HF scientific CLX Online Residual Chlorine Monitor (Old) - Manual (Page 24)

programmed alarm level (set point).
3. Error alarm: If there is a system fault or problem the alarm will change states.
Alarm Set Point: The level at which an alarm activates is called the alarm set point. On
the instrument, the alarm set point is designated as “S/P”. The set point is adjustable to
any valid chlorine level over the range of the instrument in steps of 0.01 mg/L. This
setting is not available if the Error function is chosen
7.4.1 Alarm 1
Alarm 1 Function: The ALM1 is displayed and the display indicates the current
function of alarm 1 (HI, LO, OFF, or Error). Use the S or T buttons to cycle
through and select the desired function. Press the  button to accept the selection.
If the alarm was turned OFF, a prompt will appear to set up alarm 2 (go to section
7.4.2).
Alarm 1 Set Point: This prompt is used to select the set point for this alarm; this
is indicated by “S/P” shown on the lower row of the display. Select the desired
alarm level by using the S and T buttons. Once the desired set point has been
set, press the  button to accept it.
7.4.2 Alarm 2
Repeat the procedure listed in section 7.4.1 to set up the parameters for alarm 2. If
a selection was made to turn the alarm OFF, the next selection for the speed of
response RESP is shown.
Note: Due to the cyclic nature of the CLX, relay chatter is not an issue. There is no need for
alarm delays or hysteresis.
7.5 Enabling the Security Access
The instrument is equipped with a security access. If this option is turned on, the user is
required to input the access code into the instrument to get to any mode other than AUTO.
The only code is 333. This code may not be changed. See section 5.2 for more
information on this security feature. The security key icon will be visible and flashing on
the display whenever the access option is selected using the S or T buttons. (On or
OFF).
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