Hach 900 manual Data Logging, Manual Mode, Manually Operating the Sample Pump

Section 4

Item	Message	Description of Message
Number
13c	TRY AGAIN?	If STOP PUMP was pressed before or after the desired rinse time, press YES to initiate
		another rinse cycle. Press NO to view item 16.
14	ENTER ID#	Enter an optional identification number if desired.
		This message indicates that all programming steps have been completed. Press START
	SETUP COMPLETE,	PROGRAM to begin. The display will read "Program Running". To review the program
15		operating status, press DISPLAY FEEDBACK.
	READY TO START
		When you press START PROGRAM, all recorded data are erased from memory. Always
		download recorded data before pressing START PROGRAM.

4.6 Data Logging

The sampler records the time and date that each sample was collected, up to 400 samples. It also records the time and date of up to 24 missed samples.

1. To access information, the sampler must be in the "Program Halted" or "Program Complete" standby state.

2. Press TIME/READ for two seconds. The display will read "Samples Taken".

3. To display the time/date for each sample, press YES. To advance to the next sample time/date, press YES again–and so forth, until all are given.

4. To exit this routine, press NO. The time and date of any missed samples are displayed after collected samples.

The sampler memory incorporates the “wrap around” method of data storage. That is, when the memory becomes full, the oldest stored data (sample number, time/date) are dropped as new data are received. The data logger retains the 400 most recent times/dates for the collected samples.

4.7 Manual Mode

4.7.1Manually Operating the Sample Pump

1.To manually operate the pump, place the sampler in standby state. The sampler is in standby state when the display reads "Ready to Start", "Program Halted", or "Program Complete".

2.To operate the pump, press either the PUMP or PURGE key. This will cause "Manual Mode - Pump/Purge/Clear" to appear on the display. Pressing the PUMP key causes the pump to run in the forward (sample) direction as long as the key is held. Pressing the PURGE key causes the pump to run in the reverse (purge) direction.

3.To run the pump continuously in either direction without having to hold down the PUMP or PURGE keys, press the * key. This will cause "Lock-Pump/Purge" to appear on the display. Then press either PUMP or PURGE.

4.To stop the pump, press STOP PUMP or turn the sampler off with the OFF key. Pressing STOP PUMP returns the display to "Pump/Purge/Clear".

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8544operations.fm	Data Logging