Barksdale 446 User Manual

Installation And Maintenance Instructions

See Control Drawing TD-B77 for Intrinsically Safe Installation

*

CAUTION: This device should only be installed by service personnel properly trained on
Intrinsically Safe System requirements.

Specifications:

Calibration Reference Conditions
Ambient Temperature:
Relative Humidity:
Barometric Pressure:

Performance Characteristics
Accuracy (LH&R):

Long Term Stability:

Proof Pressure:

Life, Cycling:

Vibration:

Shock:

Wetted Material:

Electrical Connection:

Pressure Cavity Volume:

Enclosure Rating:

CALIBRATION

All models are tested to meet or exceed the published
specifications. The calibration and testing were done using
instrumentation and standards traceable to the National
Institute of Standards and Technology (NIST). Also tested
in accordance with MIL-STD-45662A.

75°F
40 to 60%

29.92 in.Hg.

±0.25%, Best Straight Line
(BSL)@75°F
Will repeat within ±0.25% FSO
of original calibration on curve
for 1 year
2 times rated pressure range,
or 13,000 psi, whichever is
less
Full scale pressure cycles:

8

10

to 300 psi, 107 to 1,000 psi,

6

to 7,500 psi

10
15 g's, 10 to 2000 Hz

(MIL-STD-202, M204, Cond. B)
50 g's, 11 ms (MIL-STD-202,
M213, Cond. G)

300 series and 17- 4 PH
stainless steel.

1 meter jacketed cable, standard
See alternate connections on back

0.075 inches maximum
NEMA 4X

445 SERIES445 SERIES

445 SERIES

445 SERIES445 SERIES

HAZARDOUS LOCATIONS
INTRINSICALLY SAFE PRESSURE TRANSMITTER

Excitation:
Output:
Zero Output:
Full Scale Output:
Protection:
Loop Resistance:
Temperature Range:

Agency Temp.Code:
Temperature Error:

Weight:
Wiring:

12 to 28 VDC

4 to 20 mA
4 mA, ± 2.0% of FSO @ 75°F

20 mA, ± 1.0% @ 75°F
Reverse polarity protected
See loop resistance chart on back page

o

Compensated: -40
Operating: -40

T4

±0.01% of FSO/°F over the compensated

range.

5.9 oz (167.5 grams)

H3,H5 Cable T4,T5 Pins
Red (+Excite)
Black (Common)
Drain (Case Ground)

H6 - SJO Cord Wire Code:
White
Black
Green

(+Excite)
(Common)
(Case Ground)

to +160oF(-40o to 71oC)

o

to 185oF (-40o to 85oC)

Pin 1
Pin 2
Pin 4

Agency Approval

Intrinsically Safe Pressure Transmitter for use in

*

Hazardous Locations, Class I, Groups A, B, C & D,
Class II, Groups E, F & G only when installed in
Accordance with Control Drawing TD-B77.

Telemetering Equipment for Use in Hazardous Locations
UL File No. E146589, Guide No. WYMV, WYMV7.

W A R N I N G ! READ BEFORE INSTALLATION

Fluid hammer and surges can destroy any pressure transmitter and must always be avoided. A pressure snubber should be installed
to eliminate the damaging hammer effects. Fluid hammer occurs when a liquid flow is suddenly stopped, as with quick closing solenoid
valves. Surges occur when flow is suddenly begun, as when a pump is turned on at full power or a valve is quickly opened.

Barksdale pressure transmitters having a pressure range 2,000 psi and higher have a built in pressure surge protection in the input
port. The designis such that an orifice is made an integral part of the pressure port. Designed with the upstream side of the orifice as
a sharp corner, it acts as a very effective protection. Other orifice devices can be installed upstream of the pressure transmitter in the
piping system for extra protection where the system engineer requires it.

