Brooks Instrument GT1000 User Manual
Installation and Operation Manual
X-VA-GT1000-eng
Part Number: 541B078AAG
March, 2014
Brooks® GT1000
Industrial Glass Tube Variable Area Flowmeter
GT1000 Series
Model GT1020
Model GT1024
GT1000 Series
Installation and Operation Manual
X-VA-GT1000-eng
Part Number: 541B078AAG
March, 2014
Installation and Operation Manual
X-VA-GT1000-eng
Part Number: 541B078AAG
March, 2014
GT1000 Series
WARNING
GLASS TUBE
EXPLOSION
HAZARD
Plastic protective sleeve must remain over glass
tube. (Meter sizes 7 -13 only)
Fasten meter windows securely.
Do not operate above pressure and temperature
limits.
Avoid pressure and flow surges.
Do not service or repair while pressurized.
Read and understand instruction manual.
Failure to comply could result in serious personal
injury or property damage.
WARNING
GLASS TUBE EXPLOSION HAZARD
Protective sleeve
(Meter sizes 7 - 13 only)
Fasten meter windows securely.
Failure to comply could result in serious personal
injury or property damage.
must
remain
over
glass
tube.
Installation and Operation Manual
X-VA-GT1000-eng
Part Number: 541B078AAG
GT1000 Series
Dear Customer ,
We appreciate this opportunity to service your flow measurement and control requirements with a Brooks
Instrument device. Every day, flow customers all over the world turn to Brooks Instrument for solutions to their
gas and liquid low-flow applications. Brooks provides an array of flow measurement and control products for
various industries from biopharmaceuticals, oil and gas, fuel cell research and chemicals, to medical devices,
analytical instrumentation, semiconductor manufacturing, and more.
The Brooks product you have just received is of the highest quality available, offering superior performance,
reliability and value to the user. It is designed with the ever changing process conditions, accuracy requirements
and hostile process environments in mind to provide you with a lifetime of dependable service.
We recommend that you read this manual in its entirety. Should you require any additional information concerning
Brooks products and services, please contact your local Brooks Sales and Service Office listed on the back cover
of this manual or visit www.BrooksInstrument.com
Y ours sincerely ,
Brooks Instrument
March, 2014
ContentsInstallation and Operation Manual
X-VA-GT1000-eng
Part Number: 541B078AAG
March, 2014
Paragraph Page
Number Number
Section 1 Introduction
1-1 Description .......................................................................................................................................... 1-1
1-2 Principle of Operation.......................................................................................................................... 1-1
1-3 Specifications ...................................................................................................................................... 1-2
1-4 Optional Equipment - Alarms & Valves................................................................................................ 1-6
Section 2 Installation
2-1 General................................................................................................................................................ 2-1
2-2 Receipt of Equipment .......................................................................................................................... 2-1
2-3 Recommended S torage Practice......................................................................................................... 2-1
2-4 Return Shipment ................................................................................................................................. 2-2
2-5 Transit precautions .............................................................................................................................. 2-2
2-6 Installation ...........................................................................................................................................2-2
Section 3 Operation
3-1 Pre-Operational Check........................................................................................................................ 3-1
3-2 Operating Instructions ......................................................................................................................... 3-1
GT1000 Series
Section 4 Maintenance
4-1 Overview ............................................................................................................................................. 4-1
4-2 Cleaning ..............................................................................................................................................4-2
Section 5 Parts Assembly
5-1 General................................................................................................................................................ 5-1
Section A Safety Instructions
A-1 Safety Instructions............................................................................................................................... A-1
