LumaSense technologies M310-HT User Manual

MANUAL

M310-HT

Blackbody Calibration Source

Confidential Information

The material contained herein consists of information that is the property of LumaSense
Technologies, an Advanced Energy Company, and intended solely for use by the purchaser of
the equipment described in this manual.

All specifications are subject to change without notice. Changes are made periodically to the
information in this publication, and these changes will be incorporated in new editions.

LumaSense Technologies prohibits the duplication of any portion of this manual or the use
thereof for any purpose other than the operation or maintenance of the equipment described
in this manual, without the express written permission of LumaSense Technologies or Advanced
Energy Industries, Inc.

Any unauthorized use of this manual or its contents is strictly prohibited.

Copyright

© 2018 LumaSense Technologies, Inc. All Rights Reserved. LumaSense Technologies, Inc., a
subsidiary of Advanced Energy Industries, Inc.

Trademarks

Mikron is a trademark of LumaSense Technologies.

All other trademarks are trademarks, registered trademarks, and/or service marks of their
respective holders.

Service Centers

LumaSense Technologies, Inc.

North America
Sales & Service

Santa Clara, CA, USA
Ph: [phone]
Ph: [phone]
Fax: [phone]

LumaSense Technologies GmbH

Other Than North America
Sales & Support

Frankfurt, Germany
Ph: [phone]
Fax: [phone]

Global and Regional Centers

Our Headquarters

LumaSense Technologies, Inc.
Santa Clara, CA, USA
Ph: [phone]
Fax: [phone]

Americas, Australia, & Other Asia

LumaSense Technologies, Inc.
Santa Clara, CA, USA
Ph: [phone]
Fax: [phone]

Europe, Middle East, Africa

LumaSense Technologies GmbH
Frankfurt, Germany
Ph: [phone]
Fax: [phone]

France

LumaSense Technologies Sarl
Erstein, France
Ph: [phone]

Fax: [phone]

India

LumaSense Technologies, India
Mumbai, India
Ph: +

91 22 67419203

Fax: + 91 22 67419201

China

LumaSense Technologies, China
Shanghai, China
Ph: [phone]

Fax: [phone]

E-mail

[e-mail]

[e-mail]

[e-mail]

Website

http://www.LumaSenseinc.com

Part No 11180-19 EN
Revision D
November 2018

M310-HT Manual Contents • iii

Contents

1 General Information ......................................................................................................... 5

1.1 Information about the user manual ....................................................................... 5

1.1.1 Legend ...................................................................................................................... 5

1.2 Safety ......................................................................................................................... 5

1.2.1 Safety Notifications/Warnings ................................................................................ 5

1.3 Limit of Liability and Warranty ............................................................................... 6

1.4 Unpacking the Instrument ....................................................................................... 6

1.5 Service Request, Repair, or Support ....................................................................... 6

1.6 Shipments to LumaSense for Repair ...................................................................... 7

1.7 Transport, Packing, Storage .................................................................................... 7

1.8 Disposal / decommissioning .................................................................................... 7

2 Introduction ....................................................................................................................... 9

2.1 CE Declaration ........................................................................................................... 9

2.2 Technical Data ........................................................................................................... 9

2.3 Dimensions .............................................................................................................. 10

3 Installation ....................................................................................................................... 11

3.1 Air Outlet Clearance ............................................................................................... 11

3.2 Line Voltage ............................................................................................................ 11

3.3 RS232C Communication ......................................................................................... 11

4 Operation ......................................................................................................................... 13

4.1 Getting Started ....................................................................................................... 13

4.1.1 Front Panel Push Buttons ...................................................................................... 13

4.2 Changing the Setpoint ........................................................................................... 13

4.3 PID Tuning Constants ............................................................................................. 13

4.4 Shutting Down ........................................................................................................ 14

5 Communications Port ..................................................................................................... 15

5.1 RS232C...................................................................................................................... 15

5.1.1 Serial Communications Settings ........................................................................... 16

6 Maintenance .................................................................................................................... 17

6.1 Cavity Life ................................................................................................................ 17

6.2 Safety Interlocks ..................................................................................................... 17

6.3 Periodic Inspections ................................................................................................ 17

