Lutron Electronics TM-946 User manual

T1, T2, T3, T4, T1-T2, Type J/K, Pt 100 ohm
4 CHANNELS
THERMOMETE
R
Model : TM-946

TABLE OF CONTENTS
1. FEATURES.................................................................
.
1
2. SPECIFICATIONS........................................................1
3. FRONT PANEL DESCRIPTION......................................
.
5
4. GENERAL MEASURING PROCEDURE............................
.
6
4-1 Type K measurement.......................................... 6
4-2 Type J measurement.............................................7
4-3 Pt 100 ohm measurement.................................... 7
4-4 T1-T2 measurement..............................................8
4-5 Data Hold.............................................................8
4-6 Data Record (Max, Min reading).............................8
4-7 Data Logger..........................................................9
5. ADVANCED MEASURING PROCEDURE..........................11
5-1 Change the data logger sampling time....................11
5-2 Clear the existing saving data from the memory......13
6. SEND THE DATA OUT FROM THE METER.....................14
7. OFFSET ADJUSTMENT................................................ 16
7-1 Type K, Type J offset adjustment...........................16
7-2 Pt 100 ohm offset adjustment................................17
8. AUTO POWER OFF DISABLE........................................18
9. RS232 PC SERIAL INTERFACE.....................................
.
19
10. BATTERY REPLACEMENT...........................................21
11. OPTIONAL ACCESSORIES..........................................21

1. FEATURES
* Type K/J, Pt 100 ohm, measurement with 4 display.
* Show 4 channels display on the LCD at the same time.
* Type K : -199.9 to 1370 .℃
* Type J : -199.9 to 1210 .℃
* Pt 100 ohm : -199.9 to 850.0 .℃
* / , 0.1 degree/1 degree.℃℉
* 4 channels ( T1, T2, T3, T4 ), T1-T2.
* Microcomputer circuit provides intelligent function
and high accuracy.
* Manual and auto data logger, with flexible sampling
time selection, can save max. 16,000 reading data.
* Records Maximum and Minimum readings with recall.
* Data hold function for freezing the desired value.
* Offset adjustment for the Type K and Type J measurement.
* Offset adjustment for the Pt 100 measurement.
* Measuring unit can select to or .℃℉
* DC 1.5V ( UM-4, AAA ) battery x 6 PCs.
* Build in the input socket for DC 9V power adapter.
* RS232 PC serial interface.
* Few panel buttons, easy operation.
* Built-in low battery indicator.
* Heavy duty & compact housing case.
2. SPECIFICATIONS
2-1 General Specifications
Circuit Custom one-chip of microprocessor LSI
circuit.
1

Display LCD size : 52 mm x 38 mm
* Show 4 channels display on the
display at the same time.
Display Unit , .℃℉
Resolution 0.1/1,0.1/1 .℃℃ ℉ ℉
Channels T1, T2, T3, T4, T1-T2.
Sensor type Type K thermocouple probe.
Type J thermocouple probe.
PT 100 ohm probe
* Cooperate with an 0.00385 alpha
coefficient, meet DIN IEC 751.
Sampling Time Manual Push the data logger button
of Data Logger once will save data one time.
* Set the sampling to 0 second.
Auto 1 second to 59 minutes and
59 seconds.
Data Logger Max. 16,000-point Data logger
number Type K, Type J, 4 channels ( T1, T2, T3, T4 )
* Memory occupy 4 data point space.
Pt 100 ohm, 2 channels ( T1,T2 )
* Memory occupy 2 data point space.
Temperature Automatic temp. compensation for the
Compensation cold junction both type K/J thermometer
Linear Linear Compensation for the full range.
Compensation
Offset, Span Available for advanced calibration
Adjustment procedure.
Probe Input Type K, Type J :
Socket 2 pin thermocouple socket.
Pt 100 ohm : Ear phone socket.
2

Over Indication
Show " ".
Data Hold Freeze the display reading.
Memory Recall Maximum & Minimum value.
Sampling Time Approx. 1 second.
of display
Power off Auto shut off saves battery life or
manual off by push button.
Data Output RS 232 PC serial interface.
Operating 0 to 50 .℃
Temperature
Operating Less than 80% R.H.
Humidity
Power Supply DC 1.5 V battery ( UM4, AAA ) x 6 PCs,
or equivalent.
DC 9V adapter input.
* AC/DC power adapter is optional.
Power Current Approx. DC 9 mA.
Weight 310 g/0.68 lb.
Dimension 174 x 68 x 42 mm ( 6.9 x 2.7 x 1.7 inch ).
Accessories Instruction manual....................1 PC
Included
Optional * Type K thermocouple probe.
Accessories TP-01, TP-02A. TP-03, TP-04
* Pt 100 ohm probe, TP-101.
* AC to DC 9V adapter.
* RS232 cable, UPCB-02.
*USBcable,USB-01
* Data Acquisition software, SW-U801
* Data Logger software, SW-DL2005.
* Soft carrying case, CA-05A.
* Hard carrying case, CA-06.
3

