Operation; Getting Started; Orp Testing; Data Hold - Extech Instruments ExStik RE300 User Manual

Operation

Getting Started

Battery Activation: An insulating tab is located in the battery compartment and prevents
battery drain during storage. It must be removed before use.
White KCL crystals may be present in the cap. These crystals will dissolve in the soak or
they can be simply rinsed with tap water
When the RE300 is turned on, it enters the Automatic Calibration mode. 'SELF' and 'CAL'
will appear on the LCD while calibration is in progress. After the calibration is complete,
'SELF' and 'CAL' will extinguish and both the main display and bargraph will read ORP in
mV units. The bargraph reads 0mV (far left), 500mV (center), and 1000mV (far right).

ORP Testing

1. Remove cap from the electrode and press the ON/OFF button to switch the RE300
on.
2. Dip the electrode1/2" to 1" into the test solution. Stir once and let the reading stabilize
for 1 to 3 minutes.
3. Note the ORP or press MODE to freeze the reading The HOLD display icon will
appear along with the held reading. The held reading will be stored in the next 15-
reading storage location (see below). Press the MODE key to return to normal
operation.
4. Press the ON/OFF button to turn the RE300 off. If you do not press a button for 10
minutes the RE300 shuts off automatically.

Data Hold

Press the MODE button to freeze the current reading. The HOLD display icon will appear
along with the held reading. The held reading will be stored in the next 15-reading storage
location (see below). Press the MODE key to return to normal operation.

15-Reading Measurement Storage

1. Press the MODE button to store a reading. The LCD will briefly display the memory
location number and then the value stored (Data Hold will activate).
2. Press MODE again to return to normal
operation. Repeat step 1 above to store
the next reading and so on.
3. If an attempt is made to store more than
15 readings, the stored readings (starting
with the first reading) will be overwritten.

Recalling Stored Readings

Note: First ensure that the HOLD symbol is not displayed. If it is, exit the HOLD function by
pressing the MODE button.
1. Press the CAL button once and then press the MODE button immediately after CAL is
displayed; the location number (1 through 15) will flash. If the CAL mode is
accidentally accessed (display flashing), press the CAL button again to exit.
2. The last stored reading taken will be displayed first. To advance through the stored
readings, press the MODE button. The location number is displayed first, followed by
the reading stored in that location.
3. To exit the storage mode, press the CAL button and the ExStik
operation.
ExStik
TM
3
TM
will return to normal
RE300-EU_ENG V2.2 02/08