Jaap's Psion II Page

THE SF10 ORGANISER LOGGER MANUAL


Contents

Installation Program Extraction Operation 1 ORGANISER MAIN MENU 2 LOGGER MAIN MENU 2.1 NEW LOGGING SESSION 2.1.1 SETTING THE CHANNELS 2.1.2 THE LOGGING PERIOD 2.1.3 PROVIDING A FILENAME 2.2 NUMBER OF RECORDS 2.2.1 SETTING THE START TIME 2.3 DURING LOGGING 2.3.1 GOING TO SLEEP 3 HAVING A LOOK 3.1 LOOKING AT THE DATA 3.2 STATISTICS 3.3 CHECKING THE PERIOD 3.4 CHECKING ON PROGRESS 3.5 CHECKING THE INPUTS 3.6 CHOOSING A FILE 4 DUMPING THE RESULTS 4.1 TABULAR FORMAT 4.2 GRAPHICAL FORMAT 4.3 OUTPUT TO A COMPUTER 5 CONFIGURING THE SYSTEM 5.1 SETTING THE TIME 5.2 SETTING THE PRINTER 5.3 QUIET OPERATION 5.4 LOGGING ON REQUEST 5.5 REMOTE LOGGING 6 DELETING FILES 7 SWITCHING OFF Warranty APPENDIX A: SPECIFICATIONS APPENDIX B: ELECTRICAL CONNECTIONS APPENDIX C: OPERATION OF STANDARD 'ORGANISER' FUNCTIONS APPENDIX D: INPUT CONVERSIONS FROM OPL APPENDIX E: CONNECTION TO EPSON PRINTER OR PC


Installation

To install the logger software, place a Digitron SF10 Datapak in Datapak socket 'C' (the lower of the two sockets on your Organiser), Type the ON/CLEAR key to turn the Organiser on, wait until the normal menu appears.

Type the ON/CLEAR key again to load the logger's main routine into the RAM of the Organiser. The main menu will now have 'LOGGER' as its first option.

NB: While the logger software is needed, do not remove the SF10 Datapak from the 'C' socket. To use other Datapaks, place them only in the 'B' or upper socket of the Organiser.


Program Extraction

The logger software will be resident in the RAM even when the Organiser is powered off. If the software Datapak is taken out of the Organiser ensure the ON/CLEAR Key is pressed twice after the Datapak has been taken out (see Psion Organiser manual).


Operation

1 ORGANISER MAIN MENU

LOGGER FIND SAVE DIARY CALC PROG

This is the menu presented by the Organiser when it is first switched on with the Logger program installed. On this menu, 'LOGGER' is the only extra option other than those presented by a standard organiser.

To activate the logger, press 'L' or 'EXE' - menu items are always accessed by pressing the initial letter of the option, or by pressing 'EXE' when the cursor is over the required option. The cursor is moved by using the four arrow keys on the top row of the keyboard.

For information on the use 'FIND,' 'DIARY' etc., see the instruction manual for the standard 'Organiser'. The presence of the logger software has limited effects on the normal operation of the 'Organiser'. For details see appendix C.

Having pressed 'L', the main logger menu should be presented:


2 LOGGER MAIN MENU

New Look Config  Stop Dump Erase

It should be noted that this menu, and all the logger sub-menus, are in lower case with upper case initial letters. This differs from the standard "Organiser" menus which are all in upper case.

Access to any of these options is as above, i.e. by pressing the initial letter or moving the cursor and pressing EXE. The initial fetters are unique within each menu. Pressing the ON/CLEAR key from any menu will return you to the previous menu, or the one above in the hierarchy. Pressing "New" allows you to start a new logging session.

2.1 NEW LOGGING SESSION

Internal Datapak

If you have an optional Datapak fitted in the top side slot of the 'Organiser ', you must first define whether you want to save the recorded data in the internal memory of the 'Organiser' or in a 'Datapak'. Use the arrow keys, the initial letter of your choice, or EXE to make your choice. Datapaks have the advantage of potentially larger storage space, and the data is non-volatile, but ROM packs make much more use of the battery and are slower to write data to. Logging periods of one second cannot be used when logging to Datapaks.

After selecting internal memory or Datapak the following menu appears:

Chans Name Recs  Period Start

Before a session can commence, the logger needs to know several important parameters:

  1. How many channels are to be used, and which input is connected to each channel;
  2. How frequently the readings should be taken.
  3. How many records are required before stopping; and
  4. When the logging session should commence.

