Czaki EMT-200 User manual

MICROPROCESSOR CONTROLLED TEMPERATURE METER
EMT-200
OPERATING MANUAL
ul. 19 Kwietnia 58
05-090 Raszyn Rybie
tel. [phone]
fax. [phone]
www.czaki.pl
[email protected]

Contents
1. Meter features ..............................................................3
2. Display and keyboard...................................................4
2.1. Description of display functions ..............................5
2.2. Using keyboard.......................................................5
3. Programming mode......................................................6
4. Menu AL_1 or AL_2..................................................... 8
4.1. Setting the alarm mode.......................................... 8
4.2. Setting alarm thresholds.........................................9
5. MEMO menu................................................................ 9
5.1. Cyclic readout period..............................................9
5.2. Printing results......................................................10
5.3 Recording results...................................................10
6. SYST menu................................................................ 11
6.1. Protection.............................................................11
6.2. Reset.....................................................................11
7. TEPR menu................................................................12
7.1 Sensor type............................................................12
7.2. Resolution of measurements................................12
7.3. Characteristic offset..............................................13
8. R232 menu.................................................................13
8.1. Meter address.......................................................14
8.2. Transmission rate................................................. 14
8.3. Parity check.......................................................... 15
9. Programming the meter through the RS232 port....... 15
9.1. Data format...........................................................15
9.2. Parameter symbols...............................................16
10. Making electrical connections.................................. 17
10.1. Power supply...................................................... 17
10.2. Sensor................................................................ 18
10.3. Alarm circuits...................................................... 18
10.4. Serial port........................................................... 19
11. Remarks concerning operational use of the meter...19
12. Technical data.......................................................... 20

1. Meter features
The EMT 200 is an universal microprocessor controlled temperature
meter. Its main features are:
!input adjusted to most commonly used types of thermocouples and
thermistors
!two alarms controlling independent relays, programmable in five
modes
!bi-directional RS232 serial port, isolated, making possible remote
readout and storage of the most important parameters
!memory of 300 measurements
!meter parameters and configuration set through a keyboard or
serial port
!two four digit LED displays and three additional status lights
3

2. Display and keyboard
Double display and three key keyboard are placed on the front panel
of the meter. The panel is presented in the picture below:
4
1
2
3 4 5 8
7 6
1 Main display
2 Auxiliary display
3 „ALARM 1” LED
4 „ALARM 2” LED
5 „TRANSMISSION” LED
6 „p” key
7 „u” key
8 „tu” key

2.1.Description of display functions
Switching on the meter results in displaying the „LOAD” message on
the main display. It means starting the meter.
In the basic mode the display presents temperature in
degrees Centigrade. The unit of measurements is shown on the
auxiliary display..
In the programming mode the main display shows
consecutive positions of menu or parameter names, and the
auxiliary display presents their respective values..
If the LED „ALARM 1” or / and „ALARM 2” comes on it
means that the measured temperature has entered the
programmed alarm range.
While modifying (meter) parameters the value indicated in
the active field of the auxiliary display is also changed. The
active field is distinguished by blinking of selected position.
If the main display shows the „ERR” message it means that
the processing range has been exceeded, a sensor has been
incorrectly connected, or the sensor previously programmed
differs from the sensor actually connected.
2.2.Using keyboard
The meter is equipped with the three key membrane keyboard..
The key „p” is used for changing the value of the active
(blinking) digit. It is also intended for entering the parameter
programming mode and for leaving this mode.
The key „u” makes possible changing the menu position
and changing the active digit.
The key „tu” is intended for confirming the selected menu
position, or for confirming the (selected) value.
5

3.Programming mode
The programming mode is entered by pressing „p” for approx. 3
seconds.
It results in the message „AL_1” appearing on the main display.
Repetitive depressing of „u” scrolls consecutive menu positions.
Finding the appropriate menu position is confirmed by pressing
„tu”.
Depressing „p” causes entering the higher menu level. The same at
the highest menu level results in leaving the programming mode and
entering the temperature measurement mode.
If the user does not change any parameters the programming mode
will go off automatically after approx. 90 seconds.
At the parameter change procedure the key „p” changes the value
under the cursor, and the key „u” shifts the cursor position (if possible).
6
Changing parametr value:
Using „u” activate the digit to be changed on the auxiliary display ;
Using „p” set the new value;
Repeat this procedure till the required value is set completely;
Introduced changes confirm by „tu”. It causes memorizing the
parameter value.
ATTENTION: If the entered value exceeds premissible limits then on
the auxiliary display the „ERR” message appears for a while, after that
the previous value (before modification) is continously displayed.

