Emerson 1057 Instruction Manual page 48

MODEL 1057
To calibrate pH:
1. Press the MENU button
2. Select Calibrate. Press ENTER.
3. Select Sensor 1 or Sensor 2 corresponding to
pH. Press ENTER.
4. Select pH. Press ENTER.
The following sub-sections show the initial display screen that appears for each calibration routine. Use the flow
diagram for pH calibration at the end of Sec. 7 and the live screen prompts to complete calibration.
7.2.2 AUTO CALIBRATION — pH
This screen appears after selecting pH calibration.
Note that pH auto calibration criteria can be changed.
The following criteria can be adjusted:
Stabilization time (default 10 sec.)
Stabilization pH value (default 0.02 pH)
Type of Buffer used for AUTO CALIBRATION
(default is Standard, non-commercial buffers).
The following commercial buffer tables are recognized
by the analyzer:
Standard (NIST plus pH7)
DIN 19267
Ingold
Merck
The following screen will appear if the auto cal is
successful. The screen will return to the pH Buffer Cal
Menu.
The following screens may appear if the auto cal is unsuccessful.
1. A High Slope Error will generate this screen display:
40
The following screen will appear. To calibrate pH or
Temperature scroll to the desired item and press
ENTER.
S1: 1.234µS/cm 1.234ºC
S2: 12.34pH
S3: 12.34µS/cm 1.234ºC
SN Calibrate?
pH
Temperature
S1: 1.234µS/cm 1.234ºC
S2: 12.34pH
S3: 12.34µS/cm 1.234ºC
SN pH Cal
Buffer Cal
Standardize
Slope:
Offset:
The following screen will appear to allow adjustment of
these criteria:
S1: 1.234µS/cm 1.234ºC
S2: 12.34pH
S3: 12.34µS/cm 1.234ºC
SN Setup
Stable Time:
Stable Delta: 0.02 pH
Buffer:
S1: 1.234µS/cm 1.234ºC
S2: 12.34pH
S3: 12.34µS/cm 1.234ºC
SN pH Auto Cal
Slope: 59.16 mV/pH
Offset:
S1: 1.234µS/cm 1.234ºC
S2: 12.34pH
S3: 12.34µS/cm 1.234ºC
SN pH Auto Cal
High Slope Error
Calculated: 62.11 mV/pH
Max: 62.00 mV/pH
Press EXIT
SECTION 7.0
CALIBRATION
1.234ºC
1.234ºC
59.16mV/pH
600 mV
1.234ºC
10 sec
Standard
1.234ºC
60 mV
1.234ºC