AccuMac AM8040 Operating Manual

AM8040 Precision Thermometer

User’s Guide

AM8040 Precision Thermometer User’s Guide

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

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AM8040 Precision Thermometer User’s Guide

Please read the “

Important Notice”

information in the next page before
turning on the power of this instrument!

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AM8040 Precision Thermometer User’s Guide

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

5. Instrument Calibration And Accuracy Adjustments

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AM8040 Precision Thermometer User’s Guide

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.

1.1. 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.

1.2. 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.

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AM8040 Precision Thermometer User’s Guide

 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.

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AM8040 Precision Thermometer User’s Guide

2. Main Specification

2.1. Main Specifications

 Range of temperature measurement：-200ºC ~ 850 ºC
 Instrument resolution：0.001 ºC
 Instrument accuracy：

25Ω standard platinum
temperature sensor

100Ω standard 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 100Ω platinum 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

2.2. Sensor Types

 SPRT or PRT with temperature coefficient α=0.003925

(WGa≥1.11807).

 IPRT with temperature coefficient α=0.00385.

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AM8040 Precision Thermometer User’s Guide

switch on ‘Cal’.

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

Interface /Calibration Switch

Flash Drive USB Interface Measurement

Figure 2: Rear Panel

Warning：Unless calibration
is needed do NOT put the

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AM8040 Precision Thermometer User’s Guide

pair

4. General Operations

AM8040 is a high accuracy digital thermometer working with a four­wire platinum resistance thermometer (PRT) sensor.

The details of AM8040 operations are shown as follows:

4.1. 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.

Figure 3: Rear Panel and Sensor Terminals

pair

Measurement/Calibration Switch

4.2. Instrument connection with AC power

AM8040 must work with power of AC100V~240V.

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AM8040 Precision Thermometer User’s Guide

4.3. 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.

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 25Ω or 100 Ω standard platinum resistance thermometers with
α=0.003925. “IPRT” indicates a 100Ω industrial platinum

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AM8040 Precision Thermometer User’s Guide

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

sensor selections and parameter adjustments. The flash drive

recording start/stop key
drive. The details are in 5 Instrument Calibration and Accuracy
Adjustment, and 6 Selection of Sensors and Adjustment of
Parameters.

and return/right shift key can be used for

REC

can be used for data saving to flash

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AM8040 Precision Thermometer User’s Guide

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.

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AM8040 Precision Thermometer User’s Guide

Instrument calibration procedure: (No special sequence for
100 Ω and 25

Ω

calibrations

)

5.1. 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.

Switch to “CAL” side
before calibrations.

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.

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AM8040 Precision Thermometer User’s Guide

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

100R Rs = OHM

100.0238

Rt = 111.0000 OHM

Menu= Exit <^v>=Adj

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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AM8040 Precision Thermometer User’s Guide

and users can adjust the value by using and key. The
following picture shows the adjusted result.

* 100 Ohm CALIBRATION

100R Rs = OHM

100.0038

Rt = 100.0038 OHM

Menu= Exit <^v>=Adj

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*).

5.2. 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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AM8040 Precision Thermometer User’s Guide

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 25Ω to sensor terminals. A standard
resistor of 25Ω must have a value close the 25Ω; otherwise the
calibration will not be accurate.

5.2.5. Press key to start the 25Ω calibration. the instrument
should display “Waiting…” for a few seconds and then show：

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AM8040 Precision Thermometer User’s Guide

* 25 Ohm CALIBRATION

25R Rs = OHM

25.9977

Rt =25.0000 OHM

Menu= Exit Enter = Yes

The value on the third line is the parameter to be adjusted and this
value must match the standard resistance of the 25Ω resistor. For
example, the above figure shows the current value of 25.9977, but
the standards resistor value is 24.9977. This value can be adjusted

by using or key to move the “_” to the position where the

value will be tuned, and using or key to adjust the value.
After the adjustment, the instrument should display：

* 25 Ohm CALIBRATION

25R Rs = OHM

24.9977

Rt =24.9977 OHM

Menu= Exit Enter = Yes

5.2.6. It is required to wait for 15 to 20 seconds before reading is
stable. The next step is to save the calibrated data to the instrument.