600,1200,2400
4800,9600
R232
Factory
settings
Admissible values
Displayed
symbol
Parameter description
item 2
0, 1, 2, 3, 4, 5
TAL
TAL
P1
P1
P2
P2
RSCT
TPRI
TMEM
PROT
RESE
SNSR
TPOI
TOFF
ADR
BAUD
PARI
0
0
0
0
0
0
0
1
K
2
4
10
10
100
0.0
2400
NONE
1...240
AL_2
MEMO
SYST
-9.9...+9,9
1...99
NONE, ODD, EVEN
Pt,Ni,T,J,K,R,S,B,N
0, 1, 2
0, 1, 2
0, 1, 2
0, 1
0, 1
-100...+1800
-100...+1800
-100...+1800
AL_1
-100...+1800
TEPR
0, 1, 2, 3, 4, 5
alarm mode 1
item 1
alarm mode 2
item 1
item 2
readout period
results readout
results recording
protection
reset
sensor type
resolution
offset
address
rate
parity
7
ATTENTION: Parameters in the shaded fields are accessible if the
„p” key has been depressed at the moment of switching
on the meter.

4.Menu AL_1 or AL_2
Programming alarms consists in setting their work modes and values
of threshold temperatures.
Enter the programming mode by depressing „p” for approx. three
seconds.
Using „u” select from the menu position „AL_1” or „AL_2”, confirm
by „tu”.
4.1. Setting the alarm mode
In the alarm programming mode using „u” select „TAL ” position.
The auxiliary display will show the current alarm mode. To change
the mode depress „tu” (the digit on the auxiliary display starts
blinking).
Using „p” set the required alarm mode.
!Mode 0alarm is off,
!Mode 1alarm comes on when the current temperature exceeds the
first alarm threshold,
!Mode 2alarm comes on when the current temperature drops below
the first alarm threshold,
!Mode 3alarm comes on when the current temperature exceeds the
first alarm threshold, and at the same time is lower than the second
alarm threshold.
!Mode 4alarm comes on when the current temperature drops below
the first alarm threshold or exceeds the second alarm threshold.
!Mode 5alarm comes on when the current temperature exceeds the
second alarm threshold, and comes off when temperature drops below
the first alarm threshold (hysteresis). If a power outage appears in this
mode the meter memorises states of relays and the last temperature,
This makes possible correct alarm operation after re-powering.
Alarm modes are presented in a graphical form on page 22.
8

After making changes confirm them by depressing „tu” („TAL ”
message will start blinking again).
Depressing „u” we can reach the next position of menu.
Depressing „p” we leave „TAL ”, pressing again „ p” we go out of
the programming mode and enter the temperature measurement mode.
4.2. Setting alarm thresholds
Using „u” select position „P1” or „P2” in the alarm programming mode.
The auxiliary display will show the current value of the alarm
threshold temperature. To change its value depress „ tu”, (the first
digit of the auxiliary display will start blinking).
Using „p” set the required value, then using „u” go to the next digit.
A parameter can assume values from 100 to +1800.
After making changes confirm them by „tu” ( „P1” or „P2” will start
blinking again).
Depressing „p” we come out of „P1” or „P2”, depressing again „p”
we leave the programming mode and enter the temperature
measurement mode.
ATTENTION: Take care to set the value of the first threshold
(„P1”) below the value of the second threshold („P2”).
Otherwise alarms may function improperly.
5. MEMO menu
The meter is equipped with the RS232 serial port. It enables easy
connection between the meter and the computer for bi-directional data
transmission, or between the meter and the printer for creating a simple
temperature recorder.
The serial port makes possible:
- Non-recurrent or periodical readout of measured temperature
- Alarm parameter readout,
- Alarm parameters recording,
- Adjustment of data transmission rate
9

The keyboard makes possible triggering the cyclic temperature
readout through the port (this option is used for the meter - printer
arrangement), and setting the meter address.
The parameter programming mode is entered by selecting the
„MEMO” position from menu, and confirming it by „tu”.
5.1. Cyclic readout period
Determining the period between the consecutive recordings of data,
or consecutive data transmissions to the RS232 port.
In the programming mode „MEMO” select the position „RSCT” by „
u”. The auxiliary display indicates the current value in seconds. To
change it depress „tu” (the digit on the auxiliary display will start
blinking). Using „p” set the required value.
The parameter can assume values from 1to 240.
Changes should be confirmed by „tu” (the message „RSCT” would
start blinking again).
Depressing „u” we can reach the next position of menu.
Depressing „p” we come out of „RSCT”, depressing „p” again we
leave the programming mode and enter temperature measurement
mode.
5.2. Printing results
Determining whether measurement results should be sent to the
RS232 port.
Using „u”select the position „TPRI” in the programming mode
„MEMO”.
The auxiliary display indicates the current value of the parameter. To
change it depress „tu” (the digit on the auxiliary display will start
blinking).
Using „p” set the required value.
The parameter can assume the following values:
!0results are not sent to the RS232 port,
!1sends measured temperature with frequency determined by
„RSCT”(see item. 5.1).
!2 sends measurement data from the memory (this operation does
not erase the results). 10