M-3549/1299(HH303) 1/23/00 7:55 PM Page 2
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User’s Guide
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HH303
M3549/1299
Type K J Thermometer
Type K J Thermometer
C O N T E N T S
ꢀ ꢀ ꢀ ꢀ ꢁꢂꢁꢃꢄꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢀ ꢅꢆꢇꢄ
I. Introductionꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢁꢁꢁ
ꢀ
ꢀ
ꢂ
II. Specificationsꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢂ
III. Symbol Definition and Button
Locationꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢁꢁꢀꢀꢀꢁꢀꢁ
ꢀ
ꢃ
IV. Operation Instructionsꢀꢀꢀꢀꢀꢀꢁꢀꢀꢀꢀꢁ
ꢅꢁꢆꢇ ꢈꢉꢊꢋꢌꢍꢎꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢁꢁꢁꢀꢀꢀꢁ
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Type K J Thermometer
I. Introduction:
This instrument is a digital thermometer for use with any K-type
and J-type thermocouple as temperature sensor.
Temperature indication follows National Bureau of Standards and
IEC584 temperature/voltage table for K-type and J-type
thermocouples.
II. Specifications:
Numerical Display:
4 digital liquid crystal display
Measurement Range:
K-Type: -200°C ~ 1370°C
-328°F ~ 2498°F
-328°F ~ 1400°F
J-Type:
-200°C ~ 760°C
Resolution:
K-Type: -200°C~ 800°C 0.1°C; 800°C ~1370°C 1°C
-328°F~ 1000°F 0.1°F; else 1°F
J-Type:
-200°C~ 600°C 0.1°C; 600°C ~760°C 1°C
-328°F~ 1000°F 0.1°F; else 1°F
Maximum Voltage at Thermocouple Input:
60V DC, or 24Vrms AC
Environmental:
ο Operating Temperature and Humidity:
0°C ~50°C (32°F ~ 122°F) ; 0 ~ 80% RH
ο Storage Temperature and Humidity:
-10°C to 60°C (14°F ~ 140°F); 0 ~ 80% RH
ο Altitude up to 2000 meters.
Accuracy: at ( 23 ± 5°C )
Range
Accuracy
K-Type -200°C ~ 1370°C
J-Type -2000°C ~ 760°C
K-Type -328°F ~ 2498°F
J-Type -328°F ~ 1400°F
±(0.1% reading + 0.7°C)
±(0.1% reading + 0.7°C)
±(0.1% reading + 1.4°F)
±(0.1% reading + 1.4°F)
For T1-T2 Measurement, the accuracy is ±( 0.2% T1-T2 reading + 1.7°C)
or ±( 0.2% T1-T2 reading + 3.4°F)
ꢁ
Type K J Thermometer
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 accuracy spec.
0.01% of reading + 0.03°C ( 0.01% of reading + 0.06°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: 184ꢀ 64ꢀ 30mm
Weight: 210g Approx.(7.4oz)
Accessory:
K Type Bead Probe, Battery, Carrying Case, Instruction Menu.
Option:
Soft Ware Package ( Program, RS232 Connection Cable) , AC
Adapter.
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: 3.5ꢀ 1.35mm
ꢂ
Type K J Thermometer
III. Symbol Definition and Button
Location:
Main Display
Second Display
-
:This indicates that the minus temperature is sensed.
ꢈꢀ ꢉ :Centigrade and Fahrenheit indication.
ꢊꢀꢋ :Thermocouple Type Indication
ꢌꢍꢃꢎ :This indicates that the display data is being hold.
ꢏꢆꢐ :The Maximum value is now being displayed
ꢏꢂꢑ :The Minimum value is now being displayed
ꢆꢒꢇ :The Average value is now being displayed.
ꢁꢓꢄꢃ
:The reading is now under Relative Mode.
:The Battery is not sufficient for proper operation.
ꢃ
Type K J Thermometer
ꢇ
ꢅ ꢆ
ꢃ ꢄ ꢂ
ꢀ ꢁ ꢂ
ꢇ
ꢅ ꢆ
ꢃ ꢄ ꢂ
ꢀ ꢁ ꢂ
ꢇ
ꢀ ꢁ
ꢀ ꢂ
ꢀꢁ
ꢀꢂ
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ꢁ
ꢄ
ꢅ
ꢂ
ꢆ
ꢃ
ꢈꢉꢅ
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ꢈꢉꢊꢊꢌ
ꢈꢉꢊꢊꢋ
ꢅꢃꢃ
ꢄꢅꢆ
ꢐ
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ꢅꢂꢍꢆ
ꢐ
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ꢄ
Type K J Thermometer
IV. Operation Instructions :
4.1 Power-Up
I
Press the ꢂ key to turn the thermometer On or OFF.
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.
4.4 Selecting the Thermocouple Type
By default, when the meter is powered on, it is K-Type, One may
press and hold “°C/°F” button and then power on the meter, then
it will change to J-Type.
4.5 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”,
and “ °C/°F ” button are disabled.
4.6 T1,T2,T1-T2 Display Control:
One may select T1,T2 or T1-T2 to show on the main display by
pressing
button. When T1 or T2 is select to show on the
main display, the other temperature will be shown on the second
display. When one select T1-T2 to show on the main display,
T1 and T2 will be shown on the second display alternately.
4.7 Relative Operation for Main Display:
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.
