Hanna Instruments HI 991000 User manual

SPECIFICATIONS
Range pH 0.00÷14.00
Temperature 0.0÷60.0°C or 32.0÷140.0°F
Resolution pH 0.01pH
Temperature 0.1°C or 0.1°F
Accuracy pH ±0.01pH
(@20°C/68°F)Temperature ±0.5°C or ±1°F
Typical EMC pH ±0.3pH
Deviation Temperature ±1°C or ±1°F
Temperature Automatic
Compensation
pH Calibration 1 or 2 point with auto-buffer recognition
pH 4.01/7.01/10.01 or pH 4.01/6.86/9.18
Probe HI 1291 pH/temperature probe (included)
Battery Type/Life 4 x 1.5V AAA with BEPS / 500 hours
Environment 0 to 50°C (32 to 122°F); RH 100%
Dimensions 143x80x38mm (5.6x3.2x1.5”)
HI 991000 Instruction Manual
Portable pH Meter
ppm ppt µS pH
!
ATC
%
CAL
- +
°C
°F
Primary
display
Secondary
display
Selectable
temperature
unit
Stabilty
indicator
Battery
percentage
Low battery
indicator
PRINTEDINPORTUGAL IS991000R1 05/99
http://www.hannainst.com
Battery replacement
The meter displays the remaining percentage when turned
on. When the battery level is below 5%, the
- +
symbol on
the bottom left of the LCD lights up to indicate a low battery
condition. If the battery level is low enough to cause
erroneous readings, the Battery Error Prevention System
(BEPS) turns the HI991000 off.
To ensure a watertight seal, the batteries are accessed by
separating the front and back halves of the meter. The
4 Philips-head screws are located on the 4 corners of the
back of the meter. Once the back has been removed,
carefully replace the 4 AAA batteries located in the battery
compartment, paying attention to their polarity. Re-attach
the back, making sure that the gasket is in place.
Calibration solutions
HI 77400P pH 4.01 & 7.01 (20 mL, 5 pcs each)
HI 770710P pH 7.01 & 10.01 (20 mL, 5 pcs each)
HI 70004P pH 4.01 calibration solution (20 mL, 25 pcs)
HI 70006P pH 6.86 calibration solution (20 mL, 25 pcs)
HI 70007P pH 7.01 calibration solution (20 mL, 25 pcs)
HI 70009P pH 9.18 calibration solution (20 mL, 25 pcs)
HI 70010P pH 10.01 calibration solution (20 mL, 25 pcs)
Other accessories
HI 710007 Protective rubber boot
HI991000 is in compliance with the CE directives
EN 50081-1 and 50082-1

OPERATIONAL GUIDE
To connect the probe
Connect the HI 1291 probe to the DIN socket on the top of
the HI991000 by aligning the pins and pushing in the plug.
Tighten the nut to ensure a good connection. Remove the
protective cap from the HI1291 probe before taking any
measurements.
To turn HI991000 on and to check battery status
Press the ON/OFF/MODE button for 2 seconds. All the used
segments on the LCD will be visible for a few seconds,
followed by a percent indication of the remaining battery
life. Eg. % 100 BATT.
To turn HI991000 off
Press the ON/OFF/MODE button from normal measuring
mode. OFF will appear on the bottom display.
To freeze the display
Press the SET/HOLD button for 2 seconds until HOLD
appears on the bottom display. Eg. pH 5.73 hold.
Press any button to return to normal mode.
pH MEASUREMENTS & CALIBRATION
• Make sure the meter has been calibrated.
• Iftheelectrodehasbeenleftdry,soakinpH7toreactivate.
• Place the tip of the probe in the sample to be tested.
• Shake the probe briefly while submerged and wait until
the !symbol on the top left of the LCD is turned off.
• The LCD will show the pH value automatically
compensated for temperature and the temperature of the
sample.
• If measurements are taken in different samples
successively, rinse the probe tip thoroughly to eliminate
cross-contamination; and after cleaning, rinse the probe
tip with some of the sample to be measured.
Calibration buffer set
• Press the ON/OFF/MODE button for 6 seconds, until CAL
on the bottom display is replaced by TEMP and the current
temperature unit. Eg. TEMP °C.
• PresstheON/OFF/HOLDbutton again to show the current
buffer set: pH 7.01BUFF(for 4.01/7.01/10.01) or pH 6.86BUFF
(for 4.01/6.86/9.18).
• Press the SET/HOLD button for changing the buffer set.
• Press the ON/OFF/MODE button to return to normal pH
measuring mode.
pH calibration
• Press and hold the ON/OFF/MODE button for 3 seconds,
until OFF on the bottom display is replaced by CAL.
• Release the button. The LCD will display pH 7.01 USE or
pH 6.86 USE (if you selected the NIST buffer set).
• For a single point pH calibration, place the probe in any
buffer from the selected buffer set (eg. pH 7.01 or pH 4.01
or pH 10.01). The meter will recognize the buffer value
and will display OK for 1 second.
If the pH 7.01 buffer (or 6.86 if you selected the NIST
buffer set) was used, press the ON/OFF/MODE button to
return to the pH measuring mode.
• For a two point pH calibration, place the probe in pH 7.01
(or 6.86, if you selected the NIST buffer set). The LCD will
display the recognized buffer value and OK for 1 second
and then display pH 4.01 USE.
Place the probe in the second buffer value (pH 4.01 or
10.01,or, if using NIST,pH4.01or9.18).Whenthesecond
buffer is recognized, the LCD will display OK for 1 second
and the meter will return to normal measuring mode.
TO CHANGE THE TEMPERATURE UNIT (FROM °C TO °F)
Press the ON/OFF/MODE button for 6 seconds, until CAL on
the bottom display is replaced by TEMP and the current
temperature unit. Eg. TEMP °C.
Use the SET/HOLD button to change the temperature unit,
and then press ON/OFF/MODE until the meter returns to
normal measuring mode.
To reset to the default calibration
To clear a previous calibration, press the ON/OFF/MODE
button after entering the calibration mode. The bottom LCD
will display ESC for 1 second and the meter will return to
normal measuring mode. The “CAL” symbol on the LCD
will disappear. The meter will be reset to the default
calibration.