Omega Products OM-3002 Installation Manual

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Owner’s Manual

Trademark Notice

Trademarks and registered trademarks belong to their respective

owners.

Revision 270201



Contents

1. INTRODUCTION..............................................................................................4

2. FEATURES.........................................................................................................4

3. STANDARD ACCESSORIES...........................................................................4

4. OPTIONAL ACCESSORIES............................................................................5

5. SAFETY NOTES................................................................................................5

6. UNIT START-UP AND INITIALIZATION....................................................5

7. GENERAL OPERATION .................................................................................6

8. DATE AND TIME..............................................................................................7

9. BATTERY MANAGEMENT............................................................................7

10. MEASUREMENT SETUP.............................................................................10

11. MEASURE WITHOUT RECORDING........................................................11

12. NEW RECORDING.......................................................................................13

13. REVIEW DATA SET.....................................................................................16

14. MEMORY MANAGEMENT........................................................................18

15. TROUBLESHOOTING.................................................................................20

16. ANALYSIS SOFTWARE ..............................................................................21

17. INSTRUCTIONS............................................................................................21

18. INSTALLING

19. STARTING UP

20. TRANSFERRING DATA TO THE PC........................................................25

21. MANAGING DATA.......................................................................................26

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.......................................................................................24

.......................................................................23

22. CALCULATING DATA................................................................................ 28

23. PLOTTING DATA .........................................................................................29

24. ZOOMING & PANNING..............................................................................30

25. PRINTING CHARTS.....................................................................................30

26. READING AND COMPARING VALUES ..................................................31

27. PLOTTING WATERFALL CHARTS.........................................................33

28. UPGRADING FIRMWARE..........................................................................34

29. APPENDIX 1 SPECIFICATIONS................................................................35

30. APPENDIX 2

31. APPENDIX 3 APPLICATION NOTES....................................................37

32. APPENDIX 4

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MATH........................................................41

CONNECTOR DIAGRAM .....36

1. Introduction

THIS MANUAL COVERS MODEL:

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The

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channels of temperature measurement for temperatures ranging from -200 to +850°C (-328 to +1562°F) depending on RTD sensor type.

in the

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allows the user to simultaneously take six

2. Features

24-bit A/D converter providing high precision measurements

128 kilobyte non-volatile memory capable of storing 100,000 sample points

User-reprogrammable

240 x 128 pixel graphical liquid crystal display (LCD)

Electro-luminescent LCD backlight

Built-in battery charger and conditioner

Ni-Cad battery pack

RS232 interface

Battery-backed clock / calendar

Time and date stamped recordings

& &

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internal firmware

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based

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3. Standard Accessories

The

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AC/DC power transformer for battery charging

RS232 serial interface cable

Owner’s manual (incorporatin g

kit consists of the following: main unit

for temperature recording



: Windows

based

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)

4. Optional Accessories

Pt100 RTD sensor

Car adapter charger lead

Soft carry case

5. Safety Notes

Warning:

To avoid damage to the

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and electrical shock do not allow more than 10VDC between RTD sensor inputs and do not connect any probes or sensors to any live surface (voltage which exceeds 50VDC or 32VAC or the “safety extra low voltage” (SELV) defined by your local power authority).

6. Unit Start-up and Initialization

Note: Before powering up the

LQSXW PRGXOH

tightened (but do not over-tighten).

PRESS the

confirming the firmware revision number and the current (

). If the

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to power down the

PRESS the

8 function choices, in addition to LCD screen contrast adjustment. Pressing

[MENU]

from most screens returns you to the Main Menu screen.

are attached securely to it. Ensure that the screws are

[ON/OFF]

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[MENU]

button once. The Main Menu screen will appear displaying

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button. The does not recognize the

and re-secure the

LCD Screen Contrast

From the Main Me nu screen, PRESS and HOLD the

desired contrast is achieved.

To return to the default contrast setting, PRESS [SHIFT] then [RESET].

, ensure that the battery pack and

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Initialization screen appears,

LQSXW PRGXOH

[

] or [

, PRESS

installed

[ON/OFF]

] keys until the

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The LCD contrast (which varies with temperature) i s auto matically comp en sated based on the internal temperature of the rapidly changed, the automatic compensation may not ensure optimum contrast. Typically, the default contrast is optimal if the to stabilize.

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. However, if the LCD temperature is

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temperature has been allowed

HELP

Help instructions are av ai la ble at som e s cre ens by pressing

[SHIFT]

then

[HELP]

7. General Operation

Backlight

Once the

to turn the backlight on or off.

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is powered up , PRESS

[SHIFT]

then

[LIGHT]

from any scr een

If the battery level is less than 20%, turning the backlight on may cause the to turn off automatically. The backlight draws a relatively high current and may drain a nearly-flat battery quickly. To check the battery level, see Section 9.

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Power Saver

Every time the default.

With the “power saver” mode turned on, the LCD and backlight (if it is on) will automatically turn off after 8 mi nut es if no keys are pressed (although the still be functioning). If any key is then pressed, the LCD and backlight (if it was on before) will turn on again.

If the “power saver” mode is turned on, the 15 minutes if no keys are pressed.

will shut off – all

To turn the “power saver” mode off, ac cess the Main Menu screen and press

•

to access the Battery Management screen. Then p ress saver” mode off.

With the “power save r” mode turned off, the the battery voltage drops to 5.5V (after which the

Resetting the

The

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should lose control for some reason (e.g. due to electrostatic discharge exceeding 8kV), the

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keypad is read by an internal microcomputer. If the microcomputer

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on or off.

is powered up, the “power saver” mode is turned on by

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If a

recording

will not respo nd to an y k ey s and the user will n ot be abl e to turn the

functions will continue.

will shut down automatically after

is being taken, only the display

[2]

to toggle the “power

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will function continuously until

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will shut down).

will

[8]

If this situation arises the batteries from bein g run down (battery curren t is drawn continuously until the circuitry is turned off by the microcomputer). Keystrokes are ignored because the microcomputer does not execute the normal program and instead ignores all keys. Consequently, pressing the

reset

While HOLDING down the

Release the

the hardware:

[ON/OFF]

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should be reset as soon as possible to prevent the

[ON/OFF]

key and normal operation should resume.

key cannot turn off the

[ON/OFF]

key, PRESS and release the

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[RESET]

key.

8. Date and Time

From the Main Menu screen, PRESS

To edit the dat e an d ti me, PRESS the

meaning that it is in edit mode.

]

[

Pressing the

the date rapidly).

Once you have selected the desired date, PRESS the

cause the month field to flash. Again u se the

Repeat the process until you have selected and changed the date and time.

If an error is made, PRESS the

back to each field.

