. This manual will provide you with the necessary information for correct

use of the instruments, as well as a precise idea of their versatility. If you need additional technical information, do not hesitate to e-mail us

at tech@hannainst.com.

WARRANTYWARRANTY

WARRANTY

WARRANTYWARRANTY

HI 98140, HI 98150 and HI 98160 are guaranteed for two years against defects in workmanship and materials when used for their intended purpose and maintained according to instructions. Electrodes and probes are guaranteed for six months. This warranty is limited to repair or replacement free of charge. Damage due to accidents, misuse, tampering or lack of prescribed maintenance is not covered. If service is required, contact the dealer from whom you purchased the instrument. If under warranty, report the model number, date of purchase, serial number and the nature of the problem. If the repair is not covered by the warranty, you will be notified of the charges incurred. If the instrument is to be returned to Hanna Instruments, first obtain a Returned Goods Authorization number from the Technical Service department and then send it with shipping costs prepaid. When shipping any instrument, make sure it is properly packed for complete protection.

TABLE OF CONTENTSTABLE OF CONTENTS

TABLE OF CONTENTS

TABLE OF CONTENTSTABLE OF CONTENTS

WARRANTY ........................................................................................................... 2

PRELIMINARY EXAMINATION ................................................................................. 3

GENERAL DESCRIPTION ......................................................................................... 3

FUNCTIONAL DESCRIPTION .................................................................................... 5

SPECIFICATIONS ................................................................................................... 7

OPERATIONAL GUIDE ............................................................................................. 8

pH CALIBRATION ................................................................................................. 11

pH BUFFER TEMPERATURE DEPENDENCE ............................................................ 16

RELATIVE mV CALIBRATION (HI 98150 & HI 98160) .............................................. 17

GOOD LABORATORY PRACTICE (GLP) ..................................................................... 18

SETUP ................................................................................................................ 21

LOGGING ............................................................................................................. 23

AutoEnd ............................................................................................................. 25

TEMPERATURE CALIBRATION (for technical personnel only) .................................. 26

mV CALIBRATION (HI 98160 only) (for technical personnel only) .......................... 27

PC INTERFACE ..................................................................................................... 28

BATTERIES REPLACEMENT .................................................................................... 33

LCD MESSAGE GUIDE ........................................................................................... 34

TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS ....................................... 36

ELECTRODE CONDITIONING & MAINTENANCE ....................................................... 37

TROUBLESHOOTING GUIDE .................................................................................. 40

ACCESSORIES ..................................................................................................... 41

PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION

PRELIMINARY EXAMINATION

PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION

Remove the instrument from the packing material and examine it carefully to make sure that no damage has occurred during shipping. If there is any damage, notify your Dealer or the nearest Hanna Customer Service Center.

Each instrument is supplied with:

• HI 1230B Non refillable Combination double-junction, pH Electrode with gelled electrolyte (HI 98160)

• HI 1618D Amplified pH electrode with built-in temperature sensor and EEPROM and DIN connector. (HI 98140 & HI 98150)

• HI 7662 stainless steel Temperature Probe with 1 m (3.3') Cable (HI 98160)

• pH 4.01 & 7.01 Buffer Solutions (20 mL each)

• HI 70000 electrode cleaning solution

• 3 x 1.5V AAA Batteries

• Instruction Manual

• Rugged Carrying Case

Note: Save all packing material until you are sure that the instrument

functions correctly. All defective items must be returned in the original packing with the supplied accessories.

GENERAL DESCRIPTIONGENERAL DESCRIPTION

GENERAL DESCRIPTION

GENERAL DESCRIPTIONGENERAL DESCRIPTION

HI 98140, HI 98150 and HI 98160 are state-of-the-art, hand held pH meters, designed to provide laboratory results and accuracy under harsh industrial conditions.

These instruments are provided with a series of new diagnostic features which add an entirely new dimension to the measurement of pH, by allowing the user to dramatically improve the reliability of the measurement:

• 7 automatically recognized pH buffers (pH 1.68, 4.01, 6.86, 7.01,

9.18, 10.01 and 12.45) for calibration

• pH calibration up to three (HI 98140) and five (HI 98150 & HI 98160) calibration points

• Custom calibration by entering up to two custom buffers

• Messages on the LCD to guide the user through instrument operation

• Diagnostic features to alert the user when the electrode needs cleaning

• Outside Calibration Range warning

• Monitoring of the electrode’s aging

• User-selectable “calibration time out” to remind the user when a new calibration is necessary.