Warranty , Local Sales/Service Contact Information....................................................................... Back Cover
i
Contents
GT1000 Series
Figures
Figure Page
Number Number
1-1 Principle of Operation.......................................................................................................................... 1-1
1-2 Cross-Section - GT1000 Flow Tubes with Rib Guides ........................................................................ 1-2
1-3 GT1000 Floats (Descriptions refer to floats used in the same size tube))........................................... 1-2
1-4 GT1000 Family: NPT, Flanged and w/AlarmOptions ........................................................................... 1-8
1-5 Alarm Switch(es) for GT1000 Sizes 7-13 ........................................................................................... 1-10
1-6 Dimensions and Specs, Intrinsically Safe Switch Isolators................................................................. 1-11
1-7 Alarm Wiring Diagram, Reed Switch & Inductive Alarm with Agency Approved Power Supply/Relay
Isolator Alarm Wiring Diagram, Reed Switch with Customer Supplied Barrier................................... 1-12
2-1 T ypical Flowmeter Piping Configuration ..............................................................................................2-3
3-1 T ypical Flowmeter Piping Configuration ..............................................................................................3-2
5-1 GT1000, Sizes 2 and 6 Parts Assembly Drawing ................................................................................ 5-1
5-2 GT1000, Sizes 7-10 Parts Assembly Drawing..................................................................................... 5-2
5-3 GT1000, Sizes 12 and 13 Parts Assembly Drawing ............................................................................ 5- 3
Installation and Operation Manual
X-VA-GT1000-eng
Part Number: 541B078AAG
March, 2014
Tables
Table Page
Number Number
1-1 Specifications - GT1000 ...................................................................................................................... 1-3
1-2 GT1000 Pressure Ratings and PED Categories ................................................................................. 1-3
1-3 Capacities and Pressure Drop Meter Sizes 2 & 6: S pherical Floats .................................................... 1-4
1-4 Capacities and Pressure Drop Meter Sizes 7, 8, 9, 10, 12 & 13: 200mm, 250mm Scale, Rib Guided
Tubes, Standard Floats ................................................................................................................... 1-4
1-5 Capacities and Pressure Drop Meter Sizes 2 thru 13: 127mm, 200mm, 250mm Scale, Rib Guided
Tubes, Alarm Floats ........................................................................................................................ 1-5
1-6 Data 10&15-14-N3 Inductive Coils ...................................................................................................... 1-9
5-1 Parts Assembly Item Identification....................................................................................................... 5-4
ii
Installation and Operation Manual
X-VA-GT1000-eng
Part Number: 541B078AAG
March, 2014
1-1 Description
1-2 Principle of Operation
Section 1 Introduction
GT1000 Series
The Brooks® GT1000 combines ruggedness and simplicity in design to
provide a versatile glass tube flowmeter suitable for a wide range of
applications. The GT1000 O-ring construction minimizes process downtime
by allowing for convenient in-line removal of the glass tube for cleaning and
maintenance.
The operating parts of the flowmeter consist of a tapered glass tube and a
float which operates within the tube. The fluid enters the bottom of the tube,
which has the smallest inside diameter (and smallest area), and exits from
the top, which has the largest inside diameter (and largest area). The float is
free to operate between the largest and smallest areas of the tube.
Refer to Figure 1-1.
As the float moves up and down within the tapered tube, the annular area
between the float and tube varies (area increases as the float rises). This
gives the generic name of "variable area meter" for this measurement
principle. As the flow varies, the float will move within the tube until it reaches
an equilibrium position, where the tube taper creates an appropriate annular
area to balance the forces of gravity and the fluids acting on the float.
Refer to Figure 1-2.
There are four types of floats available for the GT 1000 flowmeter.
Refer to Figure 1-3.
Guide ribs are formed into the tube to keep the float operating in the center
of the tube. The guide ribs do not follow the taper of the tube. They are
parallel to the tube centerline so that the proper operating clearance for the
float is maintained for its entire range of travel. The increasing annular area
of the tube is in the area between the ribs.
Refer to Figure 1-2.