When you have finished, PRESS

[

key changes th e nu m eri c d at e (holding t he k ey down scrolls

[7]

[ENTER]

[MENU]

to access the Date & Time screen.

key. The d ate f iel d be gi n s to fla sh

[ENTER]

]

[

key repeatedly and the prompt will cycl e

to return to the Main Menu screen.

keys to change the month.

key. This will

9. Battery Management

The

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battery pack can be remov ed without loss of any d ata or settings because a secondary internal battery backs up the clock and memory. To minimize current drain on the internal battery, do not remove the battery pack for more than 2-3 hours.

The

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is true, it is recommended that the batteries be recharge d before a recording i s ini tiated if the remaining capacity is below 20%. If the battery voltage falls below 5.5V while the

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is powered by a rechargeable Nickel-Cadmium battery pack. The

will operate normally when the battery v olt age is abov e 6.0V. While this

is operating it will automatically shut down.

If the [ON/OFF] key is pressed and the unit does not appear to activate, it may be that the battery voltage has dropped below 5.5V. If this occurs, recharge the

battery pack (see the “Charging Battery Pack” instructions in this secti on).

Battery Check

From the Main Menu screen, PRESS key [8] to access the Battery Management

screen which displays the battery voltage and the percentage of batt ery capacity remaining.

If the battery pack has been replaced, it is necessary to dis charge and then recharge (i.e. recondition) the battery pack in order for the capacity displayed to be accurate see the “Reconditioning the Battery Pack” instructions in this section.

PRESS the [MENU] key to return to the Main Menu screen.

Charging the Battery Pack

The

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in the kit provides a DC voltage to the charger circuitry. The charger circuitry will

has built-in battery charging circuitry. The power transformer supplied

accept a 13.5 ± 1.5VDC input. When charging from a mains power outlet, use only an approved facilitates charging the system.

Note: Before using the power transformer, ensure th e v o l t ag e an d frequency of y our

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mains AC power matches that of the power transformer.

Charging with Unit Powered Down

Plug the power transformer into a standard AC power outlet.

Insert the connector of the power transformer into the charger socket on the

20

commence chargin g and th e Battery Management s cree n will be dis played.

Note: If the unit fails to power up when a charger is connected, it may be

The battery pack voltage and percent of capacity will be displayed and the

word “CHARGING” will flash indicating that battery charging is in process.

Charging will cease automatically when complete or you can PRESS the

[START/STOP] key while the Charger Control screen is displayed.

AC/DC power transf ormer. T he optional car adapter charging lead

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. If the

necessary to reset the

from a vehicle with a 12V negative chassis power

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was off, it will automatically power up and

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(see Section 7 for reset instructions).

The internal charger will fully charge the

approximately 2.5 hours.

Charging with Unit Powered Up

Plug the power transformer into a standard AC power outlet and insert the

connector of the power transf ormer into the charger socket on the

Access the Main Menu screen by pressing the [MENU] key.

PRESS key [8] to access the Battery Management screen.

PRESS key [1] to access the Charger Control screen .

PRESS key [1] to start charging the

If there is no power coming from the power transformer a flashing message

“NO CHARGER” will appear on the screen. If power is connected correctly the flashing message reads “CHARGING”.

Charging will cease automatically when complete or you can PRESS the

[START/STOP] key at any time while in the Charger Control screen.

The internal charger will fully charge the

approximately 2.5 hours.

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battery pack.

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battery pack in

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battery pack in

Reconditioning the Battery Pack

Battery pack reconditioning means putting the battery pack through a cycle of discharging and charging.

It is necessary to regularly recondition the Ni-Cad battery pack in order to reduce the “memory effect” in it.

The battery pack should be reconditioned:

when you use the

when you have just replaced the battery pack on the

at least once a month (to reduce the “memory effect”).

To recondition the and power applied. D i s char ging and /or charging can on ly be c arr ie d ou t when the

is turned on.



Note: Turning the

from charging or discharging the battery pack.

Access the Main Menu screen by pressing the

PRESS key

“DISCHARGING” will appear and flash. Once the internal charger has discharged the battery pack it automatically switches to charging.

PRESS

Note: All functions of the

[ENTER] [MENU]

charged or reconditioned.

20

[8]

to access the Battery Management screen.

[1]

to access the Charger Control screen.

[2]

to begin reconditioning the battery pack. The word

to return to the Battery Management screen.

to return to the Main Menu screen.

for the first time;

key.

; and

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battery

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battery pack the power transformer must be plugged in

off, or removing the power transformer w ill stop the uni t

[MENU]

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are usable while the battery pack is being

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Note: Battery capacity and life degrade with increased ambient temperature.

10. Measurement Setup

The

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is capable of simultaneous measurements of up to six channels of

temperature data.

WARNING

Never allow voltages of more than 10VDC between any two RTD senso r inputs. This may damage the See Application Note 1 in Appendix 3.

Plug the RTD sensor connectors into the RTD sensor sockets on the

noting carefully the polarity of the pins (see the connector diagram in Appendix 2).

Access the Main Menu screen by pressing the

PRESS key

PRESS keys

Select the RTD sensor type by pressing the arrow keys to cycle the selection

through the two supported RTD sensor types: 385 (α = 0.00385) and 392 (α =

0.00392). It is not possible to simultaneously use different RTD sensor types.

PRESS

60 Hertz as needed. This selects the appropriate filter to reject mains power interference as defined by your local power authority.

20

[1]

[SHIFT]

. It is recommended that isolated RTD sensors be used.

[MENU]

to access the Measurement Setup screen.

through

then

[6]

to toggle the selection of channels 1 to 6.

[+]

to toggle the mains frequency setting between 50 and

key.

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PRESS

This screen, hereafter referred to as the Measure Without Recording screen, allows the verification of proper setup.

[ENTER]

to begin measuring.

11. Measure Without Recording

Measure Without Recording - Screen Options

Pressing key

measuring and displaying the channels selected.

[2]

at the Main Menu screen will cause the

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to begin

To modify the parameters or display options, PRESS

access the Help screen that allows modification of parameters and options as detailed below.

Measure Without Recording

1 - Measurement Units

PRESS key

Fahrenheit. Changing the unit does not affect the data recorded. User settings are saved even when the

2 3 - Measurement Setup

4 - Display Options

[2]

- Key

PRESS key

channel selection to be changed (see Section 10).

PRESS key

the way data is displayed. Display changes do not affect the data recorded.

PRESS key

Digital

When digital is chosen each cha nnel selec ted in the M ea surem ent Setup

screen will be displayed in an alphanumeric format in the Measure Without Recording screen. Ei ther temp erature o r resistance value s can

be displayed. PRESS key between displaying (1) the present, minimum, and maximum temperature readings, and (2) the resistance between the positive and ground RTD terminals , betw een the negativ e an d gro und RTD terminals, and of the RTD element alone.

All keys displayed in the

screen.

[1]

to toggle the temperature unit between Celsius and

- No function assigned.

