ANDalyze AND1100 Manual del usuario - Página 12
Navegue en línea o descargue pdf Manual del usuario para Instrumentos de medida ANDalyze AND1100. ANDalyze AND1100 16 páginas. Fluorimeter for water testing
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5.2 On‐Site Calibration
When testing water at a new location, the instrument has to be calibrated for accurate readings. Completing
the On‐Site Calibration requires two separate solutions and tests. At the end of the process, the fluorimeter is
calibrated for testing water at that site and also provides the lead test results for this site. A calibration may
only be accurate when originally performed. Do not rely on a calibration to be accurate over long time periods
as environmental samples can vary greatly.
The On‐Site calibration process adjusts for changes in sample matrix (such as ionic strength and pH) by
calculating the recovery of a known spike in that matrix. When a user performs an on‐site calibration for Lead,
for example, the fluorimeter software calculates the ppb of lead in the sample (a) and the ppb of lead in
sample spiked with 25 ppb lead (b) using the calibration curve from the 3 point calibration (initially completed
at factory or in laboratory). It then calculates an accuracy factor based on % recovery. Accuracy factor = 25/b‐a.
This factor is stored for a particular site that the user enters. The sample concentration displayed after an on‐
site calibration = a * accuracy factor.
Important: On‐Site calibration must be performed if testing is being done:
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At a new location which has not been previously saved.
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To adjust for significant changes in sampling temperature.
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When beginning to use a new lot of sensors.
See the specific Testing and Calibration Manual for detailed instructions.
5.3 Selecting a Site
1. On the Home screen select the Site option.
2. Using the up‐down keys highlight the
desired site and press Select.
3. On the Site/Sensor Details, choose Select.
5.4 Deleting a Site
1. When in the Site/Sensor Details screen,
using the left‐right keys, scroll to Delete and
select.
2. On the Confirm Delete screen, select Delete.
ANDalyze Inc. 800 Boylston Street, Prudential Tower, Floor 16, Boston, MA 02199 USA Tel. +1 857.453.6740 www.andalyze.com
Page 12 of 16
July 1, 2013