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Checking Reaction Temperature
When reaction cell temperature control is enabled, at this
stage in the cycle the reaction cell temperature is tested
against the set point.
To enable or disable the REACTION TEMPERATURE
CONTROL, from the MAIN MENU follow the sequence:
➔
➔
MENU
SETUP
METHOD
TEMPERATURE CONTROL
If reaction temperature control is enabled, then the
temperature set point is editable. To edit the temperature set
point, from the MAIN MENU follow the sequence:
➔
➔
MENU
SETUP
METHOD
TEMPERATURE
The temperature stabilization is attained through PID control.
Once it reaches the set point, it stays almost at the same
temperature, until and unless the reaction temperature control
is disabled or set point is altered.
This test is allowed a maximum of 240 seconds for the
reaction cell to attain the set temperature. If it does not reach
stability or set point in the allowed time, it will flag a warning
message and proceed to the next step. The info field (if
enabled) shows the temperature progress bar.
No variation in temperature for a period of
80 seconds aborts the measurement, and
the info field will flash with the error
message: "PLEASE CHECK FOR
HEATER FAILURE".
If the temperature is not stabilized within
200 seconds and below the set point,
then the info field will flash with the
NOTE:
warning message: "CHECKING THE
REACTION TEMPERATURE.
TEMPERATURE BELOW SET POINT".
If the temperature is above the set point,
then the info field will flash with the
warning message: "CHECKING THE
REACTION TEMPERATURE.
TEMPERATURE ABOVE SET POINT".
24 |
Calibration of the Instrument for Measurement Analysis
➔
REACTION
➔
REACTION
Blank Measurement
In this event, a reading is recorded called BLANK
ABSORBANCE.
The stability of the recorded reading depends on the specified
stability criteria. You have the choice of editing the stability
criteria. To do this from the MAIN MENU follow the sequence:
➔
➔
MENU
SETUP
ANALYSIS PARAMETERS
➔
STABILITY CRITERIA
During this stage the info field (if enabled) shows the blank
measurement progress bar with the BLANK ABSORBANCE
reading in AU. (This is a relative value and NOT an absolute
value.)
For the ammonia measurement, the event of blank
measurement and its sequence in the measurement cycle is
done before adding the third color developing reagent.
When unstable and not meeting the
stability criteria, the info field will flash
NOTE:
with the warning message "TAKING
BLANK MEASUREMENT, UNSTABLE
SIGNAL".
Add Reagents
In add reagent, the reagent(s) is pumped into the reaction cell.
You are allowed to edit the volume of the reagent to be
pumped by the parameter called REAGENT VOLUME.
Depends on the range selected a dilution cycle is enabled that
uses Reagent1 to effect the necessary dilution ratio.
To edit the reagent volume, from the MAIN MENU follow the
sequence:
➔
➔
MAIN MENU
SETUP
➔
REAGENT VOLUME (1, 2)
In reagent volume, the positive volume is to pump the reagent
in to the reaction cell, and the negative volume is to pump
back any reagent drops in the pump delivery tube after the
reagent addition is completed. After pumping the reagent, the
stirrer is turned on for an editable period of time called STIR
TIME to mix the reagent thoroughly with sample.
To edit the reagent volume, from the MAIN MENU follow the
sequence:
➔
➔
MAIN MENU
SETUP
➔
STIR TIME (1, 2)
➔
METHOD
(+) to go to page 2
➔
METHOD
(+) to go to page 2
Orion 2210AM Ammonia Analyzer
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