PCI MicroTrans II Manual

MicroTransII

Summing Signal Processor

Operation & Maintenance Manual

Engineered for accuracy, applicability,

durability and simplicity in HVAC air systems

and industrial process control loops

MicroTransII Summing Operation & Maintenance Manual

Paragon Controls Incorporated i Revision Level 002

TABLE OF CONTENTS

TABLE OF CONTENTS............................................................................................................................. i

1. INTRODUCTION .............................................................................................................................. 1

1.1. DESCRIPTION............................................................................................................................ 1

1.2. BASIC OPERATION .................................................................................................................. 1

1.3. PI1/D Control Loop...................................................................................................................... 1

1.3.1. PI1/D Parameter Description and Response......................................................................... 1

1.3.2. Correctly Tuned Control Loop.............................................................................................. 2

1.4. SPECIFICATIONS ...................................................................................................................... 2

1.4.1. Power Supply........................................................................................................................ 2

1.4.2. Power Consumption.............................................................................................................. 2

1.4.3. Accuracy ............................................................................................................................... 2

1.4.4. Temperature Input Options................................................................................................... 2

1.4.5. External Flow Input Options................................................................................................. 2

1.4.6. Economizer Override Input Options..................................................................................... 2

1.4.7. System Start Input................................................................................................................. 2

1.4.8. Process (MT2 Measured / Total) Output Options................................................................. 2

1.4.9. Controller Output Options .................................................................................................... 2

1.4.10. High/Low Alarm Relay Outputs ....................................................................................... 2

1.5. SAFETY....................................................................................................................................... 3

1.5.1. Electrical Connections .......................................................................................................... 3

1.5.2. Static Electricity.................................................................................................................... 3

2. PRODUCT DIMENSIONS ................................................................................................................ 4

2.1. MECHANICAL DIMENSIONS.................................................................................................. 4

3. INSTALLATION ............................................................................................................................... 5

3.1. ELECTRICAL & PNEUMATIC INSTALLATION................................................................... 5

3.2. TEMPERATURE TRANSMITTER CONNECTION................................................................. 6

3.2.1. 4-20mA Output/2-Wire Loop Powered Temperature Transmitter ....................................... 6

3.2.2. 0-10VDC Output/24VAC Power 3-Wire Temperature Transmitter .................................... 6

3.2.3. 0-10VDC Output/24VDC Power 3-Wire Temperature Transmitter .................................... 7

3.2.4. 0-10VDC or 4-20mA from a Building Management System (BMS)................................... 7

4. INPUT/OUTPUT SET-UP ................................................................................................................. 8

4.1. TEMPERATURE INPUT (OPTION).......................................................................................... 8

4.2. External AIRFLOW Input............................................................................................................ 8

4.3. Economizer Override Input (Option) ........................................................................................... 8

4.4. Process Output.............................................................................................................................. 8

4.5. Temperature Output ..................................................................................................................... 8

4.6. Controller Output ......................................................................................................................... 9

4.7. Output Voltage Selection ............................................................................................................. 9

5. COMMON STARTUP CONFIGURATION CHANGES................................................................ 10

5.1. AREA FACTOR ........................................................................................................................ 10

5.2. OPERATING RANGE .............................................................................................................. 11

5.3. CONTROLLER PARAMETERS .............................................................................................. 12

5.3.1. Tuning Parameters .............................................................................................................. 12

5.3.2. Controller Setpoint (Internal Value) ................................................................................... 12

5.3.3. Action.................................................................................................................................. 13

5.4. TEMPERATURE COMPENSATION FOR AIR DENSITY.................................................... 14

5.4.1. Temperature Input Signal Selection.................................................................................... 14

MicroTransII Summing Operation & Maintenance Manual

Paragon Controls Incorporated ii Revision Level 002

5.4.2. Temperature Units .............................................................................................................. 14

5.4.3. Temperature Values ............................................................................................................ 15