6.4 Fuse Locations ......................................................................................................... 17

6.5 Cleaning ................................................................................................................... 17

6.6 Heater Element Replacement ................................................................................ 17

Appendix A: Calibration & Emissivity ................................................................................. 19

M310-HT Manual Contents • iv

Radiometric Method: ...................................................................................................... 19

Calibration Certificate ......................................................................................................... 19

Emissivity (for M310, M315, M316 series blackbodies) .............................................. 20

Accuracy at all wavelengths ............................................................................................... 20

Using the M310 to calibrate “fixed emissivity” pyrometers ............................................ 23

Background Influence On Apparent Emissivity ................................................................. 24

Appendix B: Sample Communication Program ................................................................. 25

Index ....................................................................................................................................... 29

M310-HT Manual General Information • 5

1 General Information

1.1 Information about the user manual

Congratulations on choosing the high quality and highly efficient Mikron blackbody.

This manual provides important information about the instrument and can be used as a work of
reference for installing, operating, and maintaining your blackbody. It is important that you
carefully read the information contained in this manual and follow all safety procedures before
you install or operate the instrument.

To avoid handling errors, keep this manual in a location where it will be readily accessible.

1.1.1 Legend

Note: The note symbol indicates tips and useful information in this manual. All notes
should be read to effectively operate the unit.

Warning/Caution/Danger: Denotes information critical to avoiding damage to the
equipment or avoiding personal injury. When this symbol is found on the
instrument it indicates a potential hazard. Consult the documentation before
proceeding with any actions.

Protective earth: Provided for identification of the protective earth (green or
green/yellow) supply system conductor.

1.2 Safety

This manual provides important information on safely installing and operating the
M310-HT blackbody. Several sections of this manual provide safety warnings to avert danger.
These safety warnings are specified with a warning symbol. You must read and understand the
contents of this manual before operating the instrument even if you have used similar
instruments or have already been trained by the manufacturer.

It is also important to continually pay attention to all labels and markings on the instrument and
to keep the labels and markings in a permanent readable condition.

Warning: The blackbody is only to be used as described in this manual. It is
recommended that you only use accessories provided by the manufacturer.

1.2.1 Safety Notifications/Warnings

• In addition to presenting a potential fire hazard, high voltage and high temperature

can damage equipment and cause severe injury or death. When using this
instrument, follow all instructions carefully.

• Do not use the M310 for any purpose other than the function for which it was

designed: a high temperature blackbody radiance temperature source.

• Only replace the power cable with an equal, approved cable.

• Only remove cabinet covers during operation for troubleshooting.

M310-HT Manual General Information • 6

Warning: High voltages and currents are present inside the enclosure.

• Do not attempt to operate with any of the safety features bypassed or disconnected.

• Do not place this unit where it will be subject to excessive shock, vibration, dirt,

moisture, oil, or other liquids.

1.3 Limit of Liability and Warranty

All general information and notes for handling, maintaining, and cleaning this instrument are
offered according to the best of our knowledge and experience.

All Mikron blackbodies from LumaSense Technologies have a regionally effective warranty
period. Please check our website at http://info.LumaSenseinc.com/warranty

for up-to-date
warranty information. This warranty covers manufacturing defects and faults which arise during
operation, only if they are the result of defects caused by LumaSense Technologies.

The warranty is VOID if the instrument is disassembled, tampered with, altered, or otherwise
damaged without prior written consent from LumaSense Technologies; or if considered by
LumaSense Technologies to be abused or used in abnormal conditions.

1.4 Unpacking the Instrument

When unpacking and inspecting your system components, you need to do the following:

1. Check all materials in the container against the enclosed packing list.

Note: LumaSense Technologies cannot be responsible for shortages against the
packing list unless a claim is immediately filed with the carrier. Final claim and
negotiations with the carrier must be completed by the customer.

2. Carefully unpack and inspect all components for visible damage.

3. Save all packing materials, including the carrier’s identification codes, until you have

inspected all components and find that there is no obvious or hidden damage.

Note: Before shipment, each instrument is assembled, calibrated, and tested at the
LumaSense Factory. If you note any damage or suspect damage, immediately contact
the carrier and LumaSense Technologies, Inc.