Figure 1-1 Principle of Operation
1-1
Section 1 Introduction
GT1000 Series
Figure 1-2 Cross-Section - GT1000 Flow Tubes with Rib Guides
Installation and Operation Manual
X-VA-GT1000-eng
Part Number: 541B078AAG
March, 2014
Figure 1-3 GT1000 Floats (Descriptions refer to floats used in the same size tube)
1-3 Specifications
1-2
Installation and Operation Manual
Section 1 Introduction
X-VA-GT1000-eng
Part Number: 541B078AAG
March, 2014
Table 1-1 Specifications - GT1000
Capacities and Pressure DropsCapacities and Pressure Drops
Capacities and Pressure Drops See Capacities and Pressure Drop Tables 1-3, 1-4 and 1-5
Capacities and Pressure DropsCapacities and Pressure Drops
Flow Flow
AccurAccur
Flow
Flow Flow
RepeatabilityRepeatability
Repeatability ≤ 0.5% Full Scale
RepeatabilityRepeatability
Pressure Ratings/PED CategoriesPressure Ratings/PED Categories
Pressure Ratings/PED Categories See Pressure Ratings/PED Categories Table 1-2 for maximum non-shock pressure
Pressure Ratings/PED CategoriesPressure Ratings/PED Categories
ScalesScales
Scales Single or dual detachable aluminum plate
ScalesScales
Ambient Temperature LimitsAmbient Temperature Limits
Ambient Temperature Limits 33 to 125°F (1°C to 52°C)
Ambient Temperature LimitsAmbient Temperature Limits
Operating Fluid Temperature LimitsOperating Fluid Temperature Limits
Operating Fluid Temperature Limits Maximum: 250°F (121°C)
Operating Fluid Temperature LimitsOperating Fluid Temperature Limits
(Meter)(Meter)
(Meter) Minimum: 33°F (1°C)
(Meter)(Meter)
Operating Fluid Temperature LimitsOperating Fluid Temperature Limits
Operating Fluid Temperature Limits Maximum: 250°F (121°C) - Reed Switch
Operating Fluid Temperature LimitsOperating Fluid Temperature Limits
(Alarms)(Alarms)
(Alarms) Maximum: 167°F (75°C) - Inductive Switch
(Alarms)(Alarms)
DimensionsDimensions
Dimensions See Dimensions Figure 1-4
DimensionsDimensions
Materials of ConstructionMaterials of Construction
Materials of Construction
Materials of ConstructionMaterials of Construction
Connection OrientationConnection Orientation
Connection Orientation Vertical or horizontal on inlet and/or outlet
Connection OrientationConnection Orientation
CertificationsCertifications
Certifications Declaration of Compliance 2.1
CertificationsCertifications
acyacy
Accur
acy Standard: ±2% Full Scale, Class 2.5 acc VDI/VDE
AccurAccur
acyacy
Metering TubeMetering Tube
Metering Tube Borosilicate glass
Metering TubeMetering Tube
WindowWindow
Window Polycarbonate with UV inhibitor
WindowWindow
FloatsFloats
Floats Size 2 and 6: Sapphire, glass, Carboloy®, 316 stainless steel
FloatsFloats
Float StopsFloat Stops
Float Stops Size 2, 6, 12 and 13: Teflon
Float StopsFloat Stops
HousingHousing
Housing Cast Aluminum with Epoxy paint
HousingHousing
End FittingsEnd Fittings
End Fittings Brass or 316/316L stainless steel (1.4404)
End FittingsEnd Fittings
O-ringsO-rings
O-rings Viton® fluoroelastomers, Buna-N, Kalrez® perfluoroelastomers (Stainless steel body only), EPDM (Stainless steel body only)