2-2 Electrical Specifications (23±5 )℃
Type K, Type J thermocouple
Sensor Reso- Range Accuracy
Type lution
Type K 1 ℃1000 to 1370 ℃± ( 0.5 % + 1 )℃
0.1 ℃-199.9 to 999.9 ℃
1 ℉1000 to 2498 ℉± ( 0.5 % + 1.8 )℉
0.1 ℉-199.9 to 999.9 ℉
Type J 1 ℃1000 to 1210 ℃± ( 0.5 % + 1 )℃
0.1 ℃-199.9 to 999.9 ℃
1 ℉1000 to 2210 ℉± ( 0.5 % + 1.8 )℉
0.1 ℉-199.9 to 999.9 ℉
* Accuracy value is specified for the meter only.
* Type K probe TP-01 TP-02A, TP-03. TP-04 are the
optional accessories.
PT 100 ohm
Resolution Range Accuracy
0.1 ℃-199.9 to 850.0 ℃± ( 0.4 % + 1 )℃
1 ℉1000 to 1562 ℉± ( 0.4 % + 1.8 )℉
0.1 ℉-199.9 to 999.9 ℉
1 ℉-200 to -327 ℉
* Pt 100 ohm probe TP-101 is the optional accessory.
* Above specification tests under the environment RF
Field Strength less than 3 V/M & frequency less than
30 MHz only.
4

3. FRONT PANEL DESCRIPTION
Fig. 1
3-1 Display
3-2 Power button
3-3 Hold/ESC button
3-4 REC/Enter button
3-5 Function button ( button, L button )▲
3-6 / button ( Send, CLR button )℃℉
3-7 T1-T2 button ( button, R button )▼
3-8 Lo
gg
er button ( Sample time, Offset button )
3-9 T1,T2,T3,T4 input socket ( Type K, Type J )
3-10 PT1 input socket ( Pt 100 ohm )
3-11 PT2 input socket ( Pt 100 ohm )
3-12 RS-232 output terminal
3-13 DC 9V adapter socket
3-14 Tripod Fix Nut
3-15 Battery Cover Screws
3-16 Battery compartment/Cover
3-17 Stand 5

`
4. GENERAL MEASURING
PROCEDURE
4-1 Type K measurement
1)Power on the meter by pressing the " Power button "
( 3-2, Fig. 1 ) once ( > 1 sec ).
* After already power on the meter, pressing the
" Power button " once ( > 1 sec ) will turn off
the meter.
2)Meter default measurement function is Type K, the
display will not show any indicator.
* For the Type J measurement, the LCD will show
" J " indicator.
* For the Pt 100 ohm measurement, the LCD will show
" Pt " indicator.
3)Select the temperature unit to , by pressing the℃℉
" / button " ( 3-6, Fig. 1 )℃℉
* The LCD will show " " ( ) unit.℃℉
* The selecting unit will be saved into the memory
permanently. If meter power off and on again,
the original selecting unit will present automatically.
6

4)Insert the Type K probes into the " T1, T2, T3, T4 input
socket " ( 3-9, Fig. 1 ).
The LCD will show the 4 channels ( T1, T2, T3, T4 )
temperature value at the same time.
* If the certain channels do not insert the temperature
probes, the relative channel display will show over
range " - - - - - ".
4-2 Type J measurement
All the measuring procedures are same as the Type K
( section 4-1 ) except to select the function to " Type J "
by pressing the " Function button " ( 3-5, Fig. 1 ) once
until the up LCD display show " J " indicator.
4-3 Pt 100 ohm measurement
All the measuring procedures are same as the Type K
( section 4-1 ) except :
1)Pressing the " Function button " ( 3-5, Fig. 1 )
until the right down LCD display show " Pt "
Pt
2)Insert the Pt 100 ohm probe to
PT1 input socket ( 3-10, Fig. 1 )
PT2 input socket ( 3-11, Fig. 1 )
7