1.5 Service Request, Repair, or Support

Contact LumaSense Technologies Technical Support in case of a malfunction or service request.
Provide clearly stated details of the problem as well as the instrument model number and serial
number. Upon receipt of this information, Technical Support will attempt to locate the fault
and, if possible, solve the problem over the telephone.

If Technical Support concludes that the instrument must be returned to LumaSense Technologies
for repair, they will issue a Return Material Authorization (RMA) number.

Return the instrument upon receipt of the RMA number, transportation prepaid. Clearly
indicate the assigned RMA number on the shipping package exterior. Refer to Section 1.6,
Shipments to LumaSense for Repair, for shipping instructions.

M310-HT Manual General Information • 7

Technical Support can be contacted by telephone or email:

Santa Clara, California

• Telephone: [phone] or [phone]

• Email: [e-mail]

Frankfurt, Germany

• Telephone: [phone]

• Email: [e-mail]

1.6 Shipments to LumaSense for Repair

All RMA shipments of LumaSense Technologies instruments are to be prepaid and insured by
LumaSense assigned shipper. For overseas customers, ship units air-freight, priority one.

The instrument must be shipped in the original packing container or its equivalent. LumaSense
Technologies is not responsible for freight damage to instruments that are improperly packed.

Contact us to obtain an RMA number (if one has not already been assigned by Technical
Support). Clearly indicate the assigned RMA number on the shipping package exterior.

Send RMA Shipments to your nearest technical service center:

Santa Clara, California Frankfurt, Germany

LumaSense Technologies, Inc.
3301 Leonard Court
Santa Clara, CA 95054 USA
Telephone: [phone]
[phone]

Email: [e-mail]

LumaSense Technologies GmbH
Kleyerstr. 90
60326 Frankfurt
Germany
Telephone: [phone]

Email: [e-mail]

1.7 Transport, Packing, Storage

With faulty shipping, the instrument can be damaged or destroyed. To transport or store the
instrument, please use the original box or a box padded with sufficient shock-absorbing
material. For storage in humid areas or shipment overseas, the device should be placed in
welded foil (ideally along with silica gel) to protect it from humidity.

The blackbody is designed for a storage temperature of -20 to 80 °C with non-condensing
conditions. Storing the instrument out of these conditions can cause damage or result in
malfunction of the blackbody.

1.8 Disposal / decommissioning

Inoperable Mikron blackbodies must be disposed of in compliance with local regulations for
electro or electronic material.

M310-HT Manual General Information • 8

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M310-HT Manual Introduction • 9

2 Introduction

The M310-HT is a portable blackbody calibration source utilizing a digital indicating
temperature controller that may be set to any temperature between ambient temperature to
450 °C (842 °F). A precision RTD temperature sensor is embedded in the blackbody emitter
providing high accuracy and repeatability. The temperature controller uses the industry
standard PID algorithms to control the emitter temperature to within +/- 0.1 °C. The blackbody
emitter mechanism uses a resistive heating device that provides long life, short stabilization
times and stable temperature control.

Temperature setpoints are altered simply by pressing the ↑ or ↓ arrow buttons on the controller.
The lower display is the setpoint and the upper display is the actual blackbody emitter
temperature.

2.1 CE Declaration

For information on the current CE certification, visit www.lumasenseinc.com.

2.2 Technical Data

Temperature Range:

Ambient + 5 ... 450 °C (+ 9 ... 842 °F)

Temperature Uncertainty1:

0.25% of reading ± 1 °C

Display Accuracy vs. NIST
Calibration:

See supplied NIST calibration report
Temperature Resolution:

0.1 °C

Stability2:

0.3 °C per 8 hour period

Source Non-Uniformity:

Approximately ± 1 °C @ 250 °C or ± 2 °C @ 400 °C

Exit Port Diameter:

76 mm (3.00 in)

Heated Emitter Shape:

Flat Plate

Emissivity ε:

1.00 effective emissivity @ 8 ... 14 μm

Standard Calibration Method:

Radiometric @ 8 ... 14 μm

Temperature Sensor:

Precision platinµm RTD

Warm-up Time:

< 30 minutes ambient to 400 °C

Slew Rate to 1 °C Stability:

