pH300 V1.0 7/09
4
Keypad Description
The meter has five (5) front panel function keys:
ON/OFF Power Key
Calibration Key:
a) When taking a measurement, press this key to enter the calibration mode
b) When in the programming mode, press this key to change the displayed
number or the ON/OFF state
Function Key
a) Press momentarily (< 1.5 seconds) to toggle between the two measurement
parameters pH and mV
b) Press and hold for at least 2 seconds to enter the P1 programming parameter.
Subsequent presses will scroll through the remaining parameters P2, P3…
Backlight and ENTER Key
a) In the measurement mode, momentary presses toggle the backlight on and off
b) When in the programming or calibration mode, press to ENTER data
MEMORY STORE and RECALL Key
a) In the measurement mode, momentary presses store the displayed readings.
Press and hold for at least 2 seconds to recall a saved reading
b) In the programming mode, press to change the displayed number or the
ON/OFF state
Store, Recall, and Clear Datalogger Memory
STORE Readings
The meter can store up to 100 pH and 100 mV readings for a total of 200 data points. To
store a reading, wait until the reading stabilizes (the smiling face icon
appears when the
reading stabilizes). Press the
M+/RM
key momentarily to store a reading. The
M+
icon
appears and the data point serial number increments.
RECALL Readings
In the measurement mode, press the
M+/RM
key to recall the most recently stored
reading.
RM
and the data point serial number for the displayed reading will appear on the
LCD. The measurement information will appear on the lower right hand side of the LCD.
Use the
CAL
or
M+/RM
buttons to scroll the remaining stored readings. Press the
ENTER
key to return to the normal measurement mode.
CLEAR Readings
From the RECALL mode, press and hold the
ENTER
key for at least five (5) seconds. The
LCD display will show ‘CLR’ indicating that all of the stored readings have been erased.
The unit will automatically return to the normal measurement mode after approximately 2
seconds.
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