8
8
8
8
8
N o te
N o te
N o te
N o te
N o te: When in MTC the user can press and hold the arrow keys, and the instument will start
incrementing/ decrementing the temperature value. The meter keeps measuring and
the display is updated every second.
O RP MEASUREMEN TS (M
O RP MEASUREMEN TS (M
O RP MEASUREMEN TS (M
O RP MEASUREMEN TS (M
O RP MEASUREMEN TS (Mi 151 only
i 151 only
i 151 only
i 151 only
i 151 only)))))
To perform ORP measurements, connect an optional ORP electrode (see "Accessories" section for
code) to the instrument and turn it ON.
If necessary, enter the mV mode by pressing the RANGE key until the display changes
to mV.
Submerge the ORP electrode tip (4 cm/ 1½") into the sample to be tested and wait a few
minutes for the reading to stabilize.
Measurements within the ± 699.9 mV range are displayed with 0.1 mV resolution, while
outside this range the resolution automatically switches to 1 mV.
The LCD will show the measured mV value on the primary LCD and the temperature of the
sample on the secondary LCD.
The “ATC” (or “MTC”) tag is turned off because mV readings are not temperature
compensated.
For accurate ORP measurements, the surface of the electrode must be clean and smooth.
Pretreatment solutions are available to condition the electrode and improve its response time
(see "Accessories" section).
N o tes
N o tes
N o tes
N o tes
N o tes:
• When the reading is out of range, the display will flash the closest full-scale value.
• If using pH electrode while in mV mode, the instrument will measure the mV generated by the
pH electrode.
Instruction Manual Mi 150 & Mi 151 Bench Meters
