Temperature Calibration - Thermo Scientific ALPHA PH 550 Manual

1
CAL
HOLD
From ORP measurement mode press CAL key to enter calibration mode
1 1
as described in section 4.2. The LCD shows 'CAL OrP'. Press ENT key to
begin calibration.
Place the electrode in a standard ORP solution of known OPR value.
2
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
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 value of the
solution. Allowable range: -150mV to 150mV.
Press ENT key to confirm the value.
3
The pH Monitor reverts to ORP measurement mode.
4
4.5

Temperature Calibration

Calibrate temperature probe only if temperature value displayed on the pH Monitor
is different from that of a calibrated thermometer. Refer to section 5.3 for further
information temperature settings.
CAL
ENT
READY
HOLD
2
CAL
mV
READY
HOLD
- 22 -
3
mV
MEAS
ENT
READY
& electrode annunciator
4
R.mV
°C
ATC