manual klimet a30 englisch v1_30

8/11/2019 Manual Klimet A30 Englisch V1_30

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Hofstrasse 92 Tel +41 1 934 40 40CH-8620 Wetzikon 1 Fax +41 1 934 40 99Internet: www.meteolabor.ch E-Mail: [email protected]

Operating instructionsand interface description

KLIMET A30

2. November 2004Software Ver 1.30


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KLIMET A30 Operating instructions Page 2 (14)

meteolabor ag CH-8620 Wetzikon November/2/2004File: Manual Englisch V1.30.doc

Contents1 Transport, storage ..........................................................................................................................................32 Installation, setting up ....................................................................................................................................33 Technical data .................................................................................................................................................3

3.1 Installed loads...........................................................................................................................................................33.2 General ...................................................................................................................................................................... 33.3

Measurement cycle...................................................................................................................................................3

3.4 Standard deviation....................................................................................................................................................43.4.1 Air temperature.............................................. ..................................................... ............................................. 43.4.2 Temperature differences..................................................................................................................................43.4.3 Dew point temperature.....................................................................................................................................43.4.4 Relative humidity..............................................................................................................................................43.4.5 Atmospheric pressure................................................ ..................................................... ................................. 4

4 Maintenance.....................................................................................................................................................55 Indication of special operating conditions...................................................................................................56 Calibration........................................................................................................................................................5

6.1 Calibration of the barometer KLA30-P35 ................................................................................................................ 5Command desciption of barometer KLA30 P35.......................................................... ............................................... 5Simple offset adjustment.............................................................................................................................................6Offset and span adjustment ................................................... ................................................................ ..................... 7

6.2

Calibration of the barometer KLA30-P (Serial Numbers 0001.. 0021)...................................................................7

Simple offset adjustment.............................................................................................................................................7Offset and span adjustment ................................................... ................................................................ ..................... 7

6.3 Calibration of the thermometer................................................................................................................................76.4 Calibration of the dew-point temperature...............................................................................................................8

7 Data format ......................................................................................................................................................87.1 General ...................................................................................................................................................................... 87.2 Data communication cable ......................................................................................................................................8

8 Command set...................................................................................................................................................98.1 Standard commands ................................................................................................................................................ 9

8.1.1 AQ, measured value query ................................................ ................................................................... ...........98.1.2 AP, atmospheric pressure......................................... ........................................................ ............................... 98.1.3 AT, temperature....... ........................................................ .................................................................... ............98.1.4 AU, dew point temperature .................................................. ................................................................. ...........98.1.5

AZ, set/read time................................................................................... ......................................................... 10

8.1.6 AI, identification................................................................ ......................................................................... .....108.1.7 AS, status request......................................................................................... ................................................. 108.1.8 AA, send buffer again ...................................................... .......................................................................... ....108.1.9 AC, cleaning mirror ............................................ .................................................... ........................................ 108.1.10AM, select measurement input .................................................. .................................................................... 118.1.11AD, measurement interval ...................................................... ....................................................................... 118.1.12AR, remote resetting.............. ........................................................ ................................................................ 12

8.2 Commands for calibration ..................................................................................................................................... 128.2.1 AO, set offset calibration values ................................................... ................................................................. 128.2.2 AH, set correction factor calibration values............................. .................................................................. .....128.2.3 AE, write to EEPROM............................. .................................................... ................................................... 128.2.4 AL, read calibration values..................................................................... ........................................................ 12

8.3 Commands for addressed operation .................................................................................................................... 13

8.3.1

AG, set sensor address ...................................................... ....................................................................... ....148.3.2 AK, Kiss protocol........................................................................................ .................................................... 14


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1 Transport, storage

Storage temperature: 5C (41F) to 50C (104F).Atmospheric humidity: 10 to 80% relative atmospheric humidity, noncondensing.Atmospheric pressure: 800...1060 hPa (transport in aircraft only in pressurized cabin; if the lower and upper specified limits

of the atmospheric pressure are violated, recalibration is necessary).Weight: 7.9 kgDimensions: width 450 mm, height 152 mm (19 inch standard housing, 3 height modules), depth 350 mm.

The instrument should remain connected to the power supply and switched on even when not in use.

2 Installation, setting up

Important: in order to measure the correct atmospheric pressure, the instrument must be positioned at the height at whichthe pressure should be measured, connection of a hose is not sufficient! Reference point for the calibration is the height ofthe instrument. The instrument must be set up horizontally.

If the dew-point sensor is operated via a hose, the fan must be switched to full power; to do this, short diode ZD1 (3.3 V) onthe board with the temperature inputs (KLA30 T4) by closing the soldering jumper LB1. If necessary, the fan can also beswitched over to continuous operation by closing the soldiering jumper LB2.

