Honeywell KTF20, DKF20, T7415A User Manual

T7415A / KTF20 / DKF20

CABLE-TYPE BULB TEMPERATURE SENSORS

Fig. 1. The KTF20

GENERAL

The T7415A//KTF2/DKF20 Cable-type Bulb Temperature Sensor can be used as

•immersion sensors

•return air sensors

The sensors can be employed for hot and cold water installations in the following control systems:

•Excel 5000

•MicroniK 200

•MicroniK 100

•Excel Classic

•Excel Plus

•High Performance Excel Plus

•Excel EMC

or other systems using PT1000 or NTC 20kΩ temperature sensing elements.

PRODUCT DATA

FEATURES

•PT1000 or NTC 20kΩ temperature sensing element

•Wide sensing range

•High accuracy

Models

OS no.		description	sensing range
T7415A1007		Cable-type Bulb PT1000	-20...+100 °C
		Temperature Sensor	(-4...+212 °F)
T7415A1015		Cable-type Bulb PT1000	-20...+300 °C
		Temperature Sensor	(-4...+572 °F)
KTF20		Cable-type Bulb NTC20kΩ	-20...+100 °C
		Temperature Sensor	(-4...+212 °F)
DKF20		Cable-type Bulb NTC20kΩ	-20...+100 °C
		Mean value Sensor	(-4...+212 °F)
KTF20-B		Bulk shipment of 50 KTF20	see above

SPECIFICATION

Nominal value
PT1000	1000 Ω at 0 °C
NTC20kΩ	20 kΩ at 25 °C
Accuracy
PT1000	IEC751 Class B
	0.3 K +0.5% • |t| (t in °C)
NTC20kΩ	0.3 K at 25 °C
Sensitivity
PT1000	≈ 3.85 Ω / K
NTC20kΩ	≈ -934.5 Ω / K at 25 °C (non-linear)
Response time	τ0.5
immersion well app.		≈ 10 s
duct application	τ0.5	≈ 2 min at air velocity

of 1 m/s (3.3 ft/s)

Electrical connection

T7415A/KTF20	2 m cable, 2-core
DKF20	2 m cable, 3-core
Ambient Limits (wiring box)
Storage temperature	-25...+70 °C (-13…+158 °F)
Humidity	5…95% rh, non-condensing
Safety	IP64 as per EN 60529
Dimensions	see Fig. 2 on page 2

® U.S. Registered Trademark		EN0B-0362GE51 R0907
Copyright © 2007 Honeywell Inc. • All rights reserved

T7415A / KTF20 / DKF20 CABLE-TYPE BULB TEMPERATURE SENSORS

DIMENSIONS

Cable-Type Bulb Sensor

6.5	brass bulb	PVC cable with identifier
(0.26”)
		6
	60.5 (2.38”)	(0.24”)
		30 (1.18”)
	2000 (78.74”)

Fig. 2. Dimensions of the cable-type bulb sensor in mm (inches)

INSTALLATION

wiring run	max. length
Sensor to controller	200 m (660 ft)

Offset due to wire resistance per 10 m of distance from sensor to controller, when using the T7415A (PT100):

type of wire		temperature offset PT100
0.5 mm2	(AWG20)	0.18 °C (0.324 °F)
1.0 mm2	(AWG17)	0.09 °C (0.162 °F)
1.5 mm2	(AWG15)	0.06 °C (0.108 °F)

WIRING OF DKF20

controller no. 1

controller no. 2

brown (1)

green (2)

white (3)

INSTALLATION OF KTF20/DKF20

Fig. 3. KTF20 / DKF20 mounting into the immersion well

NOTE: Use shielded wiring in areas with high EMI. Keep 15 cm (5.9’’) minimum distance between sensor lines and 230 Vac power lines.

Fig. 4. Sensor branching for two separate controllers with DKF20 Fig. 5. Averaging with 2 x DKF20

Manufactured for and on behalf of the Environmental and Combustion Controls Division of Honeywell Technologies Sàrl, Ecublens, Route du Bois 37, Switzerland by its Authorized Representative:

Automation and Control Solutions

Honeywell GmbH

Böblinger Straβe 17

D-71101 Schönaich

Phone: [phone]

Fax: [phone]

http://ecc.emea.honeywell.com

Subject to change without notice. Printed in Germany

EN0B-0362GE51 R0907