Omega OM-60-PP User guide

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Dual Pressure Adapter

OM-60-PP SERVICE LOGGER

TWO PRESSURE SENSORS

WITH

The OM-60-PP is a Service Logger with two p r essu re sen so rs. The sensors are available as part # OM-60-MOD-PP. The OM-60-MOD-PP option consists of two pressure sensors, an interface box, and cable which connects to the Service Logger. The OM-60-PP allows for two simultainious pressure measurements.

Each pressure sensor is permanently connected to the interface box with a 6 foot cable. The maximum pressu re allowed for each pressure sensor is 500 PSI (35 BAR). The pressure sensors are co mp a ti ble with any gas or liqui d th a t i s compatible with 17-4 stainless steel and is well suited for HVAC applications.

Cutting or splicing of the OM-60-MOD-PP cable by the user is not recommended and will void th e s ensor warranty.

GETTING STARTED

Plug the interface cable into the Service Logger and the interface box. Note that the interface box is labeled to indicate which pressure sensor is PRES1 and PRES2. If portable use or battery backup is desired, place a fresh 9 Volt alkaline battery into the unit. Any other type of battery will result in unsatisfactory performance and may cause damage to the instrument. Plug in the power adapter if a 110 (220)Volt outlet is accessib l e.

Press the "ON" button on the front panel. The display will show the instrument name. If no display is visible, or if the display is all black, adjust the display control until the lettering is visible.

If no adapter is connected, or if the adapter has become defective, the display will show this message. The Service Logger will recognize when a sensor is plugged in and automatically set up the correct menus and displays for that sensor.

This is the Operating Mode display for the OM-60-MOD-PP sensor. Each pressure is continuously measured and displayed. This is the mode the Service Logger will go to after it is turned on.

SERVICE LOGGER

VER 2.0

PLEASE

CONNECT SENSORS

PRES1 PRES2

0 PSI 0 PSI

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Dual Pressure Adapter

CHANGING SETTINGS

Every function of the Service Logger can be set through a series of menus. Settings are stored in memory and remain there even without main or backup power source until altered by the user. Each sensor will have settings unique to its function and the Service Logger will select and display the correct menus for each sensor that is plugged in.

Changing Recording Time and Sampling Rate

Press and hold the display changes to the Recording Rate men u . The user may select the sampling rate and recording time for the Service Logger. Use

ENTER

button until the

RECORDING RATE

15 HR EVERY 15 SEC

the

STATUS

RECORD

buttons to change the recording time and sampling rate according to the table listed below.

Recording Time Sampling Rate

40 Days 15 Minutes 2 Weeks 5 Minutes 60 Hours 1 Minute 30 Hours 30 Seconds 15 Hours 15 Seconds 5 Hours 5 Seconds

When the

ENTER

button is pressed 3 more times (to cycle thro u g h th e remaining functions), the recording time and the sampling rate will be saved into memory and the Service Logger will return to the operating mode. Otherwise the unit will return to the operating mode after approximately 1 minute and changes will be saved in to memory.

SETTING PRESSURE SENSORS TO 0 PSI

Under certain conditions and over a period of time the pressure sensors may drift slightly off 0 PSI.

To re-zero the pressure sensors press and h o ld

STATUS

while in the Operating Mode until the

display indicates Initial Zero Pressure. Release

INITIAL

ZERO PRESSURE

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Dual Pressure Adapter

STATUS

the

button. The sensors have now been reset to zero . No te th at fo r

this adjustment to maintain the accuracy of the pressure sensors the pressure at both sensors must actually be at 0 PSI wh en setti n g th e zero point.

Changing Scale to PSI or BAR

Press the

ENTER

button until the display

reads: or

PRESSURE SCALE

IS SET TO PSI

PRESSURE SCALE

IS SET TO BAR

Use the

STATUS

RECORD

buttons to change the setting to th e d esi red

scale.

When the

ENTER

button is pressed twice more (to cycle through the remaining functions), the temperature and pressure scale setting will be saved into memory, and the Service Logger will return to the operating mode. Otherwise the unit will return to the operating mode after approximately 1 minute and changes will be saved in to memory.