[3]

and the Measurement Setup screen reappears a llowing the

[4]

and the Display Options screen appears allowing changes to

[1]

to toggle the display between digital and graphic

Help

20

[5]

in the Display Options screen to toggle

[SHIFT]

screen also operate from the

is turned off.

then

[HELP]

If temperature is displayed, you can press

Measure Without Recording screen to reset the minimum and maximum values.

Graphic

When graphic is chosen, PRESS key

and a bar graph display.

Note: The X-Y option displays only a single channel of data at any given

time even when multiple channels are being recorded. Changing display options does not affect the data being recorded.

[SHIFT]

[2]

to toggle between an X-Y plot

then

[RESET]

in the

X-Y Plot

PRESS key [3] and the display option toggles between a single line

of data and a s ol id shaded ar ea in d icating sample magnitud es of th e channel being displayed.

PRESS key [4] to cycle through all selected recording channels.

Key [5] - No function assigned.

PRESS key [6] to toggle the “auto scale” function on or off. This

function causes the scale of the Y-axis on the X-Y plot to be automatically set according to the present data values.

Bar Graph

If the bar graph option is selected, each channel selected at the

Measurement Setup screen will be displayed simultaneously with constantly updated horizontal bars for each channel.

PRESS key [6] to toggle the “auto scale” function on or off.

PRESS [ENTER] to return to the Measure Without Recording

screen.

5 - New

PRESS key [5] and the New Recording screen will appear allowing the

6 - Key [6] - No function assigned. 7 - Key [7] - No function assigned. 8 - Key [8] - No function assigned. 9 - Key [9] - No function assigned. 0 - Zero Position

PRESS key [0] to cycle the placement of the zero point of the bar graph.

Adjust Scale (bar graph and X-Y plot

While holdi n g d o w n [SHIFT], PRESS either [

Scroll Y-Axis (X-Y plot display ONLY)

PRESS and HOLD either of the [

Recording

initiating of a new recording session without returning to the Main Menu screen (see Section 12 for instructions).

Choices are “left”, “right”, and “center”.

displays)

] to adjust the scale on

] or [

the bar graph, or the Y-axis scale on the X-Y plot.

] and [

Without Recording screen, to scroll the Y-Axis without affecting the scale.

] keys, while in the Measure

12. New Recording

Definitions:

Note: The standard system memory of 128 kilobytes will allow for a total of

Note: Specifying the number of samples to be recorded before beginning to record

Recording

measurement session regardless of the number of channels selected during that session. The maximum number of samples that can be collected in any recording is 9999 per channel (up to a maximum of 6 channels).

Data set

sessions). The unit will store up to 50 data sets in memory allowing for a total of 2500 recordings to be stored.

approximately 100,000 measurement data points to be stored. This number reflects the total nu mber of i ndiv i dual data points w hich can be measured an d recorded by each channel. Memory can quickly be used up if recordings of long duration and multiple channels are taken (i.e. one recording of 6 channels at 9999 sample s equal s 59 ,994 data points and approx imately 6 0% usage of memory).

will optimize memory usage.

New Recording

PRESS key

This screen allows for the measurement and recording of data w ith user -def inab le parameters entered, such as data set ID, size of recording, sampling interval, “auto size”, a n d b ee p alert settings. The following o pt ions are listed accor di n g to menu choice.

[3]

represents the data collected during a single

is a collection of up to 50 recordings (or data collection

Screen

at the Main Me n u screen to access the New Recording screen.

1 - Measurement Setup

PRESS key

the channel selection.

2 -

Data Set

Note: By default, when a new recording is initiated, the data set in whic h th e

unit selects to store the new recording is the first “empty” data set. However, any data s et can be chos en for a new recor d ing (even one th at already contains recordings) by performing the steps outlined below.

PRESS key

numbers and user-entered ID’s.

PRESS the

for the new recording. Data sets w ith n o re cording s asso cia t ed w ith th em are tagged “available”. Any of the 50 data sets can be selected.

Once the desired data set is highlighted, PRESS

[1]

to access the M easurement Setup screen to verify or chang e

Number

(assign data set number for storing the new recording)

[2]

and a complete list of data sets are displayed with their

]

[

keys to highlight the specific data set you wish to use

[ENTER]

to select it.

3 -

Data Set

Note: Different

this is best avoided to prevent confusion.

PRESS key [3] to access the Edit Name screen.

To Enter a New ID

PRESS [SHIFT] then [RE SET] to clear the ID field of all characters to the

right of the underlined character, if necessary.

PRESS [

characters. Numeric characters can be entered using the digit keys. Repeated presses of the digit keys enter the alphabetic characters shown on top of the digit keys. Pressing [0] or [1] twice enters a space character. To toggle a character from upper case to lower case, press

], and to toggle it otherwise, press [

[

[SHIFT] then [-], and to insert a character before it, pr ess [SHIFT] then [+]. Up to 16 characters can be entered for each ID.

PRESS [ENTER] to move forward or [SHIFT] then [BACK] to move

backward through the other ID characters and edit them.

PRESS [MENU] to save the new ID and return to the New Recordi ng

screen or press [START/STOP] to qu it t he edit process and return t o the New Recording screen with the ID remaining unchanged.

To Enter a Previously Used ID

PRESS [SHIFT] then [NEXT] for a list of the 10 most recently used ID s.

PRESS [

[ENTER] to confirm the selection. The ID may now be edited.

data sets

] or [

can share the same user-entered ID, however

] to cycle the under lin ed character through all alp hab eti c

]. To delete the character, press

] to highlight the ID you wish to use and then PRESS

PRESS [MENU] to save the new ID and return to the New Recordi ng

screen or press [START/STOP] to q uit t he e dit process and return to the New Recording screen with the ID remaining unchanged.

4 - Size (number of samples)

PRESS key [4] to enter the number of samples to record. The number of

samples previously stored for that data set will be displayed. If the number of samples has not been previously set, a “? samples” message is displayed.

Type in the number of samples (up to 9999). If an entry error is made, press

the [0] key repeatedly until the “?” appears again.

PRESS [ENTER] when finished to return to the New Recording screen.

Note: If the number of samples is set, the recording will automatically be

terminated when that number of samples is collected. If the number of samples is not set (i.e. left as “? samples”) then the recording must be terminated manually, otherwise 9999 samples will be recorded.

5 -

Recording

PRESS key [5] and then press the [

number to assign to this recording. A number for a recording with data already stored cannot be chosen. To overwrite a previously stored recording the recording must first be erased (see Section 14 for instructions on erasing recordings).

6 - Sampling Interval

PRESS key [6] to access the Sampling Interval screen.

PRESS the [

seconds, minutes, or hours.

Type with the keypad the desired sampling interval. Milliseconds must be

entered in increments of 100. Please refer to the specification sheet (Appendix 1) regarding limitations on sampling intervals.

PRESS [ENTER] when finished, to return to the New Recording screen.

Number

] or [

] keys to select the appropriate

] or [

] keys to cycle through interval ranges: milliseconds,

7 -

Recording Options

Press key [7] to access the Recording Options screen.

