AccuMac AM8040 User manual

AM8040 Precision Thermometer
User’s Guide

AM8040 Precision Thermometer User’s Guide
Page 1
Table of Contents
Important Notice ---- Warning ..........................................................3
1. Introduction ..................................................................................4
1.1. Main Application.......................................................................4
1.2. Main Features............................................................................4
2. Main Specification........................................................................6
2.1. Main Specifications...................................................................6
2.2. Sensor Types..............................................................................6
3. User Interface ...............................................................................7
4. General Operations.......................................................................8
4.1. Connecting the probe/sensor.....................................................8
4.2. Instrument connection with AC power .....................................8
4.3. Instrument front panel display and touchpad............................9
5. Instrument Calibration and Accuracy Adjustments...................11
5.1. 100 Ω calibration .....................................................................12
5.2. 25 Ω calibration .......................................................................14
6. Selection of Sensors and Adjustment of Parameters .................18
7. Wireless Data Acquisition..........................................................24
8. Using a Flash Drive（U disk）for Data Acquisition................30
9. Using the USB Interface for Data Acquisition ..........................34
10. Appendix: Installation of USB Driver ....................................37
11. Limited Warranty & Limitation of Liability...........................41

AM8040 Precision Thermometer User’s Guide
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Please read the “ Important Notice”
information in the next page before
turning on the power of this instrument!

AM8040 Precision Thermometer User’s Guide
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Important Notice ---- Warning
Check the position of “Measurement/Calibration Switch”on
the rear panel. Please refer to Figure 2. The switch must be
at measurement (left) position. Loss of calibration data will
occur if the switch is at the calibration (CAL) position when
the instrument is used in measurement application.
The instrument is calibrated before shipment. Only qualified
calibration professionals with proper standard resistors
should perform the calibrations of this device. Please refer to
4. General Operations
AM8040 is a high accuracy digital thermometer working with a four-
wire platinum resistance thermometer (PRT) sensor.
The details of AM8040 operations are shown as follows:
2.1. Connecting the probe/sensor
Four-wire sensor should be connected to the “Sensor” terminals
at the rear panel. Figure 3 shows how the four wire sensor
should be connected.
It should be noted that the “Measurement/Calibration” switch
should be at “Measurement” position.

AM8040 Precision Thermometer User’s Guide
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Measurement/Calibration Switch
Figure 3: Rear Panel and Sensor Terminals
2.2. Instrument connection with AC power
AM8040 must work with power of AC100V~240V.
2.3. Instrument front panel display and touchpad
After power is on and a sensor is connected, AM8040 shows
some initialization information, and then display information
including the instrument’s interface status, measured
temperature in Celsius degree, the sensor resistance and
temperature in Fahrenheit degree. These are shown in 4 lines as
following figure.
Udr ZB-xx USB
+130.734
t= IPRT
C
Rt= 150.1074
ohm
t= +267.321
F
Line 1
Line 2
Line 3
Line 4
There is a status sign which blinks at the upper left corner of the
LCD display functioning as a status indicator. The status sign
blinks when the device is powered on.

AM8040 Precision Thermometer User’s Guide
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Line1 is the instrument’s interface status, including USB flash
drive, wireless communication status and USB to computer
interface status. If “Udr”is displayed, it means that a flash flash
drive is connected to the Host USB interface; if “ZB-xx”is
displayed, where “xx” are numbers, it means Zigbee wireless
data capturing is working; if the display shows“USB”on the
top line, it informs the user that AM8040 is connected to a
computer’s USB interface.
The “t=” at Line2 shows the measured temperature of the sensor.
The“IPRT” at the end of the Line2 tells the type of sensor of
sensor. AM8040 supports two types of sensors. “SPRT”
indicates a 25Ωor 100 Ωstandard platinum resistance
thermometers with α=0.003925. “IPRT” indicates a 100Ω
industrial platinum resistance thermometer with α=0.00385. The
“C” is displayed at end of Line2, it means the temperature is
measured is in Celsius degree.
Line3 shows the sensor resistance. Line 4 shows the temperature
in Fahrenheit degree.
AM8040 has three display pages of the measured data and these
pages can be scrolled to show different information. The above
sample is page1. The third page shows the resistance of the
sensor. The second page is the combination of page1 and page3.
User can scroll up and down these three pages by pressing or
key.
The menu key
MENU
and return/right shift key can be used for
sensor selections and parameter adjustments. The flash drive
recording start/stop key
REC
can be used for data saving to flash

