User Guide

33
Note At any time pressing the DISPLAY key or (ALT+) SETUP keys
the meter will return to the regular operating display.
• Press the  or  key to view the
time of last calibration. The second-
ary display will show “HOU” to
indicate “hour and minute” while the
primary LCD will show the time as
HH:mm format.
• Press the  or  key again to view
the offset in mV at the time of last
calibration. The secondary display
will show “OFF” to indicate “offset”.
• Press the  or  key again to view
the slope in mV/pH at the time of
last calibration. The secondary dis-
play will show “SLO” to indicate
“slope”.
• Press the  or  key again to view
the first memorized buffer at the time
of last calibration. The secondary
display will show “BUF1” to indicate
“first buffer”.
• Press the  or  key again to view
the second memorized buffer (if
present) at the time of last calibra-
tion. The secondary display will show
“BUF2” to indicate “second buffer”.
• Press the  or  key again to re-
turn to the first CAL DATA display
(date) at the time of last calibration.
Note The true calibration date and time are available only when
using the HI 504920 meter. If the calibration is performed
through the HI 504910 internal keyboard and LCD, the
calibration date and time will be set to the default values 1/
1/2002 00:00 : in this case disable the calibration time-
out in HI 504.