JENCO 6230M Operation manual - Operational Procedures
8
OPERATIONAL PROCEDURES
Before operation, you should turn on the unit.
BUFFER TABLE SELECTION
This unit has two buffer sets: 4.01,7.00, 10.01pH and 4.00,6.86, 9.18pH. To change
the buffer set, turn off the unit, then press and hold the STAND key while turning on
the unit again. The user can select 1-point, 2-point or 3-point pH calibration. The first
point must be 7.00/6.86 buffer. The second and the third will be either 4.01 or 10.01
when the first point is 7.00. If the first is 6.86 then the second and the third will be
either 4.00 or 9.18.
pH CALIBRATION
1. Calibration in the pH-AUTOLOCK mode.
1.1 Connect the pH electrode to the BNC connector and ATC/Temp probe to the
ATC/Temp connector of the unit. The ATC will be on. Press the MODE
key repeatedly until the unit displays pH-AUTOLOCK mode.
1.2 Rinse the pH electrode and ATC/Temp probe in distilled water and immerse
in the first buffer solution. The unit will display the buffer temperature.
NOTE: If no ATC/Temp probe is connected, the MAN will be on, adjust the
temperature reading (0.0 to 60.0
℃
) to that of the first buffer using the △
and ▽ keys.
1.3 Press the STAND key to calibrate. The pH annunciator flashes until the unit
exit pH calibration. The STAND annunciator will be on, and the WAIT
annunciator flashes until the unit detects a stable reading. When a stable
reading is reached, the WAIT annunciator will stop flashing and stay off.
The SLOPE annunciator will start to flash. This means that the first point
has been calibrated.
You can press the MODE key to exit for one point pH calibration. The pH
annunciator will stop flashing and be on, and the meter is ready for
measurements with STAND on but SLOPE off. If dual or three points
calibration is needed, go to 1.4.
1.4 Remove the pH electrode and ATC/Temp probe from the buffer and rinse
them in distilled water. After rinsing, immerse them in the second buffer
solution.
NOTE: If no ATC/Temp probe is connected, the MAN will be on, adjust the
temperature reading (0.0 to 60.0
℃
) to that of the second buffer using the
△ and ▽ keys.