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Twite Instruments MultiScan TD-32-MT Operating Manual

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MultiScan
OPERATING MANUAL
MODEL TD-32-MT
TD-32 SERIES
UP/DOWN
PUSH FOR
SETTING
SELECTING
ENTER
AUSTRALIAN MADE
Lq=| Suc=| F=| Def=O
Contrl Tmp +22.1
Set Point
Set Point Number 4
INSTRUMENTS
INSTRUMENTS
oC
+18.0
oC

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Summary of Contents for Twite Instruments MultiScan TD-32-MT

  • Page 1 MultiScan OPERATING MANUAL MODEL TD-32-MT TD-32 SERIES INSTRUMENTS UP/DOWN Lq=| Suc=| F=| Def=O Contrl Tmp +22.1 Set Point +18.0 PUSH FOR Set Point Number 4 SETTING SELECTING ENTER AUSTRALIAN MADE INSTRUMENTS...
  • Page 2 Twite Instruments (REC & BJ Twite). 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 (REC & BJ Twite). Products are found to be respon- sible for the loss of any product, produce or buildings.

  • Page 3: Table Of Contents

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL Contents Mounting Dimensions Terminal Numbers and Position MultiScan positioning and Mounting Control Output Power Connections MultiScan Digital Temperature Input Terminals 11-12 MultiScan Analog Temperature Input Terminals 13-14 Temperature and pressure channels used for control 15-16 MultiScan Pressure &...
  • Page 4 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL Contents SETTING FUNCTIONS 60-64 Overview 60-61 Functions and the No. of each 61-93 "Control Auto or OFF" "Temperature set Pnts" "Temp're Differential" "Temp Diff'tial Type" "Temp Time Set Points" "Daily Set Points Use"...
  • Page 5 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL Contents "Test Display/Rst log" "Set Dig Temp Offset" "Set PT100 Tmp Offset" "Add Dig Temp Sensor" "Set RS485/232 Baud" "Set Room ID Number" "Display Brightness" "Number of Resets S/N" "TempScan Connected" "Reset Room Run Hours"...
  • Page 6 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL Contents "Comp Stg 1 Dly YesNo" "Compre'r Step Amount" "Compressor Min % Run" "Comp Proportional Ct" "Reset Comp'sor Hours" "Temp Sen's Comp Suc" "Compressor Number ID" "Type of Condenser" "Condenser Set Point" "Condenser Diff'tial"...

  • Page 7: Mounting Dimensions

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION :- Din Rail Mount Size of Unit. 90mm...

  • Page 8: Terminal Numbers And Position

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION :- Terminal Numbers.

  • Page 9: Multiscan Positioning And Mounting

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION :- MultiScan positioning and Mounting. The unit should be mounted at a level for easy viewing and access to setting knob, using the DIN rail mounting to mount to the DIN rail within the cabinet. Ensure it is in a dry area and not in direct sunlight and not subject to any vibration.

  • Page 10: Control Output Power Connections

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. Control Output Power Connections :- Power for compressor and condenser control can be up to 24 V ac. and connected to the terminal Block MultiScan Control Output Power Connections. Voltage on any control output and common must not exceed 24 volts AC and Total Current of all outputs Must Not Exceed 5 amps.

  • Page 11: Multiscan Digital Temperature Input Terminals

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. MultiScan Digital Temperature Input Terminals :- DS18B20 Digital Type (up to 8 temperature sensors may be connected):- Temperature probes are fitted with 1 meter of cable each (may be extended to a maximum distance of 100 meters using twisted pair shielded cable).
  • Page 12 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. MultiScan Digital Temperature Input Terminals Cont :- DS18B20 Digital Type. Up to 8 temperature sensors may be connected SHIELD--GROUND SIGNAL--BLUE WIRE + POSITIVE--WHITE WIRE Types of sensors Available PROBE PLASTIC SHEATH 40 X 6 MM APPROX.

