Ionics Instruments
2004
Page 10-11
DLM 30007-08 Rev. A
4. Set up the instrument for sample mode: On Line sampling.
5. Set reagent flows: Acid = 0.20
µ
L/min and Oxidizer = .01
µ
L/min.
6. Analyze the water sample prepared in Step 1 (usually done overnight).
7. Calculate the average value of the last 5 TOC measurements.
8. Calculate the new TC Zero Offset using the following equation:
New TC Zero Offset = (Initial TC Zero Offset) – (Avg. TOC value from step7)
*
*
Be sure to note the sign of the Average TOC value and input the value accordingly; it may be
negative.
9. Enter in the new TC Zero offset.
**
10.
Rerun with new offset for 1-2 hours. TOC should be close to zero
PPB, if not repeat Steps 7-10.
**
If the absolute values of the new TC Zero Offset is greater than 50 ppb, contact an Ionics
Instruments Service Representative before inputting the new TC Zero Offset value.
Diagnostic Testing
The analyzer has the ability to perform several diagnostics tests. These tests
should only be run with the direction of an Ionics Instruments Service
Technician.
To run a test, scroll to MAINTENANCE on the MAIN menu and press ENTER.
Scroll to SERVICE and press ENTER. The following screen will display the
tests:
ENTER
CLEAR
ANALOG
4-20MA
VALVES
RS-232
PRINTER
ALARMS
FIGURE 10-6: SERVICE Menu
With the direction of an Ionics Instrument Service Technician, scroll to the
designated test and press ENTER. The test will run quickly and provide the
Summary of Contents for TOC 800
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