It is also useful to give the session a name, which can be used for future reference, especially if the logger is to be used to store more than one set of readings at any given time.

Before starting a new session, these parameters should be set by the user. If they are not, a default set will be used. This will normally be the same parameters as was last used, i.e. for the last logging session recorded or 'played back' (viewed or dumped). When the software is first loaded, the defaults are:

Inputs: Channel one: thermistor ( * C): others unused.
Interval: One Minute
Number of Records: Ten
Name: (see section 2.1.3)

The default values cart easily be seen by choosing the various options in the menu (see below). The current value will always be 'highlighted' with a blinking cursor.

2.1.1 SETTING THE CHANNELS

Chan.1 : Unused  Temp RH mV bars

This menu is accessed by choosing 'Chans' from the 'New' menu. Use the cursor keys or the initial letter of your choice, or just press EXE to keep the setting at its current value. As each channel is specified, the screen will move to the next channel ready to accept input. Pressing ON/CLEAR will go back to the previous menu. At least one channel must be specified (i.e. not 'unused'). After setting the fourth channel, this menu will automatically exit back to the 'New' menu.

Pressing 'Temp' invokes another menu which determines which type of temperature sensor is connected:

Thermistor   TC960°C TC160°C

TC960 °C is Type K thermocouples range -40 °C to +960°C alternatively TC160°C is -40°C to +160.0°C. Use the arrow keys and/or press EXE to choose your selection, or ON/CLEAR to go back to the main channel selection menu.

2.1.2 THE LOGGING PERIOD

Logging Interval 00 mins 05 secs

The logging period can be set between one second and fifteen days. This default screen allows the setting of periods up to 30 minutes, in any combination of minutes and seconds. In this mode, the digit keys (0-9) will be active rather than the normal letter keys they represent (I,J,K etc). Just overtype the values that you require, using the digit keys, then press EXE when the displayed value is correct.

Note that, if data is being saved in a 'Datapak' the minimum period allowed is 2 seconds to allow time to 'blow' the EPROM in these paks. If an interval of more than 30 minutes is required, pressing the 'MODE' key changes the display as follows:

Logging Interval 00day 00hr 01min

or something similar, depending on the current default value.

Any combination of days, hours and minutes up to fifteen flays can be entered. Use 'MODE' to go back to the minutes/seconds screen, or EXE to set the desired interval.

If you wish to log at regular intervals AND on request in the same session, go back to the 'Config' menu and choose 'Req' (see section 5.4)

Error Message

Period too short 1560/1000

If you get an error message like this, either now or when the session actually begins, you will need to make some adjustments. This message means that you are attempting to take a reading every 1000 milliseconds, but that the process of taking a reading takes 1560 milliseconds, so you are attempting the impossible.

Solutions are:

  1. Use a longer logging period;
  2. Disable log-on-request (saves 4 seconds per reading);
  3. Log to Internal memory or Rampak, not to Datapak.

2.1.3 PROVIDING A FILENAME

Name for file   T0153

Choosing 'Name' from the 'New' menu enables you to specify a name for the logging session. When the logger is used to store the results of multiple logging sessions, it is useful to provide meaningful names which will be used in menus automatically when you later wish to view or output a set of readings.

The default filename displayed can be used, if required, or edited. To clear it completely press the ON/CLEAR key. This default name is made up from the current time (hours and minutes) after the letter T.

You may enter up to eight letters (or digits by making use of the SHIFT key), but the name must start with a letter and cannot contain any punctuation.

2.2 NUMBER OF RECORDS

Records: 10   (maximum 4540)

When you choose 'Recs' from the 'New' menu you will be prompted for the number of records required for the session, in this mode, the digit keys (0-9) will be active rather than the normal letter keys they represent (I,J,K etc). Any number up to the maximum shown may be entered by pressing EXE when the required value is shown. The 'DEL' key can be used for correcting keying errors, or the 'ON/CLEAR' key for resetting to zero. The maximum allowed will depend on several factors.

  1. The size of the Datapak fitted (if any);
  2. The number and sizes of any previous logging sessions stored in memory;
  3. The number of channels configured as active;
  4. Whether or not the log-on-request facility is in use. If so, more memory is required to store irregular sizes of intervals between successive records.

With no previous session stored, logging on one channel only and without log-on-request, over 9000 records should be available in the internal memory of an Organiser XP with 32K Datapak.

