Calibration Procedure - Conductivity/Resistivity - Signet 9900 Operating Instructions Manual

Calibration Procedures - Conductivity / Resistivity
Calibration Procedure - Conductivity / Resistivity
AutoCal is the fastest and simplest periodic calibration method.
Requires prepared buffer of a value appropriate to your process.
AutoCal Procedure
AutoCal is a single-point calibration system. During this procedure, if the measured
value is within ± 10% of any of the test values listed below, the 9900 will automatically
recognize the test value and calibrate the output to that value.
NOTE: The fi rst step (Reset) is recommended each time an electrode is replaced, but is
NOT necessary upon initial installation or periodic calibration.
NOTE: Ensure that the buffer solution is within ± 5 °C of 25 °C.
1. Reset the sensor to factory calibration (refer to sensor manual for procedure).
2. On the 9900, select AUTO CAL from the CAL menu. Press ►.
3. Place the electrode/sensor assembly into the conductivity test solution appropriate
to your operating range. Shake the electrode to dislodge any air bubbles visible on
the surface of the electrode.
4. Allow at least 2 minutes for the electrode response to stabilize.
5. When the display stabilizes, press ENTER.
6. If calibration is successful, 9900 will display "SAVING". If error is too large,
"OUT OF RANGE USE MANUAL CALIBRATION" will display.
Calibration is complete. Return the system to service.
Manual Cal Procedure
NOTE: The fi rst step (Reset) is recommended each time an electrode is replaced,
but is NOT necessary upon initial installation or periodic calibration.
NOTE: Ensure that the buffer solution is within ± 5 °C of 25 °C.
1. Reset the sensor to factory calibration (refer to sensor manual for procedure).
2. On the 9900, select MANUAL CAL from the CAL menu. Press ►.
3. Place the electrode/sensor assembly into the conductivity test solution appropriate
to your operating range. Shake the electrode to dislodge any air bubbles visible on
the surface of the electrode.
4. Allow at least 2 minutes for the electrode response to stabilize.
5. When the display stabilizes, enter the value of the buffer solution using the ▼, ▲
and ► buttons.
6. Press ENTER.
7. 9900 will display "SAVING". If error is too large, "ERR TOO LARGE TO
CALIBRATE" will display.
Calibration is complete. Return the system to service.
60 9900 Transmitter
Conductivity units are
displayed as selected in
the CALIBRATE menu.
Resistivity displayed
when KΩ or MΩ ranges
are selected.
Available buffer values are:
● 10
● 100
● 146.93
● 200
● 500
● 1000
● 1408.8
● 5000
● 10,000
● 12856
● 50,000
● 100,000
(all values in μS)