  • Page 13: Multiscan Analog Temperature Input Terminals

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. MultiScan Analog Temperature Input Terminals :- PT100 Analog Type (up to 7 temperature sensors may be connected) or AD590 Anolog Type (up to 7 temperature sensors may be connected) But not both types on the same MultScan.
  • Page 14 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. MultiScan Analog Temperature Input Terminals cont:- PT100 Analog Type (up to 7 temperature sensors may be connected):- Terminal No. 57 - Shield of each cable. 58 - Sensor number 1 first wire.

  • Page 15: Temperature And Pressure Channels Used For Control

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. MultiScan Analog Temperature Input Terminals cont:- SENSORS CONNECTED AD590 SENSOR No 7 SENSOR No 6 SENSOR No 5 SENSOR No 4 SENSOR No 3 SENSOR No 2 SENSOR No 1 SHIELD...
  • Page 16 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. Temperature and pressure channels used for control cont:- Compressor control: Suction pressure or temperature can be used for compressor control. If pressure is used the pressure input used is Suction Pressure, 4-20ma input number 1.

  • Page 17: Multiscan Pressure & 4-20Ma Input Terminals Up To 8 Possible

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. MultiScan Pressure & 4-20ma Input Terminals Up to 8 Possible:- Pressure transducers must be of the 4 to 20ma type and a recommended span of -1 Bar to +24 Bar. Other spans may be used if required and the span may be programmed into the MultiScan.
  • Page 18 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. MultiScan Pressure & 4-20ma Input Terminals cont.:-...

  • Page 19: Multiscan Digital Input Terminals

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. MultiScan Digital Input Terminals:- 8 Digital inputs are supplied of which 5 are used. All inputs are optically isolated. Each Digital input is ON if its input is connected (shortage) to the COM pin of the digital input terminal strip and OFF if not connected (open circuit) if the function "Digital IN Inverted"...
  • Page 20 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. CompScan Digital Input Terminals cont.:- Descriptions:- 21 - Common for all 8 digital inputs. 20 - Remote RUN input. (IF NOT USED THE UNIT WILL RUN ON START UP IF FUNCTION 1 (CONTROL AUTO OR OFF) IS SET TO YES).

  • Page 21: Multiscan 4-20Ma Current Input Terminals

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. MultiScan 4-20ma Current Input Terminals:- The current input is via a 4-20ma transducer and can be loop powered or not. Shown below are the two ways of interfacing the transducer to the MultiScan.
  • Page 22 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. MultiScan 4 to 20 ma Output Terminals:- The 4 - 20ma outputs are for variable speed motor on the compressor and or variable speed condenser fan motors It is recommended that a 4-20ma isolator is used. The components are available from the manufacturer and must be wired as shown below.

  • Page 23: Multiscan Alarm And Output Terminals

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. MultiScan Alarm and Output Terminals:- The Alarm Relay is of the voltage free type with a common, normally connected and normally not connected outputs. The maximum voltage that can be applied to the alarm relay contacts is 24v AC/DC at 1AMP.

  • Page 24: Multiscan Rs485 Terminals

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. MultiScan RS485 Terminals:- TempScan Connected :- The RS485 terminals are used for communicating with the compressor section and is controlled by the TempScan. The Equalizer solenoid is not available in this mode.

  • Page 25: Multiscan Rs485 Terminals

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. MultiScan RS485 Terminals:- TempScan Connected cont. The connection to each unit must be continuous from the TempScan then one to the next then the next etc.. The units must be connected in a daisy chain configuration and not spider from one point.

  • Page 26: Multiscan 2 Wire Serial Inputs

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. MultiScan 2 Wire Serial Inputs :- TempScan Connected cont. If a TempScan is connected to the MultiScan, the 2 wire serial connections is re- quired for the TempScan to control the room temperature and defrost sections of the...
  • Page 27 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. MultiScan 2 Wire Serial Inputs :- TempScan Connected cont. The first display (Lq = | Suc=| F=| Def = O on top line) will indicate on the 2nd line at the right hand position "--" if no communications are received from the TempScan after 10 seconds and will display "cn"...
  • Page 28 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. MultiScan 2 Wire Serial Inputs :- TempScan Connected cont. To set the DIP switch. Remove the knob by pulling straight out. Remove the front panel by levering it out from the display end and two sides (top and bottom) using a small screw driver being careful not to damage the front panel or the unit.

