Tamson Instruments E20 User manual
Tamson Instruments bv
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USER-MANUAL
E20 -Thermometer
ASTM E2877
Tamson Instruments bv
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1SAFETY AND WARNINGS .............................................................................................................................3
2WARRANTY .................................................................................................................................................... 3
3DISCLAIMER................................................................................................................................................... 3
4PRECAUTIONS AND HAZARDS ...................................................................................................................4
5INSTALLATION............................................................................................................................................... 4
5.1IMPORTANT.................................................................................................................................................4
5.2 UNPACKING ................................................................................................................................................4
6PRACTICAL USE AND PROTECTION ..........................................................................................................5
7SPECIFICATIONS........................................................................................................................................... 6
7.1 USE CONFORMING TO ASTM E2877............................................................................................................6
7.2 ACCURACY .................................................................................................................................................6
7.3 RESPONSE TIME..........................................................................................................................................6
8WHAT IS WHAT .............................................................................................................................................. 8
8.1 START ........................................................................................................................................................8
8.2 MENU STRUCTURE ......................................................................................................................................8
8.3 COMMUNICATION.........................................................................................................................................8
8.4 PROTOCOL .................................................................................................................................................9
8.5 SEND AND RECEIVE .....................................................................................................................................9
8.6 INSTALLING A RS232 TO USB CONVERTER ................................................................................................11
8.7 UNINSTALL RS232 TO USB CONVERTER....................................................................................................12
8.8 CONNECTOR CABLE...................................................................................................................................12
9CALIBRATING THE THERMOMETER.........................................................................................................13
9.1 SOFTWARE ...............................................................................................................................................13
9.2 STARTING THE TAMSON THERMOMETER TOOLBOX......................................................................................14
9.3 TAKING MEASURING POINTS.......................................................................................................................16
9.4 PROCESS THE CALIBRATION DATA ..............................................................................................................16
10 SPARE PARTS LIST .................................................................................................................................18
11 DIMENSIONS AND PERFORMANCE.......................................................................................................20
12 TROUBLE SHOOTING..............................................................................................................................21
12.1 DISPLAY SHOWS STRANGE CHARACTERS ................................................................................................21
12.2 COMMUNICATION GIVES PROBLEMS ........................................................................................................21
13 EC DECLARATION OF CONFORMITY THERMOMETER E20 THERMOMETER.................................. 22
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1 SAFETY AND WARNINGS
Make sure before installing or operating the equipment to read and understand all instructions and safety
precautions listed in this manual. If there are any questions concerning the operation of the equipment or about
the information given in this manual please contact your local dealer or our sales department first.
Performance of installation, operation, or maintenance other than those described in this manual may result in a
hazardous situation and may void the manufacturer's warranty.
Never operate equipment that is not correctly installed. Unqualified personnel must not operate the equipment.
Avoid damage to the equipment, or its accessories, caused by incorrect operation.
Important:
-When performing service, maintenance or moving the apparatus, always disconnect the apparatus at the
main's socket,
-Proper skilled and trained personnel are only allowed to operate this equipment,
-Take notice of warning labels and never remove them,
-Refer service and repairs to qualified technician,
-If a problem persists, call your supplier or Tamson Instruments b.v.
2 WARRANTY
Tamson Instruments b.v. warrants that all their manufactured equipment is free from defects in material and
workmanship, preventing the device from normal operation. Tamson Instruments b.v does not warranty that the
equipment is fit for any other use than stated in this manual. The manufacturer can only be held responsible for
the security, reliability and performance of the equipment, when operated in accordance with the operating
instructions, extensions, adjustments, changes and/or if repair is performed by Tamson Instruments b.v. or
authorized persons only. This warranty is limited to one year from the date of invoicing. All equipment and
materials are subject to standard production tolerances and variations.
3 Disclaimer
For relevant measurements always an independent reference measurement is needed. Tamson can not be held
responsible for misinterpretation or consequences of an erroneous reading
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4 PRECAUTIONS AND HAZARDS
Before attempting to operate the thermometer read all
parts of this manual carefully to insure smooth operation
and avoid damage to the equipment or its accessories.
If a malfunction occurs, consult section "Trouble shooting”,
page 21. If the problem persists email at
correctly installed. The equipment must be operated only by
qualified personnel. Avoid damage to the equipment or its
accessories through incorrect operation.
5 INSTALLATION
5.1 Important
Tamson Instruments bv is not responsible for any
consequential damage or harm caused by using this
thermometer. Repairs on the electrical system of the
thermometer may only be carried out by well trained and
authorized persons.
5.2 Unpacking
Before leaving the factory Tamson products are adequately
packed to prevent damage during normal transportation.