O-ringsO-rings
HardwareHardware
Hardware Stainless steel
HardwareHardware
ConnectionsConnections
Connections Brass or stainless steel fittings: NPT or BSPT/RC female connections
ConnectionsConnections
Optional: ±1% Full Scale, Class 1.6 acc VDI/VDE
Nominal Lengths: 127mm, 200mm and 250mm
Graduations: Choice of direct reading units, millimeter or percentage of maximum flow with factor tag
Minimum: 33°F (1°C) - Reed Switch/Inductive Switch
Size 7: Glass, 316 stainless steel
Sizes 8-13: 316 stainless steel
Size 7, 8, 9 and 10: 316 stainless steel springs
Stainless steel fittings: 150 lbs. flanges per ANSI B 16.5
International Calibration Certificate
Declaration of Compliance 2.1 Pressure Test
Hazardous Location Certificate
Material Certification to DIN 3.1
Declaration of Compliance 2.1 Oxygen Service
®
GT1000 Series
Table 1-2 GT1000 Pressure Ratings and PED Categories
Maximum Operating Pressure (PSIG/bar) at Fluid Temperature: Up to 250°F (121°C)
Meter NPT ANSI 150# RF PED
Size Threaded Connections Flanged Connections Category
2 500/34.5 240/16.5 SEP
6 450/31 240/16.5 SEP
7 300/20.7 240/16.5 SEP
8 250/17 240/16.5 SEP
9 200/13.8 200/13.8 SEP
10 175/12.1 175/12.1 SEP
12 100/6.9 100/6.9 See Note
13 75/5.2 75/5.2 See Note
Note: Size 12 and 13 do not conform to Pressure Equipment Directive 97/23/EC,
therefore cannot be sold or used in the EU/EFTA.
1-3
Section 1 Introduction
*****riAretaW
Flow Rate Pressure Drop V. I. C.** Flow Rate Pressure Drop REQ. REQ.
TUBE FLOAT GPM l/h INCHES W.C. kPa cSt SCFM m3n/h INCHES W.C. kPa psi (*) bar(*)
Size 7 GLASS 0.16 36 2.0 0.5 1.0 0.88 1.4 2.0 0.5 0 0
R-7M-25-1FT 316 SS 0.38 86 3.0 0.75 1.0 1.6 2.6 4.0 1 0 0
8-RV-3 0.77 170 3.0 0.75 2.0 3.1 5.0 3.0 0.75 0 0
8-RV-8 1.0 240 5.0 1.3 3.7 4.4 7.0 5.0 1.3 0 0
Size 8 8-RS-8 1.3 310 6.0 1.5 1.8 5.8 9.2 6.0 1.5 0 0
8-8M-25-4FT 8-RS-14 1.8 410 10 2.5 1.9 7.5 11 11 2.8 0 0
8-RV-14 1.4 320 8.0 2 5.4 5.8 9.2 8.0 2 0 0
8-RV-31 2.0 460 16 4 7.0 8.3 13 17 4.3 30 2
8-RS-31 2.5 580 20 5 3.1 10 16 22 5.5 30 2
8-LJ-48 **** 4.8 1100 52 13 1.0 20 33 57 14 30 2
9-RV-33 2.5 570 6.0 1.5 11 10 16 7.0 1.8 0 0
Size 9 9-RS-33 3.2 730 4.0 1 2.4 13 21 8.0 2.0 0 0
R-9M-25-3FT 9-RV-87 3.9 890 14 3.5 17 16 26 16 4.0 30 2
9-RS-87 5.1 1100 18 4.5 3.5 21 35 19 4.8 30 2
10-RV-64 6.2 1400 12 3 15 25 40 14 3.5 0 0
Size 10 10-RS-64 7.8 1700 16 4 3.7 32 50 18 4.5 0 0
R-10M-25-3FT 10-RS-138 1
0 2400 30 7.5 5.5 46 76 36 9 30 2
10-LJ-238 **** 20 4600 104 26 1.0 92 150 16 4 30 2
12-RV-119 13 2900 4.0 1 30 56 88 4.0 1 0 0
Size 12 12-RV-221 17 3900 10 2.5 32 70 110 12 3 0 0
R-12M-20-5FT 12-RV-343 20 4700 16 4 24 86 140 20 5 30 2
12-HF-455 **** 42 9700 30 7.5 10 170 280 32 8 30 2
13-RV-510 31 7200 26 6.5 40 130 200 28 7 0 0
Size 13 13-RS-510 42 9600 36 9 20 170 270 40 10 0 0
R-13M-20-3FT 13-HF-758 **** 62 14000 40 10 12 270 440 44 11 30 2
13-LJ-1394 **** 98 22000 200 50 1.0 NOT INTENDED FOR GAS SERVICE
(*) Minimum operating downstream pressure for gas service in PSIG.
