Dwyer WTP-R User Manual

Bulletin W-WTP-R

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Series WTP-R Wireless Remote Probe Temperature Sensors

Specifications - Installation and Operating Instructions

The Series WTP-R Wireless Remote Probe Temperature Sensors

can be used to monitor surface temperature of water lines or in locations
where space is limited. For greater flexibility, the enclosure for the
electronics can be mounted up to 25´ from the temperature
measurement point. By sampling the temperature measurement every
10 seconds, the 3.6V lithium battery is able to power the unit for up to 8
years.

A reliable 418 MHz signal can carry the measurements up to 100 feet
without a repeater. With the optional 900 MHz repeater, measurements
can be transmitted up to 1000 feet away.

MOUNTING

Mount unit to surface using four #10 screws through the holes in the
mounting feet. For concrete or cinder block, pre-drill four 5/32˝ (4 mm)
holes to 1-3/4˝ (45 mm) depth. On duct models, only compress gasket
half of original thickness.

SPECIFICATIONS
Temperature Range: -40 to 185°F (-40 to 85°C).
Accuracy: ±0.2°C.
Temperature Limits: 32 to 140°F (0 to 60°C).
Humidity Limits: 5 to 95% RH non-condensing.
Power Requirements: 2 AA 3.6V lithium batteries.
Transmitter Interval: Approximately 10 seconds.
Housing Material: ABS plastic.
Enclosure Rating: UL 94 V-0, NEMA 4X.
Antenna: 418 MHz - Built inside enclosure.
Weight: 0.85 lb (386 g).
FCC Approval: FCC ID# T4F06811RH.
Agency Approvals: RoHS.

NOTICE

NOTICE

When inserting batteries, observe polarity
markings inside unit for proper operation.

It is best to train output modules before mounting
the transmitters.

Figure 1: Mounting Diagram

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]

Training Output Models

• Attach desired output modules to receiver as described in output
module manual.

• Apply power to the receiver and output modules (LED on receiver
should be lit. LED on output module will flash and go out).

• Open the cover of sensor and install the batteries (observe polarity).
LED next to the transmitter training button will flash every 10 seconds.

• Press and hold the plastic service button on the output module to be
programmed. At the same time, press for one second and release the
button on the sensor. When the LED on the output module lights,
release the service button. The LED on the output module will go out
after the button is released.

• Output module LED will flash when it receives data from sensor.

• Close cover when all of the output modules have been trained.

DIAGNOSTICS

Error

Temperature or humidity
reading is incorrect

Temperature reading is
coming out of wrong
output module

MAINTENANCE, CLEANING AND REPAIR

After final installation of the unit, no routine maintenance is required. A
periodic check of the system calibration is recommended. The Series
WTP-R 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.

Required Action(s)

• Check wire from output modules to
controller for proper connections and
polarities.

• Check to see if the controller’s software
is configured correctly.

• Check transmitter to see if its LED
flashes every 10 seconds. If not, change
batteries.

• Check power to the receiver and output
module.

• Check output module LED. If blinking
fast, retrain output module.

• Retrain output module.

Figure 2: Battery Polarity

©Copyright 2009 Dwyer Instruments, Inc. Printed in U.S.A. 12/09 FR# R6-443759-00

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]