Press key [1] to toggle “auto size” on or off. If the recording is manually

stopped while “auto size” is turned on, the sample size of the recording will be stored and re-used for the next recording.

Press key [2] to toggle the “sample beep” on or off. This provides an audible

alert when each sample is taken.

Note: While recordings are tak e n, th e sample beeper may be t u rned on or of f

by pressing key [2].

Press [ENTER] when finished, to return to the New Recording screen.

8 - Measure Without Recording

PRESS key [8] to access the Measure Without Recording screen to verify

proper settings, as necessary (see Section 11). PRESS key [5] to return to the New Recording screen.

9 - Display Options

PRESS key [9] to access the Display Options screen to verify proper display

settings, as necessary.

Note: Display options may b e c hange d from the Help screen while a recording

is being taken (see Section 11).

Screen

Start Recording

PRESS

[START/STOP]

once to begin taking the recording.

Stop Recording

The recording will automatically terminate once the preset number of samples has been recorded. If no number was entered in the “size” setting, the measurement must be halted manually, otherwise 9999 samples will be recorded.

To manually stop a recording, whether or not the number of samples has been preset:

PRESS

further samples will be taken.

[START/STOP]

at the moment you wish the recording to stop, and no

Return to Main Men u Screen

PRESS

screen.

[MENU]

to exit the New Recording screen and to r eturn to t he Main Menu

13. Review Data Set

You can review the recordings that are stored in the

20

Review Data Set Screen

Data Set

[4]

from the Main Menu screen to access the Select Data Set screen

]

[

[ENTER]

keys to highlight the data set you wish to review.

key to select the highlighted data set.

[2]

to access the Edit Name screen from where you may ed it th e

PRESS key

(which displays the ID’s of all data sets stored in memory).

PRESS the

Reselect

If you wish to change your selection, PRESS key

Data Set screen which allows you to change the selection.

Edit

To edit and replace the ID of the data set that you are currently reviewing

PRESS key data set ID (see Section 12 for ID editing instructions).

[1]

to return to the Select

Select

Recording

PRESS key

recording is identified by a recording number (ranging from 1 to 50) and a time and date stamp.

PRESS the

PRESS

[3]

to select from the data set, the recording to be reviewed. E ach

]

[

[ENTER]

keys to highlight the recording you wish to review.

to select the highlighted recording.

Display Options

PRESS key [4] to access the Display Options screen and configure the

display options for the visual review of the data. The option settings used for the last recording are the default settings. For instructions on how to

configure display options, see Section 11. Note: It is not possible to turn on “auto scale” when reviewing data. Transfer Data (optional)

PRESS key [5] to access the Transfer Data Set screen. This screen allows

the transferring of data to a PC that has

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Start At Option

PRESS key [6] to select a specific sample to start reviewing from. This

feature is useful in avoiding having to scroll through a large number of

samples in order to look at a sample in the middle of a long recording.

After typing in the desired sample number, PRESS [ENTER] to continue. If

the number typed is larger than the recording size a “?” will be dis p l a y e d and

the

20

) installed and running (see Section 19).

will beep, prompting for another entry.

20 0$6 (0HDVXUHPHQW

Start Reviewing Data

PRESS the [START/STOP] key to begin reviewing the data.

PRESS the [ENTER] key to scroll through the data. Each press of the [ENTER]

key scrolls the data one sample. Holding the [ENTER] key down will scroll the data progressively faster.

Once the final sample in the recording is reached the internal beeper sounds and the display stops. To restart, PRESS the [START/STOP] key twice.

During review, if the scale fac tor i s to o la rge or s mal l, PRESS [SHIFT] a nd then the [

] keys to either increase or decrease the scale of the display. This feature is

or [

useful if there are very small variations in the recorded data that you wish to review. This feature can also be used while taking a recording.

If digital display was selected, the minimum and maximum values are updated as the data is reviewed. If the “start at” option was selected, the data prior to t he start sample is not included in determining the minimum and maximum.

Stop Reviewing Data

To stop reviewing data, PRESS the [START/STOP] key. The Review Data Set

screen will be displayed.

Return To

To return to the Main Menu screen, PRESS the [MENU] key.

Main Menu

screen

]

14. Memory Management

You can find out the percentage of memory currently used on the also erase (permanently) recordings and data sets, or simultaneously erase (permanently) all data sets from the memory.

20

. You can

Displaying Memory Usage

From the Main Menu screen, PRESS key

screen. The screen dis plays the number of data sets (if any) in memory and the memory size. The memory currently used is displayed as a percentage of the total available. If memory usage reaches 99%, some data will need to be erased before further recordings can be taken.

PRESS

Erase Individual

From the Main Menu screen, PRESS key

screen.

PRESS key

recording most recently stored in memory will be the selected data set.

PRESS key

PRESS the

to be erased.

PRESS

PRESS key

ID of the selected data set and a list of all the recordings in the data set. Each recording is identified by a recording number and a date and time stamp.

[MENU]

to return to the Main Menu screen.

Recordings

[1]

to access the Erase Data screen. By d efau lt, t he da ta set with th e

[1]

to view a list of all data sets in memo ry.

]

[

[ENTER]

[2]

keys to highlight the data set which contains the recording

to select the data set and to return to the Erase Data screen.

to access the Erase Recording screen. The screen displays the

[6]

to access the Memory Management

[6]

to access the Memory Management

Note: If the data set displayed is not the one required, PRESS the

return to the previous screen.

]

[

PRESS the

PRESS

The recording has now been erased from memory.

Note: Once the recording has been erased the next recording ( if a ny ) is high lighted.

PRESS

[

[SHIFT]

[ENTER] [ENTER] [MENU]

keys to highlight the individual recording to be erased.

[RESET]

and

to return to the Erase Data screen.

again to return to the Memory Management screen.

to return to the Main Menu screen.

simultaneously to erase the highlighted recording.

[MENU]

key to

Erase Entire Data Set (ALL Recordings in ONE Data Set)

From the Main Menu screen, PRESS key

screen.

[6]

to access the Memory Management

PRESS key

recording most recently stored in memory will be the selected data set.

PRESS key

PRESS the

PRESS

The data set has now been erased from memory.

PRESS

[1]

to access the Erase Data screen. By d efau lt, t he da ta set with th e

[1]

to view a list of all data sets in memory.

]

[

[SHIFT]

[ENTER] [ENTER] [MENU]

keys to highlight the data set to be erased.

[RESET]

and

to return to the Erase Data screen.

again to return to the Memory Management screen.

to return to the Main Menu screen.

simultaneously to erase the highlighted data set.

Erase ENTIRE Memory (ALL Recordings in ALL Data Sets)

From the Main Menu screen, PRESS key

screen.

PRESS key

PRESS

sure?” to make sure that you really intend to erase all data in memory.

PRESS

data

[1]

[SHIFT]

in memory.

to access the Erase Data screen.

