Noshok 627 Series Pressure & Level Transmitters User Manual download pdf

User Manual

NOSHOK

PRESSURE & LEVEL

TRANSMITTERS

Series 625, 626 and 627

Intrinsically Safe

APPROVED

(Factory Mutual and Canadian

Standards Association Approved)

CORPORATE HEADQUARTERS

1010 West Bagley Road

Berea, Ohio 44017

440.243.0888

440.243.3472 Fax

E-mail: [email protected]

Web: www.noshok.com

It is important that these transmitters be installed,

operated and maintained in accordance with all NEC

and applicable codes. Also, these products may not

be modified in any way. Failure to adhere to this

requirement will void the IS approval rating.

Model 627 comes standard with a polyurethane

jacketed cable containing a strength member which

allows it to support the transmitter without additional

supports. Also, this cable has a vent tube which

provides an ambient pressure reference. The end of

the vent tube should be protected from moisture.

If moisture finds its way into the transmitter

electronics it could adversely affect the performance

of the product.

For some applications the use of a gortex filter

inserted into the end of the vent tube will be adequate.

In more humid conditions a desiccant cartridge plugged

into the end of the vent tube is recommended. A teflon

jacketed cable is available for applications that are not

compatible with the standard polyurethane material.

Wiring of all the transmitters is based upon a 4 mA

to 20 mA, 2-wire current loop. The DC power supply,

transmitter and receiving instrumentation are wired in

series. The transmitter controls the current in the loop

which is directly proportionate to the measured

pressure.

Maintenance

NOSHOK model 625, 626 and 627 transmitters

require no maintenance. They are calibrated at the

factory using pressure standards traceable to NIST.

However, models 625 and 626 have user accessible

zero and span potentiometers located under the top

cap. These are trimming adjustments with about

±10% adjustment capability. Model 627 is sealed

and does not have any user accessible adjustments.

NUMIS 03-1

1 2

Summary of Contents

Page 1 - TRANSMITTERS

User ManualNOSHOKPRESSURE & LEVELTRANSMITTERSSeries 625, 626 and 627Intrinsically SafeFMAPPROVED© US®(Factory Mutual and CanadianStandards Associa

Page 2 - +Output 2 Black/Green 3 B 2

FMRC 3600, 3610, 3611, 3810 (includingsupplement #1), ISA-S12.0. 01, IEC 60529 (includingamendment #1)Installation and CommissioningModel 625 pressure

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Noshok 627 Series Pressure & Level Transmitters User Manual

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