Hanna Instruments HI 98140 - Manual (Page 4)

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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 98150
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 5
minutes of non-use (this feature is enabled by default and can be
disabled through setup code 20). To reactivate the instrument press
the ON/OFF key.
Before proceeding with pH measurements follow the calibration proce-
dure.
Note: When the use of an alternate function (DEL, FNC, CFM, GLP,
RCL and CALT) is requested, press and hold the ALT key first
and then the second listed key.
Note: to prevent damage to the electrode, remove it from the sample
before turning the meter off.
If the meter is OFF, detach the electrode from the meter before
immersing it in the storage solution.
ON/OFF
SPECIFICATIONS
Range -4.00 to 19.99 pH / -20 to 120.0°C
HI 98150 only: ±600.0 mV; ±2000 mV
Resolution 0.01 pH
0.1°C (-10 to 120°C) / 1°C (below -10°C)
HI 98150 only: 0.1 mV (±400 mV) /
0.2 mV (±400 to ±600 mV) / 1 mV (outside)
Accuracy (@20°C/68°F) ±0.01 pH
±0.4 °C from 0 to 70°C / ±1°C outside
HI 98150 only: ±0.2 mV (±400 mV) /
±0.4 mV (±400 to ±600 mV) / ±2 mV (outside)
Typical EMC Deviation ±0.02 pH / ±0.4°C
HI 98150 only: ±1 mV (±600 mV) / ±2 mV (outside)
pH Calibration Automatic, 1 or 2 point with 5 memorized buffers
(pH 4.01, 6.86, 7.01, 9.18 and 10.01)
mV Calibration Automatic, 2 point at 0 and 350 mV or
(HI98150 only) 3 point at 0, 350 and 1900 mV
Temperature Compensation
Automatic, -20 to 120°C (-4 to 248°F)
pH Electrode HI 1618D smart electrode with built-in temperature
sensor, DIN connector and 1 m (3.3') cable (included)
ORP Electrode Smart ORP electrode with DIN connector
(HI98150 only; see accessories)
Input Impedance 10 12 Ohm
PC Connection Through RS232 serial port,
using HI 920011 connection cable & HI 92000 software
Power Supply 4 x 1.5V AA batteries / approx. 300 hours of use
(with backlight off) or 12 Vdc input
Casing IP 67
Environment 0 to 50°C (32 to 122°F); RH max 100%
Dimensions 196 x 80 x 60 mm (7.7 x 3.1 x 2.4")
Weight 500 g (1.1 lb.)