Installation Instructions

ManualsBrandsSiemens ManualsSensors TemperatureSurface Mount Temperature Sensor Installation Instructions

Document No. 129-460

December 12, 2017

Surface Mount Temperature Sensor

Item Number 129-460, Rev. EA Page 1 of 3

Product Description

The Surface Mount Temperature Sensor mounts

directly on a pipe inlet and senses the temperature

of water in the pipe.

Product Number

Product Number Output Signal

QAD2030U

10k Ω NTC Type II

Thermistor

QAD2032U

10k Ω NTC Type III

Thermistor

QAD2012U

1k Ω Pt RTD (385α)

QAD2020U

1k Ω @ 32°F Ni RTD

QAD2021U

1k Ω @ 70°F Ni RTD

536-780 4 to 20 mA (30°F to 250°F)

544-089

1k Ω Pt RTD (375α)

Contents

Description Quantity

Sensor 1

Mounting Kit:

•

Junction box

•

Strap

•

Wire nuts

•

No. 20 stretch tape

1 roll

NOTE: 536-780 also includes 4 to 20 mA

transmitter and two additional wire nuts.

Required Tools

• Wire cutters

• Knife

• Duct tape

• Wire brush, sandpaper or other abrasive tool

• Medium flat-blade screwdriver

Expected Installation Time

13 minutes

Prerequisite

If the pipe is not insulated, a 12-inch to 18-inch

(30 cm to 46 cm) piece of insulation will be needed

to ensure an accurate temperature reading. The

insulation should be at least one-inch (25 mm) thick.

Installation

NOTE: To ensure accuracy, the sensor must be

mounted under insulation, away from drafts.

Do not cut any wire from the sensor.

1. If the pipe is insulated, remove a portion of the

insulation by making two cuts around the

circumference of the pipe (between 6 inches

and 12 inches [15 cm and 30 cm] apart).

2. Make a third cut perpendicular to the first two

cuts so that the insulation can be removed in

one piece. See Figure 1. Save this piece.

Figure 1. Cutting the Insulation.

Summary of content (3 pages)

PAGE 1
Installation Instructions Document No. 129-460 December 12, 2017 Surface Mount Temperature Sensor Product Description Expected Installation Time The Surface Mount Temperature Sensor mounts directly on a pipe inlet and senses the temperature of water in the pipe. 13 minutes Product Number If the pipe is not insulated, a 12-inch to 18-inch (30 cm to 46 cm) piece of insulation will be needed to ensure an accurate temperature reading. The insulation should be at least one-inch (25 mm) thick.
PAGE 2
Document No. 129-460 Installation Instructions December 12, 2017 Installation, Continued 3. Using an abrasive tool, clean the surface of the pipe where the sensor is to be mounted to ensure good contact with the pipe. See Figure 2. 2. Thread the strap through the junction box and attach the junction box to the pipe. See Figure 3. Figure 2. Pipe Temperature Sensor. 4. Bend the sensor wires back along the pipe next to the sensor for strain relief. See Figure 2. 5.
PAGE 3
Document No. 129-460 Installation Instructions December 12, 2017 7. For 536-780 only, Connect the wires from the sensor to the appropriate RTD leads of the transmitter with wire nuts. Connect the field wiring to the transmitter. The positive (+) 26V supply lead goes to the PWR wire of the transmitter, and the negative signal lead goes to the SIG wire. See Figure 5. Figure 5. 536-780 (4 to 20 mA Output) Only. The installation is now complete.