Omega FMA-1900 User Manual

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FMA-1900

Mass

Flow Meter

OMEGAneP

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WARNING: These products are not designed for use in, and should not be used for, patient connected applications.

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regulations that

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B

Omega Engineering is not liable for any damages or
personal injury, whatsoever, resulting from the use of Omega’s mass
flow meters or controllers with oxygen gas. Although the mass flow
meters and controllers are cleaned prior to shipment, we make no
claim or warranty that their cleanliness renders them safe for oxygen
service. The customer must clean Omega’s mass flow meters or
controllers to the degree that they require for their oxygen flow
applications. This statement does not replace product warranty.

m

Over-tightening the pipe connection may crack the

fittings or shift the calibration of the FMA-1900 controller.

B

The maximum pressure and temperature in the flow line in

which your FMA-1900 is to be installed should not exceed 150 psig

(5O”C),

122°F

kg/cm*

gauge) or

B

The FMA-1900 is not a loop powered device! Do NOT

apply power to the 4-20

B

power supply (50
watts (250mA)

The FMA-1900 controller requires a 24 VDC regulated

mV

@

24 VDC

mA

output or input section.

RMS ripple) with the ability to provide at least 6

510%.

respectively.

If you are providing your own
power source, refer to Section 2.3, paragraph 8, for specific power
supply requirements and jumper settings.

B

Do not use liquid leak detectors

search for leaks

to

inside or outside the FMA-1900. Instead, monitor pressure decay.

Operator’s Manual

M248310898

FMA-1900 SERIES FLOW CONTROLLERS

TABLE O F

.

1

Introduction

Description.. .....................................................................

1.1
Specifications

1.2

2. Installation
Receipt of Your

2.1
Return

2.2
Before Beginning the Installation

2.3
Mechanical Installation

2.4
Plumbing

2.5
Electrical

2.6

3.

Operation

Referencing the Flow Rate to Other Temperature and

3.1
Pressure
Accuracy

3.2
Overranging

3.3
The 4-20

3.4
Zero and

3.5
Mounting

3.6
Output Options

3.7
Setpoint Input Signal

3.8
Setpoint Configuration

3.9
Cold Sensor Lockout Circuit

3.10

3.11 Auto Shut-Off

............................................................................

..................................................................

..................................................................................

FMA-1900

Shipment..............................................................

Connections

Connections

...................................................................................

Conditions

.....................................

...................................................................

mA

Output Signal

Local

Setpoint

Position..........................................................

...............................................................

.................................................................

CONTENT S

1
1

2
4

...............................................

.....................................

....................................................

.....................................................

.....................................................

.......................................................

_.

..................................

...........................................

Adjustments

......................................................

...................................................

..........................................

............................

4
4
5
7
8

9

11

......

11
11
12
12
12
13
13
13
15
16
16

FMA-1900 SERIES FLOW CONTROLLERS

TABLE O F

CONTENTS CONTINUE D

3. Operation (continued)

3.12 On/Off Control

3.13Purging of Mass-Trak Products

3.13.1 Purging of Non-reactive

Appendix A Pin Connections

Appendix B Purge and Valve Off Connections

Appendix C K-factors and Gas Tables

...............................................................

.....................................

Gases

.....................................

..........................................................

.,............................. 19

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..*..........

16
17
17

18

20

-I-

INTRODUCTIO N

1.1

Description

Omega’s FMA-1900 Series products can be calibrated to

measure and control the mass flow rate of gases in several

ranges from O-l 0 standard cubic centimeters per minute
(SCCM) to
+1.5%

range, and time response is 5 seconds to within 2% of set
point.

The FMA-1900 is ideal for a complete range of gas flow

applications including general process control, laboratories,
instrument OEM’s, gas panels, and flow calibration.

