Ashcroft Instruments 1130 - Differential Pressure Gauge

Ashcroft Instruments 1130 - Differential Pressure Gauge
Installation Instructions for
ASHCROFT® Model 1130
Differential Pressure Gauge/Switch
2
3
range, there will be no damage to the gauge. The pointer will
only go to the extreme right end of the scale.
4
1
5
0
SWITCH
(OPTIONAL)
RANGE SPRING
HIGH PRESS.
PORT
LOW PRESS.
PORT
PISTON MAGNET
PISTON
TEFLON® SEAL
ROTARY MAGNET
POINTER
PRECAUTIONS
Do not connect “High” and “Low” ports to the 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 show the wrong readings.
As the gauge works on a magnetic coupling principle, use only
non-magnetic fittings, parts, etc. in areas closer than 2˝ on all
sides, otherwise calibration will be affected. Panel mounted
gauges should be installed in non-ferrous panel material.
However, gauges with 2˝ and 2.5˝ dials, mounted in steel
panels, may require pointer adjustment. This is done by the
manufacturer, upon request.
Model 1130
Piston
Do not try to open any part of the gauge for any reason, because if not reassembled properly calibration will be affected.
For efficient working of your gauge, please read all instructions
carefully before attempting to install.
SWITCH SETTING
Please follow these instructions when your differential pressure
gauges are supplied with a switch. The switches are normally
factory set to save time the customer time. However, they are
field adjustable.
CAUTION: Do not exceed maximum operating pressure given
on the gauge label. Check fluid compatibility with wetted parts
before use. Minor leakage past the Teflon seal is possible.
“High” and low media must be compatible.
OPERATING PRINCIPLE
High and Low pressures are separated by a sensor assembly
consisting of a magnet, diaphragm and a range spring. The
difference in pressure causes the sensor assembly to move in
proportion to the change against a range spring.
A rotary magnet, located in a separate body compartment and
isolated from the acting pressures is rotated by a magnetic
coupling following the linear movement of the sensor assembly. A pointer attached to the rotary magnet indicates differential pressure on the dial.
CAUTION: Supply voltage should not exceed switch rating. For
higher supply, use of relay circuit is recommended.
SWITCH ADJUSTMENT
The following procedure must be done by putting the gauge on
a test bench or while in actual service. The switch adjustment
screw is located on the plastic cover. Rotate the screw anticlockwise to increase the setpoint and clockwise to decrease
the setpoint. One or two trials may be necessary to attain the
exact setpoint.
(1) 6000 psi for stainless steel
*Teflon TM of duPont
SWITCH: Reed switches (optional) are located adjacent to the
pressure chamber and are activated by the magnetic field of
the sensor assembly.
Note: The gauges are calibrated to give ±2% full scale accuracy on ascending readings.
INSTALLATION
For better performance the gauge should be mounted horizontally with the dial vertical. Depressurize the system and connect the high and low pressure lines of your system to the
“High” and “Low” ports of the gauge, respectively.
It is recommended to use “O” rings with male connectors to
avoid excessive tightening and to prevent leakage (for parallel
threads). The gauge is now ready for operation. Apply “High”
and “Low” pressures simultaneously, to avoid damage to the
internal parts.
Increase setpoint
anti-clockwise
View from high pressure side
Model 1130 consists of a piston type mechanism to sense the
pressure difference. It can withstand maximum operating pressure up to 3000 psi for all ranges(1). If pressure exceeds the
rated maximum pressure, “O” rings used on male connectors,
and the Teflon seal inside the pressure chamber, will be damaged. If maximum operating pressure is within the allowable
limit of 3000 psi(1), but the differential pressure exceeds gauge
Tel: +44 (0)191 490 1547
Fax: +44 (0)191 477 5371
© Ashcroft Inc., 250 East Main Street, Stratford, CT 06614-5145, USA, Tel: 203-378-8281, Fax: 203-385-0357, www.ashcroft.com
northernsales@thorneandderrick.co.uk
All sales subject to standard terms and conditions of sale. I&M008-10089-12/01 Email:
AMR 2C09/09
Website: www.heattracing.co.uk
www.thorneanderrick.co.uk
Installation Instructions for
ASHCROFT® Model 1130
Differential Pressure Gauge/Switch
SPST SWITCH
SPDT 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)
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)
ONE SPST SWITCH
TWO SPST SWITCHES
ONE SPDT SWITCH
TWO SPDT SWITCHES
Reed Switches and
Terminal Strip Connection
Reed Switches and
Terminal Strip Connection
Reed Switches and
Terminal Strip Connection
Reed Switches and
Terminal Strip Connection
Switch #1
Switch #1 Switch #2
R
R
B
R
B
Switch #1 Switch #2
Switch #1
B
R B
R B
Y
Y
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
Load
L N
N
(+) (-)
(-)
L N
(+) (-)
L N N
(+) (-) (-)
L N N
(+) (-) (-)
Reed Switches and
DIN Plug Connection
Reed Switches and
DIN Plug Connection
Reed Switches and
DIN Plug Connection
View of socket for supply connections
View of socket for supply connections
View of socket for supply connections
E
L or (+)
N or (-)
E
L or (+)
2
1
3
Load
1
N or (-)
3
3
Load for
Switch #2
View of plug after removing the socket
N or (-)
2
B
3
E
SPST
Switch
2
1
Switch #1
Switch #2
B
Load
View of plug after removing the socket
R
R = Red; B = Black; Y = Yellow; L = Live or + Supply; N = Neutral or – Supply.
B
E
1
2
3
3
R
NC NO
N or (-)
B
E
2
1
Load for
Switch #1
View of plug after removing the socket
N N
(-) (-)
E
L or (+)
2
N or (-)
NC
1
NO
6
Load
5
Load
4
NC
3
NO
2
Load
1
Load
6
NC
5
NO
4
Load
3
Load
2
Load
1
B
Y
1
R
Y
SPDT
Switch
*Body to be suitably grounded while using gauge + switch and only switch.
Tel: +44 (0)191 490 1547
Fax: +44 (0)191 477 5371
Email: northernsales@thorneandderrick.co.uk
Website: www.heattracing.co.uk
www.thorneanderrick.co.uk
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