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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

Summary of Contents for TD-196

Page 1: ...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...

Page 2: ...E 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...

Page 3: ...ER 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 S...

Page 4: ...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...

Page 5: ...D 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...

Page 6: ...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...

Page 7: ...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 usua...

Page 8: ...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 pr...

Page 9: ...rm 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 batter...

Page 10: ...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 displ...

Page 11: ...ls approx When the desired parameter to be displayed on the right hand LED S release the ENT key that parameter will then be displayed in the SCAN mode If flashing fast it is displaying Maximum Minimu...

Page 12: ...Y BOARD FUNCTIONS SET KEY Pressing the SET key activates the Setting mode If the PASSWORD is active password set to ON Function No 23 see the pass word section on page 14 If the Password is not active...

Page 13: ...rt time of the next defrost start time to the start time of the previously set start time After all required values have been altered or checked the displays will revert to normal run mode after the l...

Page 14: ...o be entered Repeat as for the first number until all 4 numbers have been entered If the correct password was entered the display will show one of the functions that may be altered the s or t keys may...

Page 15: ...r to de select a channel repeat the above sequence until all required channels have been selected The last channel selected or de selected using the t key will be the value shown on the LED when the E...

Page 16: ...rs start up of rooms after a power failure 17 Unit Number for identifying each unit when printing 18 Cooling Heating used to set the unit for Cooling or Heating mode 19 Time sets the real time clock h...

Page 17: ...being set 5 control 1 6 control 2 and 7 control 3 FOR COOLING PRESS SET ENTER PASSWORD IF REQUIRED PRESS s t TO SELECT NUMBER 1 PRESS ENT 1 s t TO SELECT REQUIRED SET POINT 1 TEMPERATURE ON LED PRESS...

Page 18: ...itions Time 1 must be the first time after 00 00 12 midnight followed by time 2 etc Once time 1 is set the unit will not allow time 2 to be set to an earlier time and so on for all time set points If...

Page 19: ...OPTIONAL EXTRA 1 s t TO SELECT REQUIRED HIGH ALARM SET POINT 1 ON LED PRESS ENT 2 4 REPEAT THIS PROCESS FOR SET POINTS 2 3 4 SELECTION COMPLETE 5 LOW ALARM TEMPERATURE SET POINTS Sets the 4 Low alarm...

Page 20: ...MBER 6 PRESS ENT SELECT CHANNELS IF REQUIRED OPTIONAL EXTRA 1 s t TO SELECT REQUIRED HIGH ALARM SET POINT 1 ON LED PRESS ENT SELECTION COMPLETE 7 LOW ALARM DELAY SET POINT Sets the Low alarm Delay Dis...

Page 21: ...s the fans solenoid turn on delay after the refrigeration and suction solenoids turns on from 0 to 10 minutes in 1 minute steps 7 Holds alarms maximum minimum from updating from 0 to 30 minutes 8 Sets...

Page 22: ...O SELECT THE DEFROST DELAY TIME 0 60 MINS 4 s t TO SELECT FANS SUCTION SOL ON OR OFF in the first delay YES no PRESS ENT 5 s t TO SELECT THE REFRIGERATION SOLENOID TURN ON DELAY 0 10 MINS PRESS ENT 6...

Page 23: ...is required set to ON A manual defrost will commence using the manual defrost time set in DEFROST SET on the next minute update If a automatic defrost is already active the manual defrost will not st...

Page 24: ...und if the control is left off PRESS SET ENTER PASSWORD IF REQUIRED s t TO SELECT NUMBER 11 PRESS ENT 1 s t TO SELECT AUtO or OFF PRESS ENT SELECTION COMPLETE 12 FANS CONTINUOUS OR AUTOMATIC Sets whet...

Page 25: ...PRESS ENT 1 8 PRESS s TO SELECT WHICH CHANNEL ON THE RIGHT HAND LEDS PRESS t TO SELECT YES OR no FOR THAT CHANNEL PRESS ENT SELECTION COMPLETE 14 LOW ALARM ACTIVE YES NOT ACTIVE NO Sets whether the l...

Page 26: ...to either TOP BOT or MID This means that the set point can be at the top bottom or middle of the turn on and turn off temperatures PRESS SET ENTER PASSWORD IF REQUIRED s t TO SELECT NUMBER 15 PRESS EN...