HI 98140 and HI 98150 works with SMART amplified electrodes. These electrodes incorporate a chip, which stores the calibration data performed with a specific instrument.

When the SMART electrode is attached to the meter again, it is automatically recognized. This technology allows the operator to optimize time and efficiency with unsurpassed safety. It avoids erroneous measurements taken in the event the pH electrode is substituted after calibration. This series of electrodes also incorporates a temperature sensor, eliminating the need for an additional temperature probe. They also offer an extended temperature range from –20 ºC to 120 ºC (–4 ºF to 248 ºF). These instruments can also measure with ORP electrodes (HI 98150 & HI 98160), thanks to their capability to measure mV with a resolution up to 0.1 mV. Other features include:

• Relative mV measurements (HI98150 & HI 98160)

• Log on demand (500 samples)

• Auto Hold feature, to freeze first stable reading on the LCD

• GLP feature, to view last calibration data for pH, Rel mV

• PC interface

The Battery Error Preventing System (BEPS) detects when the batteries become too weak to ensure reliable measurements. The backlight feature is automatically disabled when batteries are getting low and a clear indication is displayed to warn the user of this condition. However, the meter continues to measure correctly even when the low battery indication is displayed. The meter automatically switches itself off when the batteries are too weak to support proper function. In addition, the meters allow the user to enter an ID code to uniquely identify the instrument.

FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION

FUNCTIONAL DESCRIPTION

FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION

HI 98140 & HI 98150

HI 98160

1) Liquid Crystal Display (LCD).

2) Range key, to select pH or mV range (HI 98150 & HI 98160

only). Setup key, to enter/exit SETUP mode.

3) On/Off key, to turn the instrument ON and OFF.

4) CAL key, to enter/exit calibration mode. GLP key, to display Good Laboratory Practice information.

5) 2nd key, to select second key function.

6) key, to manually increase temperature or other parameters. Mode key, to select measurement resolution, 0.1 pH / 0.01 pH, or to toggle between mV and Rel mV (HI 98150 & HI 98160 only).

7) USB connector.

8) Battery compartment cap.

9) Temperature probe socket (HI 98160).

10) BNC electrode connector (HI 98160).

11) DIN connector for SMART electrode (HI 98140 & HI 98150).

12) key, to manually decrease temperature or other parameters.

RCL key, to enter/exit view logged data mode.

13) Log key, to store measured data. CFM key, to confirm calibration point, confirm delete record or confirm different set values.

14) AutoEnd key, to freeze first stable reading on the LCD. CLR key, to clear calibration or enter delete logged data screen.

15) Light key, to toggle display backlighting.

16) Secondary LCD.

17) Primary LCD.

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SPECIFICATIONSSPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONSSPECIFICATIONS

OPERATIONAL GUIDEOPERATIONAL GUIDE

OPERATIONAL GUIDE

OPERATIONAL GUIDEOPERATIONAL GUIDE

INITIAL PREPARATION

The instrument is supplied complete with batteries. For placing the batteries inside the meter, see page 33. To prepare the instrument for use, connect the pH electrode to the input socket on the top of the instrument. For HI 98160 connect the temperature probe to the temperature socket too. The temperature probe is used in conjunction with the pH electrode for pH temperature compensation, but it can also be used independently to take temperature measurements. If the probe is disconnected, temperature can be set manually with the ARROW keys (see page 9 for details). Turn the instrument ON by pressing On/Off.

At start-up the display will show all the available segments for a few seconds (or while the button is held), followed by the percentage indication of the remaining battery life. The meter is now ready to operate. After measurement switch the instrument off, remove the electrodes, clean the electrode and store it with a few drops of HI 70300 storage solution in the protection cap. Note: In order to avoid error conditions when working with SMART

electrodes, be sure the electrode is connected before the instrument is turned ON and is disconnected only after the instrument is

turned OFF. The auto-off feature turns the instrument off after a set period (default 20 min) to save battery life. To set another period or to disable this feature, see SETUP menu on page 21. The auto-off backlight feature turns the backlight off after a set period (default 1 min). To set another period or to disable this feature, see SETUP menu on page 21.

pH MEASUREMENTS

To take a pH measurement remove the electrode protective cap and simply submerse the tip of the electrode (3cm/1¼”) and the temperature probe (HI 98160 only) into the sample to be tested. If necessary, press Range until the display changes to the pH mode. Allow the electrode to equilibrate and reading to stabilize (hourglass symbol will turn off).

