2
Operation
The HH4-PH digital pH meter is operated by pressing the on/off button. The following
display sequence is executed during startup:
8.8.8.8
Display check
AIC
Company name
PH
X.X
Software version number
This sequence will take around eight seconds then the display will indicate the current
pH value. If a millivolt or temperature reading is required, press the “pH/mV/Temp” keypad to
obtain the required reading. The display may be cycled through “mV”, “temp” and “pH” by
successively pressing the keypad. The current display may be held (frozen) at any time simply
by pressing the “Cal/Hold” keypad.
Note: When the “Cal/Hold” keypad is pressed the display will indicate “Hold” and then
hold the current reading, if the “Cal/Hold” keypad is pressed again the display will indicate
LIUE
and the display will be released from hold.
The instrument features an automatic turn off function and will automatically power
down after a predetermined number of minutes (note: see chapter on setting up the instrument).
This feature is ideal for saving power, when the instrument is accidentally left turned on. The
automatic turn off function, may be disabled by selecting “0" minutes when setting up the
instrument.
2 .1
Read this first
Your new HH4-PH has been supplied factory configured (unless otherwise specified),
as follows:
Manual Temperature:
Set to 25
o
C
Temperature units:
Set to
o
C
Auto turn off:
Set to 10 minutes
Digital filter:
Set to 3 (range 0 to 8, 8=max)
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HH4PHMAN-1.0-2