Instruction manual

22 Thermo Scientific Alpha pH 560
Press ENT key to exit from the calibration.
55
The pH Controller reverts to pH measurement mode.
NOTES:
• To exit from pH calibration mode without confirming calibration,
Press ▲ and ▼ keys together
• When confirming the buffer measurement, if the measured pH
value is not within ±1.00pH from selected buffer value, the
electrode annunciator blinks and ERR indicator appears in the
display. This error can also occur if non-standard buffers are used or
the electrode has worn out. If this happens, press both ▲and ▼
keys together to restart the calibration beginning from Step1
• When calibrating with manual temperature compensation, the
meter automatically changes from the preset process temperature to
the calibration temperature. After leaving the calibration mode, the
pH Controller reverts back to process temperature
The pH Controller allows a single point ORP calibration. ORP
calibration process is available only when the measurement mode is set
to ORP. (Refer Page 32 for switching measurement modes).
Figure 4–19. ORP Calibration
11
From ORP measurement mode press CAL key to enter
calibration mode as described in page 16. The LCD shows
‘CAL OrP’. Press ENT key to begin calibration.
2
Place the electrode in a standard ORP solution of known
OPR value. Immerse the temperature probe in the buffer
solution if ATC mode is enabled. Immerse the potential
matching pin in the buffer if symmetrical mode is enabled.
The buffer annunciator & electrode annunciator
appear in LCD. The upper display shows the current mV
output of the electrode with offset adjustment (if any).
The lower display shows the default (uncalibrated) mV
output of the electrode. Allow the reading to stabilize.
LCD shows ‘READY’ annunciator when the reading is
stable.
Press ▲ or ▼ key to set the upper display value to the
ORP Calibration