Kedida CT-6821 User Manual Download Page 3

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*Self- Checking Feature

 (Executing the function automatically after the meter is power on each time)

1. Press the ON/OFF key to turn on the meter, Self- Checking program will be auto-started with Full screen display.
2. the type of the meter will be displayed: 6821, then , the meter is ready for use.
3. the default mode is pH mode after the date of the manufacture.
4. The test mode will be same with the previous use.

*

pH Mode

1. Press the ON/OFF key for 3 seconds, until the 

pH

display on the screen.

2. Then press CAL to confirm, and the meter is ready to test in pH mode.

*

ORP Mode

1. Press the ON/OFF key for 3 seconds, until the 

pH

display on the screen.

2. Press HOLD key to select 

ORP

on the screen.

3. Then press CAL to confirm, and the meter is ready to test in ORP mode.

*

Backlight Mode

1. Press the ON/OFF key for 3 seconds, until the 

pH

display on the screen.

2. Press HOLD key to select 

LED

on the screen.

3. Then press CAL to confirm the backlight mode.
4. Power off the meter to close the backlight mode.

*

Hold Feature

Press 

HOLD

 to freeze the current reading, and „HOLD‟ will be appeared on the LCD. Press 

HOLD

 again to release the 

hold mode. 

*

Restore factory defaults

1. If the meter is out of order, Press the HOLD key for 3 seconds, until the 

CLR

display on the screen, release the

HOLD key and the factory setting is ready. 

2. The meter needs to recalibrate for pH measurement after the factory setting, but can be used directly for ORP

measurement. 

*

Automatic temperature compensation (ATC)

The product is capable of measuring with automatic temperature compensation when “ATC” displays on the screen. 

*

/

  Interchangeable

The default mode is 

, press CAL key to switch to 

Summary of Contents for CT-6821

Page 1: ... off the protection cap Any damage may cause the invalid of the electrode The duration period of the glass electrode is one year from the date of purchase whether you use it or not please change the electrode in time The electrode can not be used under the dry condition always soak the electrode into the distilled water or purified water for 5 30 minutes to activate before use Figure Part Name 1 B...

Page 2: ... sensor ATC auto temperature compensation Interchangeable Three point calibration for pH 4 0 pH 6 8 and pH 9 1 Already calibrated can be used directly SPECIFICATIONS Display LCD size 20 mm x 27 mm Consumption Measurement Range pH 0 0 to 14 0 pH ORP 500mV Resolution pH 0 1 pH ORP 2mV Accuracy pH 0 1 pH After calibration ORP 5mV pH Calibration pH4 0 pH6 8 pH9 1 Three Point Calibration ORP Calibratio...

Page 3: ...screen 2 Press HOLD key to select ORP on the screen 3 Then press CAL to confirm and the meter is ready to test in ORP mode Backlight Mode 1 Press the ON OFF key for 3 seconds until the pH display on the screen 2 Press HOLD key to select LED on the screen 3 Then press CAL to confirm the backlight mode 4 Power off the meter to close the backlight mode Hold Feature Press HOLD to freeze the current re...

Page 4: ...The pH value will be updated until a stable reading is reached The data maybe not accurate if the electrode is not be activated 4 press CAL key for 3 seconds until the text CAL appear on the display and release the key 5 Text SA will showing in the LCD denote that the current calibration result is saved 6 The text END will be displayed at the end The meter is ready for pH measurement Overrage Remi...

Page 5: ...fer solution Especially pay attention to the Electrode fixed collar if it is loosen when calibration it may cause the buffer solution enter the inside of the meter How to make pH buffer solution There are 3 pH buffer powder supplied with the meter when you buy them each powder should be Fully dissolved in water 250ml DO NOT use the metal containers Take the formulation of pH 6 8 buffer solution fo...

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