[RESET]

and

[RESET]

simultaneously and you will be asked “Are you

simultaneously again to

[6]

to access the Memory Management

permanently erase all

The requirement to PRESS two separate keys simultaneously is designed to prevent accidental erasure of valuable data.

screen will display “No data sets” in memory confirming that the erasure has been completed.

When all data has been erased, the

15. Troubleshooting

SYMPTOM PROBABLE CAUSE REMEDY

Will not start when key is pressed

Turns off when backlight turned on

“

Low Battery”

“

Module Fault

Will not transfer, “ displayed

“

Insufficient Memory

displayed

“

Memory Full

“

Memory Partition Full

displayed

“

Memory Error

“

No Sensor”

[ON]

displayed Battery capacity is low Charge battery pack

” displayed

No PC?

”

” displayed No compatible

” displayed Battery failure during

displayed RTD sensor not conn ected to select ed

Low/dead battery Electrostatic discharge e xceedi ng 8k V

Low/dead battery Charge battery pack

,QSXW PRGXOH

”

Serial cable not properl y sec ure d Unit and cable connected to wrong port

Insufficient memory left for the

recording

”

The current memory partition and requires ano ther partition to continue (a be stored in more than one partition)

Backup battery flat

channel

loose damaged

data sets

recording

left for

has filled a

recording

cannot

Charge battery pack Reset

20

Tighten Send in for servicing

Check cable connections Test COM port function with

20 0$6

Erase unwanted and/or reduce sample size

Erase obsolete

Transfer all data and erase all data from memory

Charge battery pack Connect RTD sensor to selected

channel

recordings

Locks up when touched Electrostatic discharge exceeding 8k V

Data lost when battery pack replaced

Low/dead backup battery Send in for servicing

In the PC-based analysis software that comes in the kit ( provision for generating error report files that help diagnose and solve problems related to your

In the

20 0$6

Main window, click on [Tools] and then on [OM-3000

20

Reset

20 0$6

20(*$

20

), there is a

engineers to quickly

Diagnostics], and follow the instructions o utl ine d in the O M-3000 Diagnostics w indow.

16. ANALYSIS SOFTWARE

Recordings made on your instrument can be transferred to the on a Windows be used to store, graph, analyse, print & export your recordings.

It is assumed that the user of Please refer to the appropriate literature on Windows mouse and keyboard commands.

Note

WARNING



based PC.

Throughout

topic-specific Help screen. Also, clicking the right mouse button anywhere in

0$6

: Read section 1.4 before operating your instrument .

0$6

will bring up a pop-up menu of the applicable commands.

stands for Measurement Analysis Software.

0$6

is already familiar with basic Windows

0$6

, pressing F1 on your keyboard will bring up a comprehensive



if clarification is needed on

software running

0$6



commands.

0$6

can

17. INSTRUCTIONS

Warnings

In this manual, the word damaging consequences. Please heed all such warnings.

Names

In this manual, window and screen names are italicized. These names refer to the names appearing at the top of windows/screens.

WARNING

is displayed where certain actions may lead to

Window

0$6

The PC key names are shown as normal text, e.g. Shift refers to the Shift key on the PC keyboard.

Keys on the instrument are shown as they appear on the instrument keypad, e.g. refers to the Shift key on the instrument.

Some instrument keys have more than one function, e.g. the key which is used as either t he ON key or the OFF key depending on the state the instrument is operating in.

Instruction Sequences

The

symbol is used to indicate the sequence of menu selections.



Instruction Meaning

Click File  Save. Select the File menu and then

select Save.

Instruction Types

The word “press” refers to key presses or menu selections on the instrument. The word “click” refers to menu selections o n the PC, and “push” refers to key presses

on the PC keyboard.

Instruction Meaning

Click File  Export.

Push the Esc key.

Some operating instructions are illustrated with examples. Such instructions are marked with the word EXAMPLE.

Select File and then Export in

 0$6

Push the Esc key on the PC keyboard.

software.

20

18. INSTALLING

$

License Agreement

Please read the license and warranty agreement printed on the CD cover found in the jewel case that the and for installation on one computer. The software contained on the CD-Rom remains the intellectual property of OMEGA Engineering who retain the title and ownership of the software.

CD-Rom was supplied in.

0$6

is licensed for individual use

0$6

PC System Requirements

The following are the minimum system requirements for installing

Pentium processor or better

•

32MB RAM (64MB recommended)

•

10MB hard disk space

•

CD-Rom drive

•



Windows

•

Windows

•

Windows

•

95, 98, Me, NT or 2000 operating system



compatible display and printer



compatible mouse or other pointing device

0$6

Unsused PC COM port for communication with the instrument

•

Installing

Close all programs on your PC.

•

Insert the

•

Wait for the

•

Follow the instructions given to complete the installation.

•

0$6

on PC

CD-Rom into the CD-Rom drive.

0$6

Installation program to automatically start (or run Setup.exe

0$6

located on the CD-Rom). OR Run the

Setup.exe program located on the CD-Rom.

0$6

19. STARTING UP

$

Starting up

Click Start  Programs  OM-3000 MAS  OM-3000 MAS 5.00

•

Configuring PC COM port

To allow data transfer between the instrument and the PC, you must firs t co nfigure

•

your PC COM port as follows:

Connect the instrument to one of the COM ports using the d ata-trans fer cable and

•

power up the instrument .

Click Tools menu Configure COM port.

•

Select the COM port that the instrument is connected to.

•

Select a baud rate. The baud rate is the speed (in bits/second) at which data is

•

transferred. The lower the baud rate, the less likely are data-transfer errors. Automatic is the default choice as it is sufficient for normal transfers.

Click Test port

•

Click Yes in the Confirm window to test the connection. Co nne ctio n fa ilure may be

•

due to the selection of the wrong COM port in powered up, connectors being not plugged in properly, or the PC serial port being not set up properly. If the connection is good, continue as follows:

Click OK in the second confirm window to acknowledge that the instrument is

•

attached to the COM port.

, the instrument being not

0$6

Click OK to leave the

•

Configuration window.

0$6

20. TRANSFERRING DATA TO THE PC

Data transferred to the PC is stored in extension. To transfer data from the instrument to the PC:

Check the instrument battery cap acity and if it is less than 30%, c harge the battery

•

pack.

Connect the RS232 port of the instrument to the configured PC COM port using

•

the data-transfer cable.

On the instrument , press File menu Examine Files… Use the arrow keys to

•

select the indiv i d ua l rec ording or folder to be transfe re d. If a folder is highlighted, all recordings within the folder will be transferred.

On the PC, click the Receive button. If you have a

•

data about to be transferred will be appended to the open file. If no files are open, the data will be transferred into a new file.

On the instrument press

•

data will appear in the current file in appear in a new file.

To append more data from the instrument to the current data folder, click Receive

•

button.

