YSI 60 User Manual

YSI Model 60

Handheld pH and Temperature System

Operations Manual

Table of Contents

1. Introduction ............................................................................................................... 1

2. Preparing the Meter................................................................................................... 2

2.1 Unpacking............................................................................................................................2

2.2 Warranty Card......................................................................................................................2

2.3 Batteries ...............................................................................................................................2

2.4 Transport Chamber ..............................................................................................................3

2.5 Hand Strap ...........................................................................................................................3

2.6 The Meter Case....................................................................................................................3

2.7 Calibration Vessels ..............................................................................................................3

3. Preparing the Probe.................................................................................................. 4

3.1 Installing the Sensor.............................................................................................................4

4. Operation...................................................................................................................5

4.1 Turning The Instrument On .................................................................................................6

4.2 Calibration ...........................................................................................................................6

4.3 Making Measurements.......................................................................................................11

4.4 Saving Data........................................................................................................................11

4.5 Recalling Stored Data ........................................................................................................12

4.6 Erasing Stored Data ...........................................................................................................13

4.7 Display Backlight ..............................................................................................................13

5. Maintenance of the pH Sensor............................................................................... 14

5.1 pH Sensor Precautions .......................................................................................................14

5.2 pH Sensor Cleaning ...........................................................................................................14

5.3 pH Sensor Storage .............................................................................................................15

6. Discussion of Measurement Errors....................................................................... 16

7. Troubleshooting...................................................................................................... 17

8. Principles of Operation........................................................................................... 19

8.1 pH.......................................................................................................................................19

8.2 Temperature .......................................................................................................................20

9. Warranty and Repair............................................................................................... 21

9.1 Cleaning Instructions .........................................................................................................22

9.2 Packing Instructions...........................................................................................................23

10. Required Notice.....................................................................................................24

11. Accessories and Replacement Parts................................................................... 25

12. Appendix A - Specifications................................................................................. 26

13. Appendix B - Health and Safety........................................................................... 27

14. Appendix C - pH Buffer Values ............................................................................ 28

1. Introduction

The YSI Model 60 Handheld pH/Temperature System is a rugged, micro-processor based, digital meter with an attached pH and temperature probe. The pH sensor can be easily replaced in the field.

The Model 60 has a non-detachable cable available in lengths of 10, 25, 50 or 100 feet (3, 7.6,

15.2 or 30.5 meters). The probe body has been manufactured with stainless steel to add rugged durability and sinking weight.

The YSI Model 60 has the following features:

• Capability to measure at depths of up to 100 feet (30.5 meters)

• Microprocessor control

• Field replaceable low maintenance pH sensor

• Push-button calibration

• Simultaneous display of pH and temperature

• Automatic temperature compensation

• Data storage for 50 sets of readings with on screen recall

• Waterproof case (IP65)

The Model 60’s micro-processor allows the system to be easily calibrated with the press of a few keys. Additionally, the micro-processor performs a self-diagnostic routine each time the instrument is turned on. The self-diagnostic routine provides useful information about the function of the instrument and probe.

A transport chamber, built into the instrument case, provides a convenient place to store the probe when transporting the system. The Model 60 case is waterproof (rated to IP65) allowing operation in the rain without damage to the instrument.

The Model 60 is powered by six AA-size alkaline batteries. A new set of alkaline batteries will provide approximately 100 hours of continuous operation. When batteries need to be replaced, the LCD will display a “LO BAT” message.

The YSI Model 60 is designed for use in environmental, aquaculture, and industrial applications where accurate pH and temperature measurements are desired.

2. Preparing the Meter

2.1 Unpacking

When you unpack your new YSI Model 60 Handheld pH and Temperature System for the first time, check the packing list to make sure you have received everything you should have. If there is anything missing or damaged, call the dealer from whom you purchased the system. If you do not know which of our authorized dealers sold the system to you, call YSI Customer Service at 800-765-4974 or 937-767-7241, and we'll be happy to help you.

2.2 Warranty Card

Please complete the Warranty Card and return it to YSI. This will record your purchase of this instrument in our computer system. Once your purchase is recorded, you will receive prompt, efficient service in the event any part of your YSI Model 60 should ever need repair.

2.3 Batteries

There are a few things you must do to prepare your YSI Model 60 for use. First, locate the six AA-size alkaline batteries and the battery cover kit which were included. Then locate the markings inside each of the two battery-chamber sleeves that illustrate the correct way to install the batteries. Install the batteries are shown.

NOTE: It is very important that the batteries be installed ONLY as illustrated. The instrument will not function and may be damaged if the batteries are installed incorrectly.

Hand strap

Battery chamber cover

Thumb screw

Attach the battery chamber cover to bottom of the instrument using the thumb screw as shown in Figure 1. Make sure that the o-rings are in place. The battery-chamber cover is marked with the words "OPEN" and "CLOSE."

Turn the instrument on by pressing and releasing the ON/OFF key on the front of the instrument. The liquid crystal display (LCD) should come on. Allow a few seconds for the instrument to complete its diagnostic routine. If the instrument does not operate, consult the chapter entitled Troubleshooting.

Polarity marking

O-rings

Figure 1

You may also want to take the instrument into a dark location and, with the instrument ON, hold down the LIGHT key. The instrument back-light should illuminate the LCD so that the display can be easily read.

2.4 Transport Chamber

The Model 60 has a convenient transport chamber built into the instrument’s side. This chamber provides a storage area and protection for the pH sensor while transporting the system in the field. Insert the round sponge (provided with the Model 60) into the bottom of the chamber. Put 6-8 drops of tap water into the sponge. The wet sponge creates a humid environment for the pH sensor to prevent it from drying out during transport in the field (up to one week). The transport chamber is NOT intended for long term storage of the pH sensor. See 5.3 pH Sensor Storage.

Probe transport chamber

Figure 2

2.5 Hand Strap

The hand strap (see Figure 1 on previous page) is designed to allow comfortable operation of the Model 60 with minimum effort. If the hand strap is adjusted correctly, it is unlikely that the instrument will be easily dropped or bumped from your hand.

To adjust the hand strap on the back of the meter, unsnap the vinyl cover and pull the two Velcro strips apart. Place your hand between the meter and the strap and adjust the strap length so that your hand is snugly held in place. Press the two Velcro strips back together and snap the vinyl cover back into place.

2.6 The Meter Case

The meter case is sealed at the factory and is not intended to be opened, except by authorized service technicians. Do not attempt to separate the two halves of the meter case as this may

damage the instrument, break the water-resistant seal and may void the manufacturer's warranty.

2.7 Calibration Vessels

A plastic 100 mL graduated cylinder and a plastic container are provided with the Model 60. The graduated cylinder provides a convenient place to calibrate the pH sensor minimizing the amount of solution needed. The plastic container should be filled with distilled water and used as a rinse vessel while in the field. See section 4.2 Calibration for details.

3. Preparing the Probe

The YSI Model 60 is shipped without the pH sensor installed. The pH sensor must be installed before using the system (see section 3.1 Installing the Sensor, below). The sensor is shipped with a protective bottle filled with a mixture of pH 4 buffer and KCl solution. Do not remove the bottle until you are ready to use the instrument. Save the bottle for long term storage of the probe.

3.1 Installing the Sensor

A pH sensor is included with the Model 60. Install the pH sensor as follows:

1. Remove the sensor from its protective packing.

2. Insert the pH sensor into the probe body (be sure to align the tabs on the sensor with the slots in

the probe body) and twist 1/4 turn to lock in place. See Figure 3.

NOTE: Once installed, leave the pH sensor attached to the probe until replacement is needed.

3. Carefully remove the protective bottle (containing pH 4 buffer/KCl solution) from the sensor.

Save the bottle and solution for long term (over one week) storage of the sensor. Seal the storage bottle with the cap provided.

4. Rinse the sensor tip with distilled or deionized water.

5. Calibrate the system before use. See section 4.2 Calibration.

Align tabs with slots in probe body

Turn sensor 1/4 turn to lock in place

Insert pH sensor into probe body

Figure 3

4. Operation

The following diagram is an overview of the operation of the Model 60. See the following sections for details of operation.

Figure 4

4.1 Turning The Instrument On

With the batteries installed correctly, press the ON/OFF key. The instrument will activate all segments of the display for a few seconds, which will be followed by a self test procedure which will last for several more seconds. During this power on self test sequence, the instrument’s microprocessor is verifying that the system is working properly. If the instrument were to detect a problem, a continuous error message would be displayed. See the chapter entitled Troubleshooting for a list of error messages.

7.23 pH

24.8

°C

4.2 Calibration

The YSI Model 60 MUST be calibrated before making pH measurements. Calibration may be performed at 1, 2 or 3-points (at pH 7, 4 and 10, or at pH 6.86, 4.01 and 9.18). Perform a 1-point calibration (at pH 7 or at pH 6.86) ONLY if a previous 2 or 3-point calibration has been performed recently. In most cases, a 2-point pH calibration will be sufficient for accurate pH measurements, but if the general range of pH in the sample is not known, a 3-point calibration may be necessary. 3-point calibration assures accurate pH readings regardless of the pH value of the sample. See Section 8.1 pH for more details.

WARNING: Calibration reagents may be hazardous to your health. Refer to Appendix B - Health and Safety for more information.

Before calibrating the YSI Model 60, complete the procedures discussed in the Preparing the Meter and Preparing the Probe chapters of this manual.

The user can choose from two sets of pH buffer values for 3-point calibration. The first set consists of the standard YSI pH buffer values of pH 7 (YSI 3822), pH 4 (YSI 3821) and pH 10 (YSI 3823). The second set available is the NIST pH 6.86, 4.01 and 9.18. Note that the first calibration point must be either pH 7 or pH 6.86. Calibration is performed as follows:

1. Turn the instrument on by pressing the ON/OFF key. If the instrument was already on, press

the MODE key until pH is displayed.

2. Rinse the probe with deionized or distilled water, then carefully dry the probe (or rinse it

with some of the pH buffer solution to be used for calibration).

3. Place 30 to 35 mL of the pH buffer you have chosen to calibrate the system with (pH 7 or

6.86) in the 100 mL graduated cylinder (provided with the Model 60). The graduated cylinder minimizes the amount of solution needed. Immerse the probe making sure that both the pH and temperature sensors are covered by the solution (see Figure 5 on the following page).

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