Center 305 User manual

305
Datalogger
RS-232
REC
POWER-UP OPTIONS
RANGE -200° C
REL HOLD
SETUP
CLOCK
REC
INTV
°
C/° F
-328° F
1370° C
2498° F

CONTENTS
TITLE PAGE
I. Introduction…………………………………………………………………………….…..1
II. Specifications…………………………………………………………………………… 1
III. Symbol Definition and Button Location……………………………….2
IV. Operation Instructions…………………………………………….………………3
4.1 Power-Up…………………………………………………………………………………....3
4.2 Connection the Thermocouples………………………………………………………...3
4.3 Selecting the Temperature Scale………………………………………………………. 3
4.4 Data-Hold Operation……………………………………………………………………… 3
4.5 DataLogger………………………………………………………………………………… 3
4.6 Clock Setup ……………………………………………………………………………….. 3
4.7 Recording Interval Setup……..…………………………………………………………. 4
4.8 Relative Operation……………………………………………………………………….. 4
4.9 MAX/MIN Operation………………………………………………………………………. 4
4.10 Auto Power Off……………………………………………………………………………4
4.11 Low Battery Condition ………………………………………………………………….4
4.12 Calibration Point………………………………………………………………………… 4
4.13 Digital Output…………………………………………………………………………….. 5
V. Setup ThermoLog (Thermo DataLogger)—RS232 interface
software……………………………………………………………………………………… 7

Data Logger Instruction Manual
1
I. Introduction:
This instrument is a digital thermometer for use with any K-type thermocouple as temperature
sensor. Temperature indication follows National Bureau of Standards and IEC584
temperature/voltage table for K-type thermocouples. Its internal memory can keep up to 16241
records.(note1.) It uses RS232 interface to perform bi-directional communication with PC.
II. Specifications:
Numerical Display: 4 digital Liquid Crystal Display
Measurement Range: -200°C ~ 1370°C -328°F ~ 2498°F
Resolution: -200°C~ 200°C 0.1°C; 200°C ~1370°C 1°C
-200°F~ 200°F 0.1°F; else 1°F
Input Portection at Thermocouple Input: 60V DC, or 24Vrms AC
Environmental:
ROperating Temperature and Humidity: 0°C ~50°C (32°F ~ 122°F) ; 0 ~ 80% RH
RStorage Temperature and Humidity: -10°C to 60°C (14°F ~ 140°F); 0 ~ 80% RH
RAltitude up to 2000 meters.
Accuracy: at ( 23 ± 5°C )
Range Accuracy
-200°C ~ 200°C ±(0.2% reading + 1°C)
200°C ~ 400°C ±(0.5% reading + 1°C)
400°C~1370°C ±(0.2% reading + 1°C)
-328°F ~ -200°F ±(0.5% reading + 2°F)
-200°F ~ 200°F ±(0.2% reading + 2°F)
200°F ~ 2498°F ±(0.3% reading + 2°F)
Note:
The basic accuracy Specification does not include the error of the probe. Please refer to the
probe accuracy specification for additional details.
Sample Rate: 2.5 times per second
Dimension: 1846430mm
Weight: 210g Approx.
Accessory: K Type Bead Probe, Battery, Carrying Case, Instruction Menu, Soft Ware Package
(Program, RS232 Connection Cable)
Power requirement: 9 Volt Battery, NEDA 1604 or JIS 006P or IEC6F22
Battery Life: Approx. 100hrs with alkaline battery
AC Adapter: 9VDC ±15% 100mA
Plug Diameter: 3.5mm1.35mm
Option : AC Adapter
note1:
Every time you press "REC" button to start recording data and press "REC" button again to stop
recording, there will be a data set in memory, you can store as many data sets as you want until memory
is full.
Temperature Coefficient:
For ambient temperatures from 0°C ~ 18°C and 28°C
~ 50°C, for each °C ambient below 18°C or above
28°C add the following tolerance into the accurac
y
spec.
0.01% of reading + 0.03°C
( 0.01% of reading + 0.06°F )

Data Logger Instruction Manual
2
III. Symbol Definition and Button Location:
: This indicates that the minus temperature is sensed.
℃℉ : Centigrade and Fahrenheit indication.
△REL : The reading is now under Relative Mode.
K : Thermocouple Type Indication
MAX : The Maximum value is now being displayed
MIN : The Minimum value is now being displayed
: This indicates auto power off is enabled.
: This indicates that the display data is being held.
m-d : month and day
h:m : hour and minute
m:s : minute and second
y : year
: The Battery is not sufficient for proper operation.
REC: This indicates that the tester is recording. If it blinks, it indicates the memory is full.
Button Location:
{K type temperature sensor input
connector
|LCD display
}ON/OFF button
~Relative readout button
Record button
MAX MIN function control button
HOLD button
°C, °F control button
Offset calibration screw
Digital output connector
11 AC power adapter connector
12 Tripod connector
13 Battery cabinet cover
SETUP
CLOCK INTV
POWER-UP OPTIONS
REC
328
200
RANGE:
F 2498
C1370
F
C
HOLD
REC C
REL
F
2
3
47
6
9
OUTPUT
DC9V
OPEN
CAL
9V BATTERY
PLEASE READ
NEDA 1604 6F22 006P
MANUAL FOR SAFETY
60V
24V
MAX
8
5
1

