Sper Scientific 800021 RH/Temp SD Card Logger User Manual

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Hold Function

1. When measuring any parameter,

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.

Maximum and Minimum

To record maximum and minimum
readings:

1. When measuring any parameter,

press REC to begin recording the
maximum and minimum values.
“REC” appears on the LCD.

2. Press REC. The maximum value

and “REC MAX” will appear on
the LCD.

MEASUREMENT

PROCEDURES