AccuMac AM8040 User manual

Rev. 202206V1
AM8040 Precision Thermometer
User’s Guide
Please download the latest version at www.accumac.com

AM8040 Precision Thermometer User’s Guide
Rev. 202206V1 1/40
Table of Contents
Important Notice ---- Warning ......................................................................... 2
1Introduction............................................................................................... 3
1.1 Main Application .................................................................................... 3
1.2 Main Features.......................................................................................... 3
2Specifications............................................................................................. 5
2.1 Specifications.......................................................................................... 5
2.2 Probe Types............................................................................................. 5
3User Interface............................................................................................ 6
4General Operations .................................................................................. 7
4.1 Connecting the probe/sensor................................................................... 7
4.2 Instrument connection with AC power................................................... 7
4.3 Instrument front panel display and touchpad.......................................... 8
5Instrument Calibration and Accuracy Adjustments .......................... 10
5.1 100 Ω calibration................................................................................... 11
5.2 25 Ω calibration..................................................................................... 14
6Selection of Sensors and Adjustment of Parameters .......................... 17
7Wireless Data Acquisition...................................................................... 23
8Using a Flash Drive (U disk) for Data Acquisition.............................. 29
9Using the USB Interface for Data Acquisition..................................... 33
10 Appendix: Installation of USB Driver.................................................. 36
11 Limited Warranty & Limitation of Liability....................................... 40
Please read the “Important Notice”information on
the next page before turning on this instrument!

AM8040 Precision Thermometer User’s Guide
Rev. 202206V1 2/40
Important Notice ---- Warning
Check the position of the “Measurement/Calibration
Switch” on the rear panel. Please refer to Figure 2. The
switch must be at the 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 agencies with proper standard
resistors should perform the calibrations of this
device. Please refer to 5. Instrument Calibration and
Accuracy Adjustments

AM8040 Precision Thermometer User’s Guide
Rev. 202206V1 3/40
1Introduction
The 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
the ITS-90 standards or the 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 with the simple ‘plug-and-record’ function. 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.
Works with Standard Platinum Resistance Thermometers
(SPRTs), Secondary Platinum Resistance Thermometers
(Secondary PRTs) and Precision Industrial Platinum
Resistance Thermometers (IPRTs).
Wireless/wired/flash real time temperature measurement and
acquisition.
1.2 Main Features
High accuracy: up to ±0.008ºC at 0ºC.
High resolution: 0.001ºC
Concurrent platinum sensor temperature measurement and data
capturing.

AM8040 Precision Thermometer User’s Guide
Rev. 202206V1 4/40
Concurrent display of sensor’s temperature in Celsius ºC,
Fahrenheit ºF, and resistance Ω.
2.7” OLED display.
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 a flash drive.

AM8040 Precision Thermometer User’s Guide
Rev. 202206V1 5/40
2Specifications
2.1 Specifications
Model
8040
Temperature Range
-260°C to 850°C
Accuracy (meter only)
±0.01°C at -200°C
±0.008°C at 0°C
±0.009°C at 232°C
±0.01°C at 420°C
±0.015°C at 660°C
Resolution
0.001°C (0.0001Ω) over full range
Probe
Nominal Rtpw: 25 Ωor 100 ΩRTD, PRT or SPRT
Characterizations
ITS-90 coefficients, Callendar-Van Dusen coefficients, IEC-751 (DIN 385)
Sample Interval
1 second
Display
2.7 inch OLED
Display Units
°C, °F, Ω
Excitation Current
1 mA, reversing
Operation Range
15°C to 35°C
Thermometer Input
Connectors
Spade plug, banana plug or bare wire
Power Requirements
100-240V
Dimensions
180mm (W) x 65mm (H) x 200mm (D)
Weight
0.3 kg (0.7 lbs)
2.2 Probe 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
Rev. 202206V1 6/40
3User Interface
Front Panel:
Flash Drive Wireless USB Sensor Main Menu Flash Drive
Status Status Status Type Key Recording
Start/Stop Key
Main Display Left Key Parameter Return
Adjust Key /Right Key
Figure 1: Front Panel
Rear Panel:
AC Power Inlet & Switch Sensor terminals
Flash Drive USB Measurement/Calibration Switch
Interface Interface
Figure 2: Rear Panel
Warning：Unless calibration
is needed do NOT put the
switch on ‘Cal’.

AM8040 Precision Thermometer User’s Guide
Rev. 202206V1 7/40
4General 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:
4.1 Connecting the probe/sensor
The 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 the “Measurement” position.
Measurement/Calibration Switch
Figure 3: Rear Panel and Sensor Terminals
4.2 Instrument connection with AC power
AM8040 must be used with power of AC100V~240V.
Pair
ors
Pair
ors

AM8040 Precision Thermometer User’s Guide
Rev. 202206V1 8/40
4.3 Instrument front panel display and touchpad
After power is on and a sensor is connected, AM8040 shows some
initialization information, and then displays 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 in the 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.
Line 1 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 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 Line 2 shows the measured temperature of the sensor.
The “IPRT” at the end of Line 2 tells the type of sensor. AM8040
supports two types of sensors. “SPRT” indicates a 25Ω or 100Ω
standard platinum resistance thermometer with α=0.003925. “IPRT”

AM8040 Precision Thermometer User’s Guide
Rev. 202206V1 9/40
indicates a 100Ω industrial platinum resistance thermometer with
α=0.00385. The “C” is displayed at end of Line 2, it means the
temperature is measured in Celsius degrees.
Line 3 shows the sensor resistance. Line 4 shows the temperature in
Fahrenheit degrees.
AM8040 has three display pages of the measured data and these
pages can be scrolled to show different information. The above
example is page 1. The third page shows the resistance of the sensor.
The second page is the combination of page 1 and page 3. Users can
scroll up and down through these three pages by pressing the or
keys.
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 a flash
drive. The details are in 5. Instrument Calibration and Accuracy
Adjustments and 6. Selection of Sensors and Adjustment of
Parameters.