Operation
Getting Started
White KCL crystals may be present on the electrode. 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.
2.
3.
Remove cap from the electrode and press the ON/OFF button to switch the RE300
on.
Dip the electrode1/2” to 1” into the test solution. Stir once and let the reading stabilize
for 1 to 3 minutes.
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.
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.
4.
15-Reading Measurement Storage
1.
2.
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).
Press MODE again to return to normal
operation. Repeat step 1 above to store
the next reading and so on.
If an attempt is made to store more than
15 readings, the stored readings
(starting with the first reading) will be
overwritten.
3.
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.
TM
3. To exit the storage mode, press the CAL button and the ExStik will return to normal
operation.
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RE300 V4.0 06/05
Measurement and Display 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 button. Simply press the
MODE 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 and
restart.
Note that if the batteries are removed, any stored readings will be discarded. Factory
calibration data for all models will be retained, however.
•
•
Replacing the Electrode
To preserve Electrode life keep the sponge in the protective cap soaked
with tap water when not in use (store vertically).
DO NOT USE DE-IONIZED WATER.
1.
2.
3.
4.
To remove an electrode, unscrew and completely remove the electrode collar (turn
the collar counter-clockwise to remove).
Gently rock the electrode from side to side, pulling it downwards, until it disconnects
from the meter.
To attach an electrode, carefully plug the electrode into the meter socket (note that
the electrode connector is keyed, ensuring proper connection).
Tighten the electrode collar firmly enough to make a good seal (a rubber gasket seals
the electrode with the meter).
Powering the ExStik™
The ExStikTM uses four (4) CR2032 batteries (included).. If the batteries are weak, the
‘BAT’ indicator appears on the LCD. Press the ON/OFF key to turn the ExStikTM on or off.
The auto power off feature shuts the ExStikTM off automatically after 10 minutes of
inactivity to preserve battery life.
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RE300 V4.0 06/05
Battery Replacement
1.
2.
3.
Twist off the battery compartment cap
Replace the four (4) 2032 batteries observing polarity.
Replace the battery compartment cap
Optional Accessories
•
Replacement ORP electrode (Part Number: RE305)
Specifications
Display
Operating conditions
ORP Range / Accuracy
Measurement storage
Power
Low battery indication
Auto power off
Multifunction LCD with Bargraph
32 to 122 F (0 to 50 C) / < 80% RH
± 999mV / ± 4mV
15 tagged (numbered) readings
Four (4) CR2032 button batteries
‘BAT’ appears on the LCD
After 10 minutes of inactivity
o
o
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RE300 V4.0 06/05
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