RECORDING DATA

One of the most important functions of the Service Logger is to record information over a period of time. This function is like a chart recorder except that the information is stored in memory rather than being printed on paper. The user can choose to print out the inf o rmati o n , tran sfer the i n f o rmati o n to a co mp uter for advanced analysis or long term storage, or review the information on the Service Logger’s display.

In the case of the OM-60-MOD-PP option, each pressure will be recorded. Different sensors will, of course, record different information depending on the function of that sensor. The Service Logger has a memory capacity to record up to 4000 samples of data. It is the op ti o n o f th e u ser to record data to the maximum capacity of the Service Logger or to termi n ate a reco rding when sufficient information has been gathered.

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Dual Pressure Adapter

IMPORTANT ! Each new recording will erase any previously recorded information. It is the responsibility of the user to either print out or store a previous recording prior to starting a new recording.

The first step in making a recording is to select the proper recording time and sample rate. If a sampling rate of 15 seconds is being used, then every 15 seconds each pressure will be measured and stored into digital memory. No record of information is made between each interval even though the display will continuously show the environment the OM-60-MOD-PP sensors are exposed to.

For a recording to accurately reflect a series of events, it is u p to the u ser to select a recording interval that best suits the particular application. In some situations maximum record i n g time may be sacrificed so tha t more frequent sampling of the conditions may be accomplished. Long term monitoring will require less frequent sampling in favor of longer recording times.

The next step is to select how the Service Logger will record the information from the OM-60-MOD-PP sensor. There are 3 possible ways to record information.

Press and hold the

recording modes can be scrolled and changed by using

RECORD

button until the record display appears. The four

RECORD

button:

1. Record information to memory only. This option stores information into memory. No printer or computer connection is required for this function.

2. Record information to a printer. This option does not store information into memory, but does print each sample as it is recorded to a printer. This is referred to as REAL TIME PRINTING. A printer must be connected for this function! If no printer is connected, or if the printer is off-line, or if the printer is out of paper an error message will be displayed to alert the user to a problem. Switching to this option will terminate recording if the Service Logger was set to record previously.

3. Record information to memory and to a printer. This is a combination of options 1 and 2. Information is stored in memory and at

RECORD ON, REAL

TIME PRINT OFF

RECORD OFF, REAL

TIME PRINT ON

RECORD ON, REAL

TIME PRINT ON

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the same time each sample is recorded to a printer. As in option 2., a printer must be con- nected and functioning or an error message will be displayed.

Dual Pressure Adapter

4. If a recording is in progress this option will

terminate all recording functions. This

RECORD OFF, REAL

TIME PRINT OFF

option may also be used if the user decides to cancel a recording session and return to the operating mode.

Press the

RECORD

button after selecting the

recording mode. This will display the starting

DAY HOUR MIN

FRI 15 16

time of the recording. The display will show the starting time of the last recording and allo w

the user to enter a new starting time. The

item that is flashing. Press and hold the

Press the

RECORD

button to change to the next item wh i ch w i ll then start to

STATUS

button will advance the

button to scroll this item.

flash. This will set the starting time of the recording which will be used in the display or printout after a recording has been made. Note that the previous starting time is always displayed when a new recording is started.

When the Service Logger is in the recording mode, it will prevent the user from changing the settings. The user will only be allowed to check the recording rate

when they press the

ENTER

button.

Press the

ENTER

button to return to the operating mo d e an d b eg i n th e

recording. If option 1 or 3 is selected, an "R" will be dis-

played in the upper right hand corner of the display. An "R" indicates a recording is in progress.

While you are recording it is possible to check how much memory has been used. Press and

hold the

STATUS

button until the display

PRES1 PRES2 R

22PSI 130PSI

MON:10:35:00

56% MEM. LEFT

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Dual Pressure Adapter

shows the percent of available remaining memory and the starting time of the recording. As the recording continues this number will decrease. The Service Logger will continue to record until the recording is terminated manually or when all of the available memory has been used. When 0% Memory Left is displayed, this will indicate that almost all of the available memory has been used and the Service Logger will shortly terminate the recording au to mati cally.

