User Guide

22
OTHER FEATURES
LCD BACKLIGHT
The LCD can be illuminated to allow the user to see the readings even
in dark environments. This feature can be enabled/disabled pressing
the ALT and LIGHT keys. If the LCD backlight feature is enabled, the
LCD remains illuminated until the feature is disabled pressing the ALT
and LIGHT keys. The LCD backlight can be disabled in order to save
power and it is automatically disabled when battery charge weakens.
Note: When an external power supply is connected to the instrument,
the backlight is not automatically enabled.
Note: When LOBAT appears on LCD it is not possible to enable
backlight. If the user attempts to enable the LCD backlight in
low battery condition, the meter will show "batt" on LCD.
Real Time Clock (RTC)
The instrument has an internal Real Time Clock (RTC) circuit with a
backup lithium battery. This allows the meter to update time and date
even when both batteries and external power adapter are discon-
nected.
GOOD LABORATORY PRACTICE (GLP)
GLP is a set of functions that allows the storage or retrieval (when
necessary) of data regarding the maintenance and status of the meter.
LAST CALIBRATION DATE
Last calibration date is stored automatically after a successful calibra-
tion. The last calibration date can be displayed through setup code 10
(see "SETUP MODE" paragraph).
CALIBRATION ALARM TIME-OUT
The meter checks if the time-out time, fixed at 1 year, has expired
every time it is turned on. It is possible to enable/disable this feature
through setup code 11. The default value is "0n".
If the time has expired, the message "Cal
date" scrolls across the LCD. The "DATE" sym-
bol will blink to remind to the user to perform
a new calibration soon.
Note: The alarm time-out is based on thermocouple calibration only.
GLP AND RS232 (HI98801 and HI98804 only)
GLP data (ID code and last calibration date) can be retrieved from a PC
through the RS232 communication feature (see "Data transfer to PC").