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8.4.1 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
or
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.
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
and
buttons. Once the
desired set point has been set, press the
button to accept it.
The Remote Standby limits the relays to a single
normally open connection. Although the alarm 2 menu
may display, this alarm can be used.
NOTICE
Due to the cyclic nature of the instrument, relay chatter is not an
issue. There is no need for alarm delays or hysteresis.
8.5 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 6.3 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
or
buttons. (
On or OFF
).
8.6 Extended Settings
The last settings are grouped together to prevent them from being
adjusted by accident. To gain access to the extended settings, select
On
using the
or
buttons and press the
button.
If extended settings are set to
OFF
, pressing the
button will save all
settings and the CLX-Ex will automatically return to the normal
AUTO
mode of the instrument.
8.7 Units of Measurement
The unit of measure can be set to either mg/L (milligrams per liter) or
PPM (parts per million). The factory setting is mg/L. Select the desired
UNIT using the
and
buttons and press the
button to accept it.
8.8 Averaging and Filtering
The CLX-Ex can display and output averaged readings to help smooth
out the response and eliminate large reading variation in rapidly
changing processes. There are 5 settings for the averaging feature:
1 = No averaging, each reading is in “real time”.
2 = The current reading and previous reading are averaged.
3 = The current reading and previous 2 readings are averaged.
4 = The current reading and previous 3 readings are averaged.
5 = The current reading and previous 4 readings are averaged.
The factory setting is averaging of 2. Select the desired AVG using the
and
buttons and press the
button to accept it.
mg/L screen
PPM screen
8.4 Configuring the Alarm
One relay is provided that are designed to operate as an independent
programmable alarm or as a system problem alarm. Please note that
changes to the alarm will not be recognized until the start of the next
cycle. Two settings must be selected to fully program the alarm:
1. The alarm function (HI, LO, OFF or Error)
2. The alarm set point (level at which the alarm activates)
These items are described below:
Alarm Function:
The alarm can either be turned OFF or selected to
operate in one of three different manners:
1. HI alarm: the relay changes state when the measured chlorine level
is higher than the programmed alarm level (set point).
2. LO alarm: the relay changes state when the measured chlorine level
is lower than the 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 the 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.