3cm (1¼”)

The LCD will show the pH measurement together with the temperature of the sample. In order to take more accurate pH measurements, make sure that the electrode and instrument is calibrated (see page 11 for details).

Hanna recommends to keep the pH electrode wet and to rinse throughly with the sample before measurements. The pH reading is directly affected by temperature. In order for the instrument to measure the pH accurately, temperature must be taken into consideration. If the sample temperature is different from the ambient temperature, allow a few minutes for the pH electrode to reach thermal equilibrium. The HI 1618D pH sensor contains an integral temperature sensor so the pH reading is automatically temperature compensated (ATC) on the HI 98140 and HI 98150. If the temperature is out of range (due to temperature sensor failure) these instruments will enter MTC mode and permit temperature values to be set manually using the ARROW keys. To use the instrument's Automatic Temperature Compensation feature for HI 98160, connect and submerse the temperature probe into the sample as close to the electrode as possible and wait for a few seconds.

If manual temperature compensation (MTC) is desired, the temperature probe must be disconnected from the instrument (HI 98160 only).

The display will show the default temperature of 25 ºC, the last measured temperature reading, or the last set temperature, with the “ºC” (or “ºF”) tag blinking.

The “MTC” tag and arrow symbols light up on the LCD to indicate that the instrument is in MTC mode and the arrow keys can be used to enter the desired temperature value.

Note: When in MTC the user can press and hold the ARROW keys to

set the measurement temperature. The instrument will start

incrementing/decrementing the temperature value. The instrument

keeps measuring using the MTC value for temperature compensated

pH and the display is updated.

ORP MEASUREMENTS (HI 98150 & HI 98160 only)

To perform ORP measurements, connect an optional ORP electrode (see Accessories section) to the instrument and turn it ON. If necessary, enter the mV mode by pressing Range until the display changes to mV.

3cm (1¼”)

Submerse the ORP electrode tip (3cm/1¼”) into the sample to be tested and wait a few seconds for the reading to stabilize. Measurements within the ±699.9 mV range are displayed with 0.1 mV resolution, while outside this range the resolution automatically switches to 1 mV. The “ATC” (or “MTC”) tag is turned off because ORP measurements are not temperature compensated. For accurate ORP measurements, the surface of the electrode must be clean and smooth. Pretreatment solutions are available to condition the electrode and improve its response time (see Accessories section, page 41).

RELATIVE mV MEASUREMENTS (HI 98150 & HI 98160 only)

To enter Relative mV mode, press 2nd then Mode while in mV measurement mode. The

relative mV reading will be displayed on the primary LCD and the current temperature value on the secondary LCD. Relative mV is an operation mode in which the displayed electrode potential (mV) can be changed by means of a calibration control offset. See page 17.

TEMPERATURE MEASUREMENTS

The pH electrodes used for HI 98140 and HI 98150 also include an integral temperature measuring element. For HI 98160 connect the HI 7662 temperature probe to the appropriate socket, submerse the temperature probe into the sample and permit it to equilibrate by watching the reading on the secondary LCD. If the temperature is out of range, or the temperature probe is not connected (HI 98160 only) the instruments will display the last in range temperature reading and enter MTC mode (see page 9). Note: The temperature can be displayed in Celsius degrees (ºC) or in

Fahrenheit degrees (ºF) (see SETUP for details, page 21).

BACKLIGHT FEATURE

The instrument is provided with a Backlight feature to enhance display readability in low light conditions. It can be easily toggled on and off through the keypad by pressing Light.

Note: The backlight automatically shuts off after a set time period to

save battery life (see SETUP for details, page 21). If battery percentage is less than 20% the backlight can not be ON.

H CALIBRATIONH CALIBRATION

H CALIBRATION

H CALIBRATIONH CALIBRATION

Hanna recommends frequent calibrations, especially if high accuracy is required. The pH range should be recalibrated:

• Whenever the pH electrode is replaced.

• At least once a week, but daily is recommended.

• After testing aggressive chemicals.

• After electrode is cleaned.

• When calibration alarm time out is expired - “Cal Due” tag blinks (if

feature is enabled).

• If “Outside Cal Range” message blinks during pH measurement

(the measurement range is not covered by current calibration).