AM8040 Precision Thermometer User’s Guide
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drive. The details are in 5 Instrument Calibration and Accuracy
Adjustment, and 6 Selection of Sensors and Adjustment of
Parameters.

AM8040 Precision Thermometer User’s Guide
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Instrument Calibration And Accuracy Adjustments

AM8040 Precision Thermometer User’s Guide
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1.Introduction
AM8040 precision thermometer is a desktop temperature
measurement and calibration device. It can work together with various
types of platinum resistance thermometer (PRT) sensors. The
measured temperature is calculated by the embedded microcontroller
following ITS-90 standard or CVD conversion method. This precision
thermometer has strong data acquisition capability. Users can acquire
and record data using an USB cable connecting to a PC, or using a
Flash drive by simply ‘plug-and-record’. Alternatively, it can work
with an optional wireless module to acquire and record data remotely
through wireless. With these flexible peripherals, temperature data can
be captured and saved in real time easily for various applications.
2.4. Main Application
Temperature calibrations or precision temperature
measurements.
Work with Standard Platinum Resistance Thermometers
(SPRTs), secondary platinum resistance thermometers
(Secondary PRTs) and precision industrial platinum resistance
thermometers (IPRTs).
Wireless/wire/flash real time temperature measurement and
acquisition.
2.5. Main Features
High accuracy, 0.008ºC at 0ºC.
High resolution，0.001ºC
Concurrent platinum sensor temperature measurement and data
capturing.
Concurrent display of sensor’s temperature in Celsius ºC, ºF,
resistance Ω.
2.7” large size OLED display.

AM8040 Precision Thermometer User’s Guide
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Touchpad for function control.
Flexible sensor parameter adjustment and setting.
USB interface to computer for real time temperature capturing
and data saving.
Wireless real time temperature data capturing with optional
external wireless module.
Real time temperature data capturing and saving to flash drive.

AM8040 Precision Thermometer User’s Guide
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2.Main Specification
3.1. Main Specifications
Range of temperature measurement：-200ºC ~ 850 ºC
Instrument resolution：0.001 ºC
Instrument accuracy：
25Ωstandard platinum
temperature sensor
100Ωstandard or industrial
platinum temperature sensor
±0.015 ºC @ -196 ºC
±0.010 ºC @ -200 ºC
±0.010 ºC @ 0 ºC
±0.008 ºC @ 0 ºC
±0.015 ºC @ 232 ºC
±0.009 ºC @ 232 ºC
±0.020 ºC @ 420 ºC
±0.01 ºC @ 420 ºC
±0.025 ºC @ 660 ºC
±0.015 ºC @ 660 ºC
±0.025 ºC @ 850 ºC
Instrument short term stability：
o±0.001 ºC（with 100Ωplatinum sensor）
o±0.003 ºC（with 25Ω platinum sensor）
Instrument working environment：15ºC ~ 35 ºC
Power supply：AC 100V ~ 240V
Power consumption：< 15 W
Dimension ：180 mm x 65 mm x 200 mm
Weight ：300g
3.2. Sensor Types
SPRT or PRT with temperature coefficient α=0.003925
(WGa≥1.11807).
IPRT with temperature coefficient α=0.00385.

AM8040 Precision Thermometer User’s Guide
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3. User Interface
Front Panel：
Flash Drive Wireless USB status Sensor Type Main Menu Flash Drive
Status Status Key Recording
Start/Stop
Key
Main Display Left Key Parameter Return
Key Adjust /Right
Key Key
Figure 1: Front Panel
Rear Panel:
AC Power Inlet & Switch Sensor terminals
Flash Drive USB Interface Measurement
Interface /Calibration Switch
Figure 2: Rear Panel
Warning：Unless calibration
is needed do NOT put the
switch on ‘Cal’.

