KEYENCE AP-30 User Manual

Brown

Black or white

Blue

12 to 24 VDC

0 V

Load

SPECIFICATIONS

Two-color Digital Display
Pressure Sensor

AP-30 Series

Instruction Manual

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PART NAMES AND FUNCTIONS

AUTO key

In auto-tuning mode, use
this key to detect pres­sure. In measurement
mode, press this key for 2
seconds or more to adjust
the zero-point.

SET key

Use this key to display or
change preset values.

Output indicator 2
(Green LED)

Display unit label

Housing

■Display unit label

The AP-30 series enables you to
select the display units for pressure.
Attach the included display unit label
for the desired units at the
position in the figure.

A

Output indicator 1
(Red LED)

UP/DOWN key

Use these keys to
set output modes,
or to change preset
values or units.

Hexagonal
socket bolt

Rear metal casing
(Die-cast zinc)

■ACCESSORIES

• Instruction manual: 1

• Hexagonal-socket
port stopper: 1

• Display unit
label sheet: 1

• Quick reference
sheet: 1

Mounting
bracket A: 1

Mounting
bracket B: 1

CONNECTIONS AND INPUT/OUTPUT CIRCUIT

■Connections

• Drive current load

• Input to voltage input equipment

■Input/output circuit

• Output circuit

Over current

protection circuit

Pressure sensor main circuit

AP-31Z/32Z/33Z/34Z
(Z type only)

Input circuit (Zero-shift input)
Zero-shift input resets the display to
“0” at the rising edge of the signal.

12 to 24 VDC

3.3 k Ω
Pink



Blue

Pressure sensor

main circuit

11 kΩ

Brown

Black or white

Blue

Brown

Black
(Control output 1)
White

(Control output 2)

Blue

AP-31/32/33/34
(Except for Z type)

Analog output circuit

Pressure sensor

main circuit

Protection
circuit

12 to 24 VDC

4.7 k Ω

Load

Voltage output

0 V

12 to 24 VDC

Load

0 V

Pink

Analog
output (+)

Blue

0 V

PIPING/MOUNTING

CAUTION

CAUTION

Preset value A
Preset value b

0

ON

OFF

ON

OFF

Control output 2

(OUT 2)

Control output 1

(OUT 1)

Pressure

Preset value H

SH

SL

Preset value L

0

ON

OFF

ON

OFF

Control output 1

(OUT 1)

Control output 2

(OUT 2)

Pressure

• You can select from three
pressure port positions by
selecting or replacing the
pressure ports. Select the
optimal position based on
your location.

CAUTION

* The arrow shows the pressure port

positions that can be selected.

The maximum tightening torque for the hexagonal socket bolt is

0.3 Nm (Approx. 3 kgf•cm). To avoid breakage, do not exceed the

specified value.

• An Rc (PT) 1/8 internal thread is provided on the pressure port of
the AP-30 series. Commercially available air-pressure pipe joints or
nipples can be used.

• When connecting a joint or a plug,
use a wrench (14 mm) to hold the
metallic part as shown in the figure to
avoid a large force being applied to
the sensor housing (resin part).

• Be sure to block an unused pressure port with the hexagonal-socket
port stopper provided.

CAUTION

The maximum tightening torque for the hexagonal-socket port
stopper is 10 Nm (Approx. 100 kgf•cm). To avoid breakage, do not
exceed the specified value.

• To prevent air leaks, wrap the male screw with sealing tape.

• To mount the AP-30 series to a panel using the panel mounting

holder set (OP-31357), use a panel with 1 to 3.5 mm thickness.

Hexagonal socket bolt

Hold this part with a
wrench (14 mm).

• Special mounting brackets are
included with the AP-30 series.
Use the type of mounting bracket
appropriate for the location
where the sensor is mounted. To
mount the sensor, remove the
hexagonal socket bolts and then
retighten them through the
mounting bracket.

Hexagonal
socket bolts

The maximum tightening torque for the hexagonal socket bolt is

0.3 Nm (Approx. 3 kgf•cm). To avoid breakage, do not exceed the

specified value.

SAFETY PRECAUTIONS

Be sure to follow the instructions below to avoid malfunctions.

■Connection

• When using a commercially available switching regulator, be sure
to ground the frame ground terminals.

• Isolate the sensor’s wiring from power lines or high-voltage lines;
otherwise, the sensor may malfunction due to noise interference.

■Other

• Do not use the AP-30 series for the detection of corrosive gases
or liquid.

• Do not insert any objects, such as wires, from the pressure port.
The pressure-sensing element may break, resulting in malfunc­tions.

• Do not press the front panel keys with a pointed object.

• The AP-30 series does not have an explosion-proof structure.

Do not use it for the detection of flammable gases.

OPERATION MODE SELECTION

■Auto-tuning mode (F-1)

Using the AUTO key, detect the upper limit value (A) and the lower
limit value (b). The detection level (C) is automatically set at the
midpoint between the two values. (You can finely adjust the preset
value C within the range between A and b.)