Page 27: ...at once after a power failure PRESS SET ENTER PASSWORD IF REQUIRED PRESS s t TO SELECT NUMBER 16 PRESS ENT 1 s t TO SELECT DELAY FROM 0 TO 600 SECONDS ON LED PRESS ENT SELECTION COMPLETE 17 UNIT NUMB...

Page 28: ...D s t TO SELECT NUMBER 18 PRESS ENT 1 s t TO SELECT COOL or HEAt PRESS ENT SELECTION COMPLETE 19 SET REAL TIME CLOCK Sets the Real Time Clock Each time element i e hours minutes seconds day date month...

Page 29: ...ry 15 30 60 120 minutes or 1 to 4 times per day or none no print at preset times PRESS SET ENTER PASSWORD IF REQUIRED s t TO SELECT NUMBER 21 PRESS ENT SELECT CHANNELS IF REQUIRED OPTIONAL EXTRA 1 s t...

Page 30: ...that more is to be entered 1 5 s t TO SELECT THE TIME OF DAY FOR THE FIRST PRINT TIME 00 00 TO 23 59 PRESS ENT REPEAT FOR THE OTHER 3 TIMES TO PRINT IN THE 24 HOUR PE RIOD IF LESS THAN 4 TIMES ARE REQ...

Page 31: ...e PRESS ENT If any except 1 4 was selected SELECTION COMPLETE If 1 4 was selected 2 5 s t TO SELECT THE TIME OF DAY FOR THE FIRST PRINT TIME 00 00 11 59 PRESS ENT REPEAT FOR THE OTHER 3 TIMES TO LOG I...

Page 32: ...E IF THE PASS WORD IS INACTIVE OFF THE PASS WORD CANNOT BE CHANGED IF CHANGE PASSWORD IS SELECTED WITH THE PASSWORD REQUIRED IS SET TO OFF THE UNIT WILL RETURN TO NORMAL RUNNING MODE WHEN THE ENT KEY...

Page 33: ...oid has turned off Allows for the pumping out of the evaporator PRESS SET ENTER PASSWORD IF REQUIRED PRESS s t TO SELECT NUMBER 25 PRESS ENT 1 s t TO SELECT REQ PUMP DOWN TIME IN SECONDS ON LED PRESS...

Page 34: ...t number for that day or yes for that set point number for that day If pressed again it will toggle between n not to use and the set point number to use The set point number that is flashing is the se...

Page 35: ...feed also sends its time of day before it sends its temperature and line feed NOTE If a unit is set to do a line feed and time it will send its time and data then send a page break and heading the fir...

Page 36: ...EL PRESS ENT SELECTION COMPLETE 31 SCAN TIME Sets the time between channel scan from 1 to 50 i e 50 10 sec 25 5 1 1 4 sec approx PRESS SET ENTER PASSWORD IF REQUIRED PRESS s t TO SELECT NUMBER 31 PRES...

Page 37: ...used in the averaging process If average of selected channels was selected more than one channel set to yes and one or more channel s was were in over range fault on sensor cable or faulty sensor the...

Page 38: ...BAUD RATE ON LED PRESS ENT SELECTION COMPLETE 36 LONG TERM OR PULL DOWN MODE SETTING Sets whether the Suction solenoid is on during refrigeration or not The long term mode is used for systems that ha...

Page 39: ...39 TWITE INSTRUMENTS THERMOSTAT MODEL TD 196 OPERATING MANUAL SETTING FUNCTIONS CONT...

Page 40: ...e Display Module see REMOTE DISPLAY All units must be set to have a unique identity number 1 16 inclu sive As each unit prints its temperature at preset times it places its data in its relative positi...

Page 41: ...ED AS LISTED IN THE FOLLOWING TABLE TO CHANGE TO A DIFFERENT FUNCTION PRESS THE UP OR DOWN KEY FROM 1 TO 10 TO SELECT THE FUNCTION WHEN THE CORRECT NUMBER IS DISPLAYED FOR THE REQUIRED FUNCTION PRESS...

Page 42: ...42 TWITE INSTRUMENTS THERMOSTAT MODEL TD 196 OPERATING MANUAL CALIBRATION AND DEFAULT VALUES CONT...

Page 43: ...h value and displaying the low value of the selected channel If no alteration is necessary press the SET key while the CAL switch is depressed the display will then show done press the ENT key to rese...

