Hach 900 MAX manual Section, High

Section 3

13-C.Select either Start on Setpoint or Stop on Setpoint by pressing CHANGE CHOICE. Press ACCEPT to continue.

•Start on Setpoint will start a program when the setpoint condition is met. The program continues to run even if the condition falls back within the setpoint limits.

•Stop On Setpoint halts the program if the setpoint condition falls back within the setpoint limits and starts again if the limits are exceeded.

13-D.Highlight the desired channel to trigger from, then press SELECT. 13-E.Press either HIGH CONDITION or LOW CONDITION.

11:00 AM 21 - APR - 01	SETPOINT SAMPLING
	HIGH
SETPOINT CONDITION:	CONDITION
	LOW
	CONDITION

Note: Flow Rate of Change and Rainfall are signals that only increase and never decrease in value, therefore these signals do not require Low Condition.

The external control signal must be configured on the external equipment for the desired setpoint. An external control device must provide a dry contact and can include a float switch, push-button, external flow meter, etc. For interface connections refer to section 2.10 on page 29.

13-F.Enable or Disable the trigger point using the CHANGE CHOICE key.

13-G.Select the desired high or low trigger point using the numeric keypad. Press ACCEPT. Refer to Table 3.

11:00 AM 21 - APR - 01		SETPOINT SAMPLING
ACCEPT	SETPOINT SAMPLING:
	HIGH TRIGGER POINT:
CANCEL	00000 in.	CLEAR
		ENTRY
	(USE NUMERIC KEYPAD)

13-H.Enter the Deadband value if required or, if programming Flow Rate Of Change or Rainfall, enter a time interval that the flow or rainfall change must take place (refer to section 6.4 on page 87).

11:00 AM 21 - APR - 01

SETPOINT SAMPLING

ACCEPT	SETPOINT SAMPLING
	DEADBAND:
CANCEL	0.000	CLEAR
		ENTRY
	(USE NUMERIC KEYPAD)

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8990startup.fm	Advanced Sampling