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Summary of Contents for Measurement Computing WLS-TC
- Page 1 WLS-TC Wireless Thermocouple Measurement User's Guide Document Revision 4A April 2014 © Copyright 2014...
- Page 2 Other product and company names mentioned herein are trademarks or trade names of their respective companies. © 2014 Measurement Computing Corporation. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form by any means, electronic, mechanical, by photocopying, recording, or otherwise without the prior written permission of Measurement Computing Corporation.
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Page 3: Table Of Contents
Overview: WLS-TC features ..........................6 Remote wireless operation ..............................6 WLS-TC block diagram ............................. 7 Chapter 2 Installing the WLS-TC ........................... 8 What comes with your WLS-TC shipment? ....................... 8 Hardware ..................................8 Software .................................... 8 Documentation .................................. 8 Unpacking................................8 Installing the software ............................ - Page 4 WLS-TC User's Guide Chapter 5 Specifications ............................18 Analog input ..............................18 Channel configurations ............................. 18 Accuracy ................................19 Thermocouple measurement accuracy ..........................19 Throughput rate to PC (USB or wireless) ......................19 Digital input/output............................20 Temperature alarms ............................20 Memory ................................20 Microcontroller ..............................
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Page 5: Preface
Preface About this User’s Guide What you will learn from this user's guide This user's guide describes the Measurement Computing WLS-TC data acquisition device and lists device specifications. Conventions in this user's guide For more information Text presented in a box signifies additional information related to the subject matter. -
Page 6: Introducing The Wls-Tc
The digital I/O channels are software programmable for input or output. With the WLS-TC, you can take measurements from type J, K, R, S, T, N, E, and B thermocouples. The WLS-TC provides two integrated cold junction compensation (CJC) sensors for thermocouple measurements. -
Page 7: Wls-Tc Block Diagram
WLS-TC User's Guide Introducing the WLS-TC WLS-TC block diagram WLS-TC functions are illustrated in the block diagram shown here. Figure 1. WLS-TC functional block diagram... -
Page 8: Installing The Wls-Tc
PDF at www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf. Installing the hardware Before you operate the WLS-TC as a local or remote device, first install it onto your system and configure it with InstaCal. Install the MCC DAQ software before you install the WLS-TC The driver needed to run your board is installed with the MCC DAQ software. -
Page 9: Configuring The Wls-Tc
If the Command LED turns off If the Command LED is on but then turns off, the computer has lost communication with the WLS-TC. If the WLS-TC is connected to the computer USB port, disconnect the USB cable from the computer and then reconnect it. -
Page 10: Network Parameters (Remote Operation)
After configuring the network parameters, disconnect the WLS-TC from the computer, and move the device to its remote location. The WLS-TC can be located up to 150 feet (50 meters) indoors, or up to ½ mile (750 m) outdoors from the interface device. -
Page 11: Connecting The External Power Supply For Remote Operation
You can fully calibrate the WLS-TC using InstaCal. Allow a 30-minute warm up before calibrating. The normal calibration interval is once per year. You can calibrate the WLS-TC when it is connected locally to the computer through the USB port, or when it is operating remotely through the wireless interface. -
Page 12: Chapter 3 Sensor Connections
Screw terminal pinout The WLS-TC has four banks of screw terminals. There are 26 connections on each side. Between each bank of screw terminals are two integrated CJC sensors used for thermocouple measurements. Signals are identified in Figure 2. -
Page 13: Digital I/O
Figure 3. Typical thermocouple connection Connect thermocouples to the WLS-TC so that they float with respect to GND (pins 9, 19, 28, 38). The WLS- pins are isolated from earth ground, so you can connect thermocouple sensors to voltages referenced to earth ground as long as you maintain the isolation between the GND pins (9, 19, 28, 38) and earth ground. -