5.4.4. Temperature Input............................................................................................................... 16

5.4.5. Fixed Value......................................................................................................................... 17

6. ACTIVE DISPLAYS & KEY FUNCTIONS ................................................................................... 18

6.1. POWER-UP INITIATION DISPLAY....................................................................................... 18

6.2. PROCESS DISPLAY DESCRIPTIONS ................................................................................... 18

6.3. KEY FUNCTIONS .................................................................................................................... 19

7. DISPLAY MENUS........................................................................................................................... 20

7.1. FIELD SETUP & TECH. CONFIGURATION MENUS.......................................................... 20

8. FIELD SETUP MENUS................................................................................................................... 21

8.1. OPERATING RANGE .............................................................................................................. 21

8.2. ZERO PRESSURE CALIBRATION......................................................................................... 21

8.3. ENGINEERING UNITS ............................................................................................................ 22

8.4. LOCKDOWN............................................................................................................................. 22

8.4.1. Lockdown Value................................................................................................................. 22

8.4.2. Lockdown Delay................................................................................................................. 23

8.5. FLOW CORRECTION .............................................................................................................. 23

8.5.1. Flow Correction (K-Factor Calculator) .............................................................................. 23

8.5.2. Flow Correction (K-Factor) ................................................................................................ 24

8.6. AUTOZERO .............................................................................................................................. 24

8.6.1. AutoZero Status .................................................................................................................. 24

8.6.2. AutoZero Interval................................................................................................................ 25

8.6.3. AutoZero Test Process........................................................................................................ 25

8.7. TEMPERATURE COMPENSATION ...................................................................................... 25

8.7.1. Temperature Units .............................................................................................................. 26

8.7.2. Temperature Values ............................................................................................................ 26

8.7.3. Temperature Input............................................................................................................... 27

8.7.4. Fixed Value......................................................................................................................... 28

8.8. Measured Flow DISPLAY FILTER .......................................................................................... 28

8.9. External Flow Display Filter ...................................................................................................... 29

8.10. Output Process Filter .............................................................................................................. 29

8.11. Output Temperature Filter ...................................................................................................... 30

8.12. HIGH/LOW ALARM OPTIONS........................................................................................... 31

8.12.1. Alarm Status.................................................................................................................... 31

8.12.2. Alarm Values................................................................................................................... 31

8.12.3. Alarm Delay .................................................................................................................... 32

8.13. DP DISPLAY FORMAT ....................................................................................................... 32

8.14. FACTORY DEFAULTS ........................................................................................................ 33

9. TECH CONFIGURATION MENUS ............................................................................................... 34

9.1. CONTROLLER PARAMETERS .............................................................................................. 34

9.1.1. Controller Display............................................................................................................... 34

9.1.2. Tuning Parameters .............................................................................................................. 34

9.1.3. Action.................................................................................................................................. 35

9.1.4. Controller Setpoint (Internal Value) ................................................................................... 35

9.1.5. Output Start......................................................................................................................... 36

9.1.6. Alarm On/Off...................................................................................................................... 37

9.1.7. Output Override .................................................................................................................. 37

9.1.8. System Alarm Delay ........................................................................................................... 37

MicroTransII Summing Operation & Maintenance Manual

Paragon Controls Incorporated iii Revision Level 002

9.1.9. Economizer Override .......................................................................................................... 38

9.2. AREA FACTOR ........................................................................................................................ 38

9.3. TRANSDUCER CALIBRATION ............................................................................................. 40

9.3.1. Minimum Calibration.......................................................................................................... 40

9.3.2. 50% Calibration .................................................................................................................. 40

9.3.3. Span Calibration.................................................................................................................. 41

9.4. TEMPERATURE FIXED VALUE (No Temp Comp Option).................................................. 41

9.5. External Flow Source ................................................................................................................. 42

9.6. External Flow Span .................................................................................................................... 42

9.7. altitude........................................................................................................................................ 43