  • Page 29: Multiscan Rs232 Terminals

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. MultiScan RS232 Terminals:- All MultiScan units have a RS232 port. Computer or Modem Connected:- A Computer is allowed to be connected if The MultiScan unit is set to "Single Stand Alone".

  • Page 30: Lcd Display Contrast Adjust

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. LCD Display Contrast Adjust. This trim pot adjusts the intensity of the LIQUID CRYSTAL DISPLAY. This should not normally need adjusting. Remove the knob by pulling straight out. Remove the front panel by levering it out from the display end and two sides (top and bottom) using a small screw driver being careful not to damage the front panel or the unit.

  • Page 31: Battery Replacement

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. Battery Replacement. If the backup battery needs replacing, the display will flash "Replace Battery" on the bottom line each second. Turn off the power to the unit. Remove the knob by pulling straight out.

  • Page 32: Program Chip Replacement

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. Program Chip Replacement. If the program chip needs replacing do the following. Turn the power off to the unit. Remove the knob by pulling straight out. Remove the front panel by levering it out from the display end and two sides (top and bottom) using a small screw driver being careful not to damage the front panel or the unit.

  • Page 33: Expansion Socket

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. Expansion Socket. The Expansion socket is used for other modules to be added if required. Additional LED panel display is available as an optional extra. To install the LED panel display, follow the below diagrams and connect the cable from the TD-32-MT expansion socket (making sure the orientation is correct) to the INPUT socket of the TD-32-D board (making sure the orientation is correct).
  • Page 34 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. Expansion Socket cont. The LED display can be mounted onto a front panel. If the LED display touches the front bezel before the unit is secure, use the washers to set the circuit board back so that the display does not touch the bezel.
  • Page 35 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. Expansion Socket cont...

  • Page 36: Sensor Positioning And Placement

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL INSTALLATION CONT. Sensor Positioning (temperature and Pressure) :- Temperature probes and Pressure transducers must be placed in the appropriate posi- tions in give accurate readings of the process required. The temperature sensors must not be exposed to temperatures below -50.0 o C or above +125.0 o C...

  • Page 37: Using 4 Set Points For Temperature Control

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL OPERATION. Using 4 Set points for Temperature Control :- Up to 4 Temperature set points may be used for Temperature Control and Tempera- ture Alarms for each day of the week. These 4 set points (set in function "SET POINT TIMES") are associated with 4 times of the day, each day of the week use the same 4 times.

  • Page 38: Defrost Control

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL OPERATION CONT. Defrost Control :- Up to 8 Defrosts can be programmed per 24 hour day. Full control of delays and drain times are provided including pump down and automatic and manual defrosts.

  • Page 39: Compressor Control

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL OPERATION CONT. Compressor Control:- The compressor may be controlled using the suction pressure or temperature. If temperature control is used, the sensor or sensors may be selected from any one or multiple sensors. If multiple sensors are selected, it uses the average of selected sen- sors for control.
  • Page 40 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL OPERATION CONT. Compressor Control cont:- Number of hard piped stages can be entered to allow for correct indication of stages loaded. This is the number of stages that are active (on) when the motor starts.
  • Page 41 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL OPERATION CONT. Compressor Control cont:- Compressor proportional control. The proportional control can be used to decrease the time between loading and unload the compressor stages and or the percentage of speed. If 0 is selected, no proportional control is used.

  • Page 42: Condenser Control

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL OPERATION CONT. Condenser Control:- The condenser may be controlled using the condenser discharge pressure or tem- perature. If temperature control is used, the sensor or sensors may be selected from any one or multiple sensors. If multiple sensors are selected, it uses the average of selected sensors for control.
  • Page 43 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL OPERATION CONT. Condenser Control cont:- Condenser proportional control. The proportional control can be used to decrease the time between loading and unload the condenser stages and or the percentage of speed. If 0 is selected, no proportional control is used.

