Dwyer Series TPG User manual

Brand: Dwyer

Model: Series TPG

Type: User manual

DWYER INSTRUMENTS, INC.

Phone: 219/879-8000 www.dwyer-inst.com

P.O. Box 373 • Michigan City, IN 46361-0373, U.S.A. Fax: 219/872-9057 e-mail: info@dwyer-inst.com

The Series TPG Temperature & Pressure Gage eliminates the

need for two separate temperature and pressure gages. Unique

internal valve depressor built into the well allows the gage’s

sensing probe to be easily removed from the thermowell without

causing leakage, eliminating downtime. Installation time is further

reduced via one connection to pipe instead of two.

Series TPG is packaged in an ABS plastic case. Models are

available with a back mount, direct bottom mount, 45° bottom

mount or panel or surface mount with capillary. Side by side

pressure and temperature scales allow quick and easy readings.

Series TPG has a temperature accuracy of 2% and a pressure

accuracy of 1.6% of full scale. Intended for industrial or HVAC

applications, specifically measuring water in air conditioners and

heat ventilation systems.

Series TPG Temperature & Pressure Gage

Specifications - Installation and Operating Instructions

Bulletin A-TPG

SPECIFICATIONS

Service: Clean water and compatible gases.

Wetted Materials: Brass, 304 SS.

Housing Materials: ABS Plastic.

Accuracy: Pressure ±1.6% FS; Temperature ±2.0% FS.

Pressure Limits: 150% FS. Normal operation should be

between 10% and 90% of full scale.

Temperature Limits: Ambient: -4 to 140°F (-20 to 60°C);

Process: Within range.

Humidity Limit: Ambient not to exceed 80%.

Size: TPG-BA/TPG-BO: 4.33˝ (110 mm) casing, 3.54˝ (90 mm)

dial; TPG-45: 4.41˝ (112 mm) casing, 3.66˝ (93 mm) dial.

Process Connections: 1/2˝ male NPT

Mounting Orientation: Dial face in vertical position.

Weight: 15.2 oz (431 g).

4-21/64

(110)

6-19/64

(160)

1-45/64

(43)

4-27/64

(112)

5-19/32

(142)

2-23/64

(60)

3-3/16

(81)

45°

2-41/64

(67)

35/64

(14)

6-11/16

(170)

4-21/64

(110)

(3) 9/32 (7) HOLES

EQUAL SPACED

ON 4-59/64 (125) B.C.

5-33/64

(140)

45/64

(18)

5/32

(4)

LENGTH

FC=FLUSH CAPILLARY

SC=SURFACE CAPILLARY

A-TPG 2/22/06 8:20 AM Page 1

INSTALLATION

Location

Select a location free from excessive vibration and where the

ambient temperature ranges from -4 to 140°F (-20 to 60°C), and

humidity will not exceed 80%. Excessive vibration may cause

damage. Be sure to expose unit only to levels of pressure and

temperature within specified ranges. Ensure that exposed

pressure to unit will be typically within 2/3 of full scale. Do not

place gage near anything that will cause it to deviate from normal

functions and cause false readings.

Position

Install with dial face in vertical position. Adjust angle before

installing.

Note: Unit is intended for use only within described temperature

and pressure ranges and connection standard. Before installation,

check to see that all necessary parts are present. Do not install if

O-ring and washer are missing from sensing probe. Do not use

machine power on the unit. Do not subject unit to sudden

pressure or pressure outside designated limits.

Installation Procedure

Make sure main process valve is closed and internal process

pressure and temperature have been stabilized before installing.

Ensure that all threads are properly sealed with plumbers tape or

other sealant before moving on to next step.

Insert thermowell into pipe, making sure to screw it in all the way.

Insert gage’s sensing probe into thermowell, also making sure the

seal is tight.

Note: It is normal to have fluid from the piping left inside the

thermowell when unit is removed from thermowell. When removing

unit, close main process valve to ensure stable internal process

pressure and temperature and wait for any liquid to cool down to

a safe temperature.

Note Regarding Capillary Models Only: Take care when

unwinding coil from packaging so as not to kink it. The capillary is

easily damaged by vibration. Any excess capillary slack should be

wound to a coil of over 4 inches and bound securely near gage.

The minimum radius for coil is 2 inches. Do not wind capillary any

tighter as it will kink. Do not place capillary near anything that will

cause it to deviate from normal functions and cause false readings.

INSTALL THERMOWELL FITTING

THEN CAREFULLY SCREW GAUGE WITH

PROBE INTO THERMOWELL FITTING.

THERMOWELL FITTING

DWYER INSTRUMENTS, INC.

Phone: 219/879-8000 www.dwyer-inst.com

P.O. Box 373 • Michigan City, IN 46361-0373, U.S.A. Fax: 219/872-9057 e-mail: info@dwyer-inst.com

MAINTENANCE

There is a wire mesh located at the tip of the thermowell, which

functions as a filter. Do not tamper with or otherwise alter

thermowell. When thermowell is supplied separately, there will be

a cap on the inner thread to protect from debris. This cap should

be left on until thermowell is to be installed.

Note: We generally recommend that gages needing repair be

returned to the factory. Parts used in various sub-assemblies vary

from one range of gages to another, and use of incorrect

components may cause improper operation. After receipt and

inspection, we will be happy to quote repair costs before

proceeding.

Consult factory for assistance on unusual applications or

conditions.

The Series TPG Temperature and Pressure Gage is not field

serviceable and should be returned if repair is needed (field repair

should not be attempted and may void warranty). Be sure to

include a brief description of the problem plus any relevant

application notes. Contact customer service to receive a return

goods authorization number before shipping.

A-TPG 2/22/06 8:20 AM Page 2

Dwyer Series TPG User manual

Dwyer Series TPG User manual

Dwyer Series TPG User manual

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