(**) Viscosity immunity ceiling listed is for stainless steel float, fluid specific gravity 1.0. When the viscosity of the fluid exceeds the viscosity immunity
ceiling (VIC), a calculated correction is applied to account for the difference between factory calibration fluid and proc
ess fluid.
(****) Extended range - nonviscosity compensating floats.
(*****) Air flow rates in standard units are at 70'F and 14.7 PSIA, air flow rates in normal units are at 1.013 bar & 20'C
Installation and Operation Manual
X-VA-GT1000-eng
Part Number: 541B078AAG
GT1000 Series
Table 1-3 Capacities and Pressure Drop Meter Sizes 2 & 6: Spherical Floats
*RIARETAW
**.C .I .VetaR wolFLACIREHPS
TUBE FLOAT cc/min. l/h Inches WC kPa cSt slpm m3/nh Inches WC kPa
GLASS 0.42 0.025 0.3 0.08 1.0 0.039 0.0021 0.3 0.08
SIZE 2 SAPPHIRE 0.84 0.05 0.4 0.09 1.0 0.06 0.0033 0.4 0.1
R-2-127-AAAAT 316 SS 1.9 0.11 0.7 0.17 1.0 0.11 0.0066 0.8 0.19
CARBOLOY 3.9 0.23 1.1 0.27 1.0 0.2 0.011 1.2 0.3
GLASS 4.2 0.25 0.3 0.08 1.0 0.3 0.016 0.3 0.08
SIZE 2 SAPPHIRE 8.0 0.48 0.4 0.1 1.0 0.41 0.023 0.4 0.11
R-2-127-DT 316 SS 16 0.98 0.9 0.22 1.0 0.68 0.038 1.0 0.24
CARBOLOY 27 1.6 1.5 0.38 1.0 1.0 0.057 1.7 0.42
GLASS 47 2.8 0.6 0.16 1.0 2.0 0.11 0.7 0.18
SIZE 2 SAPPHIRE 71 4.2 0.8 0.21 1.0 2.7 0.15 0.9 0.23
R-2-127-BT 316 SS 110 7.1 1.8 0.45 1.0 4.1 0.23 2.0 0.51
CARBOLOY 170 10 3.0 0.75 1.0 5.9 0.33 3.3 0.83
GLASS 160 10 1.8 0.45 1.0 7.3 0.4 2.0 0.5
SIZE 6 SAPPHIRE 240 14 2.9 0.72 1.0 9.4 0.52 3.2 0.8
R-6-127-AT 316 SS 410 24 6.1 1.53 1.0 14 0.78 6.8 1.7
CARBOLOY 610 36 10.5 2.61 1.0 19 1.1 11.6 2.9
GLASS 450 27 9.4 2.34 1.0 19 1.0 10.4 2.6
SIZE 6 SAPPHIRE 660 40 14.9 3.7
R-6-127-BT 316 SS 1000 65 30.1 7.5 1.0 35 1.9 33.3 8.3
CARBOLOY 1500 95 57.8 14.4 1.0 49 2.7 64.2 16
Note: 316 SS and Carboloy float capacities listed above can be used to size meters with optional inductance-type alarms
(*) Air flow rates in standard units are at 70'F and 14.7 PSIA, air flow rates in normal units are at 1.013 bar & 20'C
(**) When the viscosity of the fluid exceeds the viscosity immunity ceiling (VIC), a calculated correction is applied to account for
the difference between factory calibration fluid and process fluid.