  • Page 44: Alarm Action

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL OPERATION CONT. Alarm Action:- Some alarms will turn the system off and some will indicate the alarm but the system will still run. If any sensor used in a control temperature/pressure goes into alarm, that control temperature/pressure will alarm and the system will shut down.
  • Page 45 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL OPERATION CONT. Alarm Action cont.:- The following is the display for each alarm and its meaning. The N = No alarm on this input. The S = the system will shut down if this goes into alarm and A = Only an alarm will sound on this input but the system will continue to run.

  • Page 46: Alarm History

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL OPERATION CONT. Alarm Action cont.:- 32 "Remote OFF" Digital input to shut the system down. (10 sec delay). 33 "Motor Aux" Digital input from a faulty compressor. (10 sec delay). 34 "Water Jack"...

  • Page 47: Data Logging

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL OPERATION CONT. Alarm History cont:- If no alarm is in a position, the following will be displayed. lArm istory Hows 40 A lArms lArm DATA LOGGING. Data logging is done on the times set in the functions setting and can log at the below times.

  • Page 48: Up/Down Knob And Switch Functions

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL DATA LOGGING CONT. Press the knob for 3 seconds to revert to the normal run display pages. The display will revert to the time display (page 1) after 240 seconds if nothing is pressed or turned.
  • Page 49 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL DISPLAY PAGES. The following displays are available by rotating the "ROTARY/PUSH" knob clock- wise and anticlockwise while no setting of functions is being done. NOTE: If after 240 seconds the knob was not used, the display will revert to page 1.

  • Page 50: Display Pages

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL DISPLAY PAGES CONT. Page 2: The time and date on the top line. The temperature of the digital sensor number 1 on the second line. The temperature of the digital sensor number 2 on the third line.
  • Page 51 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL DISPLAY PAGES CONT. Page 4: The temperature of the digital sensor number 4 on the second line. The temperature of the Analog sensor number 1 on the second line. The temperature of the Analog sensor number 2 on the third line.
  • Page 52 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL DISPLAY PAGES CONT. Page 6: The compressor status on the top line. The 1234 = each stage that is on, the E = equalizer solenoid is on and the 50% is the percentage of the variable speed drive output if used or if start to start time out is active the time left in seconds will be displayed.
  • Page 53 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL DISPLAY PAGES CONT. Page 8: The status of all 8 digital inputs on the top line. O=Off |=ON N=Not-Con on the second line. Each digital input number on the third line. The status of each digital input on the fourth line...
  • Page 54 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL DISPLAY PAGES CONT. Page 10: Data Logged Page. To display data logged, rotate the knob until the data logg display page is displayed, displays "Data Logged Display" on the top line. Press the knob briefly to hold the display. Rotating the knob will go to the next/pre- vious time to be displayed.
  • Page 55 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL DISPLAY PAGES CONT. Page 11: Alarms Page. To scroll though and alarms, turn the knob to the alarm page and press the knob once then turn the knob clockwise or anticlockwise to display each alarm.
  • Page 56 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL DISPLAY PAGES CONT. Page 12: Alarm History Page. The alarm history displays the last 40 alarms that were active. After 40 alarms have been logged the next alarm is placed over the first alarm that was saved and each suc- cessive alarm placed over the next earliest alarm etc..
  • Page 57 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL DISPLAY PAGES CONT. Page 13: The number of hours the compressor has run on the top line. The number of hours the condenser fans have run on the second line. The number of hours the room has run on the third line.

  • Page 58: Password

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL PASSWORD:- Users Password :- When the password is required (can be turned on or off) the display will request the password when “SET” knob is pressed then "ENTER" knob is pressed to select that function to change/check with the following message.

