Hach 900 MAX - Manual (Page 53)

Section 3
Page 51
8990startup.fm Advanced Sampling
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 .
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 .
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
SETPOINT CONDITION:
HIGH
CONDITION
LOW
CONDITION
11:00 AM 21 - APR - 01 SETPOINT SAMPLING
ACCEPT SETPOINT SAMPLING:
HIGH TRIGGER POINT:
CANCEL
00000 in. CLEAR
ENTRY
(USE NUMERIC KEYPAD)
11:00 AM 21 - APR - 01 SETPOINT SAMPLING
ACCEPT SETPOINT SAMPLING
DEADBAND:
CANCEL
0.000 CLEAR
ENTRY
(USE NUMERIC KEYPAD)