Myron L RPR - User Manual

NOTE: Please read these instructions thoroughly and carefully — Damage caused by improper installation or mishandling will void
the warranties of the instrument and the new sensor.
CAUTION: Moisture trapped in instrument will cause damage. Careful adherence to the following procedure will signicantly reduce
the potential for failure due to moisture contamination.
Enclosed with this new sensor is a new orange O-ring, and a protective foam, install per instructions in III. 8. below. While the
instrument is open, we recommend you replace the battery with a 9V alkaline type. For clarity, this procedure is broken down into
four sections. Follow each section carefully to avoid damage. Refer to drawings on reverse as necessary.
I. Preparing and Opening Instrument Case.
1. Remove pH/ORP protective cap from sensor well, shake out uid and dry sensor well thoroughly.
2. If the instrument is wet, dry it thoroughly before proceeding, paying particular attention to the bottom screw
holes. Ensure hands are clean and dry. Moisture will damage the electronics.
3. Turn instrument over and set on a clean, dry surface.
4. Using a Phillips screwdriver, remove the 4 bottom screws.
5. Open instrument carefully, on Ultrameter it may be necessary to rock the bottom case side to side to release it
from the RS-232 connector. While removing bottom case ensure sealing gasket does not stick to bottom, but stays
in top case groove. If gasket comes out, handle carefully and reinstall in top case groove.
Exercise extreme care not to allow any water to enter the open case.
II. Disconnecting and Removing Old pH/ORP Sensor.
1. Locate the cable connectors and disconnect (unscrew using a 1/4 in. open-end wrench) both cables from the
circuit board noting position of RED pH cable. Red cable is on the left. See drawing B.
2. If you are right handed, hold the instrument in your left hand with the rounded end up and locate the pH/ORP
sensor and locking tab. See drawings B & C.
3. Using your left thumb, press the locking tab away from the sensor or toward the circuit board (the tab need
only be moved approximately 1/16 in./1,5 mm).
4. While holding locking tab back, pull straight out on the cables and body of the sensor, wiggling slightly if
necessary. Once the sensor moves upwards, you may let go of the tab and pull the sensor completely out.
5. Remove any pieces of the old seal and wipe out all dirty residue from the sensor well.
6. Thoroughly inspect and clean both top and bottom case (paying special attention to the case seal and O-rings),
screw wells and screws.
III. Preparing and Installing New pH/ORP Sensor
1. Install new ORANGE O-ring in sensor well. See drawing C.
Steps 2-4 should be performed AWAY from instrument.
2. Remove tape from around new sensor and protective boot. CAUTION: Protective boot is lled with a concentrated
saline storage solution that will cause damage if allowed to come in contact with internal components.
3. Carefully remove protective boot from new sensor by lightly squeezing top half of boot and executing a slow
twisting pull. Inspect to ensure 2 O-rings are on sensor body.
4. Rinse sensor with clean water and dry thoroughly. Inspect to ensure 2 O-rings are on sensor body.
5. Align sensor with case (it will only go in one way — see drawings B & C). Ensure both O-rings on sensor slide
evenly into sensor well. CAUTION: A damaged O-ring will allow water to leak into case.
6. Press sensor into sensor well until an audible snap is heard and locking tab is in place. See drawing C.
7. Reconnect the cables in their respective places: Red cable on the left, Black on the right. Tighten securely.
8. Remove existing protective foam (light colored) from the bottom case, peel backing from new protective foam, and
install inside bottom case in same location.
IV. Closing Instrument Case
1. Align cables so that they will NOT obstruct or become pinched while reinstalling the bottom case.
2. Ensure the sealing gasket is installed in the groove of the top case.
3. Replace bottom, aligning it with the groove.
4. Install and start the 4 bottom screws.
5. Tighten screws evenly and securely. A waterproof seal cannot be ensured unless screws are secure.
Uneven tightening will cause instrument to rock.
6. Turn instrument over and ll pH/ORP sensor well with Myron L pH/ORP Sensor Storage Solution. If unavailable,
use a pH 4 Buffer or a saturated solution of table salt and tap water.
7. Reinstall protective cap on pH/ORP sensor well.
Your instrument is now ready for calibration. See Operation Manual, Pocket Card or Bottom Label for calibration instructions.
2450 Impala Drive
Carlsbad, CA 92010-7226 USA
Tel: +1-760-438-2021
Fax: +1-800-869-7668 / +1-760-931-9189
www.myronl.com
RPRI r10-17
RPR pH/ORP SENSOR REPLACEMENT INSTRUCTIONS
For Ultrameter™ 6P, 3P, Ultrameter II™ 6P, 6Psi, 6Pfc, Ultrameter III™ 9P
PoolPro™ PS6, PS6si and D-6 Digital Dialysate Meter™

Summary

Preparing and Opening Instrument Case

Prepare Sensor Well

Remove protective cap, shake out fluid, and thoroughly dry the sensor well.

Dry Instrument and Ensure Clean Hands

Thoroughly dry the instrument and ensure hands are clean and dry to prevent moisture damage.

Position Instrument for Disassembly

Turn the instrument over and place it on a clean, dry surface for the next steps.

Remove Bottom Screws

Using a Phillips screwdriver, remove the four screws located at the bottom of the instrument.

Open Instrument Case Carefully

Open the case gently, ensuring the sealing gasket stays in its groove to avoid damage.

Disconnecting and Removing Old pH;ORP Sensor

Disconnect Cable Connectors

Locate and unscrew both sensor cables from the circuit board, noting the red cable's position.

Locate Sensor Locking Tab

Hold the instrument and locate the pH/ORP sensor and its corresponding locking tab.

Release Locking Tab

Press the locking tab away from the sensor or towards the circuit board to release it.

Remove Old Sensor

Pull the sensor body and cables straight out of the well, wiggling slightly if necessary.

Clean Sensor Well

Remove any pieces of the old seal and wipe out all dirty residue from the sensor well.

Inspect and Clean Case Components

Thoroughly inspect and clean the case, sealing gasket, O-rings, and screw wells.

Preparing and Installing New pH;ORP Sensor

Install New Orange O-ring

Install the new orange O-ring into the sensor well before inserting the sensor.

Remove Sensor Protective Boot

Remove tape from the new sensor and carefully remove the protective boot filled with saline.

Rinse and Inspect New Sensor

Rinse the new sensor with clean water, dry it, and inspect for two O-rings on its body.

Align and Insert New Sensor

Align the sensor's rib with the case's guide and press it into the well until it snaps.

Reconnect Sensor Cables

Reconnect the red cable on the left and the black cable on the right securely.

Install New Protective Foam

Peel backing from new protective foam and install it inside the bottom case.

Closing Instrument Case

Align Cables and Gasket

Ensure cables are not pinched and the sealing gasket is correctly seated in the top case groove.

Replace Bottom Case

Align the bottom case with the groove of the top case and replace it.

Install and Tighten Bottom Screws

Install the four bottom screws and tighten them evenly and securely for a waterproof seal.

Fill Sensor Well

Fill the pH/ORP sensor well with Myron L Sensor Storage Solution or an alternative.

Reinstall Protective Cap

Reinstall the protective cap onto the pH/ORP sensor well.

Myron L RPR Specifications

General

Brand	Myron L
Model	RPR
Category	Accessories
Language	English