Omega OM-60-TH User guide

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Temperature/Humidity/Dew Point Sensor

OM-60-TH SERVICE LOGGER

TEMPERATURE/HUMIDITY/DEW POINT SENSOR

WITH

The OM-60-TH is a Service Logger with a temperature/humidity/dew point sensor. The OM-60-TH is specified for air use only. The sensor is field interchangeable and is available as part # OM-60-MOD-TH.

Immersion of the sensor in any kind of liquid, or exposure to corrosive chemical env ironme nts and/or cutting or splicing of the OM-60-MOD-TH cables by the user is not recommended and will void the sensor warra nt y .

GETTING STARTED

Plug the OM-60-MOD-TH sensor into the Service Logger. If portable use or battery backup is desired, place a fresh 9V 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 pow er ad a p ter i f a 110 (220) Vo lt o u tlet i s accessible.

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 sensor is connected, or if the sensor has become defective, the display will show this message. The Service Logger will recognize when a sensor is plugged in and will automatically set up the correct menus and displays for that sensor.

This is the Operating Mode display for the OM-60-MOD-TH sensor. Temperature, relative humidity in percentages, and dew point are 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

TEMP RH DEW

74F 42% 49F

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Temperature/Humidity/Dew Point Sensor

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 and backup power sources 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

ENTER

button until the display changes to the to the Recordin g Rate menu. The user may select the sampling rate and recording time for the Service Logger.

RECORDING RATE

15HR EVERY 15SEC

Use the

STATU S

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.

Changing Scale to °F or °C

Press the reads:

ENTER

button until the display

TEMPERATURE SET

TO FAHRENHEIT

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Temperature/Humidity/Dew Point Sensor

TEMPERATURE SET

TO CELSIUS

Use the

STATUS

RECORD

buttons to

change the setting to the desired scale.

When the

ENTER

button is pressed twice more (to cycle through the remaining functions), the temperature 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 into 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 the informati o n, transfer the information to a computer fo r advanced analysis or long term storage, or review the information on the Service Logger’s display.

In the case of the OM-60-MOD-TH sensor, the temperature, relative humidity, and dew point 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 sa mp les o f d a ta . It i s th e o ption of the user to record data to the maximum capacity of the Service Logger or to terminate a recording when sufficient information has been gathered.

IMPORTANT ! Each new recording will erase any previously recorded information. It is th e responsibility of the user to either print or store a previ ous recording prior to starting a new one.

The first step in making a recording is to select the proper recording time and sample rate. If, for example, a sampling rate of 15 seconds is being used, then every 15 seconds the temperature, relative humidity and dew point will be measured and stored into digital memory. No record of information is made between each sample even though the display will continuously show the environment the OM-60-MOD-TH sensor is 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 may be accomplished. Long term monitoring will require less frequent sampling in favor of longer recording times.

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Temperature/Humidity/Dew Point Sensor

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

Press and hold the

RECORD

button until the record display appears. The four

recording modes can be scrolled and changed by using the

1. Record information to memory only. This option stores information into the Service

RECORD ON, REAL

TIME PRINT OFF

Logger’s memory. No printer or computer connection is required for this function.

2. Record information to a printer. This option does not store information into mem-

RECORD OFF, REAL

TIME PRINT ON

ory, 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 record- ing 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

RECORD ON, REAL

TIME PRINT ON

and 2. Information is stored in memory and at the same time each sample is recorded to a printer. As in option 2., a printer must be connected and functioning or an error mess age will be displayed.

STATU S

button:

4. If a recording is in progress, this option will terminate all recording functions. This option may also be used if the user decides to cancel a recording session and return to the operating mode. In order to terminate a

recording, press the

RECORD

button again

at this time.

RECORD OFF, REAL

TIME PRINT OFF

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Temperature/Humidity/Dew Point Sensor

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 allow the user to enter a new starting time.

STATUS

The

button will advance the item that is flashing. Press and hold the

STATUS

button to scroll this item. Press the

RECORD

button to change to the next item which will then start to flash. This will set the starting time of the recording which will appear on 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

Press the

ENTER

button.

button to return to the operating mo d e an d b egi n th e re-

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

played in the upper right hand corner of the

TEMP RH DEW R

76°F 41% 50°F

display. An "R" indicates that 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

WED:14:22:20

78% MEM. LEFT

shows the starting time of the recordi n g an d the percent of available remaining memory. 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 automatically.

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) in the 24 hour system. This convention is used in the printout and the display.