PROCEDURE

The instrument offers a choice of 7 buffers that are automatically recognized (1.68, 4.01, 6.86, 7.01, 9.18, 10.01 and 12.45 pH) and also allows the user to enter two more pH values for calibration, “Custom 1” and “Custom 2”. The set custom buffers are the buffer values at 25 ºC. HI 98160 offers also 3.00 pH buffer choice for wine measurement. When a custom buffer is selected during calibration, the “Custom” tag is displayed on the LCD and its value can be changed in a ±1.0 pH window, around the set value, in accordance with current temperature. For accurate pH measurements, it is recommended to perform a five-point (HI 98150 & HI 98160) calibration respectevely a three-point (HI 98140) calibration. However, at least a two-point calibration is suggested. The instrument will automatically skip the buffers used during calibration and the buffers which are in a ±0.2 pH window, around one of the calibrated buffers.

• Pour small quantities of selected buffer solutions into clean beakers.

For accurate calibration use two beakers for each buffer solution, the first one for rinsing the electrode and the second one for calibration.

• Remove the protective cap and rinse the electrode with some of the

buffer solution to be used for the first calibration point.

FIVE-POINT CALIBRATION (HI 98150 & HI 98160)

• Submerse the pH electrode and the temperature

probe approximately 3 cm (1¼”) into a buffer solution of your choice (pH 1.68, 4.01, 6.86,

7.01, 9.18, 10.01, 12.45 or a custom buffer) and stir gently. The temperature probe should be close to the pH electrode.

• Press CAL. The instrument will display the

measured pH on the primary LCD and “7.01” buffer on the secondary LCD, together with “CAL” and “Cal Point 1” tags.

3cm (1¼”)

• If necessary, press the ARROW keys to select a different buffer value.

• The “ ” tag will blink on the LCD until the reading is stable.

• When the reading is stable and close to the selected buffer, “CFM”

tag blinks.

• Press CFM to confirm calibration.

• The calibrated value is then displayed on

the primary LCD and the secondary LCD will display the second expected buffer value, together with “CAL” and “Cal Point 2” tags.

• After the first calibration point is confirmed,

submerse the pH electrode and the temperature probe (if required) approximately 3 cm (1¼”) into the second buffer solution and stir gently. The temperature probe should be close to the pH electrode.

• If necessary, press the ARROW keys to select the appropriate buffer value.

• The “ ” tag will blink on the LCD until the reading is stable.

• When the reading is stable and close to the selected buffer, “CFM”

tag blinks.

• Press CFM to confirm calibration.

• The calibrated value is then displayed on the primary LCD and the

secondary LCD will display the third expected buffer value.

• After the second calibration point is confirmed, submerse the pH

electrode and the temperature probe approximately 3 cm (1¼”) into the third buffer solution and stir gently. The temperature probe should be close to the pH electrode.

• If necessary, press the ARROW keys to select a different buffer value.

• The “ ” tag will blink on the LCD until the reading is stable.

• When the reading is stable and close to the selected buffer, “CFM”

tag blinks.

• Press CFM to confirm calibration.

• The calibrated value is then displayed on the primary LCD and the

secondary LCD will display the fourth expected buffer value.

• After the third calibration point is confirmed, submerse the pH

electrode and the temperature probe approximately 3 cm (1¼”) into the fourth buffer solution and stir gently. The temperature probe should be close to the pH electrode.

• If necessary, press the ARROW keys to select a different buffer value.

• The “ ” tag will blink on the LCD until the reading is stable.

• When the reading is stable and close to the selected buffer, “CFM”

tag blinks.

• Press CFM to confirm calibration.

• The calibrated value is then displayed on the primary LCD and the

secondary LCD will display the fifth expected buffer value.

• After the fourth calibration point is confirmed, submerse the pH

electrode and the temperature probe approximately 3 cm (1¼”) into the fifth buffer solution and stir gently. The temperature probe should be close to the pH electrode.

• If necessary, press the ARROW keys to select a different buffer value.

• The “ ” tag will blink on the LCD until the reading is stable.

• When the reading is stable and close to the selected buffer, “CFM”

tag blinks.

• Press CFM to confirm calibration.

• The instrument stores the calibration values and

returns to normal measurement mode.

Note: For HI 98140 calibration proceed as in the FIVE-POINT CALIBRATION

above. After the third point is confirmed the instrument stores the

calibration value and returns to measurement mode.

