Hach-Lange ISENO318103 User Manual - Manual (Page 8)

1. Make sure a probe is connected to the meter.
2. Push and select ISENO3181 Settings.
3. Select Modify Current Settings.
4. Select Measurement Options and update the settings:
Option Description
Chemical Form Sets the concentration value—NO
3
- or NO
3
- -N.
Units Sets the preferred unit for ISE measurements—mg/L (default), µg/L, g/L,
g/kg, mol/L, mmol/L, mol/kg, %, ppm or ppb.
Note: The mV units are shown when the detailed display is selected.
Significant Digits Sets the significant digits shown—2, 3 (default) or 4.
Auto Stabilization Sets auto stabilization—on (default) or off.
The default stability drift rate is 1.0 mV/min.
Stability Criteria When Auto Stabilization is off, sets the stability criteria—0.1 to
9.9 mV/min.
• Lower stability criteria will require longer stabilization times, but the
measurement will be more precise.
• Higher stability criteria will require shorter stabilization times, but the
measurements may be less precise.
Measurement
Limits Sets the measurement limits—Lower limit (default: 0.1 mg/L) or Upper
limit (default: 14,000 mg/L).
The measurement limits can be set to match the acceptable values for
the sample. When the measurement is above the upper limit setting or
below the lower limit setting, the meter shows an "Out of limits"
message. This message is an alert to a potential problem with the
process conditions.
5. If prompted, enter a name for the new method settings. Additional changes made to
the settings of an existing method are automatically saved with the same method
name.
6. Push EXIT until the meter returns to the measurement mode.
Change calibration options
1. Make sure a probe is connected to the meter.
2. Push and select ISENO3181 Settings.
3. Select Modify Current Settings.
4. Select Calibration Options and update the settings:
Option Description
Std Set Sets the temperature compensated standard sets that are used for
calibration—
• 10, 100 or 1000 mg/L as NO
3
– –N
• 1, 10 or 100 mg/L as NO
3
– –N
• 1, 10, 100 or 1000 mg/L as NO
3
– –N
Standard set values are shown on the Calibration Options screen.
Custom standard sets are characterized at 25 °C (77 °F). Custom
standard values are not temperature compensated. Select the Custom
buffer to make a custom standard. Up to five standard values can be
made .
Note: Only the minimum calibration points must be measured for Done to
be shown on the calibration screen.
Chemical Form Sets the chemical form.
8