4220 Flow Meter
Section 2 Programming
trols the flow meter remotely, via phone lines and a modem, or locally with a laptop computer and cable. In any event, if the sampler pacing definition is controlled by Flowlink, it can only be changed through Flowlink.
If you select CONDITIONAL for sampler pacing, the following will appear:
CONDITION
• (LEVEL) • • (FLOW RATE) • • (RAINFALL) • • (D. O.) •
(pH), (TEMPERATURE), (YSI pH), (YSI DO), (YSI CONDUC- TIVITY) and (YSI TEMP) may also appear. Note that all the con- ditions shown above are in parentheses. Which ones actually appear depends on your previous programming selections. At least one of these options will be available to you.
Pressing the right arrow key may be necessary to bring all items onto the display, provided they are available for use.
LEVEL will only appear if the flow meter is set up to measure level or flow.
RAINFALL, D.O., pH, and TEMPERATURE measurement require the appropriate sensor probe be used with the flow meter. Remember that only one parameter condition (D.O. or pH) can be measured by the flow meter at a time, unless you use the YSI 600 Sonde.
RAINFALL can appear if you have a rain gauge attached to the flow meter.
TEMPERATURE can be measured alone, or with either parameter.
D. O. and/or pH may not appear on the menu, depending on selections made in step 1. If you do not see the item you need, return to step 1, and recheck your programming. If you did not make the proper selections there, certain menu options will not appear here, as they would have been locked out.
The YSI 600 conditions of pH, DO, CONDUCTIVITY, and TEM- PERATURE will only appear on the menu if you have turned them on in steps 1 and 3.
For any of these conditions, you can set the point at which change in the selected condition causes the flow meter to send a flow pulse to the sampler. The following menu will appear:
CONDITION
• GREATER THAN • • LESS THAN • • RATE OF CHANGE •
If you select GREATER THAN, the flow meter will ask you to enter a maximum value for the selected condition, which if exceeded, will trigger the flow pulse.
If you select LESS THAN, the flow meter will ask you to enter a minimum value for the selected condition. If the condition falls below that value later, the flow meter will send a flow pulse to the sampler.
If you select RATE OF CHANGE, the flow meter will ask for two values: one for the condition, and the other for the time interval over which the change occurs.