3 Technical data

3.1 Installed loads

Operating voltage: Selectable 200...250 V or 100...130 V, 50/60 HzPower consumption: Typically 3.8 VA, max: 10 VA

3.2 General

The specified accuracy is first reached after a warm-up time of min. 90 minutes. The instrument should always remainswitched on.

The specifications apply to a calibration interval of 12 months.

3.3 Measurement cycle

The measurement cycle is 5 minutes, measurement is always performed according to the following scheme:Time Measurement0:00...3:00 test of dew-point mirror, clean if necessary3:00...3:40 fan on, adjust mirror system3:40...4:50 measurement4:50...4:52 evaluation, output new measured value/new measured value ready4:52...5:00 wait until time x:x0 or x:x5


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3.4 Standard deviation

The standard deviation of the values sampled during the measurement time (70 s) is specified.

3.4.1 Air temperature

Resolution: 0.001 C

Measurement range: 15...25 C KLIMET A30-I: -100...+100 CAccuracy: +/-0.05 K KLIMET A30-I: -20...+60 C +/- 0.08 K-100...+100 C +/- 0.10 K

Standard deviation at constant temperature:


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4 Maintenance

The instrument and its sensors require no maintenance. The dew-point mirror is also maintained automatically and needs nomanual cleaning.

5 Indication of special operating conditions

The KLIMET A30 data message contains a status value which indicates certain malfunctions.Several status messages can appear at the same time, the corresponding bits in the status byte are then added. Status

messages

ccc Checksum (must have 3 digits)

The "Frame"A97......ccc which surrounds the commands has a fixed format, there must always be a 2 digit address

and a 3 digit checksum. By switching off the checksum test, you might enter any 3 digits as the checksum.


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The most important commands

A97Eccc Write data to EEPROM

Write individual data to EEPROM.

Example:

A97Eccc

A97Lccc Read calibraton value

Example:

A97L20ccc Read calibration value 20

A97Rccc Remote reset

The software will wait in a loop, letting the watchdog reset circuit performing a hardware reset.

Example: A97Rccc

A97W:ccc Send adjustement value to barometer

The calibration value is stored in the RAM of the barometer. Attention: After successful adjustment, you must enter the

corresponding command, to copy the values to EEPROM.

Nr.: Number of the calibration value

EW: calibration value

Examples:

A97W20:-0.10ccc calibration value [20] = -0.10

A97W21:1.009ccc calibration value [21] = 1.009

Simple offset adjustment

For this adjustment, a constant value EW[20] will be added to the measured air pressure. The offset is derived from acalibrated reference cell.

POffset= PRef PThe value will be stored as EW[20].

Example:

A97W20,-0.10ccc

Now the KLIMET A30 shows in column 2 the corrected air pressure PK and in column 1 the air pressure before correction.

The corrected air pressure must now be equal to the reverence cell.

If the values are corresponding, then the calibration values must be stored in EEPROM by invoking the command

A97Eccc.

By invoking the commandA00Rccc the KLIMET A30 and also the barometer returns in normal operation.


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Offset and span adjustment

For an offset and span correction, min 2 measuring points are needed. By means of the linear regression the offset b and

the slope m (span) is calculated. To start calculation you need the uncorrected values P displayed in the first column.

The software calculates the corrected air pressure PKfrom the formula:

PK= m * P + bThe offset will be stored in AVW[20] die slope m (span) as AVW[21].

Example:A97W20:-0.10ccc

A97W21:1.009ccc

To double-check if the adjustment is correct a second measuring is needed.

If the values are corresponding, then the calibration values must be stored in EEPROM by invoking the command

A97Eccc.

By invoking the commandA00Rccc the KLIMET A30 and also the Barometer returns in normal operation.

6.2 Calibration of the barometer KLA30-P (Serial Numbers 0001.. 0021)

The barometer must not be calibrated over the entire measurement range, but only over the range applicable to the intendedmeasurement location (usually 850...1060 hPa). After the calibration, the atmospheric pressure must never exceed or dropbelow the selected range. If the barometer is transported in an aircraft, it must be kept in a pressurized cabin.

For calibration of the barometer, the measurement cycle can be accelerated: Enter commands "AVQ" (fast measurementcycle) and "AD10" (10 s integration time) to output a measured value every 10 s.

Simple offset adjustment

For this adjustment, a constant value EW[19] will be added to the measured air pressure. The offset is derived from a

calibrated reference cell.

POffset= PRef PThe value will be stored as AVW[19].