  • Page 59: Change Password

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL PASSWORD CONT.:- Change Password (use "SET" knob, "ENTER" knob, rotate UP/DOWN knob.) Allows the Password to be changed. If the Password is inactive (i.e.. is set to OFF) this function will automatically require the users password before you can change it.

  • Page 60: Setting Functions

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL SETTING FUNCTIONS. Overview: To set any function, the following switches are used:- If the password is required, then it must be entered before any function can be changed. The large knob is used for "SET FUNCTIONS" key on the first press and then be- comes the "ENTER"...
  • Page 61 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL SETTING FUNCTIONS. Overview cont.: When a flashing cursor is displayed on the Liquid Crystal Display the Value or Func- tion may be changed to another by rotating the knob (“UP/DOWN”). After the correct value has been entered press the “ENTER” knob and the value will be entered into memory for all the channels selected if required and will not be af- fected by a power failure.

  • Page 62: Functions And The No. Of Each

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS. Functions and the No. of each:- "Control Auto or OFF" Turns the system to run on auto or off. "Temperature set Pnts" Sets 4 temperature set points for room control. "Temp're Differential"...
  • Page 63 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. Functions and the No. of each cont:- "Set Analog Tm Offset" Set the Analog temperature sensors offset. "Add Dig Temp Sensor" Add a new digital temperature sensor. "Set RS485/232 Baud" Set the baud rate for serial communications.
  • Page 64 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. Functions and the No. of each cont:- "Comp Stg 1 Dly YesNo" Compressor stage 1 use delay yes or no. "Compre'r Step Amount" Step % amount for each load step for compressor.

  • Page 65: Control Auto Or Off

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Control Auto or OFF” Sets whether the room control is on automatic or off. There is no manual on control for safety. PRESS “KNOB” ROTATE KNOB   TO SELECT "Control Auto or OFF" on bottom line.

  • Page 66: Temp Time Set Points

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Temp Time Set Points” Sets the 4 Set Point Times associated with the 4 Temperature set points and Temperature Alarm set points. The first set point time must be the time closest to midnight.

  • Page 67: Fans Manual 1 Day Wk

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Fans Manual 1 Day Wk” This set point is for allowing the fans in a room to be on manual (continuously) for 1 day of the week every week. The fans will be on manual for the selected day from 12:00 AM to 12:00 midnight of the day required.

  • Page 68: Defrost Start Times

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Defrost Start Times” Sets the 8 Times that an automatic defrost can be done in each 24 hour day. Time one must be the first time after 00:00 (midnight) etc. If less than 8 times per day are required set the remaining times not required to the same last time the last defrost is required.

  • Page 69: Do A Manual Defrost

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Do a Manual Defrost” Selects whether the unit does a Manual Defrost, Resets to "no" when finished defrost. PRESS “KNOB” ROTATE KNOB   TO SELECT "Do a Manual Defrost" on bottom line.

  • Page 70: Power On Start Delay

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Power On Start Delay” Sets the Turn on Delay in minutes for the system to start after a reset or power failure. PRESS “KNOB” ROTATE KNOB   TO SELECT "Power On Start Delay" on bottom line.

  • Page 71: Hi Temp Alarm Delay

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Hi Temp Alarm Delay” Sets the high alarm temperature delay for temperature sensors. Only sensors that are set to "Connected" will be available for selection. PRESS “KNOB” ROTATE KNOB   TO SELECT "Hi Temp Alarm Delay" on bottom line.

  • Page 72: Set Data Logging

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Set Data Logging” Sets the data logging times (puts information values and time) into memory for retrieval latter via the display, printer or computer. PRESS “KNOB” ROTATE KNOB   TO SELECT "Set Data Logging" on bottom line.

  • Page 73: Dig Temp's Connected

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Dig Temp's Connected” Sets whether each digital type temperature sensor is connected or not. All digital sensors may be selected in this function. PRESS “KNOB” ROTATE KNOB   TO SELECT "Dig Temp's Connected" on bottom line.