* The Pt 100 ohm measurement only allow
max. two channels ( two probes ) input.
4-4 T1-T2 measurement
If the meter already insert two probes :
Type K, Type J : T1, T2 input socket
Pt 100 ohm : PT1, PT2 input socket
Pressing the " T1-T2 button " ( 3-7, Fig. 1 ), display will
show the difference temperature value between T1, T2
( PT1, PT2 ) as :
T1 ℃℃
T1 26.2 1-2
T2 ℃℃
T2 26.6 -0.4 T1-T2 value
4-5 Data Hold
During the measurement, press the " Hold Button " ( 3-3,
Fig. 1 ) once will hold the measured value & the LCD will
show " D.H. " symbol.
Press the " Hold Button " once again will release the data
hold function.
4-6 Data Record ( Max., Min. reading )
* The data record function records the maximum and
minimum readings. Press the " REC Button " ( 3-4, Fig.
1 ) once to start the Data Record function and there
will be a " REC " symbol on the display.
8

* When the " REC " symbol on the display :
a)Press the " REC Button " ( 3-4, Fig. 1 ) once, the
" REC MAX " symbol along with the maximum value
will appear on the display.
If intend to delete the maximum value, just press
the " Hold button " ( 3-3, Fig. 1 ) once, the display
will show the " REC " symbol only & execute the
memory function continuously.
b)Press the " REC button " ( 3-4, Fig. 1 ) again, the
" REC. MIN. " symbol along with the minimum value
will appear on the display.
If intend to delete the minimum value, just press
the " Hold button " ( 3-3, Fig. 1 ) once, then
the display will show the " REC " symbol only &
execute the memory function continuously.
c)To exit the memory record function, just press the
" REC " button over seconds at least. The display will
revert to the current reading.
4-7 Data Logger
* The data logger function can save 16,000 measuring
data.
* The default sampling time is 2 seconds.
The data logger procedures are as following :
a)Press the " REC Button " ( 3-4, Fig. 1 ) once to
start the Data Record function and there will be a
" REC " symbol on the display.
9

b)Auto Data Logger ( Sampling time should select
to 1 second to 59 minutes and 59 seconds )
Press the " Logger button " ( 3-8, Fig. 1 ) once to start
the Data Logger function. The REC symbol will flash per
2 second and the beeper will sound when save the data
into the memory. Now the Date Logger function is
executed.
Manual Data Logger ( Sampling time should set
to 0 second )
Press the " Logger Button " ( 3-8, Fig. 1 ) once will save
the data one time into the memory, at the same time
the symbol " REC " will flash once and the beeper will
sound.
Memory full
When execute the data logger function, if the upper left
display show " FULL ", it indicate the memory data
already over 16,000 no. and the memory is full.
c)During the Data Logger function is executed, press the
" Logger Button " ( 3-8, Fig. 1 ) once will stop the
data logger function, the " REC " symbol will stop to
flash.
If press the " Logger Button " ( 3-8, Fig. 1 ) once again
will continuous the Data Logger function.
10

Note :
1) If intend to change the data logger sampling time, please
refer section 5-1, page 11.
2) If intend to know the space of balance data numbers into the
memory IC, please refer section 6, page 14.
3) If intend to clear the saving data from the memory please
refer section 5-2, page 13.
5. ADVANCED SETTING
PROCEDURE
Before executing advanced adjustment
procedures, exit the " Hold function " and the
Record " function.
5-1 Change the data logger sampling time
1)Pressing " Sample time button " ( 3-8, Fig. 1 )
continuously at least two seconds then release, the
display will show :
oFS SP-t
11

1)Pressing " R button " ( 3-7, Fig. 1 ) once, the display
will show as example :
SP-t
00 02
minutes seconds
adjustment adjustment ( flash )
* The " seconds digits " will be flashed, use the " ▲
button "( 3-5, Fig. 1 ) " button " ( 3-7, Fig. 1 ) to▼
adjust the desiring seconds value ( 0 to 59 ).
* Pressing " Sampling time button " ( 3-8, Fig. 1 ) once
again, the " minutes digits " will be flashed, use the "
button " ( 3-5, Fig. 1 ) " button " ( 3-7, Fig. 1 )▲▼
to adjust the desiring minutes value.
* Pressing " Enter button " ( 3-4, Fig. 1 ) once, both the
" seconds digits " and " minutes digits " will flashing
4 times then return to normal measuring screen,
the sampling time will save into the memory.
During the display flashing, if pressing the " ESC
button " ( 3-3, Fig. 1 ) will exit the sampling time
setting function, the setting value will not be saved
into the memory.
12

