17
SETUP
Calibration Timeout
Option: Disabled, 10, 20, 30,40,50, 60 or 70 days
The
HI764113
dissolved oxygen probe utilizes optical technology which offers significant advantages
over polarographic or galvanic type dissolved oxygen probes. Some advantages include reduced
maintenance, simplified handling and infrequent calibrations. However if a user wishes to validate or
calibrate on a SOP schedule, a timer may be set as a reminder.
The
Calibration time out
parameter can be set from 10 to 70 days or can be disabled.
The meter is provided with a real time clock (RTC) and is used to monitor the time elapsed since the
last DO calibration.
The calibration timer is reset every time the meter is calibrated and the “CAL DUE” status is triggered
when the meter detects a calibration time out. The “CAL DUE” tags will start blinking to warn the user
that the meter should be recalibrated.
If the calibration timeout is changed (e.g. to 20 days), then the timer will be immediately reset.
Notes:
Before the DO calibration is cleared (default values loaded) the display always shows the
“CAL DUE”.
Before an abnormal condition in the RTC is detected, the meter forces the “CAL DUE” status.
After a user temperature or pressure calibration is made (or cleared), the “CAL DUE” message
will be activated.
Press
SETUP
key.
Highlight
Calibration timeout
.
Press
Modify
.
Use the / keys to set the desired value.
Press
Accept
to confirm or
ESC
to return without saving.
Note:
If enabled, a ”CAL DUE” warning will be shown on the display after the Calibration timeout
period has expired.