  • Page 74: Temp Sen's For Core

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Temp Sen's for Core” Sets the temperature sensors that are used for the core probe. All sensors (both digital and PT100) that are set to "Connected" will be available for selection. If more than one sensor is selected, the average of the selected sensors will be used for the core temperature.

  • Page 75: Password Yes/No

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Password YES/NO” Selects whether the Password is required for setting functions or not. PRESS “KNOB” ROTATE KNOB   TO SELECT "Password YES/NO" on bottom line. PRESS “KNOB” ENTER PASSWORD IF REQUIRED ROTATE KNOB ...

  • Page 76: Test Display/Rst Log

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Test Display/Rst Log” Displays the model number and version number and resetS the data logged to nothing logged. PRESS “KNOB” ROTATE KNOB   TO SELECT "Test Display/Rst Log" on bottom line.

  • Page 77: Add Dig Temp Sensor

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Add Dig Temp Sensor” All digital temperature sensors have a unique serial number embedded within the sensor. To add a sensor or replace an existing sensor, do the following. Remove all currently connected senors (hard wired). Place the new sensor into the correct terminals and do the following.

  • Page 78: Display Brightness

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Display Brightness” Sets the brightness of the displays back light. 0 = off and 255 = full on. PRESS “KNOB” ROTATE KNOB   TO SELECT "Display Brightness" on bottom line.

  • Page 79: Press's Connected

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “4-20ma Inp Connected” Sets whether each pressure transducer (or any 4-20ma input) is connected or not. All 8 channels may be selected in this function. PRESS “KNOB” ROTATE KNOB   TO SELECT "4-20ma Inp Connected" on bottom line.

  • Page 80: High Alarm 4-20Ma In

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “High Alarm 4-20ma In” Sets the high alarm pressure inputs and 4-20ma inputs. Only sensors that are set to "Connected" will be available for selection. PRESS “KNOB” ROTATE KNOB   TO SELECT "High Alarm 4-20ma In" on bottom line.

  • Page 81: Lo 4-20 Alarm Delay

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Lo 4-20 Alarm Delay” Sets the low alarm delay for pressure inputs and 4-20ma inputs. Only sensors that are set to "Connected" will be available for selection. PRESS “KNOB” ROTATE KNOB   TO SELECT "Lo 4-20 Alarm Delay" on bottom line.

  • Page 82: Type Of Compressor

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Type of Compressor” Sets the type of compressor that is connected to the unit. PRESS “KNOB” ROTATE KNOB   TO SELECT "Type of Compressor" on bottom line. PRESS “KNOB” ENTER PASSWORD IF REQUIRED ROTATE KNOB ...

  • Page 83: Comp Slow Load Time

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Comp Slow Load Time” Sets the slow load time in seconds that the compressor is loaded to the next stage using the control value divided by 2. If the proportional setting is more than 0, this time is automatically adjusted down as the set point increases to the actual control value.

  • Page 84: Comp'or Unload Time

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Compr'or Unload Time” Sets the unload time in seconds that the compressor is unloaded to the previous stage using the control value divided by 2. If the proportional setting is more than 0, this time is automatically adjusted down as the set point increases to the actual control value.

  • Page 85: Oil Purge Interval

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Oil Return Interval” Sets the time between the oil return solenoid is turned on in minutes. The time the solenoid is on for is set at 5 minutes. The solenoid will not turn on if the oil temperature is below 55.0 degrees Celsius.

  • Page 86: Hard Piped Stages Nu

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Hard Piped Stages Nu” Sets the number of compressor load stages are permanently on. PRESS “KNOB” ROTATE KNOB   TO SELECT "Hard Piped Stages Nu" on bottom line. PRESS “KNOB”...

  • Page 87: 69 "Comp Stg 1 Dly Yesno

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Comp Stg 1 Dly YesNo” Selects whether the compressor stage 1 uses the delay for loading or the compressor starts as soon as the set point is reached. PRESS “KNOB” ROTATE KNOB   TO SELECT "Comp Stg 1 Dly YesNo" on bottom line.

  • Page 88: 72 "Comp Proportional Ct

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Comp Proportional Ct” Sets the amount of PID that is used to control the load and unload times depending on how much difference there is between the set point and the actual value.

  • Page 89: 76 "Type Of Condenser

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Type of Condenser” Sets the type of condenser that is connected to the unit. The first stage, normally the water pump is connected to the stage one of the compressor (motor run) and stages 2 and 3 are fan sages on the condenser.

  • Page 90: 79 "Condenser Load Time

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Condenser Load Time” Sets the load time in seconds that the condenser is loaded to the next stage using the control value divided by 2. If the proportional setting is more than 0, this time is automatically adjusted down as the set point increases to the actual control value.

  • Page 91: 82 "Condenser Min % Run

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Condenser Min % Run” Sets the minimum percentage that each stage will start at when turned on if a variable speed drive is used. PRESS “KNOB” ROTATE KNOB   TO SELECT "Condenser Min % Run" on bottom line.

  • Page 92: 85 "Cond Proportional Ct

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Cond Proportional Ct” Sets the amount of PID that is used to control the load and unload times depending on how much difference there is between the set point and the actual value.

  • Page 93: 88 "Computer Connected

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL FUNCTIONS CONT. “Computer Connected” Sets whether a computer is connected to the unit. If a computer is connected and 4 wire communications to a TempScan is also connected with other modules (CompScans etc.) are also connected, the 4 wire communications from the TempScan cannot be done while this unit is set to "Yes"...
  • Page 94 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL STARTUP DEFAULT SET POINTS & COMPLETE RESET. If for any reason the unit locks up, the unit may be reset and the real time clock restarted and all set points set to the first set of default values by doing the fol- lowing.
  • Page 95 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL SET POINTS CRC:- CYCLIC REDUNDANCY CHECK & LIMP HOME. A CRC check is done on all set points each 5 seconds and if the set points become corrupt for any reason the saved set points will be loaded into all set points for the system to use these set points.
  • Page 96 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL DEFAULT VALUES. "Control Auto or OFF" "Temperature set Pnts" 0.0 oC "Temp're Differential" 1.0 oC "Temp Diff'tial Type" MIDDLE "Temp Time Set Points" ALL 10:00 "Daily Set Points Use" ALL USED EVERY DAY "Fans Auto or Manual"...
  • Page 97 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL DEFAULT VALUES. Default Values cont:- 35 "Set PT100 Tmp Offset" ALL 0.0 oC 36 "Add Dig Temp Sensor" 37 "Set RS485/232 Baud" 9600 38 "Set Room ID Number" 39 "Display Brightness" 40 "Number of Resets S/N"...

  • Page 98: 78 "Condenser Diff'tial

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL DEFAULT VALUES. Default Values cont:- 66 "Comp ON/OFF with Chn" NONE 67 "Comp cntl PRESS-TEMP" PRESSURE 68 "Temp Sen's Comp Ctrl" Dig Temp Number 3 69 "Comp Stg 1 Dly YesNo" 70 "Compre'r Step Amount"...

  • Page 99: Specifications

    TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL SPECIFICATIONS A-32-R ALL SET POINTS ARE FOR INDIVIDUAL CHAN’S WHERE APPLICABLE. TEMPERATURE INPUTS (Digital) 18B20 temperature sensor (Analog) PT100 temperature sensor. MAX TEMPERATURE INPUTS 4-20ma INPUTS SUPPLY 12V DC MAX 4-20ma INPUTS 4-20ma RANGE -200 to +3000 KPA/PPM etc.
  • Page 100 TWITE INSTRUMENTS MultiScan MODEL TD-32-MT OPERATING MANUAL SPECIFICATIONS A-32 CON’T ALARM INPUT short to signal common for instant audi- (DIGITAL ACTIVATE) ble alarm. DATA LOGGING TIME BETWEEN :- 1, 5, 10, 30, 60, 120 minutes or none. DATA LOGGING MAXIMUM 220 loggs.

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