To save the data transfe rre d to the current data folder, c l i ck th e Sa ve bu tt on, nam e

•

the file and click Save to save the file. If the file was an already existing file, clicking the Save button will automatically save the file under the same name and in the same location on the PC.

SndToPC. Once the data-transfer is complete, the

files. These are text files and have t he .d as

0$6

20 0$6

or if no files were open, the data will

0$6

file open, the

21. MANAGING DATA

Opening a File

Click Open button and select the file.

•

Merging Two Files

Open one of the files.

•

Click File menu Import & Merge a file… and select the other file to be merged

•

into the open file.

The merged data can be viewed but is not automatically saved on the computer. To save it, click File men u Save or File  Save As.

Using the Navigator

When a file is open, the navigator that consists of two boxes is displayed on the left side of the screen. The top box shows all the folders in the file. The bottom box shows all the recordings in the selected (highlighted) folder in the top box.

Deleting Data from a Folder

Select the folder in the Folder section of the navigator.

•

Using the navigator, select the ind ivi d ual rec ordi ngs and/ or cha nnel s to be dele ted.

•

Click File  Delete, or press the Delete key. You will then be prompted to confirm

•

that you wish to delete the selected recordings/channels

Editing Recording Details

Select the folder, and then the recordings and/or channels to be edited.

•

Click the Info tab to access the Inf o p age where you can edit the User Details (eg.

•

Company Name, instrument serial num be r…), Folder Name, and the Recording Details (eg. recording name, remarks, channel labels and units…).

From the Edit User Details screen there is access to edit the Default User Details.

•

These values are written to all future recordings, while they are transferred from the instrument .

Viewing and Printing Data

Open the file and using the navigator, select the recordings and/or channels to be

•

viewed and/or printed.

Click the Values tab. The data in the se l ect ed recordings and/or channels can now

•

be viewed.

To change the value in a cell, click the cell and type in the new value.

•

To reduce the amount of data by averaging, click the Average button.

•

To print the data, click the Print button.

•

To copy the values to a spreadsh e et pr ogra m, cli c k the Copy (to clipboard) but ton,

•

go to the Spreadsheet program and use its' "Paste" command.

†

To print a report on the data, click File  Summary Report

•

or Full Report ‡ and select the print option in the Data Su mmary or Report Generator window that appears.

Exporting data

In the Navigator select the folders or recordings to be exported as a .

•

Click File  Export and select the option required.

•

Provide the name and location of the export file to be produced and then click the

•

Save button.

0$6

file.

† The Summary report produces a data summary about the selected recordings/channels. For more information consult the ‡ The Full report produces an exact printout of the pages selected in the report generator window. For more information consult the

0$6

help file.

0$6

help file.

22. CALCULATING DATA

You can perform calculations on your recorded data by creating new "calculated" channels:

Open the file and using the navigator, select the recordings and/or channels to be

•

used in calculations.

Click the Values tab to display the data and click the Calculate button to access

•

the Calculate window.

Each channel is automatically given a "

•

channel. It is a letter of the alphabet that can be used to reference the values of a recording for use in calculations.

Expressions can then be derived using the provided functions and the channel

•

Constants can also be used in calculations. You may need to use constants in

•

To find the "difference from the mean value" for a particular channel, say the channel represented by "

tags

eg. TempChange = ChangePerHr(B) with units degC/hr

This example will create a channel called "TempChange" which is calculated as the rate of change per hour of the channel which has tag 'B'.

your expressions, for example:

tag

" 'D'.

A constant should be defined to provide the mean value of channel 'D',

"K0 = Mean(D)"

This constant is then used in the expression, "DiffFromMean = D – K0"

tag

" character that is used to identify the

See appendix 4 for a complete list of functions available.

23. PLOTTING DATA

Plotting Single and Individual Charts

Open the file and using the navigator, select the recordings and/or channels to

•

be plotted.

Select the Chart tab and click the Plot button. You can also plot a recording or

•

channel by double-clicking it in the navigator.

To display the selected recordings and/or channels on individual charts, click

•

the Individual button.

To change the format of charts, click the Adjust button to access the Adjust

•

Axes & Colors window. This window allows for changes to be made to the axes and colors of the plotted recordings displayed on the chart.

To clear all plotted recordings, click Chart menu  Clear Chart. To retain

•

existing plots when adding to the chart, click the Hold button. A maximum of 16 plots can be displayed at a time

To enlarge a chart, you can hide the legend by clicking Chart menu  Show

Legend. You can also Hide the navigator by clicking Window menu  Show Navigator.

24. Zooming & Panning

To zoom in on any part of a chart:

Click a point to the left of that part of the chart and drag a rectangle across and

•

down to the right over the section to be enlarged (while holding down the left mouse button). Release the mouse button to perform the zoom.

To zoom in horizontally:

Proceed as above, but only move the mouse directly up or down to select the area

•

to be enlarged. Two horizontal lines will be displayed across the chart to indicate the selection.

To zoom in vertically:

Proceed as above, but only move the mouse directly left or right t o s ele ct the area

•

to be enlarged. Two vertical lines will be displayed across the chart to indicate the selection.

To unzoom from any view:

Left click on any point in the chart and drag a recta ng le u p and to the left to display

•

a rectangle with a cross in it. When the mouse button is released all zooming will be undone and the chart will be returned to its original view.

Panning

The chart displayed can be dragged in any direction to display sections that are

•

hidden from the current view. To pan around the chart click and hold down the right mouse button in the chart display. The cursor will turn into a pointing hand icon. Drag the mouse pointer in the direction that you wish to move the chart.

Note:

If you move the cursor off the chart, you will have to release the right mouse button and return it to wi thin the chart boundaries to continue panning.

25. Printing Charts

Click Print while the chart is displayed.

•

26. Reading and Comparing Values

To place cursors on charts to read the data values on curves:

Plot the recordings and/or channels on a single chart.

•

To place a cursor at a particular point on a curve, place the mouse cursor at that

•

point, follow the curve until a crosshair appears, and then click the left mouse button. If the default cursor options are used, the cursor comprises a horizontal and a vertical dashed line, and the values indicated by the cursor are displayed at the edge of the chart next to the dashed lines.

To move the cursor to a different point on the same curve, press the horizontal

•

arrow keys. To move in small steps, hold down the Ctrl key when pressing the horizontal arrow keys. You can also move the cursor by clicking the left mouse button on the new point (first allowing a crosshair to appear).

To move the cursor to a different curv e, push the vertical arrow keys. Alternat iv ely ,

•

click the left mouse button on the new curve, or on the appropriate symbol on the legend.

To place a second cursor on the chart, place the mouse cursor at the point of

•

interest, follow the curve until a crosshair appears, and then click the right mouse button. If the default cursor options are used, the difference between the values indicated by the cursors is shown at the top right corner of the chart. Cursor A corresponds to left mouse button and cursor B to the right.

