From measurement mode
1.
Press Setup key
to enter Set Up mode.
2.
Press the
▲
and
▼
keys
to scroll through
subgroups until you view parameter P4.0.
See figure
3.
Press the ENTER key
twice to select
parameter 4.2.
See figure
4.
Press the
▲
and
▼
keys
to select 2, 3, 4, or
5 point pH calibration.
5.
Press the ENTER key
to confirm selection
and to return to the subgroup menu.
Press the CAL/MEAS key to return to
measurement mode.
From measurement mode
1.
Press Setup key
to enter Set Up mode.
2.
Press the
▲
and
▼
keys
to scroll through
subgroups until you view parameter P4.0.
See figure
3.
Press the ENTER key
to select
parameter 4.1.
See figure
4.
Press the
▲
and
▼
keys
to select the
configuration you require.
•OFF switches the READY indicator off.
•ON switches the READY indicator on.
• AP72 meter only: ON and HOLD
together switches the auto endpoint
feature on.
5.
Press the ENTER key
to confirm selection
and to proceed to step 4 of P.4.2. Press the
CAL/MEAS key to return to measurement
mode.
Notes
Meter default is set for Ready indicator on, and
auto endpoint function off.
33
32
P4.0: Unit configuration
P4.1: READY indicator and auto endpoint function
Program P4.1 lets you select “READY indicator on” to indicate when the reading is
stable*, or select “READY indicator off” for faster meter response.
AP72 meter only: Program P4.1 also lets you switch the Auto endpoint function on
or off. Select auto endpoint on to “hold” the reading when it is stable for more than
5 seconds. The display automatically freezes, and the HOLD indicator appears on
the left side of the display. Press the HOLD key to release the display and access
other functions. Select auto endpoint off to deactivate this feature.
8.5
A
A
B
B
C
C
D
D
P4.2: Selecting number of pH calibration points
Program P4.2 lets you select the number of calibration points that appear in pH
calibration mode: 2, 3, 4, or 5. This lets the meter scroll through the calibration points
more quickly if you regularly calibrate at less than 5 points.
*The READY indicator appears and the reading holds until the measured value exceeds the tolerance
(± 0.02 pH; ± 0.8 mV <400; ±1.2 mV >400). Then, the READY annunciator turns off.
Summary of Contents for AP71
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