P3.0: V IEW E LECTRODE D ATA (ELE)

This menu features data of the electrode properties for diagnostic purposes. The

“view only” parameters such as the electrode Slope Factor (k), % Saturation Offset setting, 100% Saturation mV value and 0% Saturation mV value are very useful in determining the life efficiency of the electrode. These electrode properties can be examined through its data in % Saturation and mg/L (ppm) which is available in their Set Up menu respectively.

8.4.1 EL.1 Viewing the electrode Slope Factor This parameter lets you view and gives an indication of the probe’s efficiency. The value displayed is the ratio of the theoretical value and the actual value produced by the probe. The higher the number, the lower the mV output from the probe. The ratio displays from 0.5 to 1.999.

From the % Saturation menu,

1. Press the SETUP key to enter Set up mode.

2. Press the MI/▲ or MR/▼ keys to scroll through subgroups until you view parameter P3.0.

3. Press the HOLD/ENTER key to enter the menu and view the Slope Factor (K) of the electrode.

Figure 18: P2.0 - View

8.4.2 EL.2 Viewing the % Saturation Offset (Only available in % Saturation Set Up menu):

This parameter shows you the amount of the % Saturation Offset entered in the other parameter “OFS” P7.0.

From Step 3 above,

4. Press the HOLD/ENTER key to enter the % Saturation Offset viewing menu. The meter will display the last offset adjustment made.

8.4.3 Viewing the 100% Saturation mV value

This parameter shows the sensor’s mV output corresponding to 100% Saturation.

From Step 4 above,

5. Press the HOLD/ENTER key. The display will show the sensor’s mV output value with respect to 100%

Saturation.

8.4.4 Viewing the 0% Saturation mV value

This parameter lets you view the sensor’s mV output corresponding to 0% Saturation.

From Step 5 above,

6. Press the HOLD/ENTER key. The display will show the sensor’s mV output value with respect to 0%

Saturation.

7. Press the HOLD/ENTER key again to exit to the subgroup menu. Press CAL to return to the measurement mode.

Note: To view the electrode properties in the mg/L

(ppm), repeat the whole steps above using the mg/L (ppm) Set Up menu.

Viewing of the % Saturation Offset will be skipped in this menu and the viewing sequence will as follows:

EL.1 Electrode Slope Factor EL.2 100% Saturation mV value

Figure 20: P3.0 - View % Saturation offset, electrode mV value in 100%

and 0% saturation

8.5

P4.0 : Auto-Off (AtO)

In Program P4.0 you can activate the AUTO-OFF option to automatically power off the instrument 20 minutes after the last key selection. This feature is useful for conserving battery power. Under default conditions, the instrument has this option activated.

1. Press the SETUP key to enter Set Up mode.

2. Press the MI/▲ or MR/▼ keys to scroll through subgroups until you view parameter P4.0.

3. Press the HOLD/ENTER key.

4. Press MI/▲ or MR/▼ keys to select options

5. ‘YES” - Meter will automatically switch off 20 minutes after the last key operation.

6. ‘NO’ - Auto Off mode is switched off.

7. Press the HOLD/ENTER key to confirm and return to P4.0.

8. At any point, you can press the CAL/MEAS key to return to measurement mode.

Figure 21: P4.0 - Auto shut off feature

ENTER HOLD

SETUP

P 4.0

MR MI

SETUP

SETUP

yes

8.6

P5.0 : Reset to Factory Default (rSt)

This mode lets you reset all parameters to factory default settings. There are two levels of reset:

• Calibration Reset: Reset only the calibration values of % Saturation and mg/L (or ppm).

This clears all previous calibrated values and reset to factory default.

• User Reset: Clears all data including calibration, memory and other customised setup functions and reset it to factory default.

8.6.1 Calibration Reset

From measurement mode:

1. Press SETUP key to enter Set Up mode.

2. Press the MI/▲ or MR/▼ keys to scroll through subgroups until you view parameter P5.0.

3. Press the HOLD/ENTER key.

4. Press the MI/▲ or MR/▼ keys to toggle between NO and YES.

• ‘NO’ retains current settings

• ‘YES’ erase calibration settings.

5. Press the HOLD/ENTER key to confirm selection.

• If ‘NO’ is selected, it will retains current settings and proceed to next program P5.2 – User Reset.

• If ‘YES’ is selected, all LCD segments will lit up for one second, erase calibration values, and the meter switches to the measurement mode.

6. Otherwise press CAL/MEAS key to return to measurement mode without resetting to factory default.

Select either "YES" or "nO", press ENTER key to confirm.

Figure 22: P5.1 - Calibration reset

8.6.2 User Reset

This program clears all data including calibration, memory and other customised setup functions and reset it to factory default.

You can skip program P5.1 (Calibration Reset) and proceed straight to Program P5.2:

1. From Program P5.0 - rSt, press HOLD/ENTER key three times to P5.2. Press HOLD/ENTER key again to enter the User Reset menu.

2. Press the MI/▲ or MR/▼ keys to select or deselect the user reset function.

• ‘NO’ retains current settings

• ‘YES’ resets to factory default settings.

3. Press the ENTER key to confirm selection.

4. If ‘NO’ is selected, it will retains current settings and goes back to program 5.0.

5. If ‘YES’ is selected, all LCD segments will light up for one second, reset to factory default settings, and the meter will be in the measurement mode.

6. Otherwise press CAL/MEAS key to return to measurement mode without resetting to factory default.

yes

SETUP

SETUP

SETUP

P 5.2

ENTER HOLD

MR MI

Select either "YES" or "nO", press ENTER key to confirm.

Figure 23: P5.2 - User reset