1.0 24 1.3 16.5 4.1
March, 2014
porD erusserPporD erusserP Flow Rate
Table 1-4 Capacities and Pressure Drop Meter Sizes 7, 8, 9, 10, 12 &13: 200mm, 250mm Scale, Rib Guided Tubes, Standard Floats
1-4
Installation and Operation Manual
****riAretaW
Flow Rate Pressure Drop V. I. C.** Flow Rate Pressure Drop REQ. REQ.
TUBE FLOAT GPM l/h INCHES W.C. kPa cSt SCFM m3n/h INCHES W.C. kPa psi(*) bar(*)
***6 & 2 seziS rof elbaT yticapaC ot refeR2 eziS
***6 & 2 seziS rof elbaT yticapaC ot
refeR6 eziS
Size 7 R-7M-25-1FT 7-XV-11A 0.48 100 8.0 2.0 3.0 1.9 3.0 10 2.5 0 0
Size 8 8-XV-14 1.4 320 8.0 2.0 5.4 6 9.2 8.0 2.0 0 0
R-8M-25-4FT 8-XS-14 1.8 410 10 2.5 1.9 8 11 11 2.8 0 0
Size 9 9-XV-40 2.8 630 6.0 1.5 11 10 18 7.0 1.8 0 0
R-9M-25-3FT 9-XS-40 3.5 810 4.0 1.0 2.4 13 22 8.0 2.0 0 0
Size 10 10-XV-64 6.2 1400 11 2.8 15 25 40 13 3.3 0 0
R-10M-25-3FT 10-XS-138 10 2400 30 7.5 5.5 45 75 36 9.0 30 2
Size 12 12-XV-221 17 3900 10 2.5 29 70 110 12 3.0 0 0
R-12M-20-5FT 12-XV-343 20 4700 16 4.0 36 94 150 18 4.5 30 2
Size 13 13-XV-510 31 7200 26 6.5 42 130 200 28 7.0 0 0
R-13M-20-3FT 13-XS-510 42 9600 36 9.0 7.6 170 270 40 10 0 0
13-XHF-758
62.00 14000 40 10 1.0 270 450 44 11 30 2
(*) Minimum operating downstream pressure for gas service (psig)
(**) Viscosity immunity ceiling listed is for stainless steel float, fluid specific gravity 1.0. When the viscosity of the flui
d exceeds the viscosity immunity
ceiling (VIC), a calculated correction is applied to account for the difference between factory calibration fluid and process fluid.
Note 1: All size 8-13 floats listed are 316 SS with integral magnet for use with reed switch alarm.
(***) Alarm option for sizes 2 and 6 requires metallic float (SS or carboloy) for use with inductive type alarm.
(****) Air flow rates in standard units are at 70'F and 14.7 PSIA, air flow rates in normal units are at 1.013 bar & 20'C
Section 1 Introduction
X-VA-GT1000-eng
Part Number: 541B078AAG
March, 2014
Table 1-5 Capacities and Pressure Drop Meter Sizes 2 thru 13: 127mm, 200mm, 250mm Scale, Rib Guided Tubes, Alarm Floats
GT1000 Series
1-5
Section 1 Introduction
GT1000 Series
1-4 Optional Equipment - Alarms & V alves
GT1000 Alarm Contacts Meter Sizes 7 to 13
The Brooks reed switch alarm is a normally open, latching switch used in
conjunction with the GT1000 glass tube flow meter for signaling high and/or low
flow or a deviation from a flow setting.
A magnet embedded and sealed in the float actuates the alarm switch. The reed
switch is mounted adjacent to the flow tube and is easily adjustable over the
entire flow range of the instrument.
The sealed reed switch consists of a biasing magnet and hermetically sealed
reed switch, which is insulated to prevent damage from mild shock and normal
pipe vibration. The contact rating of the switch is very low (0.5A).
An external relay is recommended for secure operation. Plus the external relay
can be configured to operate as a normally open or normally closed state which
provides totally flexibilty of operation.