Approximately 6 min for a + 50 °C change

Slew Rate to 0.1 °C Stability:

Approximately 10 min for a + 50 °C change

Remote Set Point:

Via RS232

Method of Control:

Digital PID Controller

Operating Ambient Temp.:

0 ... 44 °C (30 ... 110 °F)

Cooling:

Fan cooled, air inlet on rear panel

Operating Humidity:

90% RH max, non-condensing

Power Requirements:

115 V AC ±10% 50/60 HZ 920 VA fused max., 600 W heater
(230 V AC Optional)

Dimensions (H x W x D):

207.3 mm x 280.4 mm x 266 mm (8.2” x 11” x 10.5”)

Weight:

5.6 kg (12.4 lbs)

CE Certified:

Yes

Power Requirements:

115 V AC ± 10% 50 & 60 Hz 920 VA fused max, 600 W heater

(230 V AC Optional)

1

Accuracy calibration performed radiometrically, the uncertainty of emissivity and transfer standard are

already included.

2

Provided stable AC mains voltage and minimum air flow across the exit port or emitter plate.

M310-HT Manual Introduction • 10

2.3 Dimensions

M310-HT Front Panel

M310-HT Back Panel

M310-HT Manual Installation • 11

3 Installation

Select a stable location on which to place the M310-HT. Since any blackbody source stability can
be affected by moving air currents near the emitter, avoid locations where air currents are active
such as near vents, walkways for people, etc.

Warning: Do not locate this unit where it is subject to excessive shock, vibration,
dirt, moisture, oil or other liquids.

3.1 Air Outlet Clearance

The heating system requires constant air flow in the enclosure for proper operation. The air
outlet (fan) on the rear panel must not be obstructed. Allow at least 3 inches clearance for the
outlet region. Blocking this port will degrade performance and cause failures.

3.2 Line Voltage

Read the specification label on the rear panel to ensure the AC LINE voltage you are about to
use matches the voltage on the M310-HT label (100 or 115 or 230 V AC at 500 W maximum).

3.3 RS232C Communication

The M310-HT has a serial communication port for automating the calibration process using a PC.
Wiring to this port is covered in the section on Serial Communications Settings.

M310-HT Manual Installation • 12

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M310-HT Manual Operation • 13

4 Operation

4.1 Getting Started

1. Allow the M310-HT to warm-up to room temperature for at least two hours after

unpacking and prior to applying power to remove any condensation.

2. Connect the power cable to a V AC service that matches the power requirement

specification noted in the Technical Data section and on the Specification Label
located on the rear of the M310-HT.

3. Power the M310-HT by turning on the power switch on the front panel. The controller

will go into self test mode, the fan in the rear will start-up and the blackbody will start
to go the temperature setpoint that was last used prior to power down. The upper
display is the current emitter temperature. The lower display is the setpoint
temperature.

4.1.1 Front Panel Push Buttons

PAGE

Engages access to controller parameters. Do not alter any
configurations.

SCROLL

Engages access to menu items underneath the Page menu.
No need to use this button.

DWN/UP

Used to raise and lower the temperature setpoint.

4.2 Changing the Setpoint

To change the temperature setpoint (lower display), Press either the DWN/UP buttons on the
controller. Each press will advance the setpoint 0.1 degree. To advance faster, press and hold for
5 seconds until it advances a few degrees/second. Let go when it is near the desired setpoint.
Press again to bring it to the exact value desired. Note that this setpoint will be retained when
power is turned off.

4.3 PID Tuning Constants

The PID tuning constants have been factory set for optimum performance. Altering these
parameters will void the warranty and will require assistance from LumaSense to restore it.

Blackbody Temperature

Setpoint Temperature

M310-HT Manual Operation • 14

4.4 Shutting Down

Make the setpoint lower than 50 °C. Wait until the temperature falls below about 100 °C.

Turn off power using the power ON/OFF switch.

Warning: DO NOT UNPLUG THE M310! The blackbody has a cooling fan that

remains active until it is powered off. If the power is interrupted by external

means, this cooling will not occur and the devices in the enclosure may overheat. If
power fails during high temperature use, remove the top, rear cover plate to allow

better convection cooling until the blackbody is cool.

