Hanna Instruments HI 250 - Manual (Page 9)

9
RELATIVE mV MEASUREMENTS (HI 251 only)
• Press RANGE until “rEL” message will be displayed on the secondary LCD
line for about one second and “mV” tag will blink. After one second the
temperature will be displayed on the secondary LCD.
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.
TEMPERATURE MEASUREMENTS
Connect the HI 7669/2Wtemperature probe to the appropriate
socket and turn the instrument on.
Immerse the temperatureprobeinto the sample and allow
the reading on the secondary LCD to stabilize.
mV
C