Myron L Ultrapen PT6 Operation Manual

INTRODUCTION

Thank you for selecting the Myron L® Company Ultrapen™ PT6 Nitrate Pen. This instrument is designed to be accurate, fast, and simple to use in diverse water quality applications. Advanced features include:

• Selectable Units for Displaying Nitrate Concentration in ppm as Nitrogen (NO

-N), or Nitrate (NO

), or in millivolt (mV)

• 1 or 2 point Calibration Options with Choice of 4 Standard Solutions

• Proprietary ISE Sensor Design

• Built in Double Junction Reference Electrode, No Need for External Reference

• Compatible with EPA Approved Standard Method 4500-NO

• Live or Hold Mode – User Selectable

• Auto-Off feature – User Adjustable

• Rugged Design with Aircraft Aluminum Body

• Durable, Epoxy Encapsulated Electronics

• Waterproof

CONTENTS INCLUDE:

1. Ultrapen™ Pocket Tester Model PT6

2. User Replaceable Nitrate Sensor – Installed

3. 100 ppm NO

-N Standard Solution, 2 oz.

4. Ionic Strength Adjuster (ISA), 2 oz.

5. Graduated Cylinder with Cap, 2 ea.

6. 100 µL Pipette with Tip

7. Protective Cap

8. Pocket Clip

9. Lanyard

10. One N Type Battery – Installed

QUICK REFERENCE INSTRUCTIONS

1. Press and release the push button to turn the PT6 ON.

2. While the LED flashes rapidly: Dip the pen in prepared sample solution so the sensor is totally submerged.

3. Swirl the pen to remove any bubbles that may be trapped in the sensor.

4. While the LED flashes slowly: Hold the pen steady in the sample solution, keeping the sensor submerged.

5. In HOLD mode – Real time readings are displayed until the LED turns solid ON. The display holds the final reading briefly then the PT6 turns OFF.

6. In LIVE Mode – The PT6 will display constant, real-time measurements for up to 5 minutes then turn OFF.

ULTRAPEN FEATURES

1. PUSH BUTTON– Turns the PT6 ON, selects

instrument settings, and initiates calibration.

2. BATTERY CAP– Unscrew to access battery for

replacement.

3. BATTERY INDICATOR – Shows battery charge

level.

4. DISPLAY– Displays measurements, menu options,

battery indicator, and firmware revision (during powerup).

5. LED INDICATOR LIGHT– Indicates when to dip

the PT6 in solution, when the measurement is in progress, and when to remove the PT6 once the measurement is complete.

6. NITRATE SENSOR– Contains the double junction

reference electrode, and nitrate ion selective electrode.

7. ISE ELECTRODE – Contains the Nitrate ISE membrane.

8. THERMISTOR – Measures temperature of sample solution.

9. PROTECTIVE CAP – Protects sensor and holds solution for conditioning sensor. To remove, wiggle the cap side to side

while pulling it off.

• Use caution not to spill conditioning solution. Verify the sensor remains fully inserted into the PT6. If not, reinstall per

Nitrate Sensor Replacement Instructions (see MAINTENANCE).

• To replace, wiggle the cap side to side while pushing it on.

10. CAP STOP – Shows how far to push the protective cap when putting it on the PT6.

• DO NOT push the protective cap beyond the cap stop as sensor damage may occur.

8 9 7

Myron L® Company

– ULTRAPEN™ PT6 –

Operation Manual

Nitrate Concentration and Temperature Pen

MENU OPTIONS

The PT6 Menu allows the user to navigate through the available function/setting options. See detailed instructions below for complete instructions on each function/setting option. To get to the menu, simply press and release the push button to turn the PT6 ON, then push and hold the push button. The PT6 display will alternate between the following options:

• CAL – Calibration Menu

• FAC CAL – Factory Calibration Menu

• ºCºF TEMP – Temperature Unit Selection Menu

• ModE SEL – Mode Selection Menu

• PAr SEL – Nitrate Parameter Selection Menu

• SEnSor √ – Sensor Check Menu

• ESC – Escapes/Exits the Menu and immediately powers the PT6 OFF

Release the push button while the desired option is displayed. See detailed instructions below.

ULTRAPEN SETTINGS

NOTE: In all menus, selecting “ESC” immediately powers the PT6 OFF without saving changes to the settings.

I. NITRATE PARAMETER SELECTION

The PT6 allows you to select how you wish to display the nitrate concentration readings: Nitrate as Nitrogen (NO

-N) displayed

as ppm N, Nitrate (NO

) displayed as ppm NO3, or millivolt displayed as mV.

To select a parameter for display:

1. Press and release the push button to turn the PT6 ON.

2. Push and hold the push button to enter menu mode.

3. Release the push button while “PAr SEL” is displayed.

4. The display will alternate between “PUSHnHLD” and “PAr SEL”.

5. Push and hold the push button. The display will alternate between the following:

• “N” (displays Nitrate as Nitrogen and Temperature)

• “NO3” (displays Nitrate and Temperature)

• “mV” (displays millivolts and Temperature)

• “ESC”

6. Release the push button when desired parameter type is displayed.

• “SAVEd” will display, then the PT6 will power OFF.