M310-HT Manual Communications Port • 15

5 Communications Port

5.1 RS232C

This blackbody may have the option to communicate with the temperature controller via a PC or
similar device. The DB-9 male connector is on the rear panel. Wiring is shown below. It is wired
to operate with a standard through cable (not null modem). This method allows bi-directional
data transfer via a three conductor cable consisting of signal ground, receive input and transmit
output. It is recommended for communication distances less than fifty feet between the
computer terminal and the instrument.

Note: Multiple instruments cannot be connected to the same port.

The RS232 port is optically isolated to eliminate ground loop problems. Typically, “DATA OUT”
of the computer/terminal connects to the “RCV” terminal on the instrument. “DATA IN”
connects to the “XMT” terminal. If shielded cable is used, it should be connected to the frame
ground at one end only. Signal ground is to be connected at appropriate ground terminals. The
blackbody frame ground is the shield connection for the communication port.

RS232 Wiring

M310-HT Manual Communications Port • 16

5.1.1 Serial Communications Settings

The communication settings are preset in our factory for 9600, E,7,1 and Address = 1.

You may download our Blackbody Communications program from this location:

http://files.mikroninfrared.com/Blackbody/BlackbodyCommsSoftware-ver3.zip

Connect your USB to RS232 converter to an open USB port on your PC. Your Eurotherm
controller is set to EiBisync, 9600 Baud. The software manual is included with the download.

Blackbody Serial Communication Software

M310-HT Manual Maintenance • 17

6 Maintenance

6.1 Cavity Life

The life expectancy of the cavity depends on the time and temperature of operation. The higher
the temperature, the shorter the life span. At temperatures near the upper end of the range,
the life expectancy is shortened by approximately 30%.

6.2 Safety Interlocks

Automatic shut-down will occur if the region near the cavity housing exceeds ~115 °C. This
thermal fuse must be replaced when over-temperature causes a shut down. The cooling fan will
operate when power is on.

6.3 Periodic Inspections

Check periodically and upon every start up for unusual noises and smells when applying power.

6.4 Fuse Locations

The M310 has one or two fuses. Refer to the table below.

Fuse Number

Amps/volts

Location

Description

F1 (120 V) 8A / 250 V AC Fast External-Rear Panel Integral with IEC power connector
F2 (120 V) NONE NONE NONE
F1 (230 V) 4A / 250 V AC Fast External-Rear Panel Integral with IEC power connector
F2 (230 V) 4A / 250 V AC Fast

6.5 Cleaning

Clean the outside of the cabinet with mild soapy solution and water only. Do not attempt to
clean the emitter plate.

6.6 Heater Element Replacement

The M310-HT heating element is not field replaceable since the cavity and elements are an
integral assembly. Contact LumaSense for service if the heating element fails. (Check continuity
of the thermal fuse first.)

M310-HT Manual Maintenance • 18

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M310-HT Manual Appendix A: Calibration & Emissivity • 19

Appendix A: Calibration & Emissivity

Radiometric Method:

In this method, calibration is based on the energy radiated from the emitter surface at a desired
spectral band. This emitted radiation is compared with the primary blackbody calibration source
with emissivity of greater than 0.998, using a precision transfer standard. The advantage of this
technique is that the characteristic of emitter emissivity has already been calibrated into the
system. An apparent emissivity of greater than 0.995 can be achieved. Recalibration or field
calibration using this technique is more difficult and elaborate since highly precision primary
blackbody calibration sources and transfer standard are needed.

This blackbody was calibrated radiometrically.

Calibration Certificate

The certificate of calibration of your blackbody source has been included with the shipment.

This certificate contains valuable information including traceability to NIST. Please observe
recommended date of next calibration.

M310-HT Manual Appendix A: Calibration & Emissivity • 20

Emissivity (for M310, M315, M316 series blackbodies)

Accuracy at all wavelengths

When measurements are required at wavelengths other than the one used for factory
radiometric calibration the graph below provides emissivity vs. wavelength for this model.
Integrating over the wavelength region of interest will provide the average emissivity for your
measurement. If the blackbody was calibrated radiometrically, the apparent emissivity at
8-14 µm was normalized to 1.0. The target emissivity vs. wavelength can be read directly from
the graph. Again, you would have to normalize the mean emissivity between 8 and 14 µm to

1.0, then correct for other wavelength regions. The next two pages have examples that do this
normalization for you.

