49
mV/ORP
mV/ORP
mV/ORP
mV/ORP
mV/ORP MEASUREMENTS
MEASUREMENTS
MEASUREMENTS
MEASUREMENTS
MEASUREMENTS
Oxidation-reduction potential (ORP) measurements provide the quantification of the oxidizing or reducing power of the
tested sample.
To correctly perform a redox measurement, the surface of the ORP electrode must be clean and smooth.
DIRECT MEASUREMENT
To measure the mV of a sample using the Direct reading mode:
• Press
and then
to enter
mV Measure mode.
• Select the Direct reading mode (see
mV Setup for details).
• Submerge the tip of the ORP electrode (4 cm/1½”) into the
sample to be tested and allow a few seconds for the reading
to stabilize.
• The instrument will display the measured mV value on the LCD.
Note
: If the reading is out of range, “-----” will be displayed
on the LCD.
DIRECT/AUTOHOLD MEASUREMENT
To measure mV of a sample using the Direct/AutoHold reading mode:
• Press
and then
to select
mV Measure mode.
• Select the Direct/AutoHold reading mode (see
mV Setup for
details).
• Submerge the tip of the ORP electrode approximately 4 cm
(1½”) into the sample to be tested and allow a few
seconds for the reading to stabilize.
• The measured mV value will be displayed on the LCD. If
pressing
, the “AutoHold” indicator will start blinking
on the LCD until the stability criterion is reached. The mV value
will be frozen on the LCD, along with “AutoHold” indicator.
• To return to normal
Measure mode press
.
Note
: If the reading is out of range, “-----” will be displayed
on the LCD.
mV & Relative mV MEASURE
mV & Relative mV MEASURE
mV & Relative mV MEASURE
mV & Relative mV MEASURE
mV & Relative mV MEASUREMENT
MENT
MENT
MENT
MENT SSSSS
68
Temperature Compensation
The user can choose from the following options:
Linear - the meter will compensate automatically the conductivity using the following formula:
where:
C
ref
- conductivity at reference temperature
- compensation coefficient
T
- temperature
ref
- reference temperature
Non-Linear - recommended for measuring the conductivity of the natural water in accordance with the compensation
table on the next page.
Disabled - the meter will display the conductivity with no temperature compensation.
To set the
temperature compensation mode:
• Use
or
to highlight the
Temperature Com-
pensation option.
• Press
and then use
or
to select
Linear, Non-Linear or Disabled option.
• Press
to confirm your selection or press
to cancel
operation.
Whatever form of compensation is used, the reading will not be as accurate as taking a reading of the sample’s
conductivity at the reference temperature.