FOUR, THREE or TWO-POINT CALIBRATION

• Proceed as described in FIVE-POINT CALIBRATION section.

• Press CAL after the appropriate accepted calibration

point. The instruments will return to measurement mode and will memorize the calibration data.

ONE-POINT CALIBRATION

Two SETUP selectable options are available for one-point calibration: “Pnt” and “OFFS”. See page 22 for Setup information using “1Pnt” parameter. If the “Pnt” option is selected, the adjacent slopes will be recalculated using the new calibration value. If the “OFFS” option is selected, an electrode offset correction is performed keeping the existing slopes unchanged, but offsetting all by same value.

• Proceed as described in FIVE-POINT CALIBRATION section.

• Press CAL after the first calibration point was confirmed. The

instruments will memorize the one-point calibration data and will return to measurement mode.

Notes: • Press Range to toggle between pH buffer

and temperature reading during calibration.

• If the value measured by the instrument is not close to the

selected buffer, “WRONG” “ ” and “WRONG” “ ” tags will blink alternately. In this case check if the correct buffer has been selected or used, or regenerate the electrode by following the Cleaning Procedure (see page 39). If necessary, change the buffer or the electrode.

• If the buffer temperature or the manual temperature exceeds

the temperature limits of the buffer, “WRONG” “ ” tags and temperature reading will blink.

• If “WRONG” tag and “OLd” message are displayed on

the secondary LCD, an inconsistency exists between new and previous (old) calibration data. Clear old calibration parameters and proceed with calibration from the current calibration point. The instrument will keep all confirmed values during current calibration.

• With one-point calibration there is no “Condition” and only

the frame is shown. Calibration time out is active.

• Each time a buffer is confirmed, the new calibration parameters replace the old calibration parameters of the corresponding buffer.

If current confirmed buffer has no correspondence in the existing stored calibration and this is not full, the current buffer is added to the existing stored calibration.

If the existing stored calibration is full (five calibration points), after confirming the last calibration point, the instrument will ask which buffer will be replaced by current buffer.

Press the ARROW keys to select another buffer to be replaced. Press CFM to confirm the buffer that will be replaced. Press CAL to exit this function. In this case, the buffer

calibration will not be stored.

Note: The replaced buffer is not removed from the calibration list and

can be selected for the next calibration.

WORKING WITH CUSTOM BUFFERS

If a custom buffer was configured in SETUP menu, it can be selected for calibration by pressing the ARROW keys. The “CUSTOM” tag will be displayed blinking on the LCD.

Press 2nd then Setup if you want to adjust the buffer value to it’s value at the current temperature. The buffer value, displayed on the secondary LCD, will start blinking.

Use the ARROW keys to change the buffer value. After about 5 seconds, the last buffer change

will be updated. Press 2nd then Setup if you want to change it again. Notes: • Custom buffer value can be adjusted in a ±1.00 pH window,

around the set value.

• If you want to return to the set custom buffer value, simply press the ARROW keys ( then ) to select again the custom buffer.

CLEAR CALIBRATION

To clear calibration press 2nd then CLR or CLR alone after entering CAL mode. The “CLr ALL” message will be displayed on the LCD along with “Cal Due” CLR message blinking. All old calibrations, starting with current selected buffer are cleared and the instrument continues calibration. Note: If CLR is pressed during the first calibration point, the instrument

returns to measurement mode.

CONDITION

The display is provided with a 5-dot bargraph (unless the feature is disabled) which gives an indication of the electrode status after calibration as follows:

Bargraph indication Condition value All 5 dots steady 81 to 100% of life

4 dots steady 61 to 80%

3 dots steady 41 to 60%

2 dots steady 21 to 40%

1 dot steady 1 to 20%

1 dot blinking 0%

Only frame is ON No info available

The “condition” bargraph remains active until the end of the calibration day. Note: The electrode condition is evaluated only if current calibration

includes at least two standard buffers.

CLEAN ELECTRODE

Each time pH calibration is performed, the instrument internally compares the new calibration with the one previously stored. When this comparison indicates a significant difference, the “CLEAN” “ ” tags blink on the LCD to advise the user that the pH electrode may need to be cleaned (see ELECTRODE CONDITIONING & MAINTENANCE section for details, page 37). After cleaning, perform a new calibration. Note: If calibration data are cleared, the comparison is done with the

default values.

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