Twite Instruments TD-196 Manuel utilisateur
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TWITE INSTRUMENTS THERMOSTAT MODEL TD-196 OPERATING MANUAL
TWITE INSTRUMENTS PTY. LTD. ®
A.C.N. 050 199 758
No. 3 STANLEY St. MOOROOPNA VICTORIA AUSTRALIA 3629.
PO. Box 176 SHEPPARTON VICTORIA AUSTRALIA 3630.
Telephone (058) 253-161 FAX (058) 252-042
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TWITE INSTRUMENTS THERMOSTAT MODEL TD-196 OPERATING MANUAL
© Copyright 1994 - 1999 Twite Instruments Pty. Ltd. All rights reserved.
No part of this publication may be reproduced, translated into another language,
stored in a retrieval system, or transmitted, in any form or by any means, electronic,
mechanical, photocopying, or otherwise without the prior written consent of
TWITE INSTRUMENTS Pty. Ltd.
Every precaution has been taken in the preparation of this publication.
TWITE INSTRUMENTS assumes no responsibility for errors or omissions. Neither
is any liability assumed for damages resulting from the use of the information
contained herein.
Specifications of the THERMOSTAT Model TD-196 are subject to change without
notice.
Twite Instruments Pty. Ltd. or any of its Partners, Principals or Employees cannot be
held responsible or liable for any loss of product, produce or buildings where any of
Twite Instruments Pty. Ltd. Products are found to be responsible for the loss of any
product, produce or buildings.
IBM ® is a trade mark of International Business Machines.
EPSON ® is a trade mark of EPSON.
WINDOWS & WINDOWS 3 ® is a trade mark of Microsoft.
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TWITE INSTRUMENTS THERMOSTAT MODEL TD-196 OPERATING MANUAL
CONTENTS
INSTALLATION
MOUNTING 6
POWER & SOLENOID CONNECTION 6
SENSOR INPUT CONNECTIONS 7
SENSOR POSITIONING 8
PRINTER CONNECTION (RS485) 8
ALARM OUTPUTS 9
DISPLAY CONTRAST ADJUST 33
DISPLAY FUNCTIONS
DISPLAY LED 10
SETTING LED 10
D/M/S LED 11
REFRIG LED 12
SUCTION LED 12
FANS LED 12
ALARM LED 12
KEYBOARD FUNCTIONS
"SET" KEY 12
"ENT" KEY 13
" s" "DIS" (up arrow) KEY 13
" t" "DIS" (down arrow) KEY 13
PASSWORD
USING PASSWORD 14
CHANGE PASSWORD 14
PASSWORD UNKNOWN 14
SELECTING CHANNELS 15
FUNCTION NUMBERS 16
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TWITE INSTRUMENTS THERMOSTAT MODEL TD-196 OPERATING MANUAL
CONTENTS
SET POINT PARAMETERS
TEMPERATURE 17
DIFFERENTIAL 18
SET POINT USAGE TIMES 18
HIGH ALARM TEMPERATURE SET POINTS 19
LOW ALARM TEMPERATURE SET POINTS 19
HIGH ALARM DELAY SET POINT 20
LOW ALARM DELAY SET POINT 20
SET DEFROSTS 21-22
DEFROST AUTO OFF 23
DEFROST MANUAL ON OFF 23
CONTROL ON OFF 24
FANS CONTINUOUS AUTOMATIC 24
HIGH ALARM ACTIVE (OVERRIDE) 25
LOW ALARM ACTIVE (OVERRIDE) 25
DIFFERENTIAL TYPE 26
POWER ON DELAY 27
UNIT NUMBER 27
COOLING OR HEATING 28
SET REAL TIME CLOCK 28
CALIBRATE REAL TIME CLOCK 29
PRINT 29-30
DATA LOGGING 31
PASSWORD ON OFF 32
CHANGE PASSWORD 32
PUMP DOWN SET POINT 33
DISPLAY INTENSITY 33
DAILY SET POINTS 34
LINE FEED YES NO 35
CHANNELS CONNECTED 35
CHANNELS TO SCAN 36
SCAN TIME 36
SCAN YES NO 36
CONTROL CHANNEL 37
RESET MAXIMUM MINIMUM 37
BAUD RATE SET 38
LONG TERM OR PULL DOWN MODE SET 38
CALIBRATION VALUES 62
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TWITE INSTRUMENTS THERMOSTAT MODEL TD-196 OPERATING MANUAL
CONTENTS
PRINTER COMMUNICATIONS 40
CALIBRATING AND DEFAULT VALUES :-
CALIBRATION BUTTON ACCESS HOLE 42
CALIBRATE VALUES CHECK & ALTER 43-44
CALIBRATION VALUES UPDATE 44
TEST DISPLAYS 44
MEMORY (RAM) TEST 44
RESET DATA LOGGING 45
RESET PASSWORD 45
SET PARAMETERS TO A DEFAULT VALUE 45
KICK START REAL TIME CLOCK 45
CALIBRATE SENSORS 446-47
START UP DEFAULTS VALUES 47
SPECIFICATIONS 48-50
ERROR MESSAGES 51-52
REMOTE DISPLAY MODULE
MOUNTING 53
POWER SUPPLY 53
RS485 INPUT 54
PARALLEL OUTPUT 54
DISPLAY 54
KEYBOARD 55
FUNCTION NUMBERS 56
SETTING FUNCTIONS
SCAN TIME 56
SCAN YES or NO 56
SCAN UNITS YES or NO 57
SCAN CHANNELS YES or NO 58
DISPLAY INTENSITY 58
BAUD RATE 59
ERROR MESSAGE 59
DEFAULT VALUES 60
RESET 61
INTERNAL CONNECTIONS 61
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TWITE INSTRUMENTS THERMOSTAT MODEL TD-196 OPERATING MANUAL
INSTALLATION
MOUNTING.