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4.General Operations
AM8040 is a high accuracy digital thermometer working with a four-
wire platinum resistance thermometer (PRT) sensor.
The details of AM8040 operations are shown as follows:
5.1. Connecting the probe/sensor
Four-wire sensor should be connected to the “Sensor” terminals at
the rear panel. Figure 3 shows how the four wire sensor should be
connected.
It should be noted that the “Measurement/Calibration” switch
should be at “Measurement” position.
Measurement/Calibration Switch
Figure 3: Rear Panel and Sensor Terminals
5.2. Instrument connection with AC power
AM8040 must work with power of AC100V~240V.
pair
ors
pair
ors

AM8040 Precision Thermometer User’s Guide
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5.3. Instrument front panel display and touchpad
After power is on and a sensor is connected, AM8040 shows some
initialization information, and then display information including
the instrument’s interface status, measured temperature in Celsius
degree, the sensor resistance and temperature in Fahrenheit degree.
These are shown in 4 lines as following figure.
Udr ZB-xx USB
+130.734
t= IPRT
C
Rt= 150.1074
ohm
t= +267.321
F
Line 1
Line 2
Line 3
Line 4
There is a status sign which blinks at the upper left corner of the
LCD display functioning as a status indicator. The status sign
blinks when the device is powered on.
Line1 is the instrument’s interface status, including USB flash
drive, wireless communication status and USB to computer
interface status. If “Udr”is displayed, it means that a flash flash
drive is connected to the Host USB interface; if “ZB-xx”is
displayed, where “xx” are numbers, it means Zigbee wireless data
capturing is working; if the display shows“USB”on the top line,
it informs the user that AM8040 is connected to a computer’s USB
interface.
The “t=” at Line2 shows the measured temperature of the sensor.
The“IPRT” at the end of the Line2 tells the type of sensor of
sensor. AM8040 supports two types of sensors. “SPRT” indicates
a 25Ωor 100 Ωstandard platinum resistance thermometers with
α=0.003925. “IPRT” indicates a 100Ωindustrial platinum

AM8040 Precision Thermometer User’s Guide
Page 14
resistance thermometer with α=0.00385. The “C” is displayed at
end of Line2, it means the temperature is measured is in Celsius
degree.
Line3 shows the sensor resistance. Line 4 shows the temperature in
Fahrenheit degree.
AM8040 has three display pages of the measured data and these
pages can be scrolled to show different information. The above
sample is page1. The third page shows the resistance of the sensor.
The second page is the combination of page1 and page3. User can
scroll up and down these three pages by pressing or key.
The menu key
MENU
and return/right shift key can be used for
sensor selections and parameter adjustments. The flash drive
recording start/stop key
REC
can be used for data saving to flash
drive. The details are in 5 Instrument Calibration and Accuracy
Adjustment, and 6 Selection of Sensors and Adjustment of
Parameters.

AM8040 Precision Thermometer User’s Guide
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5.Instrument Calibration and Accuracy
Adjustments
AM8040 is designed for accurate temperature measurements by
measuring the sensor resistance and converting it to temperature.
Consequently, the resistance measurement is very critical and the
instrument must be calibrated correctly. Every AM8040 is calibrated
before shipment.
Users can calibrate AM8040 using standard resistors with calibrated
values. One year calibration interval is recommended.
Warning: It is required to set correct R0 or Rtpw value of the sensor
before calibrations. To calibrate AM8040 in the range from 10 Ω to 50
Ω, R0 or Rtpw needs to be set to 25 Ω. To calibrate AM8040 in the
range from 50 Ω to 375 Ω, R0 or Rtpw needs to be set to 100 Ω.
The calibration should be done in an environment with room
temperature of 22±2°C.