Sample of a typical printout at the beginning of recording:

The time is specified using the format D(ays):H(ours):M(inutes):S(econds). This convention is used in the printout and the display.

Service Logger

PRES1 PRES2 Time (D:H:M:S)

44 100 MON:10:35:00 45 103 MON:10:35:50 45 104 MON:10:35:10 46 104 MON:10:35:15

PRINTING RECORDED DATA

After a recording has been made the user will probably want some way to view and analyze the recorded information. This is most easily accomplished by printing out the data samples. The printed data can be analyzed or stored fo r future reference. Several print options are available.

Filtering Printed Record

If the user were to print out a recording which used all of the memory capacity of the Service Logger, this woul d b e a very lo n g reco rd o f 4000 d a ta sa mp les. To print this out line by line on a standard computer printer would use over 60 sheets of paper! Obviously this would be a cumbersome and time consuming process. In most cases the information required from the record is only when the pressure changes. If the pressure remains constant, it is not necessary to print line after line of the same information.

The Service Logger allows the user to select from 1 to 10 PSI o r 0. 0 - 1.0 BAR of either pressure change to print on. What this means is that data samples that are less than the selected pressure change are ignored during the printing process and only when the filtered pressure has changed by the selected amount is a sample printed out. That pressure becomes the new value to comp are to and the filtered pressure will have to change again by the selected amount before another sample is printed.

One important point to remember is that even if a data sample is not printed the Service Logger still has to recall it from memory and compare it to the filter

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Dual Pressure Adapter

selection. Therefore, a printout may take up to 10 minutes for a scan of all 4000 data samples. This may sound complicated, but is easy to understand by using an example recording.

Example:

A recording has been made on an air-conditioning system on the Low Side (Sensor 1) and the High Side (Sensor 2) over a 30 hour period. This means that a dual data sample is recorded every 30 seconds. For the printo ut the user has selected a change of 2 PSI on PRES1. Shown below would be a typical printout of the data using the above selections. In a real printout there will be no spaces between the lines of printing, but in our example these were added to allow room for comments to be inserted.

Service Logger

PRES1(PSI) PRES2(PSI) Time(D:H:M:S)

------------------------------------------------------------------- 15 140 TUE:12:01:00 This is the first data reco rd a n d

the starting time of the recording on Tuesday at 12:01 p.m..

17 145 TUE:15:30:00 The pressure at both sensors is

shown on the same day at 15:30 (3:30 p.m.).

15 145 TUE:17:54:30 The pressure at both sensors is

shown on the same day at17:54 (5:54 p.m.).

13 140 WED:11:05:30 Both sensors show dro p in pres-

sure on the next day at 11:05 a.m.

15 145 WED:13:17:00 Both sen so r s sh o w a n i n crea se i n

pressure on the next day at 13:17 (1:17 p.m.).

End of Data This indicates the end of the re-

cording and show s that PRES1 remained within 2 PSI of the last reading for the remainder of the recording period.

The above example shows that by using the filtering function the user can take a printout that would consume over 60 pages of paper and condense it into a single page.

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How to Send Recorded Data to a Printer

Press appears. This is where the print function is accessed.

ENTER

several times until this display

Dual Pressure Adapter

PUSH MENU TO RUN

OTHERS TO PRINT

Press

STATUS

RECORD

to scroll through

the print options until this display appears.

Press

ENTER

to advance to the next print selection.

This is the first filter option. Selecting this will print every data sample that has recorded data.

Press

STATUS

to select a pressure sensor 1

filter function from 1 to 10 PSI (0.0 - 0.1 BAR).

Press

RECORD

to select a pressure sensor 2 filter function, from 1 to 10 PSI (0.0 - 0.1 BAR) can be selected as a filter function. Then press

ENTER

to continue.

is pushed, the Service logger will

return to the operating mode.

SEND RECORDED

DATA TO PRINTER

SEND OUT ALL OF

THE PRESSURE DATA

SEND PRES1 ON

X PSI CHANGE

SEND PRES2

ON X PSI CHANGE

PUSH ^ START PRT

PUSH MENU QUIT

STATUS

is pushed, the printing will begin and the flashing dots will indicate printing functions. When the Service Logger is finished printing it will return to the Operating Mode.