II. TEMPERATURE UNIT SELECTION

The PT6 allows you to select the type of units used for displaying temperature; ˚C (Celsius) or ˚F (Fahrenheit). To select the Temperature Units:

1. Press and release the push button to turn the PT6 ON.

2. Push and hold the push button to enter menu mode.

3. Release the push button while “˚C˚F TEMP” is displayed.

4. The display will alternate between “PUSHnHLD” and “˚C˚F TEMP”.

• Push and hold the push button. The display will alternate between “˚C” (Celsius), “˚F” (Fahrenheit), and “ESC”.

5. Release the push button when desired unit is displayed.

6. “SAVEd ˚C” or “SAVEd ˚F” will display, then the PT6 will power OFF.

III. MODE SELECTION

The PT6 allows you to select between two measurement modes; Live mode or Hold mode.

HOLD mode (Default) – Real-time readings are displayed until the LED turns solid ON. The display holds the final reading briefly then the PT6 turns OFF.

LIVE mode – Real-time readings are displayed continuously for up to 5 minutes. A press and release of the push button will turn your PT6 OFF immediately. User may select auto-off timeout period from 140 to 300 seconds.

To select the mode:

1. Press and release the push button to turn the PT6 ON.

2. Push and hold the push button to enter menu mode.

3. Release the push button while “ModE SEL” is displayed.

4. The display will alternate between “ModE SEL” and “PUSHnHLD”.

5. Push and hold the push button. The display will alternate between “Hold”, “LIVE” and “ESC”.

6. Release the push button when the desired mode is displayed.

• If Hold mode is selected: “SAVEd” will display, then the PT6 will power OFF.

• If LIVE mode is selected you will be prompted to set the auto-off time: The display will alternate between “PUSH CONT”

and “[value] SEC”. Press and release repeatedly or push and hold to adjust the time out period. The display will scroll from 140 to 300 seconds, then repeat. When you have selected the desired timeout period, let the PT6 time out.

SENSOR CONDITIONING

If the sensor is new and/or has been stored dry, the sensor needs to be conditioned before calibration or measurement.

1. Remove the protective cap. Rinse the sensor with clean water (preferably DI, RO, or distilled) and pat it dry with a clean soft

lint-free cloth.

2. Fill the protective cap half-full with PREPARED calibration solution (with Nitrate ISA added, See PREPARING

CALIBRATION SOLUTION, below), carefully put the cap back on the sensor for conditioning (using caution as excess solution may squirt out). It may take up to an hour for sensor to restore stable readings after dry storage.

NOTE: For best results, you should always condition your sensor using a PREPARED calibration solution with a value close to the lower end of the concentration values you will be measuring.

CALIBRATION

The Myron L® Company recommends calibrating the PT6 before each series of tests, depending on usage. The PT6 offers 1-point or 2-Point calibration and is calibrated in Nitrate as Nitrogen (NO

-N) using 1, 10, 100, or 1000 ppm Standard Solutions. For greatest accuracy complete a 2-point calibration, selecting the closest Standard Solutions above and below your expected test solution range (example: If you are measuring test solutions in the range of 200 to 400 ppm NO

-N, then you would want to

calibrate using 100 ppm and 1000 ppm Standard Solutions). Calibration solutions must be prepared prior to use.

Calibration is always done in Nitrate as Nitrogen (NO

-N) even if your PT6 is set to measure in Nitrate (NO

). To select the

optimal Standard Solutions and to verify calibration, see the CONVERSION TABLE below.

CONVERSION TABLE

Standard Solution

Value in NO

-N

Value in NO

N1SOL

1 ppm

4.4 ppm

N10SOL

10 ppm

44 ppm

N100SOL

100 ppm

440 ppm

N1000SOL

1000 ppm

4400 ppm

NOTES

• Always start with the lower calibration point first.

• For greatest accuracy, keep the temperature of prepared calibration solution(s) the same as the test solution. The

temperature difference should be within ±2oC.

• Nitrate sensor should be conditioned prior to performing a calibration (see Sensor Conditioning, above).

I. PREPARING CALIBRATION SOLUTION

Calibration solution(s) must be prepared prior to calibration. For each standard solution selected:

1. Fill a Graduated Cylinder to the 10 mL line with the Standard Solution.

2. Add 200 µL of the Nitrate ISA solution to the Graduated Cylinder (using the supplied 100 µL pipette).

NOTE: When using the pipette to draw, depress pipette to 1st stop, then place tip in ISA solution and release slowly. To dispense, depress pipette completely to the 2nd stop. NOTE: Do not contaminate the pipette tip by touching it with your fingers or setting it in a dirty toolbox. Do not dip the pipette tip in the calibration solution as this will cause cross-contamination between solutions.

3. Replace the cap on the Graduated Cylinder and shake well to mix the prepared calibration solution.

II. 2-POINT CALIBRATION

To perform a 2-Point calibration you will need two prepared calibration solutions, clean water (preferably DI, RO, or distilled), and a clean, dry, lint-free cloth.

1. Remove the protective cap. Rinse the sensor for about 5 seconds with clean water (preferably DI, RO, or distilled) and pat it

dry with a clean soft lint-free cloth.

2. Press and release the push button to turn the PT6 ON.

3. Push and hold the push button to enter menu mode.

4. Release the button while “CAL” is displayed. The display will alternate between “PUSHnHLD” and “CAL”.

5. Push and hold the push button. The display will alternate between “1ppm”, “10ppm”, “100ppm”, “1000ppm”, and “ESC”.

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Myron L Ultrapen PT6 Operation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual