Navigator 600 Phosphate
Multi-stream
Appendix G – Analyzing a Grab Sample
IM/NAV6P/MS–EN Rev. F
81
Appendix G –
Analyzing a Grab Sample
To analyze a grab sample:
1. Disable all streams apart from one:
a. at the 'Main Configuration' menu, select 'Measurement'
and scroll down to 'Enable Streams'.
b. press 'Enter' and untick each stream, leaving 1 ticked.
c. press the 'Menu' key and exit by 'Saving Current
Configuration' to internal memory.
2. Setup a grab sample:
a. unscrew the Secondary bottle lid and remove the level
sensor.
b. rinse the level sensor with high purity water.
c. place the level sensor into a grab sample container.
3. Energize the Secondary Calibration Valve:
a. at the 'Calibration & Maintenance' parameter, select
'Manual Test Settings' and press 'OK' (this takes the
unit Offline).
b. go to 'Test Valves' and set 'Sec. Cal Value On' by
pressing Enter.
c. exit this section by selecting 'TEST' mode (not
'NORMAL').
4. Measure the sample:
a. leave the sample flowing for at least 20 minutes – the
reading stabilizes between 15 and 20 minutes,
depending upon the difference in silica levels from the
analyzer sample and the grab sample.
5. Finish:
a. remove the level sensor form the grab sample, rinse
thoroughly with high purity water, place back in the
secondary calibration solution.
b. leave running for a 5 minutes to allow the sample line
to flush through.
6. Enable all the streams to be sample as before – follow
step 1,ensuring all required streams are ticked.
7. De-energize the Secondary Calibration Valve:
a. return to the 'Calibration & Maintenance' parameter
'Manual Test Settings' option, select 'Exit' and press
'Enter'.
b. exit this section by selecting 'NORMAL' (not 'TEST') –
the analyzer now reverts to normal operation following
a recovery period.