Hanna Instruments HI 8521 - Manual (Page 16)

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• When the temperature is set manually,
"°C" symbol blinks. With the tempera-
ture probe connected, the "°C" symbol
is displayed continuously.
• Use the UP or DOWN arrow keys to
manually adjust the display reading
to the value of the reference ther-
mometer.
TAKING TEMPERATURE MEASUREMENTS (NOT FOR HI
8519)
• Taking a temperature measurement is very easy.
• Turn the instrument ON and press the RANGE key
(for HI8520 and HI8521 only) to get into tem-
perature mode.
• Make sure the temperature probe is connected
and allow the reading to stabilize (1 or 2 min-
utes).
• The temperature value will be dis-
played on the left LCD for HI8417.
TAKING ORP MEASUREMENTS
HI8417, HI8519 and HI8521 have the capability to take ORP
measurements, using an ORP electrode. Hanna Instruments offers a
variety of ORP electrodes for this purpose (see page 35). Contact your
Dealer for more information.
Just as pH measurements allow the acidity or the alkalinity of a
substance to be expressed in numbers, oxidation-reduction potential
(redox) measurements provide the quantification of the oxidizing or
reducing power of any liquid.
For HI8519 only:
• Connect the ORP electrode to the meter and
submerge the tip (4 cm / 1½") into the sample
to be tested.
Note: ORP measurements are taken without tem-
perature compensation.
• Press the mV key to enter the mV mode. Allow a few
minutes for the reading to stabilize.
• The display will indicate the absolute
mV value (positive or negative).
°C °C
RANGE
°C pH
4 cm (1½
")
mV mV
mV
ºC