Thermo Fisher Scientific Alpha pH 1000 - Manual (Page 17)

12
CAL
SETUP
HOLD
226
SETUP
HOLD
C
8) Press the ENTER key. If you entered the calibration mode using the CAL key, the
controller will return to the Measurement mode. If you entered the calibration mode from the
Advanced Set-up mode, the controller will return to the sub-function menu.
Note: If there is a calibration error, the controller displays “ERR”. If this happens, press both the
▲
and ▼ keys (escape) to restart the calibration beginning from step 1.
Note: When calibrating with manual temperature compensation, the controller automatically
changes from the preset process temperature to the calibration temperature. After leaving the
Calibration mode, the controller switches back to process temperature (for setting the calibration
temperature and the process temperature, see section 7.2.3).
6.2 ORP – mV Calibration
This mode allows one-point calibration.
1) Enter Calibration mode. While in the
Measurement mode, press the CAL key and
scroll to Calibration code “11”. Press the
ENTER key again. The upper and lower display
reads “CAL OrP”.
NOTE: If the display reads “CAL pH”, see section
7.6.2 for procedures on how to switch from pH to
ORP mV readings.
2) Place sensor in the ORP solution.
3) Press the ENTER key to begin calibration. The
“CAL” indicator appears on the display. The
upper display shows the current mV output of
the electrode without any offset adjustment.
4) Press the
▲ and ▼ keys to match the mV
value to your exact reading.
5) To confirm, press the ENTER key. The
controller calculates the correction factor and
returns to the Measurement mode.