Alarm Setup - Hach Lange CL17 User Manual

Menu option
RELAY TEST
1
REF
1
SAMPLE
1
ZERO
1
CYCLE TIME
POWER FAIL
WARNING
DIAG OUTPUT
KEYBOARD
LOCKOUT
LANGUAGE
DEFAULT SETUP
1
These functions are used by service technicians to troubleshoot the instrument.

5.2.2 Alarm setup

Table 6 Setup menu options
Description
Press to momentarily turn the relays off, then sequentially turn on ALARM1 and ALARM 2.
ENTER
Automatically clears both alarms to complete the test.
Momentarily displays the last Reference A/D counts.
Momentarily displays the last Sample A/D counts.
Momentarily displays the last Zero A/D counts.
Momentarily displays the Motor On time (in seconds).
Sets the power fail warning to
between and . Press
ON OFF
If the power fail warning is turned on and the power is interrupted, a system warning will be
generated when power is restored. The factory default is off.
Pressing will momentarily indicate
ENTER
interfaces present will receive diagnostic data.
Press then use the
ENTER
displayed option. Press
EXIT
functions are allowed and all diagnostics are disabled except this one. The factory default is
English language is the factory default. Spanish, French, and German can be enabled.
Press then use the
ENTER
key when the language of choice is displayed. Press the
.
SETUP
Cold Start—Press to reset the instrument to factory defaults. All user-specified settings will
ENTER
be lost. The display will show the software version number (V 1.2 for example) until the next
analysis is complete.
This menu accesses two unpowered alarm relays (
and . The alarm relays may be assigned to one of the alarm functions
CLEAR WARNINGS
listed below. Only one function can be assigned to each relay.
• LO—Alarm is triggered if concentration is less than or equal to the trip point. (0.0 mg/L
to 5.0 mg/L limits)
• HI— Alarm is triggered if concentration is greater than or equal to the trip point. (0.0
mg/L to 5.0 mg/L limits)
• SYSTEM ALARM (SA)—Activates an alarm when a system alarm occurs.
• SYSTEM WARNING (SW)—Activates an alarm when a system warning occurs.
In addition, alarm status can be obtained and alarms can be cleared using this menu.
The relay is activated when an alarm condition occurs. Either relay may be activated on a
high chlorine alarm, a low chlorine alarm or when a System Warning or System Alarm
occurs. Alarm relays can be used to control chemical feeds as an on/off control, by using
them as a high or low alarm set point.
The two alarm relays can also be used to bracket a specific control range by adding a
double-pole double-throw auxiliary relay and wiring it to electrically latch. This allows the
pump to be turned on at a low level and off at a higher level—with the concentration
dropping down in between.
or . Press
ON OFF ENTER
to select. Press
ENTER EXIT
at the display and any optional LonWorks®
ON
keys to toggle between
ARROW
to return to the menu. If the keyboard is locked out, no editing
SETUP
keys to move between the available options. Press the
ARROW
then use the keys to toggle
ARROW
to accept changes and return to
and . Press
ON OFF ENTER
key to accept changes and return to
EXIT
and ),
AL1 AL2 RECALL WARNINGS
Operation
.
SETUP
to select the
.
OFF
ENTER
,
33