To start the data saving, press the
will blink to indicate the option to save.

5.2.7. To save this calibration results, press and hold the key

and then pressing the key at the same time. This will save the
calibration data to the instrument, and the program will go back to
the main menu (*CALIBRATION MENU*). If users DO NOT want

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MENU

key, and the third line data

AM8040 Precision Thermometer User’s Guide

to save the data, press the

MENU

key and go back to main menu

( *CALIBRATION MENU*).。

Switch setting after calibration

 After the calibration, turn off the AC power ;

 Set the Measurement/Calibration switch at the rear panel to

the left side (away from “CAL”)

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AM8040 Precision Thermometer User’s Guide

6. Selection of Sensors and Adjustment of
Parameters

AM8040 can work with different types of PRT probes/sensors. It allows
users to select probe types and input the parameters of the probes.

The probes compatible with AM8040 are:

25 Ω or 100 Ω standard SPRTs, or
25 Ω or 100 Ω secondary reference PRTs, or
100 Ω IPRTs.

The temperature coefficient of these sensors can either be 0.00385
Ω/Ω/°C or 0.003925 Ω/Ω/°C.

The sensor types working with AM8040 are classified and named as
IPRT and SPRT：

 If the probe is an industrial or precision platinum resistance

thermometer probe with a temperature coefficient of 0.00385
Ω/Ω/°C, AM8040 will categorize the probe as “IPRT”. AM8040
calculates temperature according to CVD (IEC751) method.

 If the probe is a SPRT, or a secondary PRT with temperature

coefficient of 0.003925 Ω/Ω/°C (WGa>=1.11807), AM8040 will
categorize the probe as “SPRT”. AM8040 calculates temperature
according to ITS-90 formula.

Steps to select sensor type and input parameters:

1. Under normal working state after power on, press

MENU

key and

then press key in 3 seconds, AM8040 will go to the parameter
adjustment main menu, and the display will show:

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AM8040 Precision Thermometer User’s Guide

There are three options at this step:

i. Sensor Setting. This is for sensor parameter adjustments.

Users can select sensor type and do parameter adjustment.

ii. U-Drive Setting. Users can select data saving rate to external

flash drive.

iii. Wireless Setting. Users can select wireless communication

settings (optional).

2. Press or key to move the high lighten line with “>” to

“Sensor Setting”. Press key to enter Sensor setting adjustment
program as shown below. The sensor type can be “IPRT” or
“SPRT”. Users can select either one by moving the “>” to the

sensor type, and then press key. Users can exit this selection

screen by pressing

MENU

key. The figure below shows that SPRT

sensor type is selected.

3. Press key is to go to parameter adjustment menu:

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AM8040 Precision Thermometer User’s Guide

4. If the type of sensor is SPRT, the adjustable parameters are Rtp, a,

b, c, a4 and b4. The details of these parameter definitions can be
found from ITS-90.

As an example, calibration agencies provide following parameters
after SPRT is calibrated:

Rtp: probe’s resistance at triple point of water.
a4 and b4：low temperature range parameters.
a, b and c：high temperature range parameters (c can be “0” for
some instances. Please refer to ITS-90 for more information.)

5. If the sensor type is IPRT, the adjustable parameters are R0, A, B

and C.

The details of the parameter definitions can be found from the
industrial platinum resistance thermometer calibration procedure.

As an example, calibration agencies provide following parameters
after IPRT is calibrated:

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AM8040 Precision Thermometer User’s Guide

R0：the sensor’s resistance at 0°C.
A and B: the temperature coefficients when temperature is
higher than 0°C.
C: the temperature coefficient when the temperature is lower
than 0°C.

MENU

6.

， ， ， and key can be used together to adjust

these parameters. The parameters can also be saved into the
instrument. The following example is the procedure of adjusting
and saving Rtp and a4 of a SPRT. The other parameter adjustments
follow the same process.

a. To adjust Rtp，continue the operation of 4, press or

key to move the cursor to “>SET Rtp”, and then press
key to go to Rtp adjustment program.

[SPRT SETTING]

Rtp = OHM

MENU=Exit <^v> = Adj

b. The instrument will display the current Rtp value. The digit

with bottom blinking bar indicates the adjustable position.

Users can use and key to move this position and

use and key to adjust the value.

c. After Rtp is adjusted, press

MENU

key. The display will

remind users to save or not to save the adjusted value by

flashing the adjusted Rtp. Press key to save the value or

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AM8040 Precision Thermometer User’s Guide

press

MENU

key to exit the program without saving and go

back to the parameter adjustment menu.

d. The following is the a4 adjustment procedure. Continue

from 4, press and key to move the cursor to “>SET

a4”, and then press key to go to a4 adjustment program,
as shown below:

The second line displays the current a4 value, and the next
two lines show the adjustment selections. a4 adjustment is
different from Rtp adjustment as the value of a4 can be “0”.

If a4 is “0”, users can move the cursor by using and

key to “SET A4=0” line and press the key to confirm the
selection; if a4 is a value other than “0”, user can move the

cursor to “ADJUST a4” line and then press key to go to
a4 adjustment program.

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AM8040 Precision Thermometer User’s Guide

e. The current a4 value will be displayed. To adjust this value,

press or key to move the underline cursor to the
position where the value will be adjusted and then adjust it

by moving or key.

f. After adjustment, users can choose to save or quit the a4

adjustment by pressing the

MENU

key. The a4 line will be

flashing to remind the user that a change has been made. To

save the changes, press key; if not, press
the program will go back to previous screen.

g. Other parameter adjustments are similar to the above Rtp

and a4 adjustment.

MENU

key and

h. After all the adjustments are made, users can go back to the

main menu by pressing
AM8040 go back to the main screen of measurement.

MENU

key multiple times until

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AM8040 Precision Thermometer User’s Guide

7. Wireless Data Acquisition

Some AM8040 precision thermometers (Model# AM8040-W) are
equipped with wireless module to transmit data wirelessly. Free software
for this feature is included with the AM8040-W. Following components
are need for this feature:

 AM8040 precision thermometer with embedded wireless function.
 A wireless transceiver.
 A USB cable.
 Computer with USB interface and Windows XP (or above) operating

system.

AM8040-W

Wireless
Transceiver

USB cable

PC with USB interface
running Wireless Reader

Figure 5: AM8040-W Wireless Data Acquisition.

Directions for setting up the wireless communication system:

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AM8040 Precision Thermometer User’s Guide

1) The AM8040 precision thermometer must be on and connected to

a probe.

2) The computer and wireless transceiver must be within 50m (indoor)

or 80m (outdoor) distance from AM8040. The computer must be
powered on.

3) Connect the wireless transceiver to the computer with a USB cable.

Place it at a high spot for best performance. The system setup is
shown in Figure 5

4) After connecting the wireless transceiver to the computer, the user

will be required to install the USB drivers. The detailed
instructions for this are shown in the Appendix.

5) After the installation of USB drivers, the user will need to install

the free software on the CD included with the AM8040. Insert the
CD into the computer’s CDROM drive and copy the file named
“CoolDragon_Air_Reader.exe” to the computer.

6) Once the file has finished copying, double click on the icon

“CoolDragon_Air_Reader” to begin installation. The following
screen will display:

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AM8040 Precision Thermometer User’s Guide

7) “The Base Status” and “Remote” should display “Wireless Base

RF OK” and “Wireless Remote OK” to confirm the wireless
connection. The value after “ADDR” shows the wireless address
of AM8040 precision thermometer. The data after “RSSI” is the
wireless signal strength which should be a two-digit number after
clicking on “Start”. The RSSI should be greater than -99dBm.
Otherwise, the wireless signal is too weak and the link is not stable.
To increase the wireless power, users can move the instrument
closer to computer or increase the height of the Wireless
Transceiver. If it is still too weak, the environment is not suitable
for wireless communication.