To toggle the focus between the cursors, push the space bar - a cursor must be

•

focused before it can be moved using the arrow keys. A cursor is focused if it has a rectangular target.

To clear the cursors, push the Esc key.

•

To change cursor options, click Chart menu  Cursor Options....

•

EXAMPLE: a two-channelled temperature recording with both cursors displayed (us ing the default cursor options).

Each cursor display s t he x and y axis values and the difference in b oth the x and y axis values of the two cursors in the top right hand side of the chart.

27. Plotting Waterfall Charts

Plot the recordings and/or channels on a single chart.

•

Click Chart menu  Waterfall Chart and select the dept h required .

•

Waterfall charts are useful for trending data behaviour. As on ordinary charts, cursor and zooming functions can be used on waterfall charts.

EXAMPLE

data pertaining to the same measure men t point. It can be s een that the pea k valu e has a rising trend.

: the four curves on the waterfall chart below correspond to three sets of

28. UPGRADING FIRMWARE

When an upgraded instrument firmware version is available, it will be posted on the OMEGA website. Once you have obtained the firmware file, the firmware can be upgraded using the Reprogramming procedure below.

WARNING

Check the instrument battery capacity and if it is less than 30% charge the battery

•

Connect the RS232 port of the instrument to the configured PC COM port using

•

Power up the instrument and transfer any data you wish to keep to

•

Click Select Drive to Search and se lect the drive wher e t h e n ew firmware versio n

•

Click Start Search, and when the search i s completed select the new firmware file .

•

: Upgrading the firmware erases all data in the instrument.

pack.

the data-transfer cable.

click Tools menu Reprogram OM-3000. In the Reprogram window click

0$6

the Reprogram button Automatic search.

is located.

0$6

on a PC.

Click Start Reprogram using this file.

•

Once the reprogramming is complete, the instrument will beep and the Initialisation screen will appear. If an error occurs, check that the data-transfer cable has been connected properly and that the instrument is powered up.

29. Appendix 1 Specifications

Model:

Specifications

Incorporating 6 RTD Channels (3-Wire)

20

Remarks

Temperature Range

Temperature Resolution

Temperature Accuracy

Minimum Sampling Interval

Data Logging

Data Storage Format

Data Storage

Data Set

Name

Display

Firmware Upgrade

Communications

RTD Inputs

Sensor Excitation Current

Battery

Charger & Conditioner

Mechanical

Environmental

Resolution

Viewing Area

Backlight

Baud Rate

Connector

Type

Voltage

Capacity

Operating Time

Fast Charge Rate

Discharge Rate

Size

Weight

Temperature/Humidity

Operating

Storage

EMC

-328 to +1562°F (-200 to +850°C) Operating temperature range is determined by operating range

0.1°F or °C

±0.1% of reading ±0.2°F (0.1°C)

Number of channels selected Minimum sampling interval (user-selectable)

1 2 3 4 5 6

Up to 50 named Up to 50 Up to 9,999 samples per 128 kilobytes – approximately 100,000 individual samples

Up to 16 alphanumeric characters

LCD with graphic capabilities 240 x 128 pixels

4.3" x 2.3" (110mm x 60mm) Electro-luminescent

Via built-in serial port RS232

9600, 19200, 57600 bits per second

Sockets accept MTP miniature 3-blade RTD plug 350 – 420µA (nominal 380µA) Current switched between selected channels.

Custom Nickel-Cadmium pack

7.2V nominal 1500mAh nominal 13 hours nominal with backlight off, 7 hours nominal with backlight on

Built-in dual rate charger – automatic and manual control

0.7A nominal

0.5A nominal

9.7" W x 6.1" L x 3.0" H (247mm x 154mm x 75mm)

4.4lb (2kg)

32°F to 122°F (0°C to 50°C) / 80% RH 32°F to 86°F 70% RH 32°F to 122°F 14°F to 140°F (-10°C to 60°C) / 95% RH EN50081-1 EN50082-1

data sets

recordings

data set

per

recording

The manufacturer reserves the right to modify specifications (Rev. OM 1.06)

(seconds)

0.2

0.3

0.5

0.6

0.7

0.8

of Pt100 RTD sensor.

20

The resistance table given in DIN43760 (α = 0.00385; α = 0.00392 also supported). Temperature measurement accuracy depends on given here.

Minimum time to scan all Sampling interval is programmable from 0.2 seconds to 60 hours.

User-specified name entered from keypad. Each Each sample contains data for all selected channels. Non-volatile memory (battery backup). Number of samples depends on number of

15kV ESD protected. Cable with DB9 connector included. Automatic baud rate selection.

Power transformer (13.5 ± 1.5VDC, 1A output) included in kit.

2.5 hours for complete charge nominal. Combats Ni-Cad battery memory effect.

Including protective boot. Including protective boot and strap.

Non-condensing. Non-condensing.

Radiated and conducted emissions. ESD immunity and RF field immunity (EMI).

is calibrated to the standard RTD temperature vs.

20

and RTD accuracy. Only

selected channels - not each channel.

recording

has unique time/date stamp.

data sets

and

recordings

20

accuracy is

30. Appendix 2 57',QSXW0RGXOH Connector Diagram

RTD Channels 1, 2, 3, 4, 5, and 6.

3W :LUH 57'

3-Wire RTD Sensor Connection Diagram

MTP

Connector

Wide

Blade

Ground +

Platinum

Resistor Element

(100

at 0°C)

Ω

Red Black Black

(Typical Wire Colors)

Notes:

1. The two black wires are identical and interchangeable.

2. When using RTD elements it is important to keep the resistance of all wires from the element to the MTP connector equal. Any variation will show up as a temperature error of approximately 2.6°C/Ohm (4.7°F/Ohm).

3. Lead resistance should be kept as low as possible with a maximum of 10 Ohms per wire. Lead resistance above 10 Ohms will reduce the maximum possible reading.

31. Appendix 3 Application Notes

Application Note 1

57' ,QSXW 0RGXOH

The six channels of the is switched into one RTD channel at a time and the voltages across that RTD channel are switched into the A/D converter so that resistance can be calculated.

The input processing circuitry has a nominal 500VDC electrical isolation from the

data processing circuitry including the battery and serial cable to the computer.



The six channels are not isolated from each other, however most RTD sensors are electrically isolated i.e. the internal platinum resistor is electrically isolated from any external metal sheath.

Operation and Voltage Isolation

57' LQSXW PRGXOH

are multiplexed i.e. the excitation current

20

WARNING: Connecting non-isolated RTD elements onto surfaces of

different voltages will cause incorrect readings, and may cause damage to the

57' LQSXW PRGXOH

circuitry. It is recommended that isolated RTD sensors be used. Check the RTD manufacturer’s isolation specification before connecting a sensor to any surface.

WARNING: Connecting any probe to a “live” surface may cause

electric shock to the operator and/or damage to the



(see Section 5).