2.2.1 SETTING THE START TIME

Start logging   Now or Later

Selecting 'Start' from the 'New' menu displays this screen. Pressing 'N' (for 'Now') or EXE will commence logging straight away. If 'Later' is chosen (by pressing 'L'), any time up to 21 days in the future can be selected for logging to commence:

Start logging at 13:00:00 16Aug89

Use the cursor keys to select which digit to change, then key in the required time and/or date. To change the month, use the appropriate letter keys, e.g. 'A' will select 'Aug' for August. Successive use of 'J', for example, will toggle between January/June/July. Press EXE when the values have been keyed in. The logger will now remain in a 'dormant' state until the required start time.

This facility is also useful if you would like to start logging now, but to make sure that readings are taken at the exact minute boundaries, for example (with a two min period) at

13:20:00, 13:22:00, 13:24:00 etc.

rather than for example

13:19:23, 13:21:23, 13:23:23.

2.3 DURING LOGGING

19.5 °C L 1134mV 2098 mV unused

When logging commences the current state of the four input channels is displayed, showing the latest readings taken in engineering units. For example, with a logging session configured as channel 1 as temperature channels 2 and 3 as millivolts and channel 4 unused, something like the display above will be shown, (Channel 2 is shown in the top right hand corner.) These values will usually be updated every second.

This is the same screen as used for 'View' chosen from the 'Main' menu. The flashing letter 'L' here serves as a reminder that a logging session is in progress. An additional letter 'R' indicates that log-on-request mode is enabled (see section 5.4).

Every time a set of readings is taken, the logger will emit a short tone unless the 'Quiet' option has been selected. (see section 5.3).

Only three keys are effective whilst this screen is displayed. Pressing the ON/CLEAR or the EXE key escapes to the 'look' menu described in section 3.

If the 'log-on-request' option has been; chosen for the logging session, then pressing 'R' (for request) while this screen is displayed will cause a record to be logged. For more details see section 5.4.

2.3.1 GOING TO SLEEP

If the logging period chosen is less than three seconds then the 'while logging' screen will be displayed, being updated every second, until either the session finishes or there is some user intervention.

To conserve battery power, however, logging intervals of three seconds or more make use of a 'sleep' mode between taking readings. About five minutes after the session starts, the screen will blank out. The logger will then 'wake up' automatically to take readings at the correct times. A short tone will be emitted when each record is taken.

If, while, the logger is asleep, you wish to see what is going on, simply press the ON/CLEAR key to wake up the 'Organiser'. The 'Look' menu will be displayed, allowing you to check on progress.

To stop the logging session prematurely (i.e. before the requested number of readings has been taken), press ON/CLEAR again to jump back to the 'Main' menu then choose the 'Stop' option.


3 HAVING A LOOK

Data Stat Period Recs View File

This menu is presented when 'Look' is chosen from the main logging menu, it enables you to examine details of the logging session stored in memory.

If no logging session is taking place, and there is more than one set of records (more than one file) stored in memory, the default file to be looked at wiil be the last one recorded or the last one looked at previously. To see the filename, or change the file to look at, choose the 'File' option - see section 3.6.

3.1 LOOKING AT THE DATA

13:23:00 16Aug89 ch1rec1 20.6°C

Selecting 'Data' from this menu allows examination of stored data, record by record and channel by channel. The first screen presented gives the recorded data for channel no.1 of the first record, as in the example above.

Pressing the cursor keys {the four arrows on the top row) will change the displayed readings as follows:

UP displays the same channel for the previous record;
DOWN displays the same channel for the next record ;
LEFT displays the same record, but the previous channel ;
RIGHT displays the same record, but the next channel.

All these effects are cyclic, For example, if the first record is displayed when Up is pressed, the LAST record in the file will be displayed. Similarly, if channel 4 is displayed when RIGHT is pressed, channel 1 will be shown. A short "beep" is emitted when these displays cycle round.

The keys will autorepeat for fast scanning through results, or for faster scanning through large sets of data, the F (for fast) key will increment the record count by 10 at a time, if a logging session is still in progress the scanning action will be slowed down.

Note that if only one channel was in use for the logging session, the LEFT and RIGHT keys will have no effect.

To escape from this display, press the ON/CLEAR or EXE keys.

