User Guide

19
ORP MEASUREMENTS (HI9625 & HI 96250)
HI 9625 and HI96250 have the capability to
take ORP measurements. An optional ORP
electrode must be used to perform these
measurements.
Secure the connection of the ORP electrode
to the BNC socket located on the top of the
meter.
If possible, use plastic beakers to minimize
any EMC interferences.
To get into the "mV" mode (ORP or ISE)
press the RANGE key until the display
changes to mV.
To measure the mV of a solu-
tion simply submerge the ORP
or ISE electrode tip (4cm/1½")
into the sample to be tested.
Allow a few minutes for the
readings to stabilize.
Oxidation-reduction potential (REDOX) mea-
surements provide the quantification of the
oxidizing or reducing power of the sample
tested.
To correctly perform a redox measurement,
the surface of the ORP electrode must be
clean and smooth.
When not in use, the tip of the electrode
should be kept moist and safe from any me-
chanical stress which might cause damage
to the glass/platinum junction.
RANGE
mV
°C
4 cm
(1½
")