Check the packing for external damage and make a note on
the shipping documents if any damage is found. Always retain
the cartons and packing material until the product has been
tested and found in good condition. (Transport companies
generally will not honor a claim for damage if the respective
packing material is not available for examination).
READ
CAREFULLY
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6 PRACTICAL USE AND PROTECTION
This thermometer is a highly sensitive measuring device.
Therefore prevent shock from the thermometer body or
sensor.
Do not drop the thermometer housing.
Do not drop the thermometer sensor / probe.
The thermometer housing is of thermoplastic and sensitive to
heat. Prevent operating the thermometer at temperatures
higher than ambient.
The temperature sensor is of stainless steel. Prevent
temperatures higher than 250°C at the tip of the sensor.
Keep the thermometer away from water and dust.
Keep the serial connector and sensor connector (PT100)
away from water. Corrosion of the PT100 connector will
seriously influence the calibration.
Prevent from
high
temperatures
Prevent
shock
Prevent from
water and
moisture
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7 SPECIFICATIONS
7.1 Use conforming to ASTM E2877
The E20 Thermometer specifically is designed to be used
conforming the standard guide for digital contact
thermoemters ASTM E2877. This Guide describes general-
purpose, digital contact thermometers or “digital
thermometers” that provide temperature readings in units of
degrees Celsius or degrees Fahrenheit, or both.
The thermometer conforms to the highest accuracy class type
“A” of the described 9 classes “A” to “I”
7.2 Accuracy
For technical specifications see Dimensions and performance
page 20.
7.3 Response time
For technical specifications see Dimensions and
performance page 20.
The fast response to temperature changes of the E20
thermometer ensures a T63 response time of less than 3
seconds. That means that at least 63 percent of the
temperature change is displayed within three seconds. The
E20 thermometer is equipped with a 3 mm outer diameter
shaft. Differences in response time are indicated in figure 1.
0:00
1:00
2:00
Time [min:sec]
Temperature
T63 response
3mm shaft
6mm shaft
Massive probe
Figure 1
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The response time is a very important parameter. When using
a thick metal PT100 probe, it appears as though the
temperature reading is stable (indicated by the light green line,
figure 2). However this false stability is caused by the large
thermal mass of the probe. This thermal mass prevents rapid
temperature changes so it looks like the temperature reading
is stable. This phenomenon gives a technician a false sense
of temperature stability. It's not a stable temperature but the
PT100s' thermal mass masters the temperature fluctuations
which results a feeling of having a stable temperature. In
reality the dampened temperature fluctuations may result in
significant error during viscosity measurement. Depending on
the pt100 probe-mass misreading's in the range of 0.1°C are
easily possible.
Another disadvantage of a long response time is that it takes
longer for the thermometer to reach the true temperature. This
difference is indicated in figure 3 below
0:00
0:30
1:00
Time
[hrs:min]
Temperature
[°C]
Max
Max
Min
Min
0:00
5:00
10:00
Time [min:sec]
Temperature
Δtemperature
T63 = 3 sec
T63 = 15 sec
Figure 3
Figure 2
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8 What is what
1 Connector power / communication
2 OLED display
3 Button
4 PT100 shaft diameter 6mm
5 PT100 tip
8.1 Start
Connect the power cord to the connector on top of the
thermometer.
Connect the USB connector of the power cable to the USB
power adapter
The thermometer will light up.
8.2 Menu structure
When switched on, select the temperature readout:
Degree C, "°C"
Degree F, "°F"
Digital, "B"
8.3 Communication
The communication between PC and E20 thermometer uses
a protocol based on addresses. In the microcontroller data is
stored in EEProm using memory addresses. The
temperature is stored at memory address 376, 377, 378 en
379. Four bytes are stored at this address to form a float.
The protocol between the PC and thermometer is a copy
function as it copies a variable of bytes from or to the
computer.
The temperature is a 32 bit signed float thus four bytes of
data are exchanged
Running at 19200 baud, 8 data bits, no parity
The data from and to the PC is exchanged using a so called
package:
3
4
2
5
1
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8.4 Protocol
'Byte 1 Synchronisation, decimal 84 (this is a fixed
character)
'Byte 2 Length of package, 7..255.
Each package needs a minimum of 6 bytes
These 6 bytes are the so called overhead:
Byte1,2,3,4,5,7
A package is formed by these six bytes plus
additional data.
'Byte 3 Command
bit 0
0 = data read
1 = data write
bit 1 and 2
00 = not used
01 = Location is SRAM
10 = Location is FLASH
11 = Location is external EEPROM
'bit 3
0 = No extra routine
1 = Set Real Time Clock
'Byte 4 Address high byte
'Byte 5 Address low byte
'Byte 6 Data, the actual information - 1 to 248 bytes
'Byte 7 Checksum, all data is added, last two hex are used.
