Extech Instruments ExStik PH150-C User Manual page 5

Storing Readings into Memory
1. Press the MODE/HOLD button to store a reading. The storage location number will be
displayed on the lower display, while the main display shows the stored reading. The
meter will enter the HOLD mode and the "HOLD" indicator will appear.
2. Press the MODE/HOLD button again to exit the HOLD mode and return to normal
operation.
3. If more than 25 readings are stored, previously stored readings (starting with number
1) will be overwritten.
Recalling Stored Readings
Note: Check that the HOLD symbol is not displayed. If it is, exit the HOLD function by
momentarily pressing the MODE/HOLD button.
1. Press the CAL/RECALL button and then press the MODE/HOLD button. A location
number (1 through 25) will briefly appear and then the value stored in that location will
appear. The displayed units will flash, indicating that the storage recall mode is active.
2. The last stored reading will be displayed first. Pressing and releasing the MODE/HOLD
button will scroll through the stored readings one at a time. The location number is
displayed first, followed by the reading stored in that location.
3. To exit the storage mode, press the CAL/RECALL button and the meter will return to
normal operation, after displaying "End".
CAL Reminder Display
TM
When the ExStik is turned on in the pH mode for the 15th time without recalibration, the
'CAL' icon will flash 3 times, indicating that the ExStik
applications may require recalibration of the electrode more frequently than others.
RENEW Display
A flashing 'RENEW' warning indicates that the probe may be nearing the end of its useful
life. If cleaning or recalibration does not cause the RENEW icon to disappear, replace the
electrode. The RENEW display appears when the output of the pH electrode fails a
diagnostic test.
Considerations
•
If the unit appears to be locked (display frozen) it is possible that the Data Hold mode
has been inadvertently accessed by pressing the MODE/HOLD button. Simply press
the MODE/HOLD button again or turn the meter off and restart if the display appears
frozen.
•
If the meter does latch up and no button presses revive it, remove the batteries then
reinsert the batteries.
TM
may require calibration. Some
PH150-C V2.1 07/09
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