9.8. PROCESS OUTPUT MENU ..................................................................................................... 44

9.8.1. Output Selection.................................................................................................................. 44

9.8.2. Voltage Output Level Select............................................................................................... 45

9.8.3. Minimum Calibration.......................................................................................................... 45

9.8.4. Span Calibration.................................................................................................................. 46

9.9. TEMPERATURE OUTPUT MENU ......................................................................................... 46

9.9.1. Voltage Output Level Selection.......................................................................................... 46

9.9.2. Minimum Calibration.......................................................................................................... 47

9.9.3. Span Calibration.................................................................................................................. 47

9.10. CONTROLLER OUTPUT MENU ........................................................................................ 48

9.10.1. Voltage Output Level Selection ...................................................................................... 48

9.10.2. Minimum Calibration...................................................................................................... 48

9.10.3. Span Calibration.............................................................................................................. 49

9.11. CORRECTION COEFFICIENT ............................................................................................ 49

9.11.1. Probe Coefficient............................................................................................................. 49

9.11.2. Piezometer Ring Coefficient ........................................................................................... 50

9.12. FOUR POINT FLOW CORRECTION.................................................................................. 51

9.13. MAC ADDRESS (BACNET COMMUNICATION OPTION)............................................. 52

9.14. INSTANCE NUMBER (BACNET COMMUNICATION OPTION) ................................... 52

9.15. MODBUS ID (MODBUS COMMUNICATION OPTION).................................................. 53

9.16. BAUD RATE (BACNET & MODBUS COMMUNICATION OPTIONS).......................... 53

10. WARNING MESSAGES .............................................................................................................. 54

10.1. INPUT PRESSURE OVERRANGE MESSAGE .................................................................. 54

10.2. TRANSDUCER CALIBRATION MESSAGE...................................................................... 54

10.3. OPERATING RANGE MESSAGE ....................................................................................... 54

10.4. NEW OPERATING RANGE MESSAGE ............................................................................. 55

11. TROUBLESHOOTING GUIDE ................................................................................................... 56

MicroTransII Summing Operation & Maintenance Manual

Paragon Controls Incorporated 1 Revision Level 002

1. INTRODUCTION

1.1. DESCRIPTION

The MicroTransII Summing Signal Processor employs current state-of-the-art digital microprocessor

technology to produce highly stable and accurate air flow measurements. The MicroTransII is factory

configured and calibrated to the exact specification determined at time of order. The MicroTransII

Summing Signal Processor is capable of receiving an external air flow signal (4-20mA / 0-10 VDC) ,

summing the two air flow values and displaying the MicroTransII measured air flow and the total air

flow. The MicrotransII offers an optional controller that utilizes a proprietary algorithm which results in

true three mode control incorporating proportional band, integral (reset) and inverse derivative (P, I,

1/D) controller functionality and tuning. The controller will provide responsive modulation of a control

damper or variable speed drive guaranteeing a constant airflow or pressure is maintained. Additional

optional features include AutoZero; High/Low Remote Alarms; Temperature Compensation; and

LonWorks®, BACnet®-MS/TP Master, and Modbus® Slave communication. Simple field

configuration of engineering units, operating range, process noise filtering, alarm set points, etc., are

performed via password protected intuitive menus that are accessed through the integral six button touch

pad. Device monitoring and configuration can also be performed by a building management system

through a LonWorks®, BACnet®-MS/TP Master, or Modbus® Slave communication network.

1.2. BASIC OPERATION

The transducer receives a differential pressure signal from the pressure or flow sensing element. This

signal is scaled and linearized before being displayed along with the total air flow value from an external

transmitter. The process output (4-20mA, 0-5VDC, or 0-10VDC) signal is selectable between the

MicrotransII measured air flow and the total air flow value. The AutoZero option detects and corrects

any zero offset caused by large ambient temperature changes. The Temperature Compensation option

compensates the flow and velocity signal for density changes caused by variations in the process air

temperature; an external temperature transmitter or input signal from the building management system is

required.