I.e. a value of &h 30D returns 0D as checksum.
8.5 Send and receive
In order to receive the actual temperature from the E20
thermometer following hex code must be send to the
thermometer:
54 0A 02 01 77 00 00 00 00 D8
(The red value "D9" is the checksum)
Now assume the thermometer reads 25.147°C, than the
response from the thermometer will be:
54 0A 02 01 77 63 2D C9 41 72
In Red the checksum
In Green the temperature indicated in hexadecimal
Please note that the LSB is send first whilst the MSB is last.
So the data must be swapped:
41 C9 2D 63
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This 32bit HEX data must be converted to a float. The value
of &H 41 C9 2D 63 is 25.1472.
One can use a HEX to Float converter like
https://gregstoll.com/~gregstoll/floattohex/
Or look at Wikipedia on how to converte a 32 bit Hex value
into a floating point.
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8.6 Installing a RS232 to USB converter
Following is needed in order to communicate with the
thermometer. In Windows 10 the driver already is standard
available when using this operating system. After plugging in
for the first time, driver files automatically are installed in the
background and after approximately 2 minutes the converter
is available.
The thermometer uses a FTDI RS232 to USB converter chip.
In order to set up the communication this driver should be
installed for previous Windows systems. So if you have
Windows 8.1 or older this so called Virtual Com Port (VCI)
should be installed before plugging in the thermometer.
Drivers are available from www.ftdi.com. See home, drivers
and then VCP Drivers.
Previous Windows versions may not install automatically.
Select to install the driver yourself. Please see the screens on
the right.
Installation is in progress
Confirm that the software isn't digitally signed
Confirm installation
Sometimes it is necessary to perform the installation
twice, as there might be one or more USB hub controllers.
If Windows asks to install for a second time this second
installation must be performed. It will not harm your
system.
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8.7 Uninstall RS232 to USB converter
Use Start, configuration screen, software.
A list will be displayed.
Select the driver, FTDIUSB Serial Converter Drivers and
perform an uninstall.
8.8 Connector cable
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9 Calibrating the thermometer
9.1 Software
Tamson instruments offers a software program to generate
IEC90 coefficients. 5 coëfficients are needed to linearize and
calibrate the E20 thermometer. To do so this program needs
5 reference temperatures at which the ADC value is read from
the Thermometer display. A shipped E20 thermometer offers
3 readings:
- Degree Centigrade, indicated with a "C"
- Degree Fahrenheit, , indicated with a "F"
- Analog to Decimal binary value, indicated with a "B"
A fourth reading, degrees Kelvin, is optional.
The temperature readout can be selected using the front
button. The digital readout [B] of the thermometer is used as
input for the calculation.
Download the file from the website by selecting it in
the download section. The description of the package is
"Tamson Thermometer Toolbox".
Save the file to disk and copy it to a specific map. The
file now must be unpacked.
Right press the "ZIP" file press the right mouse
button and choose extract all. Three files now will be
extracted.
The "TTT.ZIP" file can be dragged to the dustbin as this file
now is no longer needed.
A shortcut to the windows desktop can be made by right
clicking the "TTT.EXE" file and select "send to" and "Desktop
(create shortcut)".
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9.2 Starting the Tamson Thermometer
Toolbox
First connect the thermometer to the USB port. A cable is
supplied with a "USB -A" connector and a "RJ45 -6 pole"
connector on the other. Next start the program by a double
click on the icon on your desktop (when you made a shortcut,
see previous chapter). Or simply double click the "TTT.EXE"
to start the program.
The program will work fine under Windows 7, 8 or 10. The
computer must have a free USB port available.
Once the thermometer is connected to the PC USB use the
pull down menu "COM Port" to select the active port
Select the port to open
When the thermometer is successfully connected, the box
changes into
The software also identifies the attached thermometer:
Below this a table is offered, which will open when double
clicked
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A list of parameter now will show Depending on the user. Not
all parameters will show or can be edited.
Item
Description
Value
1
Serial
Text
2
Calibrator initial
Text
3
Low range
Numerical
4
High range
Numerical
5
Filter
Numerical 0..255
6
Temp unit
Value
7
Precision
See table [Item 7]
8
Units
See table [Item 8]
9
Coefficient A
Float
10
Coefficient B
Float
11
Coefficient C
Float
12
Coefficient D
Float
13
Coefficient E
Float
[Item 7] Settings for decimals
0
No decimals
1
1 decimal
2
2 decimals
3
3 decimals.
