Sper Scientific 850061 pH SD Card Datalogger Kit - Manual (Page 28)

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measurement function, which allows
for ion-selective, ORP (oxidation-
reduction potential) and other precise
mV measurements.
1. Press POWER to turn the meter
on.
2. Press FUNCTION. “mV” appears
on the LCD.
3. Using an ORP probe, plug the
probe plug into the pH probe
socket.
4. The mV value appears on the
LCD.
Hold Function
1. Press HOLD to freeze the reading
on the display. “HOLD” will
appear on the LCD.
2. Press HOLD again to release the
hold function. “HOLD” will
disappear from the LCD.
MEASUREMENT
PROCEDURES