Model PH220 Version 3.1 11/2005
6
Storing and Recalling Readings
This instrument has the ability to store up to 25 measurement readings. At a later time the
readings can be recalled and viewed. Readings are saved even after the instrument has
been turned off.
STORE Readings
The steps below cover the
STORE
process in detail:
1.
Take a measurement as described earlier in this manual.
2.
Momentarily press the
STORE/RECALL
button to save the reading. The reading will
be held on the display (the HOLD and STORE icons will appear). In addition, the
storage location (1 to 25) will briefly appear on the lower portion of the LCD.
3.
Note: The temperature reading associated with the pH reading is also saved.
4. Press
the
STORE/RECALL
button again to release the ‘hold’ feature. The instrument
will then return to normal operation.
5.
Note that when all 25 storage locations are filled the instrument begins writing over
the previously stored data.
RECALL Readings
The steps below cover the
RECALL
process in detail:
1.
Press and hold the
STORE/RECALL
button until a number appears on the main
display. This number is the storage location for the most recent reading.
2.
The number will switch off after 1 second and the stored reading will appear. The
RECALL icon will appear and remain on the entire time the recall mode is accessed.
3.
While in the RECALL mode, use the
STORE/RECALL
button to scroll through the
stored readings. The most recent readings will show first (LAST IN – FIRST OUT).
4.
Press and hold the
STORE/RECALL
button until the END display appears. Release
the button and the instrument will return to normal operation mode.
5.
Note that if there are no readings in memory, the display will show END when the
user attempts to access the RECALL mode.
ERASE Readings
The steps below cover the
ERASE
(CLEAR) process in detail:
1.
Press and hold
STORE/RECALL
and the
CAL
buttons simultaneously for 4 seconds.
2.
The ‘CLr’ display will appear indicating that all readings have been erased.
3.
Release the buttons to return to normal operation mode.
Temperature Offset Adjustment
Applications may arise where it is desirable to offset the instrument’s temperature display.
This instrument allows a temperature display offset adjustment of ±9
o
F (±5
o
C). To do so,
follow the steps below:
1.
Press and hold the
CAL
,
MODE
, and
STORE/RECALL
buttons simultaneously for 6
seconds.
2.
The main display will indicate the current offset. The lower display will show ‘t_O’.
3. Use
the
CAL
button to decrease the offset value and the
MODE
button to increase it.
4.
Press and hold the
STORE/RECALL
button for 2 seconds to exit this mode. The
instrument will display ‘SA’ (save) and ‘END’ before returning to the normal operation
mode.
5.
The temperature display will now indicate the actual temperature ± the offset value.