When calibrating infrared sensors at wavelengths other than 8-14 µm region, the graph below
displays the target effective emissivity vs. wavelength after factory radiance calibration is
performed.

Infrablack 3 Coating on HT version (450C)

0.9

0.91

0.92

0.93

0.94

0.95

0.96

0.97

0.98

0.99

1

0

5 10 15 20 25 30

Wavelength (um)

emissivity

'emissivity'

mean emissivity=0.915

3-5um

8-14um
e=0.970

8-12um
e=0.969

M310-HT Manual Appendix A: Calibration & Emissivity • 21

Example 1: The M310HT (450 °C) blackbody was factory calibrated to provide effective

emissivity = 1.0 at 8-14 µm. You wish to use this source for a narrow band pyrometer at 7.5 µm.
At this wavelength from the graph above, the blackbody exit radiance will be approximately
equivalent to a blackbody that has emissivity = 1.011. This will cause your pyrometer to receive

1.1% more infrared energy causing it to read a higher temperature. The table below shows the
expected error. At 250 °C, this pyrometer will read 251.4 °C or 1.4 °C high, so you should set the
blackbody setpoint to 248.6 °C (250-1.4).

Normalized emissivity after 8-14um radiance calibration on the HT (450C) version

0.92

0.93

0.94

0.95

0.96

0.97

0.98

0.99

1

1.01

1.02

0 5 10 15 20 25 30

e

M310-HT Manual Appendix A: Calibration & Emissivity • 22

Example 2: The M310-HT (450 °C) blackbody was factory calibrated to provide effective

emissivity = 1.0 at 8-14 µm. You wish to use this source for an imager that has spectral response
of 3-5 µm. The mean value between 3-5 µm from the graph above = 0.943. The blackbody exit
radiance at 3-5 µm will be approximately equivalent to a blackbody that has emissivity = 0.943.
This will cause your imager to receive 5.7% less infrared energy causing it to read a lower
temperature. The table below shows the expected radiance temperatures and errors. At 250 °C,
your imager will read 245.5 or 4.5° low so you should set the blackbody setpoint to

254.5 = (250 + 4.5) to force the exit radiance to be equal to 250 °C at 3-5 µm.

M310-HT Manual Appendix A: Calibration & Emissivity • 23

Using the M310 to calibrate “fixed emissivity” pyrometers

For convenience, the table below shows what setpoint to use when calibrating pyrometers
(infrared thermometers) that have fixed emissivity at 0.95 (and operate at 8-14 µm wavelength).
This table assµmes the ambient and background are at 23 °C. If your pyrometer has adjustable
emissivity, do not use this table and set your pyrometer emissivity to 1.0.

M310-HT Manual Appendix A: Calibration & Emissivity • 24

Background Influence On Apparent Emissivity

When using a blackbody source at temperatures well above ambient, common sense dictates
how the blackbody will behave. When using a source close to ambient temperatures, different
things happen. Since the background such as the room, wall, and you could be warmer than the
blackbody emitter, the energy emitted from the emitter is the sum of the background reflection
and the emitter temperature. When emitter emissivity is less than 1.0, the background energy
times (1-emissivity) reflects to the device under calibration. For this reason, the M310-HT may
appear to have a higher “apparent emissivity” near ambient than when operated at higher
temperatures.

M310-HT Manual Appendix B: Sample Communication Program • 25

Appendix B: Sample Communication

Program

This is a typical QBASIC program that reads current temperature.

This program is provided for example only for extraction of code lines for your use. It is not
intended to be an attractive user interface program. It is, however, a working program.