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Temperature/Humidity/Dew Point Sensor

Service Logger

Temp (F) Humi (%) Dew (F) Time (D:H:M:S)

75 40 49 WED:14:03:00 75 40 49 WED:14:03:05 75 40 49 WED 14:03:10 75 40 49 WED:14:03:15

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 Recordings

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. The Service Logger allows the user to print out information based on a change in temperature or a change in relative humidity. Note that only ONE CHANNEL of data can be filtered. In most cases the information required from the record is only when the temperature or relative humidity changes. If the temperature or relative humidity 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° of temperature change or 1 to 10% of relative humidity change to print out. What this means is that data samples that are less than the selected temperature or relative h u mid ity change are ignored during the printing process and only when the temperature or relative humidity has changed by the selected amount is a sample printed out. That temperature or relative humidity becomes the new value to compare to and the temperature or relative humidity 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 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 of an office over a 30 hour period to monitor air quality. This means that a data sample is recorded every 30 seconds. For the printout, the user has selected a change of 2° of temperature. Shown below

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Temperature/Humidity/Dew Point Sensor

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

Temp(F) Humi(%) Dew(F) Time(D:H:M:S)

------------------------------------------------------------------- 74 40 49 MON:08:25:00 This is the first data record

and starting time of the re cording on Monday at 8:25 a.m.

76 38 48 MON:10:25:00 The room has warmed up

by 2° at 10:25 a.m. on the same day.

78 42 53 MON:13:42:30 The room has continued

to warm by 2° at 13:42 (1:42 p.m.) on the same Monday.

76 42 51 MON:18:58:30 The room has cooled by

2° at 18:58 (6:58 p.m.) on the same Monday.

74 38 47 TUE:06:03:00 The room has continued

to cool by another 2° at 6:03 a.m. on the Tuesday of the same week.

72 36 43 TUE:09:14:30 The room has cooled by

2° at 9:14 a.m. on the Tuesday of the same week.

End of Data This indicates the end of

the recording and shows that the temperature remained within 2° of 72°F for the remainder of the recording period.

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Temperature/Humidity/Dew Point Sensor

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.

How to Send Recorded Data to a Printer

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

ENTER

several times until this display

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.

Press

STATUS

to select a temperature filter function, or

Press

RECORD

to select a relative humidity filtering function.

ENTER

to continue.

is pushed, the Service logger will

Press

If return to the operating mode.

STATUS

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

SEND RECORDED

DATA TO PRINTER

SEND OUT ALL OF

THE TEMP DATA

SEND TEMP ON

X DEGREE CHANGE

SEND HUMIDITY

ON X % CHANGE

PUSH ^ START PRT

PUSH MENU TO QUIT

PRINTING

PLEASE WAIT…

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Temperature/Humidity/Dew Point Sensor

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 recommend 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

PLEASE CONNECT

THE PRINTER

sure 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 to indicate that 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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Temperature/Humidity/Dew Point Sensor

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 or

STATUS

to select a temperature filtering

RECORD

to select a relative

humidity filtering function.

Use the

temperature change, then press

STATUS

button to select 1° to 10° of

ENTER

continue.

PUSH MENU TO RUN

OTHERS TO PRINT

READ RECORDED

DATA FROM SCREEN

SEND OUT ALL OF

TEMP DATA

SEND OUT ALL OF

HUMIDITY DATA

SEND TEMP ON

X DEGREE CHANGE

Use the

relative humidity change, then press

RECORD

button to select 1 to 10%

ENTER

to continue.

This is the first data sample. Press

STATUS

advance forward through the data samples.

Press

RECORD

to go backwards through th e data samples. Note that the top line of th e d i sp lay will show the time the sample was record ed .

This indicates the end of a data recording. Press

STATUS

to return to the beginning of the data

SEND HUMIDITY ON X % CHANGE

WED:14:22:15

73°F 42% 48°F

REACHED THE END

OF RECORDED DATA

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Temperature/Humidity/Dew Point Sensor

recording or

RECORD

to go to the last previous

data sample.

Press

ENTER

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 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 pro cessin g , a n d d a ta b a se p r o g ra ms. It i s su g g ested th a t i f the user plans to download recorded da ta o n a reg ular b a si s to co p y the tran sfer program to the users hard disk.

To start the transfer program, insert the supplied d i skette i n dr ive A. Typ e “A:SUPCO” and follow the 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 informatio n th at i s no t i ncluded 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 consult the owners manual which was supplied with the computer.

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

The printer cable can be purchased from OMEGA or authorized dealer as part # OM-PC6.