Liquid surges are particularly damaging to pressure transmitters if the pipe is originally empty. To avoid damaging surges, fluid lines
should remain full (if possible), pumps should be brought up to power slowly, and valves opened slowly. To avoid damage from both
fluid hammer and surges, a surge chamber should be installed, and a pressure snubber should be installed on every transmitter.

Symptoms of fluid hammer and surge’s damaging effects:

1. Pressure transmitter exhibits an output at zero pressure (large zero offset). If zero offset is less than 10% FS, user can usually
re-zero meter, install proper snubber and continue monitoring pressures.

2. Pressure transmitter output remains constant regardless of pressure.

3. In severe cases, there will be no output.

TORQUE REQUIREMENTS:

Apply pipe compound sparingly to male pipe threads only. Avoid pipe strain on Transmitter housing by properly supporting and
aligning piping.
Apply wrench to the hex flats of fittings only, then tighten the connection. Adequate support of piping and proper mounting of the
pressure transmitter should be made to avoid excessive shock and vibration.

TORQUE TO 125 - 150 pound inches.

Barksdale, Inc., 3211 Fruitland Avenue, Los Angeles, CA 90058-0843 [phone], www.barksdale.com Bul le tin No . 272 139-C 6-26- 02

1 1/2

DIA.

(TYP.)

4 15/32

1/2

(TYP)

H3 SHIELDED JACKETED CABLE

ELECTRICAL CONNECTION-STANDARD

7/8

Hex

(Typ.)

1/4 NPT PRESSURE PORT STANDARD

FOR 7/16-20 UNF (FEMALE) ADD -P1 TO P/N.
FOR 7/16-20 UNF (MALE) ADD -P3 TO P/N.
FOR 1/8-27 NPT MALE ADD -P7 TO P/N.
FOR 1/4 NPT FEMALE ADD -P6 TO P/N.

MATING PLUG
M12 X 1 4 PIN
(NOT PROVIDED)

4 5/8

H5 1/2 NPT CONDUIT

ELECTRICAL CONNECTION

4 5/32

T4 12 mm DIN

ELECTRICAL CONNECTION

5 1/8

ADJ. ACCESS SCREWS MUST BE
INSTALLED TO SEAL ENCLOSURE

H5-E 1/2 NPT CONDUIT ELECTRICAL CONNECTION

WITH FIELD ZERO/SPAN ADJUSTMENTS

5 5/16

T5 TYPE 43650 DIN

ELECTRICAL CONNECTION

5 13/16

ADJ. ACCESS SCREWS MUST BE
INSTALLED TO SEAL ENCLOSURE

H6-E SJO CORD ELECTRICAL CONNECTION

WITH FIELD ZERO/SPAN ADJUST-

MENTS

RETURN REQUESTS / INQUIRIES

Direct all warranty and repair requests/inquiries to Barksdale, Inc. Customer
Service
Department. Call 323-589-6181, FAX: [phone]

BEFORE RETURNING ANY PRODUCT(S) TO BARKSDALE, YOU MUST OB­TAIN A RETURNED MERCHANDISE AUTHORIZATION FROM OUR CUSTOMER
SERVICE DEPARTMENT (IN ORDER TO AVOID PROCESSING DELAYS).

FOR WARRANTY RETURNS, please have the following information available
BEFORE contacting Barksdale:

1. P.O. number under which the product was PURCHASED.

2. Model number of the product under warranty.

LOOP RESISTANCE CHART

MAXIMUM

1000

500

0

REQUIRED (OHMS)

LOOP RESISTANCE

12

15

20

EXCITATION VOLTAGE (volts DC)

3. Repair instructions and/or specific problems you are having with the product.

4. Application information.

FOR NON-WARRANTY REPAIRS OR CALIBRATION, consult Barksdale for
current repair/calibration charges. Have the following information available BE­FORE contacting Barksdale:

1. Your P.O. number to cover the COST of the repair/calibration.

2. Model number of product.

3. Repair instructions and/or specific problems you are having with the product.

Copyright 2001 Barksdale, Inc.

800 OHMS

25

OPERATING
BAND

28