O-50

standard liters per minute (SLM). Accuracy is

of full scale over a wide temperature and pressure

Figure

I-

1 The FMA- 1900 Flow Controller

ZERO

SET POINT

The versatile FMA-1900 product digitally displays the mass
flow rate directly in engineering units or percent of full scale.

The FMA-1900 is a transducer requiring a regulated 24 VDC
external power source. The O-5 VDC and 4-20
signals, which are linearly proportional to gas mass flow rate,
are provided for recording, data-logging, or control. A
“D”

connector is provided for power input, output signal and set
point control. FMA-1900 is available in several basic configu-
rations with either NPT (female) or compression inlet/outlet
fittings, and with or without the optional power supply.

output

mA

15-pin

l&Specifications

FLOW RATES: O-10 SCCM to O-50 SLM; flow ranges speci-

fied are for an equivalent flow of nitrogen at 760 mm Hg and

21

.l

“C (70°F). Other ranges in other units are available (e.g.,

SCFH or
FMA-1900 SERIES MINIMUM DP REQUIREMENTS: 5-50

PSI
optimum.

GASES: Most gases (e.g., air, nitrogen, methane, carbon
dioxide, argon, helium, hydrogen); check compatibility with
wetted materials; specify when ordering.

OUTPUT SIGNALS: Linear O-5 VDC into 2000 Ohm minimum
load resistance standard or linear 4-20
maximum load resistance for 24 VDC supply (500 ohm/l5
VDC supply).

CONTROL RANGE: Calibrated for 10 to 100% of full scale.
INPUT POWER: 0 to 15

VDC

nm3/h).

kg/cm*)

flO%

differential standard; 30 PSI (2 (0.35-3.5

mA

flO%;

into 1000 ohm

0 to 50 SLM/15 VDC

kg/cm*)

SLM/24

O-100%

fl.5%

of full scale from 1 ACCURACY

scale.

of

REPEATABILIW
TEMPERATURE

PRESSURE COEFFICIENT: 0.02% of full scale per PSI (0.07

kg/cm*),

RESPONSE TIME: One second to 63% of final value.

GAS PRESSURE: 150 PSI (10
20 PSI (1.4

LEAK INTEGRITY: 1 x

to outside environment.

shutoff
GASANDAMBIENTTEMPERATURE:

WEllED

430F stainless steel; nickel plating; Viton
SETPOINT

optional) into 22000 Ohms. O-20
Ohms input impedance.

or better:

valve.)

MATERIALS:

&0.25%

COEFFICIENTI

kg/cm*)

COMMAND SIGNALS: O-5 VDC (O-10 VDC

full

0.08% of full scale per

kg/cm*)

gauge optimum.

lo-‘ATM

(Not recommended for use as a positive

10% glass-filled

cc/set

32” to 122°F (0 to 50°C)

mA

of full scale.

“C,

or better.

gauge maximum;

of helium maximum

66; 316 stainless steel,

Nyton

“C”-rings.

mA

and 4-20

into 250

-2-

INSTALLATIO N

2.1

Receipt of Your FMA-1900

After receiving your FMA-1900, carefully check the outside of
the packing carton for damage incurred in shipment. If the
packing carton is damaged, notify the carrier at once regarding
their liability. A report with the serial number and part number
should be submitted to Customer Service. Call 800-622-2378
for detailed instructions.

Remove the packing slip from its envelope and check that the
carton contains all parts listed. Make sure spare parts or
accessories are not discarded with the packing material. In
case of shortages, contact 800-872-9436
Have your purchase order and model number available.

2.2

Return Shipment

Do not return any equipment without a Return Authorization,
obtainable from the Customer Service Department at the
number shown above.

Information describing the problem, the corrective action or work to
be accomplished at the factory, the purchase order number under
which the work is to be done, and the name of person to contact
must be included with the returned equipment.

NOTE:Equipment returned for repair that is found to be com-
pletely operational will be subject to the current “no problem
found” billing rate.
identify possible problems with the installation or application.

In a case such as this, Omega will attempt to

(800~USA-WHEN).