1.3. PI1/D CONTROL LOOP

The PI1/D controller measures the difference between the process value and the setpoint value to

determine the error value. The controller continually attempts to remove this error by varying the

control output signal to adjust the variable frequency drive (VFD) or damper. To optimize the control

loop response, the control parameters (Proportional Band [PB], Integrator Time [Reset], and Inverse

Derivative [1/D]) may need to be adjusted.

1.3.1. PI1/D Parameter Description and Response

- Proportional Band (PB): The function of the PB parameter is to amplify the current

error value (process value minus setpoint value) to make a quick control change to a large

error change. The PB adjustment range is 1 to 100%. The formula is Gain = 100% / PB.

For example, a PB setting of 100% is a gain of 1; i.e., it takes a 100% error signal to get a

full response of the controller. Conversely, a PB setting of 10% is a gain of 10; i.e., it

takes a 10% change of the error signal to get a full response of the controller. Therefore,

decreasing the PB value will cause the controller’s response to speed up.

- Integrator Time (Reset): The function of the Reset is to remove any residual error

present after the PB and 1/D functions. The Reset adjustment range is 1 to 300 seconds.

Decreasing the Reset value will cause the controller’s response to speed up.

MicroTransII Summing Operation & Maintenance Manual

Paragon Controls Incorporated 2 Revision Level 002

- Inverse Derivative (1/D): The function of the 1/D parameter is to filter out the noise by

delaying the controller response for a specific time period and then give a quick boost to

the control output signal. The 1/D function helps improve response and stability of the

control loop. The 1/D adjustment range is 1 to 300 seconds. Decreasing the 1/D value

will cause the controller’s response to speed up.

1.3.2. Correctly Tuned Control Loop

A correctly tuned control loop will respond to an error change quickly and return the process to the

setpoint value with minimum overshoot and oscillation, referred to as a critically damped or tuned

system (See Figure 1). The three control parameters operate in concert with each other, however each

has a specific roll in controller response.

MicroTransII Summing Operation & Maintenance Manual

Paragon Controls Incorporated 1 Revision Level 002

1.3.2.1. Poorly Tuned Control Loop

A poorly tuned control loop may respond to an error change too quickly and overshoot the setpoint

value, respond to slowly and never return to setpoint value or continually oscillate above and below the

setpoint value (See Figure 2). For an output that responds too quickly and continues to overshoot,

Paragon Controls suggests increasing the 1/D and Reset values in small increments to slow the response.

An output that gradually approaches the setpoint but never really gets there is too slow. Paragon

Controls suggests decreasing the 1/D and Reset values in small increments to speed up the response.

MicroTransII Summing Operation & Maintenance Manual

Paragon Controls Incorporated 2 Revision Level 002

1.4. SPECIFICATIONS

1.4.1. Power Supply

20 to 28 VAC/DC

1.4.2. Power Consumption

Standard Unit: 192mA at 24VAC

113mA at 24VDC

Full Options: 417mA at 24VAC

229mA at 24VDC

1.4.3. Accuracy

±0.25% full scale (Standard)

±0.10% full scale (Optional)

1.4.4. Temperature Input Options

0-10VDC

4-20mA

1.4.5. External Flow Input Options

0-10VDC

4-20mA

1.4.6. Economizer Override Input Options

0-10VDC

4-20mA

1.4.7. System Start Input

Dry Contact

1.4.8. Process (MT2 Measured / Total) Output Options

0-5VDC

0-10VDC

4-20mA (700Ωmaximum load)

1.4.9. Controller Output Options

0-5VDC

0-10VDC

4-20mA (700Ωmaximum load)

1.4.10. High/Low Alarm Relay Outputs

Two single (1 form C) dry contacts rated for:

5 amps at 30VAC/dc

10 amps at 120VAC

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