8) To begin wireless data acquisition, clicking on “Start”. If the

wireless signal is good enough, AM8040 should display “ZB-xx”
where “xx” means the wireless signal strength. At the same time,
CoolDragon_Air_Reader should also show the signal strength.
The following figure is an example.

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AM8040 Precision Thermometer User’s Guide

9) The wireless data acquisition can be halted by clicking on “Stop”,

or clicking on “Exit” to quit the program. The default setting for
sampling period is 1 second. The data acquisition can be restarted
by clicking on “Start” if “Stop” is pressed before.

10) CoolDragon_Air_Reader can also save the captured data to a

file “Air_data.txt”. The data sampling rate can be adjusted. The
minimum sampling period is 1 second. Other data sampling period
can be set by following the instruction.

As shown in the above figure, below “Data Saving” there is “Every
x Sec” where x means the sampling period with unit of second. It
is noted that this sampling period can be adjusted only when the
sampling is stopped or halted. For example, if the sampling period
in the above figure is required to change, the program must be
halted by clicking on “Stop” button first, and then users can change
the sampling period. The sampling period must be integer. The
data sampling can be restarted after the modification.

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AM8040 Precision Thermometer User’s Guide

If the captured data need to be saved, users can start the saving by
clicking on “Start”，and then clicking on “REC” button. The
captured temperature can be saved into “Air_data.txt”, and
“Recording…” can be seen；if users want to stop data saving,
clicking on “END” or “Stop” , the temperature data capturing can

be stopped.

The following is an example with 4 second period.

11) The data format saved in the file of Air_data.txt can be shown

as following data：

Time t(C)
12:10:12 +130.735
12:10:13 +130.735
12:10:14 +130.735
12:10:15 +130.735
12:10:16 +130.735

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AM8040 Precision Thermometer User’s Guide

12:10:17 +130.735
end recording

Time t(C)
12:10:28 +130.735
12:10:32 +130.735
12:10:36 +130.734
end recording

The first column is the sampling time which should be same as the
computer time. The second column lists the temperature, each time
“Stop” is pressed, the data saving will be halted, and “end recording”
will be added to the file. If users want to continue data saving, users
can clicking on “REC”, the new data will be added to the last line of
the previous data. The above example illustrated that the data are
stored two times: the first time is 1 second, the second time the
sampling period is 4 seconds.

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AM8040 Precision Thermometer User’s Guide

8. Using a Flash Drive

（

U disk

）

for Data

Acquisition

The flash drive recording start/stop key
to the USB flash drive.

There is a USB port on the rear panel of the AM8040 which can be used
to store the measured temperature data to a flash drive. Any flash drive
with size lower than 4 gigabytes can be connected to the “UDrive”
connector at the rear panel. The following steps explain how to transfer
data from the AM8040 to a flash drive:

1) Connect a flash drive to the “UDrive” USB interface at the rear

panel of AM8040.

2) After the flash drive is connected when AM8040 is powered on the

REC

can be used for saving data

display screen will show some quick information “Device Detected”
“D:/p” to indicate that the flash drive is detected, and the upper left
corner of the display should display “UDr” to remind users that a
flash drive is connected and can be used for data capturing.

3) If the flash drive is connected before the power is on, AM8040

will show the quick information “Device Detected P2” during
initialization to indicate that the flash drive is detected, and the left
up corner of the display should display “UDr” to remind users that
a flash drive is connected and can be used for data capturing.