ꢅ
Type K J Thermometer
4.8 MAX/MIN/AVG Operation for Main Display:
When one press the button the meter will enter
the MAX/MIN mode. Under this mode the maximum value,
minimum value and average value of latest 4 data 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
again, then the NIN symbol is on the display and
also the minimum reading.
Press
again, the AVG symbol is on the display and also
the average reading.
Press
again, MAX, MIN and AVG will blink together. This
means that all these data is updated in the memory and the
reading is the present temperature.
One may press
these options.
to circulate the display mode among
When the meter is under
operation, “ꢁ REL” and
“ °C/°F ” are disabled.
To exit the MAX/MIN mode, one may press and hold
for two seconds.
4.9 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 or RS232 communication.Key combination at power on
or RS232 communication 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.
4.10 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.
ꢆ
Type K J Thermometer
4.11 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.
ꢂꢁ
ꢀꢁ
ꢃꢄꢅ
RS232 command
Function
Remarks
Send 4 bytes
K(ASC 4BH)
H(ASC 48H)
T(ASC 54H)
M(ASC 4DH)
N(ASC 4EH)
R(ASC 52H)
C(ASC 43H)
A(ASC 41H)
Ask for model No.
Hold button
TIMER button
AVG/MAX/MIN button
Exit AVG/MAX/MIN mode
REL button
°C/°F button
Inquire all encoded data
Send encoded 8 byte
ꢃCommand K:
Return 4 bytes. For example, when sends command "K" to meter,
it will return "3","0","3", ASCII(13) .
(0x13) represent T1,- 199.9°C, The total byte number should be
7+1+7+1+5+chr(13)=22Bytes
ꢃCommand T:
Equivalent to one pushing on the HOLD button.
ꢃCommand M:
Equivalent to one pushing on the HOLD AVG/MAX/
MIN button and no message is returned.
ꢇ
Type K J Thermometer
ꢃCommand R:
Equivalent to one pushing on the REL button and no message is
returned.
ꢃCommand C:
Equivalent to one pushing on the ꢄ/ꢅ button and no message
is returned.
ꢃCommand A:
1nd BYTE:
The first byte is the start byte , it value is 2.
2nd BYTE:
bit7
bit6
bit5
bit4
bit3
K/J
bit2 bit1 bit0
MAX/AVG/MIN
C/F
Low Bat
Hold
REL
bit 2 bit 1 bit0
0
0
0
1
1
0
0
1
0
1
0
1
0
0
1
→ normal mode
→ MAXIMUN mode
→ MINIMUN mode
→ AVG mode
→ calculate MAX/MIN/AVG in back-ground
and lcd "MAX""AVG""MIN" will flash.
bit3: 1→0→K TYPE 1→J TYPE
bit4: 1→REL
bit5: 1- HOLD 0→not HOLD
bit6: 1→LOW BATTERY 0→BATTERY NORMAL
bit7: 1→ꢄ 0→ꢅ
3nd BYTE:
bit7
bit6
bit5
bit4
bit3
OL
bit2
bit1
bit0
OL
point minus
point minus
bit0:1→main window value is OL, 0→not OL
bit1:1→main window value is minus, 0→main window value is plus.
th
th
th
bit2:1→4 byte and 5 byte represent #### 0→4th byte and 5 byte
ꢈ
Type K J Thermometer
represent ###.#
Type K J Thermometer
bit3:1→sub window value is OL , 0→not OL
bit4:1→sub window value is minus, 0→sub window value is plus.
th
th
th
bit5:1→6 byte and 7 byte represent #### 0→6th byte and 7 byte
represent ###.#
bit7 bit6:
00→Main window is T1-T2,sub window is T1
01→Main window is T1-T2, sub window is T2
10→Main window is T1, sub window is T2
11→Main window is T2, sub window is T1
th
4
BYTE: first two BCD code of main window value.
BYTE: last two BCD code of main window value
BYTE: first two BCD code of sub window value.
BYTE: last two BCD code of sub window value.
th
5
th
6
th
7
th
8
BYTE: The last byte is the end byte , it value is 3, first and last
byte are used to check frame error.
ꢀ
Date
JUN./06/2002
1 of 1
Calibration Procedure
Page
Model No.
HH302 & HH303
23 ± 5 ℃
Environmental:
K,J Thermometer (HH302) calibrate procedure
1. Hold REL+AVG+TIMER then press power , release all button ,press HOLD +C/F in 5
seconds, LCD will show “CAL 1”.
2. Input 52.418 mV via copper wire , press REL button when LCD display a stable
value(about 14,000 count). Then LCD will display “CAL 2”
3. Input 33.290 mV via copper wire, press REL button when LCD display a stable
value(about 18,000 count), Then LCD will display “CAL 3”
4. Input 0 C via thermocouple wire, press REL button when LCD display a stable
value(less then 1000 count),
Now , press REL button again to finish calibrating .
K,J Thermometer (HH303) calibrate procedure
1. Hold REL+AVG+ T1-T2 then press power , release all button ,press HOLD +C/F in 5
seconds, LCD will show “CAL 1”.
2. Input 52.418 mV via copper wire , press REL button when LCD display a stable
value(about 14,000 count). Then LCD will display “CAL 2”
3. Input 33.290 mV via copper wire, press REL button when LCD display a stable
value(about 18,000 count), Then LCD will display “CAL 3”
4. Input 0 C via thermocouple wire, press REL button when LCD display a stable
value(less then 1000 count),
Now , press REL button again to finish calibrating .
Omega
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