Data Logger Instruction Manual
3
IV. Operation Instructions:
4.1 Power-Up
Press the power button to turn the thermometer ON or OFF.
When the user power it on, the LCD will show how much memory
space is available to use.
For example: It indicates that there are 16,000 records memory space available.
4.2 Connection the Thermocouples
For measurement, plug the thermocouple into the input connectors.
4.3 Selecting the Temperature Scale
When the meter was first power on, the default scale setting is set at Celsius (°C) scale. The user
may change it to Fahrenheit (°F) by pressing “ °C/°F ” button and vice versa to Celsius. Next time
you power on, the scale setting will be the same as which when you powerd off last time.
4.4 Data-Hold Operation
The user may hold the present reading and keep it on the display by pressing the “HOLD” button.
When the held data is no longer needed, one may release the data-hold operation by pressing
“HOLD” button again.
When the meter is under Data Hold operation, the “REL”, "max min" and “ °C/°F ”button are
disabled. (when you press "REL” ,“ °C/°F ” and "max min" button in HOLD mode, there will be
two continuous beeps)
To exit the MAX/MIN mode, one may press and hold "MAX MIN" button for two seconds.
4.5 DataLogger:
When one press the "REC" button, the meter will start recording,
press the "REC" button again will stop recording, If you want to
clear the memory, power off the meter, then press and hold “REC”
button and then press power button and hold at least 2 seconds,
then release all buttons ,then LCD will show "CLR" to clear the
memory.
4.6 Clock Setup :
1: press and hold “MAX MIN” button and then power on the meter:
2: press “REL”(clock):
3: press "REC" or "°C/°F" to increase or decrease number,
press “REL”(clock) to adjust next item. The adjusting order is
yearmonthdayhourminute, then press “REL” (clock)
to finish adjusting. If you want abort during a setup process, press
power button to cancel.

Data Logger Instruction Manual
4
4.7 Recording Interval Setup :
1: press and hold “MAX MIN” button and then power on the meter:
2: press “HOLD"(INTV)
3: press "REC" or "°C/°F" to increase or decrease number,
press “HOLD" (INTV) to adjust next item, then press “HOLD” (INTV)
to finish. If you want abort during a setup process, press power
button to cancel.
4.8 Relative Operation:
When one press the “REL” button, the meter will memorize the present reading and the difference
between the new reading and the memorized data will be shown on the display. Press the “REL”
button again to exit the Relative operation. When the meter is under relative operation, “ °C/°F ”
button is disabled. (when you press “ °C/°F ” button in relative mode, there will be two continuous
beep)
4.9 MAX/MIN Operation:
When one press the "MAX MIN" button the meter will enter the MAX/MIN mode. Under this mode
the maximum value, minimum value is kept in the memory simultaneously and updated with every
new data.
When the MAX symbol is display, the Maximum is shown on the display.
Press "MAX MIN" again, then the MIN symbol is on the display and also the minimum reading.
Press "MAX MIN" again, MAX, and MIN will blink together. This means that all these data is
updated in the memory and the reading is the present temperature.
One may press "MAX MIN" to circulate the display mode among these options.
When the meter is under "MAX MIN" operation, “REL” and “ °C/°F ” button are disabled.(when
you press "REL” and “ °C/°F ” button in "MAX MIN" mode, there will be two continuous beep)
To exit the MAX/MIN mode, one may press and hold "MAX MIN" for two seconds.
4.10 Auto Power Off:
By default, when the meter is powered on, it is under auto power off mode. The meter will power
itself off after 30 minutes if no key operation and no RS232 communication and no recording.
combination at power on can disable auto power off.
One may press and hold “HOLD” button and then power on the meter and there will be two
successive beeps to indicate that auto power off is disabled and the will not show up.
4.11 Low Battery Condition
When the battery voltage is under proper operation requirement, the symbol will show on the
LCD and the battery need to be replaced with new one.
4.12 Calibration Point:
input Adjust VR tolerance
0 °C VR1 ± 0.1 °C
190 °C VR2 ± 0.1 °C
1000 °C VR3 ± 1 °C
1900 °F VR4 ± 1 °F
P. S
Normally, performing offset Calibration with thermal
stabled ice water through VR1 will give a very good
calibration result.

