Kobold TDD-153 series User manual

KOBOLD Instruments Inc. 1801 Parkway View Drive PittsburghPA 15205

Phone (412) 788-2830• Fax (412)-788-4890 • www.koboldusa.com

KOBOLD TDD Series Digital Temperature Switch

TDD-153 and TDD-353 Series

User Instructions

Manual-TDD_8-01

Table Of Contents

FM Rev. 8/6/01

TDD

KOBOLD TDD Series Digital Temperature Switch

1.0 General . . . . . . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 1

2.0 Specifications. . . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 1

3.0 Mechanical Installation. . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 3

4.0 Electrical Installation. . . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 4

5.0 Operation . . . . . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 5

5.1 Programming Functions. . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 5

5.2 Programming Menu Item Descriptions. . .. . . . . . . . . . . . . . . . . . . . . . 8

6.0 Maintenance . . . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 10

List Of Diagrams

Diagram 2.1 Dimensions. . . . . . .. . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 3

Diagram 3.1 Electrical Connections. . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 4

Diagram 5.1 Displays and Controls. . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 5

Diagram 5.2 Programming Functions. . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 5

Diagram 5.3 Sequence to Change a Value. . . .. . . . . . . . . . . . . . . . . . . . . . 6

Diagram 5.4 Programming Flowchart. . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 7

List of Tables

Table 2.1 Part Number Identification. . . . . . .. . . . . . . . . . . . . . . . . . . . . . 2

TDD

FM Rev. 8/6/01

CAUTION: For safety reasons, please read the cautionary information located at

the end of the manual, before attempting installation.

1.0 General

The KOBOLD TDD Series is a solid state, electronic temperature switch which employs

a Pt-100 RTD as the heart of the sensing system. The measuring probe and housing are

constructed of 316L stainless steel providing excellent corrosion resistance. The TDD’s

microprocessor based electronics allow the user to program a setpoint, adjust switching

hysteresis, dampening and switch logic. There is virtually no calibration drift over its

service life.

In addition to the switch output, the TDD has a digital display for local indication of

temperature.

2.0 Specifications

Available Switching Ranges: 0°F to 250°F or -20°C to

120°C

Display Type: 3 Digit LED

Resolution: ±0.5° below 100°

±1° for 100° and above

Switch Status: Red LED on when

Temperature is above setpoint

Accuracy (worst case)

32°F to 160°F: ±1°F

0°F to 31°F: +6°F/-2°F

161°F to 230°F: +2°F/-4°F

231°F to 250°F: +2°F/-5°F

Sensor Element: Pt-100 RTD

Maximum Pressure: 1150 PSIG

sensing Probe Material: 316L Stainless steel

Housing Material: 316L Stainless steel

Electrical Data

Switch Type: Open collector, NPN or PNP

based on model number,

programmable N/O or N/C

Switch Rating: Max. 300 mA, short circuit

protected

Response Time: 50 mSec.

Power Supply Requirement: 24 VDC ±20%, 40 mA Max.

Electrical Connection: M-12 male, Micro-DC

Electrical Protection: NEMA 4X/IP 65

TDD 2

FM Rev. 8/6/01

Table 2.1 Part Number Identification

TDD = Compact Electronic Temperature Switch

153 = PNP transistor switch Output Type

353 = NPN transistor switch

N4 = 1/2” NPT Fitting

N5 = 3/4” NPT

Range

TDD - 353 - N4 - F2 Example

F2 = 0 to 250°F

H2 = -20 to 120°C

3TDD

FM Rev. 8/6/01

Diagram 2.1 Dimensions

3.0 Mechanical Installation

The following general installation instructions and precautions must be followed to insure

proper, reliable switch operation:

1. Select a suitable location on the piping system for installation. Installation in a

location where sediments can collect on the switch’s temperature sensing

probe (such as the underside of a horizontal piping run) will cause sluggish or

faulty operation.

2. The switch should not be installed directly on top of a horizontal piping run (12

O’clock position). Air pockets which can form at the top of the pipe will prevent

the measuring probe from obtaining accurate temperature measurement.

Mounting at the 2 O’clock to 5 O’clock or the 7 O’clock to 10 O’clock position is

best.

3. The ambient temperature range which the switch can withstand is -4°F to

+140°F. If the switch is located outdoors in a cold environment the switch must

be protected from excessively cold temperatures with insulated heat tracing or

by other suitable means. In hot environments the switch should be located in

an area where the ambient temperature does not exceed 140°F.

4. In order to obtain an accurate measurement of the bulk fluid temperature in a

pipe, the fitting into which the switch is installed must allow the sensing probe

tip to protrude past the ID of the pipe and into the flow stream. The turbulent

fluid flow will then promote mixing and yield an accurate measurement.

1.75

0.93

1.68

1.56

41 mm

Std. connector

M-12 x 1

1.89

.47

.45

.28

1/2” NPT 2.76

3/4” NPT 2.78

Dimensions in inches unless otherwise noted

TDD 4

FM Rev. 8/6/01

4.0 Electrical Installation

The following electrical installation instructions and precautions must be followed to

insure proper switch and analog output operation. Failure to follow these instructions

may result in irreparable damage to the switch:

1. The unit employs an open collector NPN or PNP transistor switch. To verify

which model you are installing, check the model number codes in Section 2.0,

Specifications. When the PNP version activates, it connects the DC supply

voltage to the switch output pin. When the NPN version activates, it connects

the DC ground to the switch output pin.

2. This switch can only switch fixed polarity DC loads with a maximum current

draw of 300 mA. To switch higher current DC loads or AC loads use an

appropriately sized relay.

3. In order to minimize electromagnetic noise pickup, a jacketed instrument and

control cable with shield should be used. The shield should be connected to

the power system earth ground at one end of the cable only.

Diagram 4.1 Electrical Connections

Typical Wiring

34Switch Out

Not

Connected

-DC

+ DC Supply

24 VDC ±20%

Optional Mating Connector

Brown = 1 = +DC

White = 2 = Not Connected

Blue = 3 = -DC

Black = 4 = Switch Out

TDD-153...

+DC

Switch Out

-DC

Load

PNP Switch Version

TDD-253...

+DC

Switch Out

-DC

Load

NPN Switch Version

5TDD

FM Rev. 8/6/01

5.0 Operation

Diagram 5.1 Displays and Controls

5.1 Programming Functions

The TDD digital Temperature switch is programmed via membrane push-buttons on the

faceplate of the switch as shown in the following figure:

Diagram 5.2 Programming Functions

Switch Status LED

On = Temperature Above Setpoint

Off = Temperature Below Setpoint

Press to enter a menu

programming branch,

or change a display value

Hold for 3 seconds

to enter programming

menu. Press to step

through menu

During Normal Operation

Press for 3 Sec to Enter Setup Mode

Display Switch Point/ Window Point

During Setup Mode

: Next Step

: Change Values

Press 3 sec

Exit Setup

Orfor20sec

Press no buttons

TDD 6

FM Rev. 8/6/01

5.1.1 Changing Values in Setup Mode

When in the Setup Mode the actual values of setpoint, hysteresis, switch logic and other

functions are adjusted as required by the user. From the main menu (e.g. switching point

“SPo”), press the “▼” button to adjust that functions value. The following diagram shows

the sequence of steps required to change a value:

Diagram 5.3 Sequence to Change a Value

Speichern

Save Value

Press “▼”to get from the main menu

Set the first digit

Set the second digit

Set the third digit

Set the decimal point

location

reset value

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