5-2 Clear the existing saving data from the memory
1)Pressing " CLR button " ( 3-6, Fig. 1 ) continuously at
least two seconds then release, the display will show :
SEnd CLr
2)Pressing " R button " ( 3-7, Fig. 1 ) once, the display
will show as example :
the data no. already
508 save into the memory
CLr n ( y )
* Use the " button "( 3-5, Fig. 1 ) " button " ( 3-7,▲▼
Fig. 1 ) to change the right bottom text from " n " to
" y ".
* Pressing " Enter button " ( 3-4, Fig. 1 ) once, the data
no. will show zero value and flashing 4 times then
return to normal measuring screen, the data no.
will be erased from the memory.
During the display flashing, if pressing the " ESC
button " ( 3-3, Fig. 1 ) will exit the memory clear
function.
13

6. SEND THE DATA OUT
1)To send the data out from the meter, should exit the
" Hold function " and the " Record function " at first.
2)Pressing " Send button " ( 3-6, Fig. 1 ) continuously at
least two seconds then release, the display will show :
SEnd CLr
3)Pressing " L button " ( 3-5, Fig. 1 ) once, the display
will show as example :
The data no. that are
272 saved into the memory.
15728 Balance of empty
data no.
4)Pressing " Send button " ( 3-6, Fig. 1 ) once,
the display will show as following screen and send
the data out.
14

Value will increase up
from zero until reach
XX to the existing save
data no.
SEnd
Then LCD will change to
the following screen.
The data no. that are
272 saved into the memory.
15728 Balance of empty
data no.
* During send the data out, if pressing the " Send button "
( 3-6, Fig. 1 ) once will stop the data send out
temporally.
* Pressing " Send button " ( 3-6, Fig. 1 ) once again will
send the data continuously.
* After data send out, pressing the " ESC button " ( 3-3,
Fig. 1 ) will return to normal screen.
5)If intend up load the data to the computer, then
should connect the optional RS232
cable/UPCB-02 or USB cable/USB-01 and
cooperate the Data Logger software ( optional,
Model : SW-DL2005 ).
15

7. OFFSET ADJUSTMENT
7-1 Type K, Type J offset adjustment
1)Set the function to Type K ( Type J ).
2)Insert the probe to the T1 input socket.
3)Pressing " Offset button " ( 3-8, Fig. 1 )
continuously at least two seconds then release,
the display will show :
oFS SP-t
4)Pressing " L button " ( 3-5, Fig. 1 ) once, the display
will show as example
oFS
23.7 23.7 If not insert probe
to T1 input socket
measuring adjust it will show " Err "
value value
* Use the " button "( 3-5, Fig. 1 ) " button " ( 3-7,▲▼
Fig. 1 ) to adjust the desiring value on right bottom
display.
* Pressing " Enter button " ( 3-4, Fig. 1 ) once, both
bottom display will flashing 4 times then return to
normal measuring screen and finish the offset
adjustment procedures.
* The above offset adjustment for Type K ( Type J ) is
valid for T1, T2, T3, T4 at the same time.
16

7-2 Pt 100 ohm offset adjustment
1)Set the function to Pt 100 ohm.
2)Insert the Pt 100 ohm probe to the PT1 ( PT2 ) input socket.
3)Pressing " Offset button " ( 3-8, Fig. 1 )
continuously at least two seconds then release, the
display will show :
oFS SP-t
4)Pressing " L button " ( 3-5, Fig. 1 ) once, the display
will show :
oFS
Pt 1 Pt 2
5)If intend to make the offset adjustment for Pt 1, it should
insert the probe to PT1 input socket. Pressing " L button "
( 3-5, Fig. 1 ) once, the display will show example as
following.
6)If intend to make the offset adjustment for Pt 2, it should
insert the probe to PT2 input socket. Pressing " R button "
( 3-7, Fig. 1 ) once, the display will show example as
following.
oFS
23.7 23.7 If not insert probe
to PT1, PT2 input
measuring adjust socket, it will show
value value " Err "
17

* Use the " button "( 3-5, Fig. 1 ) " button " ( 3-7,▲▼
Fig. 1 ) to adjust the desiring value on right bottom
display.
* Pressing " Enter button " ( 3-4, Fig. 1 ) once, both
bottom display will flashing 4 times then return to
normal measuring screen and finish the offset
adjustment procedure.
* The above offset adjustment for Pt 100 ohm is
valid for PT1, PT2 individually.
8. AUTO POWER OFF DISABLE
The meter is built the " Auto power shut off " to saves
battery life. If any buttons not be pushed within 10
minutes, then the power will be off automatically.
If the user is not intend to execute the " Auto Power off "
function, it should take the following procedures :
During the measurement, push the " Record
Button" ( 3-4, Fig. 1 ) to execute the memory
record function, the auto power function will
disable.
18