The unit should be mounted at eye level for easy viewing and access to keyboard,
using the fixing screws provided. Ensure it is in a dry area and not in direct sunlight.
POWER & SOLENOID CONNECTION.
Power to the main unit must be 240 V a.c. 50 Hz and connected to the terminals
marked A. N. E. The EARTH must be connected to the E terminal. The shield of
the sensor cable must also be connected to the earth terminal.
The supply must be a direct line from the main switch board and not an exten-
sion of other power points etc. AND MUST BE OF THE SAME PHASE AS
THE CONROL POWER SUPPLY
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TWITE INSTRUMENTS THERMOSTAT MODEL TD-196 OPERATING MANUAL
INSTALLATION CONT..
SENSOR INPUT CONNECTIONS.
Sensor cables must be of the SHEILDED type and must not exceed 500 Metres.
Sensor cables should not run parallel or in the same duct as high voltage cables.
The shield of the sensor cable must be connected to the EARTH terminal and must
only be connected at one end, the shield must be continuous at each sensor drop.
Sensors require one wire for common (usually red) and one for positive (usually
black).
If more than one sensor is used (optional extra). The common (usually red) may be
tied to one wire which can be connected to all sensor commons. i.e.. for 8 sensors 9
wires need only be used.
The sensors (if a single sensor is used) negative wire (usually black) must be con-
nected to terminal SEN - and the positive wire (usually red) to SEN +.
Extra sensors (optional extra) positive wire (usually red) must be connected to
terminal SEN + and the negative wire (usually black) must be connected to its
corresponding channel number marked INPUTS 2 to 8 inclusive.
Sensors are numbered before shipment and are calibrated at the factory. Therefore
each sensor’s negative wire (usually black) must be connected to its’ corresponding
sensor input. For instructions on how to re calibrate sensors see CALIBRATE
SENSORS.
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TWITE INSTRUMENTS THERMOSTAT MODEL TD-196 OPERATING MANUAL
INSTALLATION CONT.
SENSOR POSITIONING.
The sensor (and extra sensors, optional extra) may be placed in any convenient
position keeping in mind that if more than one sensor was set to be used for control-
ling, the average of those sensors will the temperature used for control and will be
the temperature displayed in the normal (not scan mode) display mode while display-
ing the temperature.
The sensor or sensors used for control should be placed in the return air section for
cooling, and where applicable for heating.
The distance a sensor may be placed from the unit should not exceed 500 meters
The sensors must not be exposed to temperatures below -50.0 oC or above
+150.0 oC
Sensors and cables should not be fully immersed in any liquid for long periods of
time. They may be immersed for short periods for calibration purposes only. The
stainless steel sheath may be immersed in a liquid that will not corrode AISI 304
Stainless Steel.
PRINTER CONNECTION (RS485).
Up to 16 units (TD-196) can be connected to a printer (a standard EPSON ® or
compatible printer with a SERIAL interface) for printing out of temperatures at
preset times, data logged temperatures and parameter set points.
All units in the chain must have their RS485 - terminals connected
together (in parallel) and their RS485 + terminals connected together (in parallel)
using single twisted pair coaxial cable. The shield must be connected to GROUND at
one end only (not at each unit).
To connect to a printer with an RS232 port, the TD-196's + serial
output must be connected to the rs232 receive input (pin 3 on the 25 pin D connec-
tor) and the ground output/input on the TD-196 connected to the signal ground of the
printer (pin 7 on the 25 pin D connector). The pins 4 & 5 on the 25 pin D connector
must be tied (shorted) together. This type of communication is only available if all
TD-196 units are in close proximity to each other and the printer, (no more than 6
metres).
For longer distances and parrallel interface see later under Printer Communications
and Remote Display Module
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TWITE INSTRUMENTS THERMOSTAT MODEL TD-196 OPERATING MANUAL
INSTALLATION CONT.
ALARM OUTPUTS.
The alarm outputs (ALM terminals) are dry relay outputs which may be connected to
an external voltage source.
The relay is activated (energized) when the alarm is off, allowing an external alarm
(if it has a battery backup connected) to sound if the unit loses power.
The contact rating of the relay is 24 V d.c. 1 A.
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TWITE INSTRUMENTS THERMOSTAT MODEL TD-196 OPERATING MANUAL
DISPLAY FUNCTIONS
LED DISPLAY.
Used to display all parameters and set points etc.
1. 4 Digit Led display to display temps and all other set points etc.
2. Display LED (without the D/M/S LED lit) To display one of the D/M/S
functions press the "ENT" key, then press the s "DIS" key while
holding the "ENT" key pressed, the unit will light the D/M/S LED in
rotation, either off (this function), permanently on (for scan mode), fast
flash (maximum/minimum) or slow flash (data log display).
NOTE :- If the 8 channel option is not present the Display will indicate "Errr".
The following is if the D/M/S LED is not lit, see next page for functions
with the D/M/S LED lit :-
Indicates that one of the following is displayed depending on the LED
display on the right. To change to a different display Press the
s t "DIS" Keys.
1. Current Control temperature. The temperature
used for control, which is dependant on channels
set in CONTROL CHANNEL (Set Point No. 33)
and may be any channel or the average of selected
channels. (channel 1 only if 8 channel multiplexer
is not present).
2. The current temperature set point.
3. The current Differential setting.
4. The High Alarm temperature set point (chan 1).
5. The Low Alarm temperature set point (chan 1).
6. The current Set Point number (1 - 4) (chan 1).
7. The current time in HRS. MIN. (24 hour format).
8. The current Day & Date (day 1 = Sunday).
3. Setting LED :-
Indicates that the unit is in setting mode.
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