PRINTING

PLEASE WAIT…

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Dual Pressure Adapter

Printer Error Messages

If a printer is not connected and set to operate, an error messa ge will be displayed to alert the user to a printer problem.

There are several possible problems that may occur if the printer is not ready. The Service Logger will alert the user to a problem with the printer. As each printer has its own set of controls and settings, the user is recommended to consult the owners manual supplied with the printer.

This is an error message that appears when the printer is not connected or turned off. Make sure

PLEASE CONNECT

THE PRINTER

the printer cable is attached to both the printer and the Service Logger and that power is supplied to the printer.

This is an error message to alert the user that the printer has run out of paper. Refer to the

PRINTER IS OUT

OF PAPER

owners manual of the printer for instructions on paper replacement.

This is an error message that indicates the printer has not been set to ON LINE. Refer to the

PRINTER IS NOT

ON LINE

owners manual for specific instructions on setting the printer controls.

VIEWING RECORDED DATA

One of the features of the Service Logger is that recorded information may be read directly on the display. The same filter functions that are available for printing data are also available for reading data on the display. This allows the user to let the Service Logger scan the recorded data and display only the information that is of interest to the user. Without this function the user would have to manually scan a poten ti a l 4000 d a ta sa mp les to fi n d th e i n f o r mati on of interest.

Press and hold appears. The actual recording rate is unimportant.

ENTER

until this display

RECORDING RATE

XXHR EVERY XXSEC

Press

ENTER

again to cycle to the next screen. As before the scale does not pertain to the viewing function.

TEMPERATURE SET

TO FAHRENHEIT

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Dual Pressure Adapter

This is where the viewing function is accessed.

Press

STATUS

RECORD

to access this

menu.

Press the

RECORD

button once to scroll to this

function.

Press

ENTER

to advance to the next display selection. This is the first filter option. Selecting this will

print every data sample that has been recorded.

Press

function otherwise press

Use the

STATUS

to select a pressure filter

ENTER

to continue.

button to select 1 to 10 PSI or

0.0 to 1.0 BAR of pressure change, then press

ENTER

to continue.

PUSH MENU TO RUN

OTHERS TO PRINT

READ RECORDED

DATA FROM SCREEN

SEND OUT ALL OF

THE PRES1 DATA

SEND PRES1 ON

X PSI CHANGE

Press

RECORD

to select a pressure filter function, from 1 to 10 PSI or 0.0 to 1.0 BAR can be selected as a filter function. Then press

ENTER

This is the first data sample. Press

to continue.

STATUS

advance forward through the data samples.

Press

RECORD

to go backwards through th e data samples.

This indicates the end of a data recording. Press

SEND PRES2

ON X PSI CHANGE

TUE:14:22:25

127 PSI 37 PSI

REACHED THE END

OF RECORDED DATA

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Dual Pressure Adapter

STATUS

recording or

Press

to return to the beginning of the data

ENTER

RECORD

to go to the last previous data sample.

at any time to return to the Operating Mode.

TRANSFERRING DATA TO A COMPUTER

After a recording has been made the user may download the data to any PC compatible computer. The advantage of doing this is that it allows the use of more sophisticated analysis tools as well as a long term storage. Unlike the Print and View functions no filtering options are available in this mode. The entire recording is sent to the computer. The supplied software will convert the data recording to an ASCII file which can then be imported into a variety of data analysis software, word processi n g , a n d d a ta b a se p ro g ra ms.

It is suggested that if the user plans to download recorded data on a regular basis to copy the transfer program to the u sers ha rd d i sk. To start th e transfer program insert the supplied diskette in drive A. Type “A:SUPCO” and follow instructions on the computer screen, a README file is also included on the floppy diskette which has detailed instructions on the use of the transfer program and reflects the latest information that is not included in this manual.

IMPORTANT! To use this function the 25 pin cable (DB25 Male-M ale) must be c onnected to the Service Logger and the PC compatible computer printer port. If you are unsure of which connector is the printer port, c onsult the ow ners manual which was supplied with the computer.

The computer transfer cable can be purchased from OMEGA or authorized dealer as part # OM-CC6.