Extech Instruments ExStik RE300 User manual

500

1000

RE300

ORP

User Guide

ExStikTM Model RE300

Waterproof ORP Meter

Patent Pending

RE300 V4.0 06/052

ExStikTM Description

Front Panel Controls

1. Battery compartment cap

2. LCD Display

3. MODE button

4. CAL button (unused on RE300)

5. ON/OFF button

6. Electrode collar

7. Electrode

(Electrode cap is not shown)

Display Description

1. Reading

2. Units

3. Bargraph

4. Data Hold

5. Scale

6. Low Battery

RE300 V4.0 06/053

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. 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.

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 ExStikTM will return to normal

operation.

RE300 V4.0 06/054

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. To remove an electrode, unscrew and completely remove the electrode collar (turn

the collar counter-clockwise to remove).

2. Gently rock the electrode from side to side, pulling it downwards, until it disconnects

from the meter.

3. To attach an electrode, carefully plug the electrode into the meter socket (note that

the electrode connector is keyed, ensuring proper connection).

4. 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.

RE300 V4.0 06/055

Battery Replacement

1. Twist off the battery compartment cap

2. Replace the four (4) 2032 batteries observing polarity.

3. Replace the battery compartment cap

Optional Accessories

•Replacement ORP electrode (Part Number: RE305)

Specifications

Display Multifunction LCD with Bargraph

Operating conditions 32 to 122oF (0 to 50oC) / < 80% RH

ORP Range / Accuracy ± 999mV / ± 4mV

Measurement storage 15 tagged (numbered) readings

Power Four (4) CR2032 button batteries

Low battery indication ‘BAT’ appears on the LCD

Auto power off After 10 minutes of inactivity

RE300 V4.0 06/056



Support line (781) 890-7440

Technical support: Extension 200; E-mail: [email protected]m

Repair & Returns: Extension 210; E-mail: [email protected]

Product specifications subject to change without notice

For the latest version of this User’s Guide, Software updates, and other

up-to-the-minute product information, visit our website: www.extech.com

Extech Instruments Corporation, 285 Bear Hill Rd., Waltham, MA 02451

Warranty

EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects

in parts and workmanship for one year from date of shipment (a six month limited warranty

applies to sensors and cables). If it should become necessary to return the instrument for

service during or beyond the warranty period, contact the Customer Service Department at

(781) 890-7440 ext. 210 for authorization or visit our website www.extech.com for contact

information. A Return Authorization (RA) number must be issued before any product is

returned to Extech. The sender is responsible for shipping charges, freight, insurance and

proper packaging to prevent damage in transit. This warranty does not apply to defects

resulting from action of the user such as misuse, improper wiring, operation outside of

specification, improper maintenance or repair, or unauthorized modification. Extech

specifically disclaims any implied warranties or merchantability or fitness for a specific

purpose and will not be liable for any direct, indirect, incidental or consequential damages.

Extech's total liability is limited to repair or replacement of the product. The warranty set

forth above is inclusive and no other warranty, whether written or oral, is expressed or

implied.

Calibration and Repair Services

Extech offers repair and calibration services for the products we sell. Extech also

provides NIST certification for most products. Call the Customer Service Department for

information on calibration services available for this product. Extech recommends that

annual calibrations be performed to verify meter performance and accuracy.

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