AM8040 Precision Thermometer User’s Guide
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Instrument calibration procedure: (No special sequence for
100 Ωand 25 Ωcalibrations)
6.1. 100 Ω calibration
5.1.1. Turn off the power, put the measurement/calibration switch
to the “CAL”side (right side). Please see Figure 4 for details.
Figure 4: Calibration Configuration at Rear Panel.
5.1.2. Turn on power, after initialization ，AM8040 shows the
calibration main menu. There are two calibrations selections: 100
Ohm CALIBRATION and 25 Ohm CALIBRATION. The following
is an illustration of the 100 Ohm CALIBRATION.
* CALIBRATION MENU *
> 100 Ohm CALIBRATION
25 Ohm CALIBRATION
Enter = Yes
-------------------------------------------
5.1.3. Use or key on the key pad to select the calibration. A
“>” sign is displayed in front of the selected line. For example, the
above figure shows that 100 Ohm CALIBRATION is selected.
Switch to “CAL” side
before calibrations.

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Pressing the key will start the calibration program, and the
following display will appear：
* 100 Ohm CALIBRATION
Connect a 100 Ohm
Standard Resistor
and Press Enter
Menu= Exit Enter = Yes
-------------------------------------------
5.1.4. The instrument will show “Connect a 100 Ohm Standard
Resistor and Press Enter”to indicate that a 100Ω must be connected
first. Users can exit the calibration by pressing
MENU
key to go back to
main menu ( *CALIBRATION MENU*).
5.1.5. After the sensor is correctly connected, press key to start
the calibration. The instrument will display “Waiting…” for a few
seconds and should display some values as following：
* 100 Ohm CALIBRATION
100.0238
Rt = 111.0000 OHM
Menu= Exit <^v>=Adj
100R Rs = OHM
5.1.6. To calibration the instrument, users must adjust the value at
the third line (100.0238 as shown above) to match the standard
resistor’s resistance. For example, if the resistance of the standard
resistor is 100.0038ohm, users can move the underline cursor to the
position where the value will be adjusted by using and key,

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and users can adjust the value by using and key. The
following picture shows the adjusted result.
* 100 Ohm CALIBRATION
100.0038
Rt = 100.0038 OHM
Menu= Exit <^v>=Adj
100R Rs = OHM
5.1.7. It is required to wait for 15 to 20 seconds before the data are
stable. The next step is to save the calibrated data to the instrument.
To save the data, press the
MENU
key, and the third line data will blink
to inform the option to save.
5.1.8. To save this calibration value, press and hold the key and
then press the key at the same time. This operation will store the
calibration data to the instrument, and the program will go back to
the main menu (*CALIBRATION MENU*). If users DO NOT want
to save the data, press the
MENU
key and the display page will be back
to main menu ( *CALIBRATION MENU*).
6.2. 25 Ω calibration
5.2.1. The process of 25 Ω calibrations is similar to that of 100 Ω
Calibration. Frist, turning off the power of the instrument and ensure
the measurement/calibration switch at the rear panel to the “CAL”
side (right side), as shown in Figure 4.

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5.2.2. Choose 25 Ohm CALIBRATION under main menu
( *CALIBRATION MENU*) by pressing or key to move the
“>” cursor to the “25 Ohm CALIBRATION” line：
* CALIBRATION MENU
100 Ohm CALIBRATION
> 25 Ohm CALIBRATION
Enter = Yes
-------------------------------------------
5.2.3. Press key to start the program of 25 Ohm
CALIBRATION. The instrument will show：
* 25 Ohm CALIBRATION
Connect a 25 Ohm
Standard Resistor
and Press Enter
Menu= Exit Enter = Yes
-------------------------------------------
5.2.4. Follow the “Connect a 25 Ohm Standard Resistor and Press
Enter”instruction to connect a 25Ωto sensor terminals. A standard
resistor of 25Ωmust have a value close the 25Ω; otherwise the
calibration will not be accurate.
5.2.5. Press key to start the 25Ωcalibration. the instrument
should display “Waiting…” for a few seconds and then show：