[Item 8] Settings for decimals
Value
Celsius
Fahrenheit
Kelvin
ADC
1
Yes
2
Yes
3
Yes
Yes
4
Yes
5
Yes
Yes
6
Yes
Yes
7
Yes
Yes
Yes
8
Yes
9
Yes
Yes
10
Yes
Yes
11
Yes
Yes
Yes
12
Yes
Yes
13
Yes
Yes
Yes
14
Yes
Yes
Yes
15
Yes
Yes
Yes
Yes
Protection for parameters
Item
User
Factory
1*
Hidden
Selectable
2*
Hidden
Selectable
3*
Hidden
Selectable
4*
Hidden
Selectable
5
Selectable
Selectable
6
Selectable
Selectable
7*
Hidden
Selectable
8
Selectable
Selectable
9
Selectable
Selectable
10
Selectable
Selectable
11
Selectable
Selectable
12
Selectable
Selectable
13
Selectable
Selectable
1*
2*
3*
4*
5
6
7*
8
9
10
11
12
13
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9.3 Taking measuring points
Five measuring points must be taken in order to calibrate and
linearize the thermometer. This method fully conforms to
ITS90.
Each measuring point consists of a temperature with 3
decimals. At each point the stable digital readout from the
thermometer is taken. Each temperature value must maintain
a stability of + or - 0.001°C over 60 seconds in order to
successfully calibrate the E20 thermometer. An example of
these 5 points is found the table 1
The colon "Temp" gives the temperature with an accuracy of
± 0.001°C over one minute.
The colon "Reading" gives the readout on the E20
thermometer. This reading also must be stable over 60
seconds + or - one digit.
9.4 Process the calibration data
The data of "Table 1" can now be used to calculate the ITS90
coefficients to linearize the E20 thermometer. The coefficients
will linearize the E20 thermometer to within ±0.01°C linearity
and accuracy.
In the TTT program, select the tab "coefficienten". Data from
"Table 1" now can be used to fill Reference (Y) and Meting
(X).
Use the button to calculate the
coefficients A, B, C, D, E.
Select each coefficient with your mouse and copy it
(Copy or [CTRL-C]).
Go to Tab Variables , select the coefficient and
replace the coefficient (paste or [CTRL-V]).
Repeat this for all coefficients
Temp*
Reading
-42,106
224342
0,004
268904
39,980
310723
79,991
352037
119,979
392821
141,989
415050
Tabel 1
* +/- 0,001 stable over
60 seconds. Absolute
accuracy of 0.006°C
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After copying each coefficient the value is verified. If for some
reason the value is not copied correctly into the thermometer,
the value is indicated in bold. This means there is a difference
between the EEPROM value in the thermometer and the
value in the Tamson Thermometer Toolbox.
Close the communication using the close button, re-open and
try to send the value(s) again.
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10 Spare parts list
Ordering code
Image
Description
10T6097
Works certificate Range - 5 test points
10T6098
Verification calibration extra test point per point
[-40 .. +145°]
Suitcase for thermometer short
Suitcase for thermometer long
24T0013
5V Adapter*
28T2040
Cable RJ11 to USB-A 1.8 metre
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Range
-40 .. + 20°C
0 .. +80°C
20 .. + 120°C
-40 .. + 140°C
Two decimal
precision ± 0.02°C
probe short*
19T4021
19T4022
19T4023
19T4024
Three decimal
precision ± 0.01°C
probe short*
19T4031
19T4032
19T4033
19T4034
Two decimal
precision ± 0.02°C
probe long*
19T4041
19T4042
19T4043
19T4044
Three decimal
precision ± 0.01°C
probe long*
19T4051
19T4052
19T4053
19T4054
Additional works
verification
calibration per point
10T6098
10T6098
10T6098
10T6098
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11 Dimensions and performance
Dimensions housing
Remark
Length
39
[mm]
Width
22
[mm]
Height
62
[mm]
Weight*
50
[grams]
Power consumption
Adapter
5V / 20mA
Accuracy
Resolution
0.001
[°C]
3 Digit reading
0.010
[°C]
2 Digit reading
Accuracy [stDev]
±0.01
[°C]
3 Digit reading
±0.01
[°C]
2 Digit reading
Linearity [stDev]
±0.01
[°C]
2 and 3 Digit reading
Temperature drift
Per year
0.001
[°C]
Per [°C] ambient
0.0005
[°C]
Working condition (ambient)
Temperature
20..30
[°C]
Humidity
10..90
[%]
relative humidity
Sensor
PT100
diameter 6 mm
length 82 mm
Total
length 347
± 0,8 mm
Total
length 347
± 0,5 mm
diameter 3 mm
length 265 mm
diameter 6 mm
length 82 mm
*Probe Short
**Probe Long
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