4) If users want to save the temperature data measured by AM8040 to

the flash drive, just press the

REC

key on the front panel，the

AM8040 will produce a short beep sound and the LED above the

REC

will be turned on. This is to inform that the temperature data

is being written to the flash drive. The file name that data is saving

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AM8040 Precision Thermometer User’s Guide

to is with the name of MYDATA.txt with sampling period 0.97
second.

5) If users want to stop the data saving, just press

REC

key on the front

panel，AM8040 will produce a short beep sound and the LED

above

REC

key will be off to show the end of data saving.

6) The following list is an example of data saved in MYDATA.txt file

of the flash drive. The fist column is temperature in Celsius t(C);
the second column is time with unit of second. An “end” is written

to the file to show that

REC

key is pressed.

i. t(C) Time

ii. +267.178 0.24

iii. +267.178 1.21

iv. +267.178 2.17

v. +267.178 3.14

vi. +267.178 4.10

vii. end

7) The above operations can be repeated to do multiple time data

saving.

8) The temperature data file MYDATA.txt in the flash drive can be

transferred to a computer. Just unplug the flash drive when it is in
stopped status （the LED above the

REC

key is off）and plug the

flash drive to a computer USB connector. After the flash drive is
detected by the computer OS, users can do the file copy as normal.

The data saving period to flash drive can be adjusted by using the
front panel. The default saving period is around 0.97 second，and
it can be set as multiple times of this value with range of 1~65535.

The detailed instruction is shown as below:

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AM8040 Precision Thermometer User’s Guide

A. When AM8040 is in a normal working state, press

MENU

key and

then press key in 3 seconds, AM8040 will enter the main menu
as below.

B. Press key or key to move the cursor line with ”>” sign to “ >

U-Drive Setting”, then press key to go to “Record Cycle
adjustment” program as shown below. “N” represents the how
often the temperature will be saved in multiple times of 0.97
second. The current value is “1”.

C. If sampling frequency other than “1” is needed, the “Record Cycle”

value can be adjusted as follows: press and hold key and then

press key, a similar display as below will come out.

 It should be noted that this operation is a two key

operation. Don’t release the key before pressing
key.

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AM8040 Precision Thermometer User’s Guide

D. Press key or key to adjust the “N” value which must be

equal or greater than 1

E. After the adjustment, press

MENU

key, the new adjusted value will

blink to indicate whether the user wishes to save this new N value.
For example，the following picture shows the new N value is 9,
which means AM8040 will save a data to file every 9x0.97

seconds. To save this value, do the following two-key operation:
press and hold key and then press key；if users DON’T

want to save, just press

 Note: this operation is a two-key operation ： do not

release key before pressing key. otherwise the
new value can not be saved.

F. After the adjustment, press

MENU

key to exit.

MENU

multiple times until AM8040 goes

back to main screen of measurement.

Note: The parameter adjustments should only be performed while the
flash drive is not in the data saving process.

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AM8040 Precision Thermometer User’s Guide

9. Using the USB Interface for Data Acquisition

AM8040 precision thermometer is designed with a USB interface for
data acquisition and saving temperature data to a file.

The following section describes the process of setting up a USB
temperature data acquisition:

1) Connect a USB cable to the USB (USB B type) interface at the

rear panel of AM8040 to a computer.

USB Cable

AM8040

Cool Dragon

Digital Thermometer

PC with USB interface

Running CoolDragon USB

Reader

Figure6: AM8040 USB Temperature Data Acquisition System

2) The first time that an AM8040 is connected to a computer, the

computer will require users to install the USB drivers. The
detailed instruction is illustrated in the Error! Reference
source not found.After the installation of these USB drivers, no
further drivers will need to be installed.

a. Copy “CoolDragon_USB_reader.exe” in the attached CD

to the computer desktop.

b. Double click on “CoolDragon_USB_reader” to start the

software，the computer should show：

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AM8040 Precision Thermometer User’s Guide

c. The measurement can be started by clicking on “Start”，

or can be stopped by clicking on “Stop”, or quit by
clicking on “Exit”. The default sampling period is 1
second.

