Hach Lange CL17, Instrument Manual

Page: 38 / 74

Page 36
Instrument Menu Structure
54400_start.fm
Section 2
• CAL DEFAULTS —(Calibration Default Settings) Press
ENTER
to return
the calibration settings back to factory defaults and set the Gain to 1.0
and the Offset to 0. Use this feature to remove calibrations that are
causing a MARG G or MARG Z to be displayed.
• OFFSET —Press
ENTER
to momentarily display the current Zero
correction factor. The factory default is 0.
• GAIN —Press
ENTER
to momentarily display the current Gain correction
factor. The factory default for gain is 1, however, readings of 0.8 to 1.25
are acceptable.
• DISPLAY TEST —Press
ENTER
to momentarily display all LCD segments
to visually check that the complete display is functioning.
• RECMIN —Recorder signal test. Press
ENTER
to drive the Recorder
output to its minimum (normally 4 mA) and hold it there until the next
analysis is complete.
• RECMAX —Recorder signal test. Press
ENTER
to drive the Recorder
output to its maximum (normally 20 mA) and will hold it there until the next
analysis is complete.
Note: To hold the signal longer, press the
MENU
key then the
DOWN ARROW
key to
scroll to
MAINTENANCE
. Press
ENTER
then scroll down to
HOLD OUTPUTS
and press
ENTER
again.
• REC ADJUST —Press
ENTER
to modify the Recorder Minimum and
Recorder Maximum values. Use this feature to offset the 4 or 20 mA
output signal to force a chart recorder to read zero or full scale in case of
a small discrepancy. Use the
RIGHT
and
LEFT ARROW
keys to select
RECMIN
or
RECMAX
then use the
UP
and
DOWN ARROW
keys to adjust
the value. Press
ENTER
to select. Press
EXIT
to accept changes and
return to
SETUP
.
Note: The numbers on the display are A/D counts and cannot be used to
determine the recorder setting.
• RELAY TEST —Press
ENTER
to momentarily turn the relays off, then
sequentially turn on ALARM1 and ALARM 2. Automatically clears both
alarms to complete the test.
• REF *—Momentarily displays the last Reference A/D counts.
• SAMPLE *—Momentarily displays the last Sample A/D counts.
• ZERO *—Momentarily displays the last Zero A/D counts.
• CYCLE TIME *—Momentarily displays the Motor On time (in seconds).
• POWER FAIL WARNING —Sets the power fail warning to ON or OFF.
Press
ENTER
then use the
ARROW
keys to toggle between ON and OFF.
Press
ENTER
to select. Press
EXIT
to accept changes and return to
SETUP
. 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.
* These functions are used by service technicians to troubleshoot the instrument.