20

Application Note 2

Shiel

MTP

Connect

orRTDSens

orGroun

Use of RTD Sensors in Electrically Noisy Environments

In an industrial environment, it is common to have AC and/or DC voltages between conductive surfaces that are not bonded to gether. Conductors that are assumed t o be isolated may in fact have a DC leakage, a 50Hz/60Hz AC voltage from inductive or capacitive coupling, or a continual presence or bursts of r.f. voltage.

Where sensors are being used in such an electrically noisy environment, it is recommended that leads be kept as far as possible from noi se source s s uch as power cabling, switch gear, electric motors, and radio antennae.

(a) Use of Cable Shielding

A standard precaution for signal wiring in noisy environments is to use shielded cable, with the shielding extending from the sensor to the instrument (i.e. the MTP connector) and grounded at one point at the instrument end.

Note that the ground terminal (G) on the MTP connector connects to the isolated “common” supply of the ground. If the shielding of each lead was connected to the ground terminal of th e MTP connector, then one such terminal would also need to be connected to a true ground. In this case however, the RTD elements are no longer iso late d fro m ground. Care must be taken to avoid “ground loops” i.e. grounding the cable at both ends, or having the shield contact ground in an intermedi ate position.

The above is effective where the noise is mainly electric field i.e. capacitively coupled. Braided copper wire, or metalized plastic sheath may be used for shielding. Where the noise is due to the presence of very large currents (i.e. inductively coupled) the shield needs to be iron conduit, and both ends should be tied to ground.

57' LQSXW PRGXOH

, but this is isolated from true

(b) Use of Non-Isolated RTD Sensors

In an industrial environment, it is recommended that any metal surface to whic h the non-isolated RTD sensor is connected, be grounded.

Example:

Connecting non-isolated RTD sensors to conductive surfaces in a

noisy environment where shieldi ng is not use d.

RTD Sensor 2

Metal Surface

Ground

RTD Sensor 1

Metal Surface

Ground

3W :LUH 57'

WARNING: It is however not recommended that non-isolated

sensors be connected to conductive surfaces or inserted in conductive fluids.

Application Note 3

Environment Issues and Care of Connectors

Although the RT D con nectors in the standard connector for RTD sensors has unplated copper contacts.

Oxidation and corrosion of contacts will cause measurement errors. It is recommended therefore that the instrument and sensors be stored in a dry, noncorrosive atmosphere.

Where sensors are left in a corrosive atmosphere, it is recommended that the connector contacts be inspected before use. The copper contacts can be cleaned by lightly rubbing with a very fine emery paper. If the contacts show signs of corrosion, and need to be cleaned, it is recommended that the screw termination of the wire to the connector (underneath the plastic cover) be also inspected and cleaned as necessary.

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are nickel-plated, the industry

32. Appendix 4

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MATH

The following are the mathematical functions and operators that can be used in

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The symbols A,B,C,… represent channel tags; and L1, L2, …, Ln represent logical expressions (e.g. int(A) > 3).

The notation used for functions and operators is similar to that used in common computer-programming languages and spreadsheet programs.

calculations.

20

FUNCTIONS Mathematical Functions

Function Meaning

Abs(A) Absolute value Cos(A) Cosine Deg(A) Convert from radians to degrees DegC_to_DegF(A) Converts Celsius to Fahrenheit DegF_to_DegC(A) Converts Fahrenheit to Celsius Exp1 Base of natural logarithm, e (constant) Exp(A) Exponent Frac(A) Fractional part Int(A) Integer part Ln(A) Natural logarithm Log(A) Base 10 logarithm Max(A, B, … ) Return the maximum value Min(A, B, … ) Return the minimum value N Sample number (starting from zero) Pi Power(base, power) base to the power of power e.g.

Rad(A) Convert from degrees to radians Round(A) Rounded value Sgn(A) Sign (-1 if negative; +1 if positive; 0 if zero) Sin(A) Sine

(constant)

Pow(A,3) gives A Pow(3,k1) Pow(A,B)

Function Meaning

Sqr(A) Square Sqrt(A) Square root Tan(A) Tangent ChangePerDay(A) ChangePerHrs(A) ChangePerMin ChangePerSec SumOverDays SumOverHrs SumOverMins SumOverSecs

Rate of change (differentiation) e.g. If channel ‘A’ chang es smoothly from 10 to 25

over a 1 min ute p e r io d , t hen ChangePerMin(A) will be 15 over that period.

Summation over time (integration) e.g. If channel ‘A’ is a 2hr recording with all value s

= 3.5, then SumOverHrs(A) changes smoothly from 0 to 7 over the recording.

Iterative Functions

The following iterative functions can be used for constants only. Cell level expressions cannot contain iterative functions.

Function Meaning

Count(A) Number of samples Maxsample(A) Maximum sample value Mean(A) Mean Minsample(A) Minimum sample value Stddev(A) Standard deviation Sum(A) Sum

Logical Functions

Function Meaning

AND(L1, L2, …, Ln) Logical AND e.g.

AND(n = 10, k2 > 0.5, k3 > 0.5, k2 <> k3) False Logical constant, has value 0 OR(L1, L2, …, Ln) Logical OR e.g.

OR(k0 = True, k1 < 3, n >= 30) True Logical constant, has va lue 1 AOR(L1, L2, …, Ln) Logical AOR (exclusive OR) e.g.

AOR(k0 = True, k1 < 3, n >= 30) NOT(L1, L2, …, Ln) Logical NOT e.g.

NOT(k1 =True, k2< 10, n>30)

Conditional Functions

Function Meaning

IF(L1, true result, false result)

If logical expression L1 is true, execute true result, otherwise execute false result e.g.

IF(k2 > k3, k2*A, k3*A) IF(k0 = True, n, n*2) IF(n < 10, n, Log(n))

Date and Time Functions

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number. The integer part of the number represents the date: it is the number of days since the first day of 1 AD. The fractional part of the number represents the time: it is the proportion of time that has passed since the beginning of the day.

Function Meaning

Date(year, month, day)

Time(hour, minute, second, ms)

Elapsed(sample number)

SampleDate(n) Date of the nth sample SampleTime(n) Time of the nth sample

, the date and time value of when a sample is taken is a floating-point

Return the date in format e.g.

Date(1999, 07, 25) Return the time in

format e.g. Time(16, 59, 31, 965) Return the date and time of the

sample in DAT(36)

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format e.g.

OPERATORS Logical Operators

Operator Meaning

< Less than <= Less than or equal to <> Not equal to = Equal to >= Greater than or equal to > Greater than

Arithmetic Operators

Operator Meaning

+Addition – Subtraction / Division * Multiplication

The order of precedence is as in standard arithmetic (i.e. /, *, +, –). An operand between two operators of different precedence is bound to the operator with higher precedence. An operand between two equal operators is bound to the one on its left. Expressions within parentheses are evaluated before being treated as a single operand.

Omega Products OM-3002 Installation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual