HANNA instruments HI98167 Portable Beer pH Meter Instruction Manual

HANNA instruments HI98167 Portable Beer pH Meter

Specifications

• pH Range: 2.0 to 20.0 pH
• pH Resolution: 0.1 pH
• pH Accuracy: ±0.1 pH
• Temperature Range: 2.00 to 20.00 pH
• Temperature Resolution: 0.01 pH
• Temperature Accuracy: ±0.01 pH
• mV Accuracy: ±0.1 mV
• pH Calibration: Up to five point calibration with standard and custom buffers
• Slope Calibration: From 80 to 110%
• Temperature Compensation: Automatic
• Input Impedance: FC2143 pH & temperature
• Battery Type/Life: On demand, 200 samples (100 pH and 100 mV) without backlight (50 hours with backlight)
• Auto Power Off: User selectable: 5, 10, 30, 60 minutes or disabled
• PC Interface: Optoisolated USB
• Dimensions: 185 x 93 x 35.2 mm (7.3 x 3.6 x 1.4 inches)
• Weight: N/A
• Environment: N/A

Product Usage Instructions

Preliminary Examination
Remove the instrument from the packing material and check for any damage. Contact the local Hanna Instruments Office if damage is found. Keep all packing material until you confirm the instrument functions correctly.

Safety Measures
Ensure the product is suitable for your specific application and environment. Do not introduce variations to the equipment that may affect performance. Avoid placing the instrument in microwave ovens or hazardous environments.

Operational Guide
The pH screen displays temperature measurements and allows for calibration not covered by the current calibration if enabled in the setup.

pH Calibration
Perform pH calibration using up to five-point calibration with standard or custom buffers.

Backlight Feature
The instrument includes a backlight feature that can be toggled on and off by pressing LIGHT on the keyboard. The backlight automatically turns off after a set period.

FAQ

1. Q: How many calibration points does the pH meter support?
   A: The pH meter supports up to five-point calibration with seven standard buffers available.

2. Q: Can the instrument be used in hazardous environments?
   A: It is not recommended to use or store the instrument in hazardous environments for safety reasons.

Dear Customer,
Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before using the instrument. This manual will provide you with the necessary information for correct use of the instrument, as well as a precise idea of its versatility. If you need additional technical information, do not hesitate to e‑mail us at [email protected] or view our worldwide contact list at www.hannainst.com.
All rights are reserved. Reproduction in whole or in part is prohibited without the written consent of the copyright owner, Hanna Instruments Inc., Woonsocket, Rhode Island, 02895, USA. 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, please contact your local Hanna Instruments Office.

Each instrument is supplied with:

• FC2143 Titanium body, flat tip, preamplified pH electrode with internal temperature sensor
• HI700682 Electrode cleaning solution for brewing deposits, (2 pcs.)
• HI720161 Hard carrying case
• HI920015 USB cable
• pH 4.01 & 7.01 Buffer solutions (230 mL each)
• 100 mL Beaker (2 pcs.)
• 1.5V AA Batteries (4 pcs.)
• Instruction Manual and Quick Reference Guide
• Instrument Quality Certificate

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.
Before using this product, make sure it is entirely suitable for your specific application and for the environment in which it is used.
Any variation introduced by the user to the supplied equipment may degrade the meters’ performance. To avoid damages or burns, do not put the instrument in microwave ovens. For your and the instrument’s safety, do not use or store the instrument in hazardous environments. HI98167 is a portable, pH and temperature meter specifically designed for the Beer Industry. It is 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:

• Seven standard buffers (pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01 and 12.45) for calibration.
• pH calibration up to five calibration points (see instrument specifications).
• Custom calibration with up to five custom buffers.
• Messages on the graphic LCD for an easy and accurate calibration.
• Cal Check™ Diagnostic features to alert the user when the electrode needs cleaning.
• Optional user enabled “Outside Calibration Range” warning.
• Monitoring of the electrode aging.
• User selectable “Calibration Time Out” to remind when a new calibration is necessary.

This meter is supplied with a pH electrode specifically designed for use in beer industry. FC2143 is a pH electrode with internal temperature sensor and titanium body.

Other features include:

• Log on demand up to 200 samples (100 pH and 100 mV).
• Auto Hold feature, to freeze first stable reading on the LCD.
• GLP feature, to view last calibration data for pH.
• PC interface.

FRONT VIEW

1. Liquid Crystal Display (LCD).

2. Functional keys.

3. keys to scroll through calibration buffers, setup options, manual temperature compensation and logged data.

4.  ON/OFF ( ) key, to turn the instrument ON and OFF.

5. LIGHT ( ) key to toggle display backlighting.

6. GLP key, to display Good Laboratory Practice information.

7. CAL key, to enter/exit calibration mode.

8. SETUP key, to enter/exit SETUP mode.

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

10. MODE key to change pH resolution.

11. RANGE key, to switch between pH and mV range.

12. HELP key to enter/exit contextual help.

13. ESC to leave current mode, exit calibration, setup, help. etc.
    TOP VIEW

14. Electrode quick connect DIN connector.

15. USB connector.

(pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45), and five custom buffers
Slope Calibration| From 80 to 110%
Temperature Compensation| Automatic
pH Electrode| FC2143 pH & temperature
LOG| On demand, 200 samples (100 pH and 100 mV)
Input Impedance| 10¹² Ω
Battery Type/Life| 1.5V AA batteries (4 pcs.) / approx. 200 hours of continuous use without backlight (50 hours with backlight)
Auto Power Off| User selectable: 5, 10, 30, 60 minutes or disabled
PC Interface| opto‑isolated USB
Dimensions| 185 x 93 x 35.2 mm (7.3 x 3.6 x 1.4”)
Weight| 400 g (14.2 oz)
Environment| 0 to 50 °C (32 to 122 °F) max. RH 100% IP67

INITIAL PREPARATION
The instrument is supplied complete with 1.5V AA (4 pcs.) batteries. For placing the batteries inside the meter, see page 42. Make sure that the protective micro USB cover is used when not connected to a computer to ensure waterproof protection. For HI98167 connect the pH/temperature electrode to the DIN connector. Turn the instrument ON by pressing ON/OFF key. At start‑up the display will show the Hanna Instruments logo for a few seconds followed by the percentage indication of the remaining battery life, then enters the measurement mode. After measurement switch the instrument off, clean the electrode and store it with a few drops of HI70300 storage solution in the protective cap (see page 45). The Auto Power Off feature turns the instrument off after a set period (default 30 min) with no button pressed to save battery life. To set another period or to disable this feature, see SETUP menu on page 23. The Auto Light Off backlight feature turns the backlight off after a set period (default 1 min) with no buttons pressed. To set another period or to disable this feature, see SETUP menu on page 23.

pH MEASUREMENTS

To take a pH measurement remove the electrode protective cap and simply submerge the tip of the electrode (4 cm/1½”) into the sample to be tested. Press RANGE key to choose between pH and mV ranges. Use MODE key to select the pH resolution. Allow time for the electrode to adjust and reading to stabilize (hourglass symbol turns off).

On the pH screen are displayed:

• pH reading with the selected resolution.
• Temperature reading in the selected unit (°C or °F).
• Electrode condition during the calibration day.
• The buffers used in last pH calibration (if feature is enabled in SETUP).
• Battery level indicator.
• Available functional keys.

In order to take more accurate pH measurements, make sure that the instrument is calibrated (see page 11 for calibration details). It is recommended that the electrode is always kept moist and rinsed thoroughly with the sample to be measured before use. The pH reading is directly affected by temperature. For accurate pH measurements, temperature must be taken into consideration. If the sample temperature is different from the temperature at which the pH electrode was kept, allow a few minutes to reach thermal equilibrium.

TEMPERATURE MEASUREMENTS
For HI98167 the temperature sensor is connected through DIN socket.
Note: The temperature can be displayed in Celsius degrees (ºC) or in Fahrenheit degrees (ºF) (see SETUP for details, page 23).

BACKLIGHT FEATURE
The instrument is provided with a Backlight feature, which can be easily toggled on and off through the keyboard by pressing LIGHT.
Note: The backlight automatically shuts off after a set period (see SETUP for details, page 23) with no buttons pressed.
It is recommended to calibrate the instrument frequently, especially if high accuracy is required.

The pH range should be recalibrated:

• Whenever the pH electrode is replaced.
• At least once a week.
• After testing aggressive chemicals.
• When calibration alarm time out is expired ‑ “CAL DUE” blinks (if feature is enabled in SETUP).
• If “Outside Cal Range” message blinks during pH measurement (the measurement range is not covered by current calibration, if feature is enabled in SETUP).

PROCEDURE

HI98167 instrument offers a choice of seven standard buffers (pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01 and 12.45). The meter allow the user to set up to five custom buffers. The custom buffers are the buffer values at 25 °C. When a custom buffer is selected during calibration, the Custom functional key is displayed on the LCD. Press Custom key in order to enter custom buffer changing mode. Use / keys to change the value in a ±1.00 pH window, in according with the temperature reading and then Accept. Press ESC to leave custom buffers value unchanged. For accurate pH measurements, it is recommended to perform a calibration with buffers that bracket the expected pH value. At least, two point calibration is recommended.
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.

• Remove protective cap and rinse the electrode with distilled or deionized water.
• Pour small quantities of selected buffers 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.

FIVE POINT CALIBRATION

Immerse the pH electrode approximately 4 cm (1½”) 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.

Press CAL. The instrument will display the measured pH, the LCD first expected buffer and the temperature reading.

If necessary, press the 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 within range of the selected buffer, CFM functional key is displayed.

• Press CFM to confirm first point.

• The calibrated value and the second expected buffer value is then displayed on the LCD.

• After the first calibration point is confirmed, immerse the pH electrode probe approximately 4 cm (1½”) into the second buffer solution and stir gently.

• If necessary, press the 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 within range of the selected buffer, the CFM functional key is displayed.

• Press CFM to confirm calibration.
• The calibrated value and the third expected buffer value will be displayed.

After the second calibration point is confirmed, immerse the pH electrode approximately 4 cm (1½”) into the third buffer solution and stir gently.

If necessary, press the 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 within range of the selected buffer, the CFM functional key is displayed.

• Press CFM to confirm calibration.

• The calibrated value and the fourth expected value will be displayed.

• After the third calibration point is confirmed, immerse the pH electrode approximately 4 cm (1½”) into the fourth buffer solution and stir gently.

• If necessary, press the 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 within range of the selected buffer, the CFM functional key is displayed.

Press CFM to confirm calibration.

• The calibrated value and the fifth expected buffer will be displayed.
• After the fourth calibration point is confirmed, immerse the pH electrode approximately 4 cm (1½”) into the fifth buffer solution and stir gently.

If necessary, press the 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 within range of the selected buffer, the CFM functional key is displayed.

• Press CFM to confirm calibration.
• The instrument stores the calibration values and returns to normal measurement mode.

FOUR, THREE, TWO or ONE POINT CALIBRATION

• Proceed as described in “FIVE POINT CALIBRATION” section.
• Press CAL or ESC after the appropriate accepted calibration point. The instruments will return to measurement mode and will memorize the calibration data.

FIRST POINT MODE
Two SETUP options are available to determine how the previous calibration will be affected by a subsequent one point calibration. These options are replace or offset. If the Replace option is selected, the slopes between current buffer and nearest lower and higher buffers will be recalculated. If the Offset option is selected, an electrode offset correction is performed keeping unchanged the existing slopes.

ERROR SCREENS

Wrong buffer
The calibration cannot be confirmed.

The pH reading is not within range of the selected buffer. Select another buffer using the / keys or change the buffer.
Electrode Dirty/Broken alternatively with Buffer Contaminated The calibration cannot be confirmed.

The offset of the electrode is not in the accepted range. Check if the electrode is broken or clean it following the Cleaning Procedure (see page 45). Check the quality of the buffer. If necessary, change the buffer.

Wrong slope
The calibration cannot be confirmed.

The evaluated slope is less than the lowest accepted value (80% of default slope).

The evaluated slope is more than the highest accepted value (110 % of default slope).

Wrong old slope
An inconsistency between new and previous (old) calibration is detected. Clear old calibration parameters and proceed with the calibration from the current point. The instrument will keep all confirmed values during current calibration.

Note: For one point calibration the electrode condition is not displayed in the measurement screen. Each time a buffer is confirmed, the new calibration parameters replace the old calibration parameters of the corresponding buffer.
If the 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 calibration point, the instrument will ask which buffer will be replaced by current buffer.

• Press keys to select another buffer to be replaced.
• Press CFM to confirm the buffer that will be replaced.
• Press CAL or ESC to leave replace mode. In this case, the buffer will not be memorized.

Note: The replaced buffer is not removed from calibration list and it can be selected for the next calibration points.

WORKING WITH CUSTOM BUFFERS

If at least one custom buffer was set in SETUP menu, it can be selected for calibration by pressing the keys. The Custom functional key will be displayed.

Press Custom if you want to adjust the buffer value according with current temperature. Use the keys to change the buffer value.

Press Accept to accept new value or ESC to exit changing mode.
Note: Custom buffer value can be adjusted in a ±1.00 pH window, around the set value.

WORKING WITH MILI pH BUFFERS

If calibration is invoked from mili pH range, the calibration buffer can be modified in a ±0.020 pH range in according with the label on the calibration buffer.

Press Change to enter buffer adjust mode.

Use keys to change the buffer value.
Press Accept to accept new value or ESC to exit adjusting mode.

CLEAR CALIBRATION
Press Clear functional key when displayed to clear old calibrations. All old calibrations, are cleared and the instrument continues calibration. The points confirmed in current calibration are kept.
Note: If Clear calibration is invoked during the first calibration point, the instrument returns to measurement mode.

ELECTRODE CONDITION
The display is provided with an icon, and a numeric value (unless the feature is disabled) which gives an indication of the electrode status after calibration. The “condition” 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 WARNING

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 Electrode” warning message is displayed to advise the user that the pH electrode may need to be cleaned (see ELECTRODE CONDITIONING AND MAINTENANCE section for details, page 44).

After cleaning, perform a new calibration.
Note: If the calibration data are cleared, the comparison is done with the default values.
The temperature has an effect on pH. The calibration buffer solutions are affected by temperature changes to a lesser degree than normal solutions. During calibration the instrument will automatically calibrate to the pH value corresponding to the measured temperature.

During calibration the instrument will display the pH buffer value at 25 °C. GLP is a set of functions that allows storage and retrieval of data regarding the maintenance and status of the electrode. All data regarding the pH calibration is stored for the user to review when necessary.

EXPIRED CALIBRATION
The instrument is provided with a real time clock (RTC), in order to monitor the time elapsed since the last pH calibration. The real time clock is reset every time the instrument is calibrated and the “Expired Calibration” status is triggered when the instrument detects a calibration time out. The “CAL DUE” tags will start blinking to warn the user that the instrument should be recalibrated. The calibration time out can be set (see SETUP for details, page 23) from 1 to 7 days or can be disabled. For example, if a 4 days time out has been selected, the instrument will issue the alarm exactly 4 days after the last calibration. However, if at any moment the expiration value is changed (e.g. to 5 days), then the alarm will be immediately recalculated and appear 5 days after the last calibration.
Notes: When the instrument is not calibrated or calibration is cleared (default values loaded) there is no “Expired Calibration”, and the display always shows the “CAL DUE” tags blinking.
When an abnormal condition in the RTC is detected, the instrument forces the “Expired Calibration” status.

LAST pH CALIBRATION DATA

The last pH calibration data is stored automatically after a successful calibration. To view the pH calibration data, press GLP when the instrument is in the measurement mode.

The instrument will display a lot of data including calibration buffer, offset, slope, electrode condition.
Note: Buffers displayed in video inverse mode are from previous calibrations. The custom buffers are marked with an “*” on the right side of the buffer value. “No user calibration” message is displayed if all calibration are cleared or the instrument was not calibrated.
Setup mode allows viewing and modifying the measurement parameters. The following table lists the general SETUP parameters, their valid range and the factory default settings.

