KEYENCE AP-30 Series - Manual (Page 4)

Applied pressure was
outside of the display
range.
Zero-point adjustment was
executed at a pressure of
± 5% or more of F.S.
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© KEYENCE CORPORATION, 1998
AP3-IM-1-0398 Printed in Japan
Specifications are subject to change without notice.
OTHER FUNCTIONS AND ERROR INDICATION
■ Peak-hold/bottom-hold display function
The AP-30 series internally updates the peak-hold and bottom-hold
values at all times.
● To display hold values
• While ▲ is held down in measurement mode, the peak-hold value
is displayed.
• While ▼ is held down in measurement mode, the bottom-hold value
is displayed.
● To reset the peak-hold and bottom-hold values
• Hold down ▲ and press ▼ in measurement mode.
● The peak-hold and bottom-hold values are also reset using the
following procedure.
• Turn the power off.
• Press
for 3 seconds or more and change any settings.
Note: The hold values cannot be displayed when the front panel keys
are locked with the key protection function. Disable the function before
displaying the hold values.
■ Analog output function (Except for Z type)
The voltage value according to the pressure value is output.
■ Error indications and remedies
■ Zero-shift function (Z type only)
The zero-shift function is used to reset the current pressure value to
“0” using an external signal input, in order to prevent measurements
from being affected by fluctuations in base pressure.
Example: Leakage test
Input a zero-shift value after air supply is completed so that air leakage
after a specified time is displayed as a negative value. The AP-30’s
detection is unaffected by fluctuations in air supply volume.
When the power is turned off, the value updated after the zero-shift
input (zero-shift value) is lost.
Note 1: The zero-shift function cannot be used in auto-tuning mode.
Note 2: The zero-shift input is effective when the current pressure is
between -3% of F.S. and F.S. for a shift of 0 (P = 0).
Note 3: If the applied pressure is outside the range of -15% to 110% of
the rated pressure, “
-FFF ” or “ FFF ” appears.
■ Key protection function
The key protection function is used to lock the front panel key in order
to prevent preset values from being accidentally changed.
To enable the key protection function, hold down A and press ▲ .
“ Loc ” flashes for 2 seconds and the keys are locked.
To disable the key protection function, again hold down A and press
▼ . “ unL ” flashes for 2 seconds and the keys are unlocked.
Using the EEPROM, the AP-30 series can retain the preset values
even if the power is turned off.
■ Display color selection
You can set the color of the LED display either to the two-color mode
which displays the numerical value in green or red according to OUT1,
or to the single color mode which always shows the value in red. The
two-color display allows you to check the output condition at a glance.
(Refer to “ADJUSTMENT” on page 3 for the setting procedure.)
In two-color mode (Regardless of N.O./N.C. selection)
• When OUT1 is turned on: Red
• When OUT1 is turned off: Green
l e d o M V 5 o t V 1
1 3 - P A a P k 3 . 1 0 1 - o t 0
2 3 - P A a P k 0 . 0 0 1 + o t 0
3 3 - P A a P M 0 0 0 . 1 + o t 0
4 3 - P A a P k 3 . 1 0 1 - o t 3 . 1 0 1 +
Error indication Problem Remedy
E
Ec
-FFF, FFF
Perform zero-point adjustment
at normal atmospheric
pressure.
Turn power off and adjust the
load so that the current is
within the rated range.
Adjust the pressure to within
the rated range.
■ N.O./N.C. selection
The N.O. or N.C. output can be selected according to the device’s
control method. When the output status is changed, the color of the
numerical value display LED is inverted.
■ Chattering prevention function
The chattering prevention function is used to prevent outputs from
chattering by changing the response time. The response time can be
selected from 4 settings. When the detection (non-detection) state
continues for more than a preset response time, the output is pro-
duced.
DIMENSIONS
AP-30 (Sensor unit)
24.5
6.5
31
(4)
33
8.5 31 14
20
16.5
6.5
20
Cable length: 2 m
Pressure port:
Rc (PT) 1/8
2 x M3 screw
ø4, 5 x 0.18 mm 2 core
Mounting bracket A
(Accessory)
t=1.5
2-ш4.5
2-ш3.5
45
14
20
30
25
16
22
35
19
20
Mounting bracket B
(Accessory)
t=1.5 2-ш4.5
2-ш3.5
14
20
20
13
30
45
8.6 19
20
When mounting bracket A is
attached
t=1.6
2-ø4.5
mounting hole
25
6
16
22 31
45
[Top view]
[Side view]
When mounting bracket B is
attached
t=1.6
31
20
45.5
13 31
1 MPa
Atmospheric
pressure
Zero-shift input
Zero-shift input
-0.1 MPa is
acceptable.
-0.6 MPa is
not acceptable.
Overcurrent through OUT1
or 2