User Guide

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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 ±0.03pH

Deviation Temperature ±0.5°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

IS991000R2 11/00

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 errone-

ous readings, the Battery Error Prevention System (BEPS)

turns the HI 991000 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, care-

fully replace the 4 AAA batteries located in the battery com-

partment, 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, EN 50082-1 and EN 61010-1.

Summary of content (2 pages)

PAGE 1
Battery replacement HI 991000 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 HI 991000 off. Portable pH Meter To ensure a watertight seal, the batteries are accessed by separating the front and back halves of the meter.
PAGE 2
OPERATIONAL GUIDE • Press the SET/HOLD button for changing the buffer set. To connect the probe • Press the ON/OFF/MODE button to return to normal pH measuring mode. Connect the HI 1291 probe to the DIN socket on the top of the HI 991000 by aligning the pins and pushing in the plug. Tighten the nut to ensure a good connection. Remove the protective cap from the HI 1291 probe before taking any measurements. To turn HI 991000 on and to check battery status Press the ON/OFF/MODE button for 2 seconds.