21
20
* 1 FTU = 1 NTU
Batteries are too weak to
ensure reliable measure-
ments. This message ap-
pears for a few seconds,
then the meter will auto-
matically switch off. Bat-
teries must be replaced
immediately.
* 1 FTU = 1 NTU
LCD AND ERROR MESSAGES
HI 93703 will display several different LCD
messages to help the user throughout all opera-
tions.
The meter is in a ready state
and measurement or calibra-
tion can be performed.
Calibration mode is active.
If the CAL key is not pressed
within 6 seconds, the meter
will automatically switch to
the measurement mode.
Calibration date setting
mode is active.
0 FTU* standard for calibra-
tion is required.
Calibration is in progress.
10 FTU* standard for cali-
bration is required.
Last calibration date
(MM.DD).
"Sample In Progress":
measurement is being per-
formed.
Low battery: when this mes-
sage appears, the instru-
ment can still perform
approx. 50 measurements.