Triplett PH180 Bedienungsanleitung

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User Manual

PH180

Waterproof pH Meter

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Introduction

Thank you for selecting the Triplett PH180 pH meter. This instrument is

designed for high accuracy pH testing for solids, semi-solids and liquids.

This device is shipped fully tested and calibrated, and with proper use,

will provide years of reliable service.

Features

 Measures from 0 to 14 pH with 0.01pH resolution

 ATC (Automatic Temperature Control) compensates for temperature

changes

 Dual display for pH and Temperature

 Analog bargraph for viewing trends

 1-, 2-, or 3- point calibration

 RENEW warning when probe needs cleaning or replacement

 Waterproof (IP57)

 Auto power off (after 10 minutes) with disable

 Includes meter with flat surface pH probe and protective cap, four(4)

CR2032 batteries, cup with cap and neckstrap

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Description

METER DESCRIPTION

1. Battery compartment cap

2. LCD Display

3. MODE / HOLD button

4. CAL / RECALL button

5. ON/OFF button

6. Electrode collar

7. Electrode

LCD DISPLAY

1. Bar graph reading

2. Measurement Units

3. Main Display

4. RENEW Indicator

5. HOLD Indicator

6. RANGE Calibration Indicator

7. Low Battery Indicator

8. Temperature Display

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CAUTION

This device is not a toy and must not reach children’s hands. It contains

hazardous objects as well as small parts that the children could swallow.

In case a child swallows any of them, please contact a physician

immediately

Do not leave batteries and packing material lying around unattended;

they can be dangerous for children if they use them as toys

In case the device is going to be unused for an extended period of time,

remove the batteries to prevent them from draining

Expired or damaged batteries can cause cauterization on contact with

the skin. Always, use suitable hand gloves in such cases

See that the batteries are not short-circuited. Do not throw batteries into

the fire.

Overview

pH Overview

pH is a unit of measure (ranging from 0 to 14pH) indicating the degree of

acidity or alkalinity of a solution. pH tests are the most commonly

performed measurements in water analysis and reports the negative log

of the hydrogen ion activity of a solution which is an indicator of acidity or

alkalinity. Solutions with a pH less than 7 are considered acidic, solutions

with a pH higher than 7 are known as bases, and solutions with a pH of

exactly 7 are neutral.

The pH scale is logarithmic so, for example, if sample A is 1 pH less than

Sample B, this means that Sample A is 10 times more acidic then

Sample B. A difference of 1 pH represents a ten-fold difference in acidity.

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Getting Started

For new meters, remove the battery cap and then remove the battery

insulating strip.

Remove the cap from the bottom of the PH180 to expose the electrode

glass surface and reference junction

Before first use or after extended storage, soak the electrode (with its cap

removed) in a pH 4 solution for about 10 minutes

White KCL crystals may be present in the cap. These crystals will

dissolve in the soak or they can be simply rinsed with tap water

Always calibrate close to the expected measurement value

A sponge is located in the electrode protective cap. Keep this sponge

soaked with a pH 4 solution to preserve Electrode life during storage

Replacing Electrodes

The PH180 is shipped with an electrode attached. Electrode life is

limited and is dependent on (among other factors) frequency of use

and care. If the electrode needs to be replaced, follow these steps for

removing and connecting electrodes.

1. To remove an electrode, unscrew and completely remove the

electrode retaining collar.

2. Gently rock the electrode from side to side, pulling it away from the

meter, until it disconnects.

3. To attach an electrode, carefully plug the electrode into the meter

socket (note that the electrode connector is keyed, ensuring proper

connection).

4. Secure the electrode in place by tightly turning the collar in place. (a

rubber gasket seals the electrode with the meter).

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Automatic Electrode Recognition

When the PH180 is turned on, it recognizes the type of electrode that

is connected and displays the appropriate unit of measure. Attach

electrode before turning the PH180 on.

Powering ON/OFF the meter

If the batteries are weak, the ‘ ’ indicator appears on the LCD. Press

the ON/OFF key to turn the PH180 on or off. The auto power off feature

shuts the PH180 off automatically after 10 minutes of inactivity to preserve

battery life.

Operation

Overview

When the electrode is placed in a solution, the main display and bargraph

indicate the pH reading while the lower display reads temperature

(readings flash until they have stabilized). The bargraph is ‘center zero’,

i.e. at pH 7 there is no display. As the pH rises, the bar moves from the

center to the right. If the pH drops, the bar moves from the center to the

left.

pH Calibration (1, 2, or 3 points)

A two point calibration with a buffer of 7 plus 4 or 10 (whichever is nearest

to the expected sample value) is always recommended. A one point

calibration (choose the value closest to the expected sample value) is also

valid.

1. Place the electrode into a buffer solution (4, 7, or 10). Press and hold

the CAL/RECALL key until “CAL” appears in the lower (temp.)

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display. When doing a 2 or 3 point calibration, calibrate with pH 7

buffer first, then follow with pH 4 then the pH 10 buffer.

2. The WQ120® automatically recognizes the solution and calibrates

itself to that value (the circled number on the LCD will match the

solution). Note that if the solution is more than 1 pH unit off from the L

(4), M (7), or H (10) pH buffer, or if the electrode slope is low, the

WQ120® will assume an error and abort the calibration (‘End’ will be

displayed, and the unit will return to measure mode.)

3. During calibration, the pH reading flashes on the main display.

4. When calibration is complete, the WQ120® automatically displays

“SA”, then “End” and returns to normal operation mode.

5. The appropriate circled indicator (L, M, or H) appears on the LCD

when a particular calibration or series of calibrations has been

completed within one power on cycle. When the WQ120® is turned

off, the circled indicator configuration and the calibration data will be

retained.

6. For a two or three-point calibration, repeat steps 1-4.

7. See Reset Calibration Data to clear all calibration data from the

meter.

Changing the Displayed Temperature Units

To change the displayed temperature units (oC or oF):

1. With the unit OFF, press and hold down the CAL/RECALL button.

2. With the CAL/RECALL button depressed momentarily press the

ON/OFF button. When “SELF CAL” appears in the display release

the CAL/RECALL button. The unit will power on with temperature

displayed in the new units.

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Data Hold

Press the MODE/HOLD button to hold (freeze) a reading in the display.

The meter will enter the HOLD mode and the “HOLD” indicator will

appear.

Note: This also stores the reading.

Press the MODE/HOLD button again to return to normal operation.

Storing Readings into Memory

1. Press the MODE/HOLD button to store a

reading. The storage location number will be

displayed on the lower display, while the main

display shows the stored reading. The meter will

enter the HOLD mode and the “HOLD” indicator

will appear.

2. Press the MODE/HOLD button again to exit the

HOLD mode and return to normal operation.

3. If more than 25 readings are stored, previously stored readings

(starting with number 1) will be overwritten.

Recalling Stored Readings

1. Press the CAL/RECALL button and then press the

MODE/HOLD button. A locPress the CAL/RECALL button and

then press the MODE/HOLD button. A location number (1 through

25) will briefly appear and then the value stored in that location will

appear. The displayed units will flash, indicating that the storage

recall mode is active.

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2. The last stored reading will be displayed first. Pressing and

releasing the MODE/HOLD button will scroll through the stored

readings one at a time. The location number is displayed first,

followed by the reading stored in that location.

3. To exit the storage mode, press the CAL/RECALL button and the

meter will return to normal operation, after displaying “End”.

Clear Stored Memory

With the unit on, press and hold ON/OFF for 4 seconds. “CLr” will be

briefly displayed when the memory is cleared.

Auto Power OFF

The auto power off feature automatically shuts the meter off 10 minutes

after the most recent button press.

Auto Power OFF Disable

To disable the Auto Power Off feature:

1. Turn the unit on

2. Press CAL/RECALL once (Quickly)

3. Immediately and simultaneously press the MODE/HOLD and

ON/OFF buttons for approximately 2 seconds, until “oFF” is briefly

displayed

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To disengage this feature, turn the unit off with the ON/OFF button.

The next time the unit is powered up, Auto Power OFF mode will be

engaged again.

CAL Reminder Display

When the PH180 is turned on in the pH mode for the 15th time without

recalibration, the ‘CAL’ icon appears on the LCD indicating that the

PH180 may require calibration. Some applications may require

recalibration of the electrode more frequently than others. The CAL

display is simply a reminder and will turn off when the pH electrode is

recalibrated.

RENEW Display

A flashing ‘RENEW’ warning indicates that the probe is not performing

to expected specifications. If cleaning and recalibration does not

cause the RENEW icon to disappear, replace the probe (see optional

accessories on the last page of this manual). The RENEW display

appears as a result of the pH electrode slope falling below 65% of a

nominal slope.

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/HOLD button. (“HOLD” will be displayed in the bottom left of the

LCD.) Simply press the MODE/HOLD button again or turn the meter off

and then on.

For maximum accuracy, allow sufficient time for the temperature of the

probe to reach the temperature of the sample before calibrating. This will

be indicated by a stable temperature reading on the display.

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