Hach 900 MAX - Manual (Page 119)

Appendix B
Page 117
8990apdx_pfeatures.fm Programming Features
Sensor Enabled
When the sensor is enabled, and volume calibration is selected, a single
manual calibration is taken. It does not matter if multiple volumes are
programmed (such as when using stormwater or upset sampling). When the
sensor is enabled, a single “Manual Calibration” choice provides sufficient
information to adjust the sensor to all programmed volumes (see
Table 24 ).
Calibration Procedure—Sensor Disabled:
Note : Before calibrating, make
certain the desired sample volume
in the Setup menu is selected.
1. From the Main Menu, press OPTIONS .
2. Press VOLUME CALIBRATION .
3. Select the desired volume to calibrate if more than one is listed
(see
Table 24 ).
4. Slip the pump tube off the sample fitting (near where it exits the pump
housing) and direct the end of the pump tube into a graduated cylinder.
5. Press START PUMPING . The pump will purge the line, and start pumping a
sample.
6. Press any key when the desired sample volume has been reached in the
graduated cylinder. The pump will stop to allow the line to completely
drain and then reverse to post-purge the line.
7. If the pumped sample volume is correct, press DONE . If not, repeat the
calibration cycle by pressing TRY AGAIN .
8. When finished, re-install the pump tube onto the sample fitting.
Note: To check the sample size after calibration use the Manual Mode function key to
take a grab sample. Do not go back into calibration to check the volume since the
volume compensation is reset to zero at the start of a calibration.
If one or more Timed Rinses are selected (sensor disabled), then they must
be calibrated as well. The Timed Rinse will rinse the intake line up to 3 times
prior to taking a sample.
Table 24 Calibration Volumes
Liquid Sampler Available Calibration Volumes
Enabled Manual Calibration
Disabled Main Sample Volume
Disabled/Stormwater
Main Sample Volume
First Flush Volume
Disabled/Upset Sampling
Main Sample Volume
Upset Sample Volume
Disabled/Storm & Upset
Main Sample Volume
Upset Sample Volume
First flush Volume
Disabled/If Timed Rinses Set Timed Rinse (in addition to the above)