Control output 1: The sensor turns on when the pressure exceeds the
Control output 2: The sensor turns on when the pressure goes outside

Control output 1
Control output 2

■Hysteresis mode (F-2)

Set desired detection level (H) and hysteresis (h) for the detection.
Control output 1: The sensor turns on when the pressure exceeds the

Control output 2: The sensor turns on when the pressure goes outside

Control output 1
Control output 2

preset value C.
the stability levels.

Pressure

Preset value C

(OUT 1)

OFF

(OUT 2)

OFF

SH

ON

ON

A

SL

b
0

* The stability levels are

automatically set as
shown in the following
calculations.

SH =

SL =

preset value H. When the pressure falls by the preset
value h, the sensor turns off.

the hysteresis width (H - h).

Pressure

Preset value H

H-h

ON

(OUT 1)

OFF

ON

(OUT 2)

OFF

h

0

h: Hysteresis width of
OUT1
* When h is set to a

value close to 0, if
pressure fluctuates
around the detection
point, OUT1 will
chatter.

(A + C)

2

(C + b)

2

■2-independent mode (F-3)

Set two desired detection points (A and B).
Control output 1: The sensor turns on when the pressure exceeds the

preset value A.

Control output 2: The sensor turns on when the pressure exceeds the

preset value b.

■Window mode (F-4)

Set desired upper limit value (H) and lower limit value (L).
Control output 1: The sensor turns off when the pressure goes outside

Control output 2: The sensor turns off when the pressure goes outside

Note 1: The above description shows the operation of control outputs
1 and 2 when the output selector switch is set to N.O.
When the output selector switch is set to N.C., the operation of control
outputs 1 and 2 is inverted.
Note 2: Except for OUT1 in hysteresis mode, each control output
includes an internal hysteresis of 0.5% of F.S.

of the range between the upper limit value (H) and
lower limit value (L).

of the stability levels.

* The stability levels are

automatically set as
shown in the following
calculations.

SH = H –

SL = L +

(H - L)

4

(H - L)

4

ADJUSTMENT

Press the button
for 3 seconds or
more.

■Unit Setting

Determine the desired units.

In measurement mode, press
appears first, and then the current units are displayed. Use ▲ or

to select the desired units. Pressing completes the unit

▼

setting procedure and enters operation mode selection.

dtS

isp

■Operation Mode

Determine the desired operation mode.
(➮ Refer to “OPERATION MODE SELECTION” on page 2.)

The current operation mode is displayed. Use ▲ or ▼ to select
the operation mode. Pressing completes the operation mode
setting procedure and enters N.O./N.C. selection.

1-F

3-F

■N.O./N.C. Selection

Select N.O. (normally open) or N.C. (normally closed).

The current selection of “no” (normally open) or “nc” (normally
closed) is displayed. Use ▲ or ▼ to select the desired mode.
Pressing completes the N.O./N.C. selection procedure and
enters the chattering prevention setting.

■Chattering Prevention

Determine the desired response time.

The current response time is
displayed. Use ▲ or ▼ to select
the response time. Pressing
completes the setting procedure and
enters the display color selection.

■Display Color Selection

Determine the desired LED color for numerical value display.

The current color is displayed. Use ▲ or ▼ to select the color.
Pressing completes the setting procedure and returns to the
measurement mode.

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values are automatically converted to
appropriate values for the updated units.

Press the button once.

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Press the button once.

▲

Press the button once.

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Measurement mode

▲

▲

■Preset Value Input Mode

Determine the preset values.

● Auto-tuning mode (F-1)

1. In measurement mode with the

current measured value dis­played, press . The AP-30
enters the preset value input
mode.

2. “A” and the current preset value

flash alternately.

3. Position the target at the desired

upper (lower) limit.

4. Press A to register the value.

The updated value is displayed
for 1 second.

5. “b” and the current preset value

flash alternately.

6. Position the target at the desired

lower (upper) limit.

7. Press A to register the value. The updated value is displayed for 1

second.

8. “C” and the calculated preset value C flash alternately. (You can

change the C value to any value between A and b using ▲ or ▼.)

9. Press to register the C value. The setting procedure is completed

and the unit returns to measurement mode.

* To confirm the preset value, press repeatedly.

• Example of auto-tuning mode setting: Confirmation of work

piece pick-up.

Set the upper limit (A) to the position where the work piece is taken.
Set the lower limit (b) to the position where the nozzle becomes open
after releasing the work piece. Press A to register the upper and
lower limit values. The C value is automatically set to the midpoint
between the upper and lower limit values.

■Hysteresis Mode (F-2), 2-independent Output

Mode (F-3), Window Mode (F-4)

1. In measurement mode with the

current measured value displayed,
press . The AP-30 enters the
preset value input mode.

2. “H” 1. and the current preset value

flash alternately.