The free software “CoolDragon_USB_reader” also has data saving
function to save the captured temperature to a file named
“U_data.txt”. Users can also adjust the sampling period for their
requirements. The shortest sampling period is 1 second. The
instruction is as follows.

Find the “Every x Sec” section of the “Data Saving” section at the
right side of the software’s GUI. The unit of the sampling period is
second. If sampling period other than 1 second is required, users can
adjust the value in the box. It is noted that the adjustment must be
done when the measurement is “Stop” state as shown in the above
figure, i.e., the adjustment must before “Start” or after “Stop” is
pressed.

If users want to save the captured temperature data, click on “Start”
first, and temperature data should be received with a blinking tick

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AM8040 Precision Thermometer User’s Guide

showing the data capturing, then users can click on “REC” to start
the data saving. The data will be saved to “U_data.txt” file，and
“Recording…” should be shown ； if users want to stop the data
saving, just click on “END” or “Stop” , and the temperature data

saving will be stopped.

The following figure shows that the data is saved to file with a
sampling period of 3 seconds.

The saved data format in “U_data.txt” is like:

Time t(C)
22:43:07 +0.009
22:43:10 +0.008
22:43:13 +0.008
22:43:16 +0.008
22:43:19 +0.009
22:43:22 +0.008
end recording

The first column is time which is identical to the computer time,
and the second column shows the temperature.

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AM8040 Precision Thermometer User’s Guide

10. Appendix: Installation of USB Driver

Important Update: if your PC is running Windows7 (or higher
version) operation system, you can skip USB driver installation
process. Otherwise, please follow the instructions below.

AM8040 precision thermometer and wireless transceiver are designed
with USB interface. The installation of USB driver is required the first
time these instruments are connected to a computer.

The USB drivers for AM8040 precision thermometer and wireless
transceiver are the same. The installation can be done by following the
steps below:

1) When AM8040 precision thermometer and wireless transceiver

are first connected to a computer， OS will pop up an auto
detection information “Found New Hardware” .

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AM8040 Precision Thermometer User’s Guide

2) Put the attached CD into the CDROM drive (assume the

CDROM drive is E:)，and then select “No, not this time” and
click on “Next”,

3) Select “Install from a list or specific location (Advanced)” and

then click “Next”,

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AM8040 Precision Thermometer User’s Guide

4) Search E drive by using “Browse” as above figure，then click

“Next”,

5) Select “Continue Anyway”, the computer will search for another

file ”FTD2XX.sys”,

6) Use “Browse” to search for and select FTD2XX.sys，then
click on “OK”. After the installation, the computer should show：

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AM8040 Precision Thermometer User’s Guide

7) Select “Finish” to end the installation.

8) The computer should show “You new hardware is ready to use”
to indicate the USB drivers are correctly installed.

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AM8040 Precision Thermometer User’s Guide

11. Limited Warranty & Limitation of Liability

The material contained in this document is provided “as is,” and is
subject to being changed, without notice, in future editions. AccuMac
shall not be liable for errors or for incidental or consequential damages
in connection with the furnishing, use, or performance of this document
or of any information contained herein. Should AccuMac and the user
have a separate written agreement with warranty terms covering the
material in this document that conflict with these terms, the warranty
terms in the separate agreement shall control.

Each product from AccuMac Corporation is warranted to be free from
defects in material and workmanship under normal use and service. The
warranty period is 1 year for Precision Thermometers. The warranty
period begins on the date of the shipment. Parts, product repairs, and
services are warranted for 90 days. The warranty extends only to the
original buyer or end-user customer of an AccuMac authorized reseller.
The warranty will not extended to products that have been misused,
altered, neglected, or damaged by accident or abnormal conditions of
operation or handling.

To obtain warranty service, contact AccuMac Corporation at:

3150 N Arizona Ave Ste 103
Chandler, AZ 85225
USA
Tel: [phone]
Email: [e-mail]

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