CLS
'-------set comm port to 9600, 7,E,1---------­OPEN "COM1:9600,E,7,1,CD,CS,DS,RS" FOR RANDOM AS #1 LEN = 512

'-------make a request for blackbody temperature string---­w$ = CHR$(4) + "0011PV" + CHR$(5)
'----chr$(4) is ascii diamond symbol­'----chr$(5) is ascii club symbol­'-----chr$(n) is the hex value of n taken from the table section 4.1.5 in Eurotherm
'-----comm instruction manual

'-----send request string(w$) to comm port-----------­PRINT #1, w$

'-----display the string (w$)-------­PRINT w$

'-----waste time for return data from controller------­FOR y = 0 TO 100000
NEXT y
BEEP

'-----clear input reading string (R$)------­R$ = ""

'-----collect input data from controller one byte at a time---­WHILE LOC(1) = 0
WEND
C = LOC(1)
PRINT C
R$ = R$ + INPUT$(C, #1)
BEEP

'------display the string from received from controller-------­ PRINT R$

'-----format the string to real numbers to display bb temperature--­'WEND
'pv$ = getread$
'pv = VAL(MID$(pv$, 4, 6))
'PRINT pv$, pv

M310-HT Manual Appendix B: Sample Communication Program • 26

'-----close the comm port (if finished)---------­CLOSE #1

The following program writes setpoint value.

CLS
'-----open comm port 1 for 9600 baud, 7,E,1----­OPEN "COM1:9600,E,7,1,RS,CS,DS" FOR RANDOM AS #1

inman:
'-----enter desired setpoint as a string--­INPUT "Enter setpoint temperature (EXIT to quit) "; sp$

'-----always make it upper case for text entry--­IF UCASE$(sp$) = "EXIT" THEN GOTO endman

'-----make the setpoint a number---­sp = VAL(sp$)

'-----retry if the entry was out of range of the blackbody-­IF sp < 10 OR sp > 750 THEN PRINT "invalid entry": GOTO inman

'format setpoint to match controller
'---display the setpoint-­PRINT sp

'-----make a string that is 100 times the sp value--­sp = sp * 100
spi = FIX(sp)
spi$ = STR$(spi)

'-----extract the two decimal values (.nn) from the string-­decpt$ = RIGHT$(spi$, 2)

'-----extract the integer values from the string-­integer$ = MID$(spi$, 2, LEN(spi$) - 3)

'-----generate the variable setpoint set string (SLnn.nn(ascii 'heart symbol'))
setpoint$ = "SL" + integer$ + "." + decpt$ + CHR$(3) 'generate partial sp string
'-----chr$(n) is the hex value of n taken from the table section 4.1.5 in 'Eurotherm
'-----comm instruction manual

'generate checksum (if needed)
x = 0
FOR c = 1 TO LEN(setpoint$)
x = x XOR ASC(MID$(setpoint$, c, 1))
NEXT c

' The "0011" in the string below is address 01. To talk to address 02, use 0022
' (Each address digit is reapeated for confirmation)
' To send to address 03, use "0033".
' To send to address 04, use "0044".
' To send to address 15, use "1155", etc.

M310-HT Manual Appendix B: Sample Communication Program • 27

'-----generate the full setpoint string-­setpoints$ = CHR$(4) + "0011" + CHR$(2) + setpoint$ + CHR$(x) 'full setpoint string
'-----chr$(4) is diamond symbol
'-----chr$(2) is 'happy face' symbol

'---display the setpoint string--­PRINT "string sent="; setpoints$

'----send the string to controller--­start:
PRINT #1, setpoints$ 'send to controller

'---repeat as required-­GOTO inman
endman:
CLOSE 1

M310-HT Manual Appendix B: Sample Communication Program • 28

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M310-HT Manual Index • 29

Index

A

Air Outlet Clearance 11
Apparent Emissivity 24
Appropriate use 9

B

Background Influence 24

C

Cavity life 17
Cleaning 17
Communications Port 15

D

Dimensions 10
Disposal 7

F

Fuse Locations 17

G

General Information 5

H

Heater Element 17

I

Inspections 17

L

Liability 6
Line Voltage 11

M

Maintenance 17

O

Operation 13

P

Packing 7
PID Tuning Constants 13
Push buttons 13

R

Repair 6, 7
RS232C 11, 15

S

Safety 5
Safety Interlocks 17
Service Request 6
Setpoint 13
Shutting Down 14
Starting Up 13
Storage 7
Support 6

T

Technical Data 9
Transport 7

U

Unpacking the Instrument 6

W

Warnings 5
Warranty 6