Page 44: ...that the calibration values have been altered or are corrupt To rectify this first check that all calibration values are checked by using the previous function CALIBRATE VALUES CHECK AL TER After doin...

Page 45: ...lt Value but unlike the Start up Default the Clock does not Kick Start and the calibration values are not changed LED shows d P Press the ENT key for reset and normal operation KICK START THE REAL TIM...

Page 46: ...LLOWING PAGE PRESS SET ENTER PASSWORD IF REQUIRED s t TO SELECT 29 CHANNELS CONNECTED PRESS ENT SELECT OR DESELECT CHANNELS AS REQUIRED ENSURING ONLY CHANNELS TO BE CALIBRATED REMAIN CONNECTED BY PRES...

Page 47: ...if the CAL button is not held pressed the unit will give a double beep and the value will not be updated into E2PROM if only one beep is heard the value will have been updated into the E2PROM correct...

Page 48: ...s minimum No TEMPERATURE SET POINTS COOLING 4 1 per set time No TEMPERATURE SET POINTS HEATING 12 3 each at 4 set point times NUMBER OF HIGH LOW ALARM SET POINTS 4 high 4 low at 4 set point times SET...

Page 49: ...RANGE YES or NO DEFROST REF TURN ON DELAY RANGE 0 min 10 min DEFROST FANS TURN ON DELAY RANGE 0 min 10 min DEFROST HOLD OFF DELAY RANGE 0 min 30 min holds alarms max min from updating NUMBER OF DEFROS...

Page 50: ...UPLEX 2 wire maximum distance 1200 meters coax twisted pair BAUD RATE 110 300 1200 2400 4800 9600 STOP BITS 1 fixed PARITY none fixed OUTPUT RELAYS RATING ALL 240v AC 2AMPS each output POWER SUPPLY 24...

Page 51: ...on all set points while the unit was running and was not reset by the watch dog independent timer for the micro processor run time check is corrupt The alarm will sound and all controls will be turned...

Page 52: ...lty only if the 8 channel multiplexer option is present is used as the control sensor only the alarm will sound and all controls will be turned off If it is used as one of the sensors in an average of...

Page 53: ...equires 8 to 12 volts a c or d c at 300 ma A common 240 ac adapter which supplies a low voltage output within this range should be used The polarity of the low voltage input to the TD 196R is irreleva...

Page 54: ...r this application PRINTER OUTPUT The printer output is a standard serial 25 pin D connector type and may be connected to any EPSOM compatible LX300 recommended printer s serial input port The output...

Page 55: ...P arrow and scan key is used to select the next temperature unit channel to display while not setting functions If setting functions this key is used to increase the value of the function and to incre...

Page 56: ...ntensity varies the brightness of the display 6 Baud Rate sets the baud rate stop bits 1 and no parity SETTING FUNCTIONS 1 SCAN TIME Sets the time between channel scan from 1 to 50 i e 50 10 sec 25 5...

Page 57: ...l time out after approximately 1 minute and not display scan that unit but will not alter the set point This means that if a TD 196 unit is then connected to the serial line the remote display will au...

Page 58: ...TD 196 unit is then connected to the serial line the remote display will automatically pick up the information and proceed to display scan this TD 196 unit channels If a TD 196 unit is connected to th...

Page 59: ...RESS s t TO SELECT NUMBER 6 PRESS ENT s t TO SELECT REQUIRED BAUD RATE ON LED PRESS ENT SELECTION COMPLETE ERROR MESSAGE If this is displayed on the 4 digit display the remote display has lost the ser...

Page 60: ...hen all LED S are lit press the ENT key to reset the unit for normal running It may take up to 30 seconds for the Remote display to respond to the TD 196 units data for display 2 If the battery backed...

Page 61: ...ly if required First remove the right hand side panel and slide the front panel with circuit board out Turn over to expose the underside of the circuit board The screw connections are placed next to t...

Page 62: ...62 TWITE INSTRUMENTS THERMOSTAT MODEL TD 196 OPERATING MANUAL CALIBRATION VALUES CHANNEL NUMBER HIGH LOW 1 2 3 4 5 6 7 8...

Page 63: ...63 TWITE INSTRUMENTS THERMOSTAT MODEL TD 196 OPERATING MANUAL NOTES...

Page 64: ...64 TWITE INSTRUMENTS THERMOSTAT MODEL TD 196 OPERATING MANUAL NOTES...

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