Hanna Instruments HI 98230 - Manual (Page 4)

7 6
INITIAL PREPARATION
Each meter is supplied complete with batteries. Remove the back
cover, unwrap the batteries and install them while paying attention
to the polarity. Alternatively, connect the supplied 12 Vdc adapter to
the power adapter plug.
To prepare the instrument for use, connect the pH or ORP (HI 98240
only) electrode to the connector located on the top of the instrument.
To switch the meter on, press the ON/OFF key.
The batteries charge status or "LINE" message
(if external power adapter is connected) will be
displayed on the LCD for a few seconds.
The meter is now ready to operate.
To maximize battery life, the meter is automatically switched off after a
user selectable period of non-use (default is 5 minutes). If in logging
mode, after the period of non-use, the meter will continue to monitor
pH or mV (HI 98240 only) and temperature periodically at the end of
every logging interval. Only the "LOG" indication will be visible on
LCD. While storing data in memory, during the sleep mode, the
reading will appear briefly on the LCD.
Before proceeding with pH measurements follow the calibration proce-
dure.
Note: When the use of an alternate function (FNC, CFM and CAL) is
requested, press and hold the ALT key first and then the
second listed key.
Note: To prevent damage to the electrode, remove the pH electrode
from the sample before turning the meter off.
If the meter is OFF, detach the electrode from the meter before
immersing the electrode in the storage solution.
ON/OFF
SPECIFICATIONS
Range -4.00 to 19.99 pH
±400.0 mV / ±2000 mV autoranging (HI 98240 only)
-10.0 to 120.0°C / 14.0 to 248.0°F
Resolution 0.01 pH
0.1 mV (±400 mV) / 1 mV (outside) (HI 98240 only)
0.1°C / 0.1°F
Accuracy (@20°C/68°F) ±0.01 pH
±0.5 mV (±400 mV) / ±2 mV (outside) (HI 98240 only)
±0.5 °C (0 to 70°C) / ±1°C (outside)
±1°F (32 to 158°F) / ±1.8°F (outside)
Typical EMC Deviation ±0.03 pH
±1 mV (±400 mV) / ±2 mV (outside) (HI 98240 only)
±0.8°C / ±1.4°F
pH Calibration Automatic, 1 or 2 point with 5 memorized buffer values
(pH 4.01, 6.86, 7.01, 9.18 and 10.01)
mV Calibration Automatic, 2 point at 0 and 350 mV or
(HI 98240 only) 3 point at 0, 350 and 1900 mV
Temperature Compensation
Automatic, -10 to 120°C (14 to 248°F)
pH Electrode HI 1618D smart electrode
with built-in temperature, DIN connector and 1 m (3.3') cable (included)
ORP Electrode Samrt ORP electrode with
(HI 98240 only) DIN connector and 1 m (3.3') cable (optional)
Input Impedance 10 12 Ohm
PC Connection HI 9200 IR interface
Printer Low power impact type-belt, 14 characters per line;
38 mm plain paper (HI 710034)
Printing/Logging Interval
Selectable at 1, 2, 5, 10, 15, 30, 60, 120 or 180 minutes
Power supply 4 x 1.5V AA batteries / approx. 350 of use
(without printing and backlight)
or 12 Vdc input
Environment 0 to 50°C (32 to 122°F); RH max 95%
Dimensions 220 x 87 x 75 mm (8.7 x 3.4 x 2.9")
Weight 550 g (1.2 lb.)