| Description| Valid value| Default
---|---|---|---
Backlight| Backlight Level| 0 to 7| 4
Contrast| Contrast Level| 0 to 20| 10
Auto light off| Time until backlight is ON| 1, 5, 10, 30 min| 1
Auto power off| Time after the instrument is powered OFF| Disabled 5, 10, 30, 60 min| 30
Date/Time| | 01.01.2000 to 12.31.2099 00:00 to 23:59| current date/time
Time Format| | AM/PM or 24 hours| 24 hours
Date Format| | DD/MM/YYYY MM/DD/YYYY YYYY/MM/DD YYYY‑MM‑DD Mon DD, YYYY DD‑Mon‑YYYY YYYY‑Mon‑DD| YYYY/MM/DD
Language| Message Display Language| Up to four languages| English
Temperature Unit| | °C or °F| °C
Beep ON| Beeper Status| Enabled or Disabled| Disabled
Instrument ID| Instrument Identification| 0000 to 9999| 0000
Baud Rate| Serial Communication| 600, 1200, 2400, 4800, 9600| 9600
Meter Information| Displays General Information| |

The following table lists the specific range parameters.

Replace
Custom buffer| Custom buffer setting| Max. 5 buffers| No
View calibration points| Display calibration points| Enable or disabled| Enable
Display Out of Cal. Range Warning| | Enable or disabled| Enable

GENERAL PARAMETER SCREENS Backlight

Highlight Backlight.

Press Modify.

Use keys to change the intensity then press Accept to confirm. Press ESC to leave without changing.

Contrast
Highlight Contrast.

Press Modify.

Use keys to change contrast then press Accept to confirm. Press ESC to leave without changing.

Auto Light Off
Highlight Auto Light Off.

Press 5, 10 or 30 to change settings.

Auto Power Off
Highlight Auto Power Off.

Press Modify.

Press keys to select interval then press Accept. Press ESC to leave without changing.

Date/Time
Highlight Date/Time.

Press Modify.

Use keys to select item.
Use keys to change focused values.
Press Accept to confirm new setting, or ESC to leave without changing.

Time Format
Highlight Time Format.

Press displayed functional key to change the option.

Date Format
Highlight Date Format.

Press Modify.

Use keys to select date format then press Accept. Press ESC to leave without changing.

Language
Highlight Language.

Use the desired functional key to change the option. Wait until new language is loaded. If language load fails the instrument will try to reload current language. If any language can’t be loaded, the instrument will work in safe mode. In this mode all messages are displayed in English and Help is not available.

Temperature Unit
Highlight Temperature Unit.

Press the displayed functional key in order to change the temperature unit.

Beep On
Highlight Beep On. Press the displayed functional key to enable/disable beep.

When enabled, beep sounds as a short beep every time a key is pressed or when the calibration can be confirmed. A long beep alert that the pressed key is not active or a wrong condition is detected while in calibration.

Instrument ID
Highlight Instrument ID.

Press Modify.

Use keys to change the instrument ID. Press Accept to confirm or ESC to exit without saving.

Baud Rate
Highlight Baud Rate.

Press Modify.

Use keys to select the desired communication baud. Press Accept to confirm or ESC to exit.

Meter information

Highlight Meter Information.

Press Select.

The meter informations are displayed:

• firmware version
• language version
• mV and temperature factory calibration time/date ‑battery capacity

RANGE SPECIFIC PARAMETERS SCREENS

Calibration Timeout
Highlight Calibration Timeout.

Press Modify.

Use keys to set desired value. Press Accept to confirm or ESC to return without saving.
Note: If enabled “CAL DUE” warning will be displayed, the set number of days after calibration is over passed.

First Point Mode
Highlight First Point Mode.

Press the displayed functional key in order to change the option.
If the Replace option is selected, the slopes between current buffer and nearest lower and higher buffers will be recalculated. If the Offset option is selected, an electrode offset correction is performed keeping unchanged the existing slopes.

Custom Buffers
Highlight Custom Buffers. Press Modify.

Press Delete to delete custom buffer value.

Press Add to add a new buffer to the list (max 5).

Press Modify to set custom buffer value.

Use keys to change the value. Press Accept to confirm custom buffer value or ESC to exit without saving.

View Calibration Points
Highlight View Calibration Points.

Press the displayed functional key to change option.
If option is enabled the calibration buffers corresponding to the last calibration are displayed in the pH measurement screen.

Out of Calibration Range Warning
Highlight Out of Cal.Range Warning.