Data Logger Instruction Manual
5
TX RX GND
4.13 Digital Output:
The Digital Output is a 9600bps N 81 serial interface.
The RX is a 5V normal high input port.
The TX is a 5V normal high output port.
The command of Digital Output is list below:
RS232 command Function Remarks
K(ASC 4BH) Ask for model No. Return 4 bytes
A(ASC 41H) Inquire all encoded data Return encoded 10 byte
H(ASC 48H) Hold button
M(ASC 4DH) MAX/MIN button
N(ASC 4EH) Exit MAX/MIN mode
R(ASC 52H) REL button
C(ASC 43H) C/F button
U(ASC 55H) Dump all memory of thermometer return 32768 bytes
P(ASC 50H) Load recorded data
Command K:
Return 4 bytes. For example, when sends command "K" to meter, it will return "3","0","5",
ASCII(13) .
Command U:
Return 32768 bytes .
Command P:
Instead of returning all 32768 bytes, it only return recorded data .
Command H:
Equivalent to one pushing on the HOLD button and no message is returned.
Command M:
Equivalent to one pushing on the MAX/MIN button and no message is returned.
Command N:
Equivalent to one pushing and hold the MAX/MIN button for two seconds to exit MAX/MIN mode.
Command R:
Equivalent to one pushing on the REL button and no message is returned.
Command C:
Equivalent to one pushing on the °C/°F button and no message is returned.
Command A:
1nd BYTE:
The first byte is the start byte , it value is 2.
2nd BYTE:
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
C/F Low Bat Hold REL MAX/MIN REC
bit 0: 1recording mode, 0not recording
bit 2 bit 1
0 0 normal mode
0 1 MAXIMUN mode
1 0 MINIMUN mode
1 1 calculate MAX/MIN in background mode .

Data Logger Instruction Manual
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bit3: no use.
bit4: 1REL
bit5: 1HOLD, 0not HOLD
bit6: 1LOW BATTERY , 0BATTERY NORMAL
bit7: 1°C 0°F
3th BYTE:
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
Auto Power Off Memory full resolution sign OL
bit0: 1main window value is OL, 0not OL
bit1: 1main window value is minus, 0main window value is plus.
bit2: 14th byte and 5th byte represent #### , 04th byte and 5th byte represent ###.#
bit6: 1Memory is full. 0Memory is not full.
bit7: 1Auto power off enabled. 0Auto power off disabled.
4th BYTE:
first two BCD code of main window value.
5th BYTE:
last two BCD code of main window value
6th BYTE:
BCD code of month.
7th BYTE:
BCD code of day.
8th BYTE:
BCD code of hours.
9th BYTE:
BCD code of minute.
10th BYTE:
end byte, it value is 3, 1nd and 10th are used to check frame error.
Appendix: Thermo couple probe specification
Model Range Tolerances Description
TP-K01
Bead probe
-50to 200
-58to 392
2.2or 0.75
(3.6or 0.75)
with Teflon tape insulation Maximum
insulating temperature : 260

TP-K01:
probe for general condition measurements, especially for
complex and hard to reach places.

Data Logger Instruction Manual
7
V. Setup ThermoLog (Thermo DataLogger) — RS232 interface software:
 The ThermoLog package contains:
1.Two 3.5” diskettes
2.Custom designed RS232 cable for THERMOLOG.
 System Required:
Windows 95 or Windows 98 or Windows NT 4.0 above.
 Minimum Hardware Required:
486-100 MHz PC compatible , 16 MB RAM ;
At least 5 MB hard disk space available to install THERMOLOG program. Recommended
display resolution is 800X600.
 Install ThermoLog:
1.We recommend close all other application before installing ThermoLog.
2.Insert setup diskette 1 to floppy disk drive.
3.Choose the Start button on the Taskbar and select Run.
4.Type A:\SETUP and choose OK, then it will copy ThermoLogg.exe ( executable file ) and help
file to your hard disk ( default is c:\program files\ThermoLog ).
For other operation instruction, please refer to the on-line help while executing ThermoLog.
Main Menu
Link Test :
Open Link Test window to search for thermometer connected to PC. When you start the
THERMOLINK, this window will display first and search for thermometer. The result will be
shown in the text box.
click to exit ThermoLog
click to show on-line help
click to show the present list data
click to load the recorded data form
thermometer
it shows whether thermometer is
connected or not
click to show the
presentgraph window
click to show graph ,
panel and tabular
window.
click to show panel
window
click to test if there is any
thermometer connected to PC

Data Logger Instruction Manual
8
Control Panel:
By opening the Control Panel Window, the user can control thermometer via the button in this
window.
DataLogger:
By opening the DataLogger Window, the user can load the recorded data from themometer.
Tabular:
By opening the Tabular window, the present data from the thermometer will be listed in a
scrolling table. These data can be stored as a file or the table can be copy to other software
such as EXCEL for further analysis.
Graph:
Open Real-Time Graph window to show the present data in graph.
Exit:
Terminates THERMOLOG program.
Tray Icon:
When THERMOLOG is running , there will be an icon displayed on the Windows Tray area
(see figure below), you can click this icon then it will show a pop-up menu.
Tray Icon

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