Dwyer RRT3 User Manual

Bulletin T-RRT3

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Series RRT3 Remote Reading Thermometer with Switch

Specifications - Installation and Operating Instructions

The Series RRT3 Remote Reading Thermometer with Switch combines an

asy to read 3-1/4˝ dual scale dial thermometer and a SPDT relay. Color

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coordinated pointers display the current process temperature and set point. In
order to change the set point, a front adjustment knob controls the red set point

ointer. The design of the internal mechanical switch movement prevents the set

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oint pointer from sticking to the process indicating pointer. A 10.5 ft (3.2 m)

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tainless steel flex hose capillary prevents kinking and leaking of the measuring

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fluid when bending the capillary. For quick installation, electrical connections can
be made to male quick connects or to the finger-safe screw terminals.
Thermometer includes a u-clamp mounting bracket for panel mounting.

OPERATING INSTRUCTIONS

Setting Knob

9

Setting Pointer

8

Terminal

7

Bracket

6

Case

5

Cover

4

Glass Disk

3

Scale Plate

2

Pointer

1

SPECIFICATIONS
Wetted Materials: Brass.

ccuracy: ±3% FS.

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Housing Material: 304 SS.
Temperature Limit: -4 to 158°F (-20 to 70°C).
Switch Type: SPDT, 3 A @ 250 VAC, .2 A @ 250 VDC.
Electrical Connections: Normally open (NO), normally closed (NC), and

ommon (COM).

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rocess Connection: 1/2˝ (12.7 mm) male NPT.

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Dial Size: 3-1/2˝ (90 mm).
Capillary Length: 10.5’ (3.2 m).
Bulb Length: 3˝ (76 mm).
Weight: 2 lb (900 g).

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: [phone] e-mail: [e-mail]

Phone: [phone] www.dwyer-inst.com

echanical Installation

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. For mounting, select a clean, dry location, free from extreme temperatures.

1

. Cut a 3-7/32˝ (82 mm) diameter hole in the panel for the thermometer.

2

. Prior to inserting the thermometer into the panel, remove the mounting bracket.

3

4. Insert the thermometer into the panel cutout from the front.

5. Place the U-bracket on the back of the thermometer (make sure the screws are
aligned with the holes in the mounting bracket).

. Secure the bracket into place by tightening the nuts until the bracket is tight against

6

he panel.

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NOTICE

7. The probe should be mounted so the bulb is fully immersed in the media and where
the media temperature will be evenly distributed.

OTICE

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emperature sources. Take care in arranging the steel capillary to avoid sharp

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ends that might kink internal capillary tube.

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Electrical Connections

AUTION

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1. Connections for the switch are made by three connections. The quick connect
terminals are labeled N.O., N.C., and COM. N.O. is the normally open terminal,
COM is the common terminal, and N.C. is the normally closed terminal.

2. For NC (normally closed) operation, make switch connections using terminals COM

nd N.C.

a

. For NO (normally open) operation, make switch connections using terminals COM

3

nd N.O.

a

If panel thickness exceeds 13/64˝ (5 mm), the bracket must be
shortened accordingly.

Since temperature effects along the capillary are compensated

or, the capillary should not be located close to other

f

Do not exceed the specified electrical ratings shown on the unit.
Permanent damage, not covered by the warranty, will result.

et Point Operation

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he switch set point is fully adjustable across the entire range of the unit. The unit is

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quipped with internal stops at the minimum and maximum values of a specified

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ange.

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Adjust the set point by rotating the black knob on the front of the dial case to the
desired temperature setting.

AINTENANCE/REPAIR

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pon final installation of the Series RRT3, no routine maintenance is required. The

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eries RRT3 is not field serviceable and should be returned if repair is needed. Field

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repair should not be attempted and may void warranty.

WARRANTY/RETURN

efer to “Terms and Conditions of Sales” in our catalog and on our website. Contact

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ustomer service to receive a Return Goods Authorization number before shipping the

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roduct back for repair. Be sure to include a brief description of the problem plus any

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additional application notes.

©Copyright 2012 Dwyer Instruments, Inc. Printed in U.S.A. 3/12 FR# R5-443930-00

DWYER INSTRUMENTS, INC.

Phone: [phone] www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: [phone] e-mail: [e-mail]