3. Use ▲ or ▼ to change the value

to the desired value. Press to
register the updated H value.

4. “h” 2. and the current preset value

flash alternately.

5. Use ▲ or ▼ to change the value

to the desired value. Press to
register the updated h value.

6. “P” 3. and the shift value of the

zero-shift adjustment flash
alternately.

8. Press to complete the setting procedure and return to measure-

ment mode.

* To confirm the preset value, press repeatedly.
Note 1: In hysteresis mode, (h - F.S.) cannot be set to a value greater

than H.
Note 2: In window mode, (L + 1% of F.S.) cannot be set to a value
greater than H.

Press the button
once.

▲

(Measurement mode)

❋ ❋ ❋ ❋

Current value

• • •

❋ ❋ ❋ ❋

Current upper
(lower) limit
value A

❋ ❋ ❋ ❋

Current upper
(lower) limit
value b

❋ ❋ ❋ ❋

The set value
C displays.

A + b

(C=

2

A

A

• • •

❋ ❋ ❋ ❋

The updated value displays for 1 sec.

• • •

❋ ❋ ❋ ❋

The updated value displays for 1 sec.

• • •

Flashes
alternately

Flashes
alternately

Flashes
alternately

[Example: In hysteresis mode]

(Measurement mode)

❋ ❋ ❋ ❋

Current value

• • •

• • •

• • •

1. “A” appears in the 2-independent
output mode.

2. “b” appears in the 2-independent
output mode.
“L” appears in the window mode.

3. Shown with Z type only.

* The setting is saved

in the EEPROM.

Flashes

1.

alternately

❋ ❋ ❋ ❋

Set the desired value
using

or

Flashes

2.

alternately

❋ ❋ ❋ ❋

Set the desired value
using

or

Flashes

3.

alternately

❋ ❋ ❋ ❋

)

* The setting is saved

in the EEPROM.

●Zero-point adjustment

At normal atmospheric pressure (1 atm.), press A for at least 2
seconds in measurement mode. The display changes to “----“, then
to “0”. The zero adjustment function can be used when the
pressure is within ±5% of F.S.

Note 1: When the operation mode is changed, check the preset values in the
preset value input mode.
Note 2: When units of psi are selected with the AP-34Z, the display range
becomes 19.99 to 19.99.

Note 3: Perform the zero-shift adjustment periodically.
Note 4: The initial output voltage may fluctuate by ±1.0% immediately after the

power is turned on. To measure minute differences in pressure, let the sensor
warm up for approximately 15 to 30 minutes.

OTHER FUNCTIONS AND ERROR INDICATION

6

■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.

Zero-shift input

1 MPa

Atmospheric

pressure

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

Zero-shift input

-0.1 MPa is
acceptable.

-0.6 MPa is
not acceptable.

■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.

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■Error indications and remedies

Error indication Problem Remedy

E

Ec

Zero-point adjustment was
executed at a pressure of
±5% or more of F.S.

Overcurrent through OUT1
or 2

Perform zero-point adjustment
at normal atmospheric
pressure.

Turn power off and adjust the
load so that the current is
within the rated range.

-FFF, FFF

Applied pressure was
outside of the display

Adjust the pressure to within
the rated range.

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 pro­duced.

DIMENSIONS

AP-30 (Sensor unit)

31

33

(4)

Mounting bracket A
(Accessory)

16

22

20

19

Cable length: 2 m

ø4, 5 x 0.18 mm

25
35

30
20

2-ø3.5

14

2-ø4.5

t=1.5

2

core

8.5

31

24.5

6.5

Mounting bracket B
(Accessory)

20

19

45

Pressure port:
Rc (PT) 1/8

8.6

20

2 x M3 screw

14

20

6.5

30
20

2-ø3.5

14

20

2-ø4.5

13

45

t=1.5

When mounting bracket A is
attached

[Top view]

25

16.5

6

16

When mounting bracket B is
attached

31

45.5

20

2-ø4.5
mounting hole

31

[Side view]

31

22

t=1.6

13

t=1.

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KEYENCE CORPORATION

1-3-14, Higashi-Nakajima, Higashi-Yodogawa-ku,
Osaka, 533-8555, Japan
PHONE: [phone] FAX: [phone]

KEYENCE CORPORATION OF AMERICA

PHONE: [phone] FAX: [phone]

45

KEYENCE (UK) LIMITED

PHONE: [phone] FAX: [phone]

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PHONE: [phone] FAX: [phone]

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PHONE: [phone] FAX: [phone]

KEYENCE SINGAPORE PTE LTD

PHONE: [phone] FAX: [phone]

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PHONE: [phone] FAX: [phone]

KEYENCE (THAILAND) CO., LTD

PHONE: [phone]~4 FAX: [phone]

KEYENCE KOREA CORPORATION

PHONE: [phone] FAX: [phone]

© KEYENCE CORPORATION, 1998

Specifications are subject to change without notice.

AP3-IM-1-0398 Printed in Japan