Example:

AVW19,-0.10


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6.4 Calibration of the dew-point temperature

It is essential to perform calibration of the dew-point sensor using the standard measurement procedure. The measurementtime is 70 s in this case. The built-in fan is switched on approx. 40 s before the measurement is started.For this calibration, the sensor can be removed from the housing and placed in a test chamber or the air can be introducedusing a hose. If more than 1 m hose is attached, the air must be actively pumped through the system (throughput > 1liter/min).

7 Data format

7.1 General

The data interchange between KLIMET A30 and a PC takes place via an RS232 interface.The data are transferred in ASCII format.

Each command starts with the letter "A" and is closed with "CR" (carriage return, ASCII 13).Any line feed characters (ASCII 10) are ignored.

All commands must be entered in UPPERCASE LETTERS.

Setting of the interface: 2400 baud, 8 bits, no parity.

7.2 Data communication cablePinout of the interface connector:

Pin signal signal direction2 RXD from Computer to KLIMET A303 TXD from KLIMET A30 to Computer5 GND

Note: Use a Nullmodem cable for connection to a PC.

Nullmodem cable for PC with DB9 connector:

Nullmodem cable for PC with DB9 connector:

Klimet A30

7

9

8

DB9

4

3

2

1

6

5 PC

7

9

8

DB9

4

3

2

1

6

5

Klimet A30

7

9

8

DB91

2

4

3

5

6

22

23

25

24

7

14

21

20

19

18

17

16

15

10

11

12

13

9

8

DB25

4

3

2

1

6

5

PC


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8 Command set

Command, PC to sensor

A {parameter}"CR LF"(The LF characters are optional, i .e. they will be ignored by the system).

8.1 Standard commands

8.1.1 AQ, measured value query

AQ KLIMET A30 sends a complete set of measured values to the PC

Example: Q..,::,,,,,,,std dev. dewpoint>,, "CR LF"

Example: Q0,14.3.96,11:40:00,952.023,23.934,15.433,89.53,0.045,0.003,0.010,0.035Status: 0Date: 14.3.96Time: 11:40:00Pressure: 952.023 hPa

Temperature: 23.934 CDew point: 15.433 CHumidity: 89.53 %Standard dev. pressure: 0.045 hPaStandard dev. temperature: 0.003 KStandard dev. dew point: 0.010 KStandard dev. humidity: 0.035 %

Only the measured values selected with the command "AM" are outputted. (Default: as shown in example.)

8.1.2 AP, atmospheric pressure

AP output current atmospheric pressure

Example: P 951.344 = atmospheric pressure 951.344 hPa

8.1.3 AT, temperature

AT{sensor number} output current temperature

Example: T23.456 = temperature 23.456C

8.1.4 AU, dew point temperature

AU output current dew-point temperature

Example: U20.456 = dew point temperature 20.456C


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8.1.5 AZ, set/read time

AZ..,::Set KLIMET A30 clock

Example: AZ31.1.96, 12:31:5 = 31st Jan. 96, 12:31:05

- Four figures can be entered for the year if desired.- Entry of the seconds is optional, without any entry the clock will be started with xx:xx:00.

AZ Read clock

Example: 31:1:96,12:31:50 = 31st Jan. 96, 12:31:05

8.1.6 AI, identification

AI KLIMET A30 sends an identification message to the PC.

Example: KLIMET A30, Ver 1.1, 00, SN 000002Instrument, software version, address, serial number

8.1.7 AS, status request

AS KLIMET A30 sends a status message to the PC.

Example: Intervall: 0 s Setting of the interval (0 = off)pwr on since 201 s Time since instrument switched onlast cleaning: 1.3.96, 14:45:00 Date and time of last mirror cleaningcleaning intervall: 460 cycles Cleaning intervalready

8.1.8 AA, send buffer again

AA The complete content of the RS232 buffer will be sent again to the PC.(This function may be used to measure off-line).

8.1.9 AC, cleaning mirror

AC In the next cycle a mirror cleaning is performed, the dew-point mirror is cleanedautomatically if dirty or at the latest after 5 days


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8.1.10 AM, select measurement input

AM{channel},{on/off} On/off switching of measurement inputs (1 = on, 0 = off)

Channel No Default Function1 on temperature 1

2 on temperature 23 on temperature 34 on temperature 45 on dew point temperature6 off internal compensation channel7 on atmospheric pressure8 on relative humidity12 off differential measurement, sensor 1 - sensor 213 off differential measurement, sensor 1 - sensor 314 off differential measurement, sensor 1 - sensor 434 off differential measurement, sensor 3 - sensor 4

Example: AM1,1temperature 1 on, AM8,0humidity off

AM Request what channels are switched on: The instrument responds with:

Bit Value Function0 1 temperature 11 2 temperature 22 4 temperature 33 8 temperature 44 16 dew point temperature5 32 compensation channel(always on)6 64 atmospheric pressure7 128 relative humidity

Example: 255 inputsall inputs on

AM{no} Alternatively, the numberof the attached temperature sensor can be entered.