Alarm Certifications
Reed Switch Alarms,
Single or dual for meter sizes 7-13
Installation and Operation Manual
X-VA-GT1000-eng
Part Number: 541B078AAG
March, 2014
Electrical Classification
Non Incendive:
Maximum Volt age: 30 Vdc
Maximum Current: 250 mA
Maximum Contact Rating: 3 Watts
US and Canada E73889
NI Class I, Div 2, Groups A, B, C and D:
Class II, Groups F and G T6
per UL 1604, Third Edition
Environmental rating: T ype 4X
Intrinsically Safe:
Entity parameters:
Vmax = 30Vdc, Imax = 100mA, Ci=0, Li=0.
US and Canada E73889
1-6
IS Class I, II, III, Div 1, Groups A, thru G, T6
per UL 913, Sixth Edition
Environmental rating: T ype 4X
Installation and Operation Manual
X-VA-GT1000-eng
Part Number: 541B078AAG
March, 2014
Section 1 Introduction
GT1000 Series
Alarm Specifications:
Operating Fluid Temperature Limit s
Reed Switch: Same as meter
Inductive: 185°F (85°C) max.
Reed Switch Limits - Non-hazardous Locations
Maximum Voltage*: 175Vdc, 124Vac
Maximum Current*: 250mA
Maximum Contact Rating: 3 Watts
*(Maximum Switch Specifications)
Alarm Hysteresis
8 mm typical (0.32 in)
Wiring Diagrams
Alarm Wiring Diagram Figure 1-5 and Figure 1-7
1-7
Section 1 Introduction
GT1000 Series
NPT
Connections
Flanged
Connections
Installation and Operation Manual
X-VA-GT1000-eng
Part Number: 541B078AAG
March, 2014
Alarm
Options
1-8
Figure 1-4 GT1000 Family: NPT, Flanged and w/Alarm Options
Installation and Operation Manual
X-VA-GT1000-eng
Part Number: 541B078AAG
March, 2014
Section 1 Introduction
GT1000 Series
Inductive Alarms,
Alarm Contacts Meter Sizes 2 and 6
Inductive coils for high and/or low flow alarm may be mounted to the
instrument to create a highly sensitive, stable and accurate device for
signaling high or low flows or deviations from a controlled flow. The inductive
alarm can only be used in combination with 316 SS or Carboloy
The alarm points may be adjusted over the entire flowmeter range and be
set so that any two contacts may be made to operate simultaneously. For
hazardous area applications Brooks can supply an approved Namur power
supply amplifier/relay unit to obtain an intrinsic safe current circuit. (Please
refer to Table 1-6)
Table 1-6 Data 10&15-14-N3 Inductive Coils
®
ball floats.
Single or Dual for Meter Sizes 2 and 6
Intrinsically Safe:
Division 1, Class I, Groups A,B,C,D,
Class II, Groups E,F,G, Class III.
Operating Fluid Temperature Limit s
Reed Switch: Same as meter
Inductive: 167°F (75°C) max.
Alarm Hysteresis
8mm typical (0.32 in).
Alarm Accessories
Remotely mounted, switch isolator/power supplies are required for inductive
alarms and recommended for reed switch alarms. One or two single-pole,
double-throw (SPDT) relays are available with either 1 10 or 220 AC volt
units.
Optional Needle Valves
For flow rate control, needle valves may be externally piped to the inlet or
outlet side of the instrument via an adapter. Valves are available with
threaded or flanged connections. Note, solenoid valves should not be used
because this type of valve can cause pressure shocks which can damage
the glass tube.
Note: Flanged valves are supplied separately .
1-9
Section 1 Introduction
GT1000 Series
Installation and Operation Manual
X-VA-GT1000-eng
Part Number: 541B078AAG
March, 2014
Figure 1-5 Alarm Switch(es) for GT1000 Sizes 7 - 13
1-10
Loading...