Page 14: Digital I/O Connections
(default). You can request the factory to configure the resistor for pull-down to ground if desired. When you configure the digital bits for input, you can use the WLS-TC digital I/O terminals to detect the state of any TTL-level input. Refer to the schematic shown in Figure 4. If you set the switch to the +5V input, DIO0 reads TRUE (1). -
Page 15: Chapter 4 Functional Details
+2.5 V to the thermocouple’s low side at the C#L input. Always connect thermocouple sensors to the WLS-TC in a floating fashion. Do not attempt to connect the thermocouple low side C#L to GND or to a ground referencing resistor. -
Page 16: Ac Power Supply
With OTD disabled, a maximum of 30 nA of input leakage current is injected into the thermocouple. AC power supply The external power supply is an AC-to-USB 2.5 W supply that is used to power the WLS-TC during remote wireless operations (MCC p/n USB Power Adapter.) External components The WLS-TC has the following external components, as shown in Figure 5. -
Page 17: Status Leds
Steady green – the WLS-TC is connected to a computer or AC adapter Command Blinking green – the WLS-TC is receiving a command over the USB or wireless link. Wireless Power (green) The WLS-TC device's internal RF module is receiving power (USB or AC adapter) Transmit (yellow) Data is being transmitted over an active wireless link. -
Page 18: Chapter 5 Specifications
Chapter 5 Specifications All specifications are subject to change without notice. Typical for 25°C unless otherwise specified. Specifications in italic text are guaranteed by design. Analog input Table 1. Generic analog input specifications Parameter Condition Specification A/D converters Four dual 24-bit, Sigma-Delta type Number of channels 8 differential Input isolation... -
Page 19: Accuracy
WLS-TC User's Guide Specifications Accuracy Thermocouple measurement accuracy Table 3. Thermocouple accuracy specifications, including CJC measurement error Sensor Type Maximum error Typical error Temperature range –210 to 0 °C ±1.499 °C ±0.507 °C ±0.643 °C ±0.312 °C 0 to 1200 °C –210 to 0 °C... -
Page 20: Digital Input/Output
WLS-TC User's Guide Specifications Digital input/output Table 5. Digital input/output specifications Parameter Specification Digital type CMOS Number of I/O 8 (DIO0 through DIO7) Configuration Independently configured for input or output. Power on reset is input mode unless bit is configured for alarm. -
Page 21: Microcontroller
WLS-TC User's Guide Specifications Microcontroller Table 8. Microcontroller specifications Parameter Specification Type Three high performance 8-bit RISC microcontrollers Wireless communications Table 9. Wireless communications specifications Parameter Specification Communication standard IEEE 802.15.4, ISM 2.4GHz frequency band, non-beacon, point-to-point Range Indoor/urban: Up to 150 ft (50 m) Outdoor RF line-of-sight: Up to ½... -
Page 22: Power
WLS-TC User's Guide Specifications Power Table 11. Power specifications Parameter Condition Specification Connected to USB Supply current 500 mA max User +5V output voltage range Connected to a self-powered hub. (Note 10) 4.75 V min to (terminal block pin 21 and 47) 5.25 V max... -
Page 23: Mechanical
WLS-TC User's Guide Specifications Mechanical Table 14. Mechanical specifications Parameter Specification Dimensions (L × W × H) 128.52 x 88.39 × 35.56 mm (5.06 × 3.48 × 1.43 in.) USB cable length 3 m (9.84 ft) max LED / button configuration Table 15. -
Page 24: Screw Terminal Connector
WLS-TC User's Guide Specifications Screw terminal connector Table 16. Screw terminal connector specifications Parameter Specification Connector type Screw terminal Wire gauge range 16 AWG to 30 AWG Table 17. Screw terminal pinout Signal Name Pin Description Signal Name Pin Description... -
Page 25: Declaration Of Conformity
Norton, MA 02766 Category: Electrical equipment for measurement, control and laboratory use. Measurement Computing Corporation declares under sole responsibility that the product WLS-TC to which this declaration relates is in conformity with the relevant provisions of the following standards or other... - Page 26 Measurement Computing Corporation 10 Commerce Way Suite 1008 Norton, Massachusetts 02766 (508) 946-5100 Fax: (508) 946-9500 E-mail: info@mccdaq.com www.mccdaq.com...
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