Entry of the number of temperature sensors: 90 = no temperature sensor, 91 = 1 sensor

Example: AM93 scan 3 temperature sensors

8.1.11 AD, measurement interval

AD{measurement interval} Output of the data every xx seconds. Primarily of interest for adjustment and forrecording of the climate with a terminal program.0: No interval, output only on request by PC1: Measurement interval 1 second (i.e. as soon as a new measurement value isavailable, = every 5 minutes)With very short interval times, the data are not sent until new measurement data areavailable. The minimummeasurement time is 5 minutes.

If the interval selected is 300, 600, 900, 1200, 1800, 3600 or 7200 seconds (5, 10, 15,20, 30, 60 or 120 Minutes) the output would be synchronized with the clock, i.e. Outputall 2 hours shortly before the full hour. On the other interval times the output will beasynchrony, just after the expiration of the selected time.

Example: AD600 = switch to 10' interval.The "query" data record is outputted every 10 minutes


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8.1.12 AR, remote resetting

AR The program remains in a wait loop until the watchdog circuit resets the entire hardware.

Example: KLIMET A30, Ver 1.0, 00, SN 000002

8.2 Commands for calibration

8.2.1 AO, set offset calibration values

AO{number of the channel},{calibration value}Transfer calibration values to KLIMET A30.

Example: AO1,0.04567 calibration value 1 = 0.04567

Warning:As calibration values are first changed in RAM, they must be saved with the "AE" command to ensure the changeremains permanently stored.

If an offset has already been entered, this is taken into account. In other words, the new offset is added to the existing one.

8.2.2 AH, set correction factor calibration values

AH{number of the channel},{calibration value}Transfer calibration values to KLIMET A30

Example: AH1,10001567 calibration value 1 = 1.0001567

Warning:As calibration values are first changed in RAM, they must be saved with the "AE" command to ensure the changeremains permanently stored.

If a correction factor has already been entered, this is taken into account. In other words, the new entry is multiplied by theexisting correction. Entry of the calibration value "0" deletes the correction, i.e. it is set to 1.0000.

8.2.3 AE, write to EEPROM

AE Copy calibration values from RAM to EEPROM, the copying operation lasts severalseconds and is documented on the screen.

8.2.4 AL, read calibration values

AL Read calibration values of KLIMET A30.

Meaning of the calibration values:

AVW1 Date of the last calibration

AVW6 Correction factor for temperature sensor 1 (the result is multiplied by this factor)AVW7 Correction offset for temperature sensor 1 (added to the result)




AVW14 Correction factor for dew point temperature (the result is multiplied by this factor)AVW15 Correction offset for dew point temperature (added to the result)

AVW18 Correction factor for barometer (the result is multiplied by this factor)AVW19 Correction offset for barometer (added to the result)


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AVW37 Correction factor for differential temperature measurement 1-2 (the result is multiplied by this factor)AVW38 Correction offset for differential temperature measurement 1-2 (added to the result)




AVW50 Measuring interval fast, if AVW50 is bigger then 0 the instrument is started just after powering on.

AVW51 Default value for choosing the measuring inputs (AM1..8) Default is 224

AVW52 Default value for choosing differential measuring (AM1..8) Default is 00

8.3 Commands for addressed operation

"CR LF"

Designates the type of measured value:

P: atmospheric pressure, T: temperature, U: dew point, F: rel. humidityQ: PTUF combined (depending on preselection of measurement channels

: (01...99: free sensor addresses)

informative data

sum of all character values modulo 1000

Sensor address 00: All sensors are addressed with address 0001...99: Free sensor addresses

Instruments with address 00 are addressed by all addresses.If address 00 is selected, the checksum is ignored.

As the "frame" ("A") in which the information is packaged has a fixed data format, 2characters must always be sent for the sensor address and 3 characters for the checksum.


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8.3.1 AG, set sensor address

AG{sensor address} Set new sensor address and switch on addressing mode.

The addressing and checksum is normally "bypassed" thus making the interface somewhat simpler (so-called Kiss mode(Keep It Simple and Stupid), The Kiss mode is activated by switching on the instrument or by entry of A00Kxxx.

The addressing mode is activated as soon as a valid address is entered.

Example: AG23 = New sensor address 23AG00 = General sensor address, instrument responds to all addresses.

8.3.2 AK, Kiss protocol

A{sensor address}K{checksum} Selection of the Kiss protocol, deactivates the addressing as well as the generation andtesting of the checksum.

Example: A00K236 (this command must always be sent with address and checksum: A00K236)

manual klimet a30 englisch v1_30

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