Hanna Instruments HI 255 User Manual
Page 9
9
The instrument displays the mV reading on the primary LCD and the
temperature on the secondary LCD line.
If the reading is out of range, the closest full-scale value will be displayed
blinking on the primary LCD.
RELATIVE mV MEASUREMENTS
Press the ALT&MODE keys simultaneously while in mV range. The rEL
message will be displayed on the secondary LCD line for about one second and
the mV tag will blink. After one second the temperature will be displayed on
the secondary LCD line.
The reading displayed by the instrument is equal to the difference between
the current mV input value and relative mV offset established in the relative
mV calibration.
CONDUCTIVITY MEASUREMENTS
Connect the conductivity probe to the instrument.
Press RANGE to enter conductivity measurement range (EC).
Immerse the probe into the solution to be tested. The sleeve
holes must be completely submerged. Tap the probe repeatedly to
remove any air bubbles that may be trapped inside the sleeve.
The conductivity value will be displayed on the primary LCD and the
temperature on the secondary LCD line.
If the reading is out of range, the full-scale value (200.0 for Mtc/Atc mode
or 500.0 for actual conductivity) will be displayed blinking.
mV
mV
mV