Ashcroft 1132 User Manual

Installation Instructions for ASHCROFT

S

PST OR SPDT

MAGNET

3/4 NPT

CONDUITPORT

AUXILIARY

SWITCH ENCLOSURE

REED SWITCH

ONE OR TWO

ADJUST

ABLE

3/4 NPT

CONDUIT

PORT

SENSING ELEMENT

PRESS UREEXTENSION

TUBE

HIGH PORT

PISTON OR DIAPHRAGM

R

ANGE

S

CALE

RANGE

SPRING

D. P. GAUGE

HOUSING

LOW

PORT

0

5

10

15

20

25

2

1

3

4

®

Explosion Proof Differential Pressure
Gauge/Switch, Variation XEK
Types 1130, 1131, 1132

For efficient working of your gauge, please read all instructions
carefully before attempting to install.

CAUTION: Do not exceed maximum operating pressure given
on the gauge label. Check fluid compatibility with wetted parts
before use.

OPERATING PRINCIPLE

Variations in pressure between high and low ports is sensed by
a piston or diaphragm sensor
the pressure difference. A primary magnet
sensor and moves with it in the same proportion. A rotary mag­net

with pointer is magnetically coupled with the primary

➂

magnet, and is situated in an isolated cavity. Movement of rotary
magnet with pointer indicates differential pressure on the dial.
Process fluids are isolated from dial case and switch enclosure.

SWITCH: An auxiliary magnet
moves with the pressure sensors. Reed switches mounted on
the extension tube are activated due to interaction between
switch contacts and field of the auxiliary magnet. Switches can
be adjusted to open or close at preset points.

Note: The gauges are calibrated to give ±2%full scale accuracy
on ascending readings.

INSTALLATION

Depressurize the system and connect the high and low pres­sure lines of your system to the “High” and “Low” ports of the
gauge, respectively.

Apply “High” and “Low” pressures simultaneously, to avoid dam­age to the internal parts. If pressure exceeds the rated maxi­mum pressure, “O” rings used on male connectors, and the
teflon seal inside the pressure chamber of piston instrument will
be damaged. In diaphragm instrument diaphragm may rupture.
If maximum operating pressure is within the allowable limit, but
the differential pressure exceeds gauge range, there will be no
damage to the gauge. Pointer will only go the extreme right end
of the scale.

which moves in proportion to

➀

situated in the tube extension

➃

is attached to the

➁

EXPLOSION PROOF SWITCH INFORMATION

Switches and electrical connections are mounted in an explosion
proof enclosure with UL, CSA, FM and CENELEC approval. The
enclosure meets Class 1, Groups B, C, D, Class 2, Groups E, F,

3

G, Class, NEMA 7 & 9 and IP66.There are two

⁄4˝ electrical

condiut connections.

PRECAUTIONS

Do not connect “High” and “Low” ports to wrong pipe ends. Do
not subject the gauge to excessive vibration.The gauge is never
to be used in an area where a magnetic field is present. It may
affect readings.

As the gauge works on magnetic coupling principal, use only
non magnetic fittings, parts etc. in areas closer than 2˝ on all
sides, otherwise calibration will be affected.

Do not try to open any part of the gauge for any reason,
because if not reassembled properly, calibration and operation
will be affected.

© 2007 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614-5145, USA, Tel: [phone], Fax: [phone], www.ashcroft.com
All sales subject to standard terms and conditions of sale. I&M008-10100-5/29 AMR 2C09/09

Load

L

(+)

N

(-)

N

(-)

R

R

B

B

Switch #1 Switch

#2

Load

L

(+)

N

(-)

R

B

Switch

#1

6

6

5

5

4

4

3

3

221

1

6

6

5

5

4

4

3

3

221

1

Installation Instructions for ASHCROFT

N

(-)

L

(+)

N

(-)

Load

Load

NC

NO

B

R

Y

6

6

5

5

4

4

3

3

221

1

N

(-)

L

(+)

N

(-)

N

(-)

Load

Load

Load

Load

N

(-)

NC

NC

NO

NO

B

R

Y

Y

B

6

6

5

5

4

4

3

3

221

1

Switch #1

Switch #1 Switch #2

®

Explosion Proof Differential Pressure
Gauge/Switch, Variation XEK
Types 1130, 1131, 1132

WITCH SETTING

S

he switches are normally factory set to save time at customer

T
end. However, they are field adjustable.

CAUTION: Supply voltage should not exceed switch rating. For
higher voltages, the use of relay circuit is recommended.

SWITCH ADJUSTMENT

The following procedure can be done by putting the gauge on a

est bench or while in service.

t

Unscrew the cover of the electrical enclosure. Knurled head set
screws are provided at bottom for setpoint adjustment .

Rotate the screw clockwise (right) to decrease the setpoint and
counter-clockwise (left) to increase the setpoint.

One or two trials may be necessary to attain the exact setpoint.

SPST SWITCH

Specifications

Contact Rating : 10 VA ac (rms) or dc (max)
Switching Current : 0.5 Amp ac (rms) or dc (max)
Switch Voltage : 100 Vac/Vdc (max)

ONE SPST SWITCH

Reed Switches and

Terminal Strip Connection

TWO SPST SWITCHES

Reed Switches and

Terminal Strip Connection

Ground Screw*

SPDT SWITCH

Specifications

Contact Rating : 3 VA ac (rms) or dc (max)
Switching Current : 0.3 Amp ac (rms) or dc (max)
Switch Voltage : 30 Vac/Vdc (max)

Terminal Strip Connection

Switch #1

Set Screws

ONE SPDT SWITCH

Reed Switches and

Switch #2

Set Screws

TWO SPDT SWITCHES

Reed Switches and

Terminal Strip Connection

R = Red; B = Black; Y = Yellow; L = Live or + Supply; N = Neutral or – Supply.

© 2007 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614-5145, USA, Tel: [phone], Fax: [phone], www.ashcroft.com
All sales subject to standard terms and conditions of sale. I&M008-10100-5/29 AMR 2C09/09

Use ground screw to ground enclosure.

*