Press the displayed functional key in order to change option.
If enabled, the “Out Cal Range” message will be displayed if the pH reading is outside. Approxi‑ mately 1 pH unit, from the lowest and highest pH buffer value used for calibration. For single point pH 7.01 calibration the message will be displayed for pH values less than 4 or greater than 10. This feature allows the user to log pH measurements. All logged data can be transferred to a PC through the USB port using HI92000 application. The maximum logging space is 200 (100 pH and 100 mV range) for HI98167 record locations.

LOGGING THE CURRENT DATA

To store the current reading into memory, press LOG while in measurement mode. The instrument will display for few seconds the record number and the amount of the free log space.
If the LOG space is full, the “Log space is full” message will be displayed for few seconds when LOG key is invoked. Enter View Logged Data Mode and delete records in order to free log space.

VIEW LOGGED DATA

Press RCL to retrieve the information stored while in measurement mode.

The list of records is displayed.
If no data were logged, the instrument will display “No Records!” message. Use keys to scroll between the records from the list. Press Delete All to enter Delete All screen. Press Delete to enter Delete records screen. Press More to view more information of the focused record. If More is pressed.

Use keys to scroll between complete log information. If Delete is pressed. Use key to focus the record to be deleted and then press CFM. Press ESC to exit. If Delete All is pressed the instrument asks for confirmation. Press CFM to confirm or ESC to exit without deleting. To freeze the first stable reading on the LCD press AutoEnd while the instrument is in measurement mode.

The ”Wait” symbol will blink until the reading is stable. When the reading is stable, “Hold” icon will be displayed.

Press Continue in order to enter continuous reading mode.
IMPORTANT NOTE: For factory calibration contact your local Hanna Instruments Office.
All the instruments are factory calibrated for mV and temperature. Hanna Instruments’ temperature sensors are interchangeable and no temperature calibration is needed when they are replaced. If the temperature is inaccurate, calibration should be performed. For an accurate recalibration, contact your local Hanna Instruments Office or follow the instructions below.

ENTER CALIBRATION MODE
With the instrument off, press and hold down the then power on the instrument. The calibration screen is displayed. Highlight “T” and then press Modify to enter in the temperature calibration mode.

TEMPERATURE CALIBRATION

• Prepare a vessel containing ice and water and another one containing hot water (at approximately 50 °C or 122 °F). Place insulation material around the vessels to minimize temperature changes.

• Use a calibrated thermometer with a resolution of 0.1 °C as a reference thermometer.

• Immerse the pH probe including temperature sensor into the vessel with ice and water as close as possible to the reference thermometer. Allow a few seconds for the probe to stabilize.

• Use the keys to set the calibration point value to that of ice and water mixture, measured by the reference thermometer. When the reading is stable and within range of the selected calibration point, the CFM functional key is displayed.

• Press CFM to confirm.

• The second expected calibrated point is displayed.

Immerse the pH probe including temperature sensor into the second vessel as close as possible to the reference thermometer. Allow a few seconds for the probe to stabilize.

• Use the keys to set the calibration point value to that of the hot water.

• When the reading is stable and within range of the selected calibration point, CFM functional key is displayed.

• Press CFM to confirm. The instrument returns to measurement mode.

Note: Use keys to change calibration point if necessary (±10.0 °C) around the point. If the reading is not within range of the selected calibration point, “Wrong” message will blink. Change the pH probe including temperature sensor and restart calibration.
Data transmission from the instrument to the PC can be done with the HI92000 Windows® compatible software (optional). HI92000 also offers graphing and on‑line help feature.
Data can be exported to the most popular spreadsheet programs for further analysis. To connect your instrument to a PC, use an USB cable connector. Make sure that your instrument is switched off and plug one connector to the instrument USB socket and the other to the serial or USB port of your PC. To allow our users access to the latest version of Hanna Instruments PC compatible software, we made the products available for download at http://software.hannainst.com. Select the product code and click Download Now. After download is complete, use the setup.exe file to install the software.
Note: If you are not using Hanna Instruments HI92000 software, please see the following instructions.

SENDING COMMANDS FROM PC
It is also possible to remotely control the instrument with any terminal program. Use an USB cable to connect the instrument to a PC, start the terminal program and set the communication options as follows: 8, N, 1, no flow control.

COMMAND TYPES
To send a command to the instrument follow the next scheme: