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Backlight function
This instrument is provided with a backlight function. Pressing the
key lights the LCD in green.
This permits the pH readings on the LCD to be read easily even in a dark place.
The backlight is automatically turned off approx. 20 seconds after it is turned on. This prevents the
battery power from being consumed due to continuous use.
About the AC adapter
If the unit will be used for a long period of time, use of the AC adapter is recommended.
Insert the AC adapter plug into the AC adapter jack on the unit. If an AC adapter other than the one
provided by us is used, choose one that meets the specifications described below.
<Primary output>
Voltage
: 9VDC
Current capacity
: 500mA
Polarity
:
Diameter of jack
: Ø 3.4mm (D
’ DIA Ø1.35)
About the RS-232C output
⚫
RS-232C output
This instrument outputs data in real time on the pH, voltage and temperature while in the
measurement mode or the MAX/MIN logging mode.
When the unit is connected with a computer, data on the pH (or voltage) and the temperature
can be imported into the computer for analyzing or saving.
Note: The RS-232C cannot be used for output data while in the calibration mode or in the manual
temperature setting mode.
⚫
Connecting the cables
Use the RS-232C communication cable dedicated to this product.
(The cable is available as an option.)
(1) Insert the plug of the optional RS-232C cable all the way into the RS-232C jack on the
SK-620PH.
(2) Next, connect the other side of the cable to the serial port on the computer.
⚫
Communication standard and Communications protocol
Transmission speed
: 2400bps
Data bit
: 8 bits
Stop bit
: 1 bit
Parity check
: non
* Communications protocol
(1) pH display and the temperature (positive) display:
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