2.3

Before Beginning the Installation

Read the following notes in their entirety before beginning

actual installation of your FMA-1900 flow controller.

1.

Using the flow direction arrow on the FMA-1900 to prop-
erly orient the controller, install the FMA-1900 into the gas
flow line. If you are utilizing
quality paste pipe thread sealant. First tighten the fittings

by hand, then tighten no more than one and a half turns to
avoid cracked fittings or creating a calibration shift.

The line pressure and temperature should not exceed 150
psig (10
operating pressure differential is 50 psig.

2.

Apply power to your FMA-1900. If you are using the

Omega power supply, connect it to the
tor on the side of your FMA-1900, then plug the power
supply into line power. If you are providing your own
power source, refer to Section 2.3, paragraph 8, for
specific power supply requirements and jumper settings.

3.Upon application of power, the output signal will be at a high
level for the first 10 to 20 seconds, after which (assuming zero
flow) it will drop to 0 VDC (or
ration). Allow at least 15 minutes for complete warmup.

CAUTION:

Do NOT apply power to the 4-20

4.

After the warm-up period, your FMA-1900 will begin

monitoring the gas mass flow rate.

5.

Output Signals: The FMA-1900 has either O-5 VDC (O-l 0
VDC optional) or 4-20
control range of the unit is 10% to 100% of the calibrated
flow range. The output is

mass flow rate. The full scale range and the gas for which
the unit was calibrated are shown on the FMA-1900 data
tag. Section
the electrical output signal hookup. For example, if you are
monitoring the O-5 VDC output signal, 5.00 VDC is the
output signal for the full scale listed on the FMA-1900 data
tag; 2.50 VDC is for one-half of full scale; and 0.00 VDC is
for zero flow.

signal, 20.00

mA

kg/cm*

gauge) or 150°F (66°C). Maximum

The FMA-1900 is not a loop powered device!

2.6,

ELECTRICAL CONNECTIONS, describes

If you are monitoring the 4-20

mA

is the output signal for the full scale; 12.00

is for one-half of full scale; and 4.00

l/4-inch pipe, use a good

15-pin

4mA,

depending on output configu-

mA

output or input section.

mA

output signals. The effective

linearty

proportional to the gas

mA

is for zero flow.

connec-

“D”

mA

output

l/2

Integral Display: The 3

6

engineering units or optional percent of full scale. The full
scale range and gas are shown on the instrument data tag.
The decimal point for the flow rate is set at the factory and
will show automatically (e.g., “5.54” SLM or “76.4”

Overrange conditions are indicated by the display and/or

7.

output going to a high level, above the full scale range.
After the over-range condition has been removed, it may
take several minutes for the FMA-1900 to recover and
resume normal operation.

The FMA-1900 has more stringent power supply require-

8.

ments due to the presence of the valve.
is operated in a control loop, power supply variations
cannot be tolerated. This means the power supply must be
a regulated 24 VDC with ripple not to exceed 50mV peak to
peak, and capable of producing at least 250mA (6 watts).

The standard power supply for both the FMA-1900 is 24
VDC. It is possible to operate the FMA-1900 on 15 VDC at
reduced performance levels. There is a direct relationship
between the amount of power the valve requires and the
flow rate. Due to this relationship, 15 VDC powered
controllers are limited to a flow rate of 15 SLM. To achieve
flow rates above

The minimum power requirements for all FMA-1900
controllers are as follows:

15 VDC
installed) [If less than 15 SLM].

24 VDC
removed)

A regulated power supply is required. Ripple content
should not exceed 50mV peak to peak.

Refer to the component location diagram (Figure 3-2) for
the location of Jumper J3.

160mA,

@

250mA,

@

[

15 to 250 SLM].

digit LCD display reads directly in

%).

Because the valve

15

SLM, use a 24 VDC power supply.

Jumper J3 closed (shorting block

Jumper J3 open (shorting block