3.2 STATISTICS

Ch.1:max: 20.9°C 15:35:00 17Aug89

This is an example of the display shown when 'Stats' is selected from the 'Look' menu, in this mode, you can view maximum and minimum values logged for each channel, along with the times that these were logged, and the average value for each channel. If the logging session is still underway, then the statistics are calculated on data collected so far.

The keys act in a similar way as for the 'Data' screen:

UP for the same channel, but a different statistic;
DOWN for the same channel, but a different statistic;
LEFT for the same statistic on the previous channel;
RIGHT for the same statistic on the next channel.

To escape from this display, use the ON/CLEAR key as usual.

3.3 CHECKING THE PERIOD

Logging Interval 02 mins 00 secs

If you wish to check on the period for a session, select 'Period' from the 'Look' menu. This may be useful if your file consist of records taken at many irregular intervals (using the 'log-on-request' function) as well as at regular times.

3.4 CHECKING ON PROGRESS

Records : 23   out of 500

Selecting 'Recs' from the 'Look' menu allows you to see how many records have been taken so far, if this screen is on the display when the logger 'goes to sleep' during a session, the new number of records will be displayed on the screen momentarily every time the logger wakes for a new record.

3.5 CHECKING THE INPUTS

1975mV 20.7°C   34% unused

Selecting 'View' from the 'Look' menu provides you with an indication of the current state of the four input channels. If a logging session is in progress, a letter 'L' will also be displayed (see 'During Logging', section 2.3).

Order of channels:

Chan.1 Chan.2   Chan.3 Chan.4

New Values will normally be displayed every second, so this mode may be used as a type of digital meter.
The ON/CLEAR key will escape back to the 'Look' menu.

3.6 CHOOSING A FILE

f1300 sk1f1345   sk2 f1450

Choosing a 'File' from the 'Look' menu will display a list of filenames recorded, either in internal memory or in a Datapak, In this example, five filenames are shown.

If only one file name is shown in this menu, then either only one file is stored in memory or logging is still in progress. You can't look at other files until the current logging session has stopped.

To select which file you wish to examine, move the cursor to the file name and press 'EXE', or just use the initial letter if it is unique (this menu works just like all the others, although its contents will change depending on what is stored in the logger's memory).

The filenames are presented in the same order as they were recorded. If there are more files stored than will fit on to the screen, use the UP or DOWN cursor Keys to scroll through the menu.


4 DUMPING THE RESULTS

Printer Computer File Change

Selecting 'Dump' from the main logging menu will enable transfer of any recorded logging sessions to either a printer or an external computer. (Details of compatible hardware can be found in appendix C). Note that dumping cannot be performed whilst logging is still in progress.

File change : If there is more than one file stored in the logger's memory, you can choose which file is to be dumped by selecting 'File change' - this works in the same way as the 'Look' function - see section 3.6. If you do not select a file, the one dumped will be the last one recorded, or whichever file was dumped or looked at most recently.

Copying files: To copy logging files from internal RAM to a Rampak or Datapak, or a Rampak to a Datapak please refer to COPY INSTRUCTIONS in the Organiser manual.

Selecting 'Printer' will give you a further menu:

Tabular   Graphical

4.1 TABULAR FORMAT

Selecting 'Tabular' from this menu will provide a listing of all the records for the chosen logging session in a paged tabular format. The length of the page can be adjusted, if required, using the 'Config' option from the main logger menu (see section 5.2), The maximum, minimum and average values for each logged channel will be printed at the end of the table.

4.2 GRAPHICAL FORMAT

Selecting 'Graph' will print a simple graphical output of results. The graph is printed 'sideways' along the paper, with the time axis running along the length so very long logging sessions can be plotted if required.

If there is a fault with the printer during printing, an error message may appear. Check that:

  1. The printer is switched on and 'on line';
  2. It has not run out of paper;
  3. The paper has not jammed.

Transfer of data can be halted by pressing the ON/CLEAR key. but remember that some printers have large input buffers so that printing may not stop immediately. Turn off the printer if you require an immediate stop.

4.3 OUTPUT TO A COMPUTER

Text Binary  

Selecting 'Computer' from the Dump' menu allows transfer of logging results to an IBM-compatible personal computer. You will need the optional disk which contains the necessary transfer software. The first screen display is as shown on the previous page [above].

Choosing Text will output a text file (ASCII format), i.e. in a readable tabular form which is similar to the printer output. The PC file will have the same name as the filename in the logger, with the extension ".rtx".

Choosing 'Binary' will output a binary file (extension '.lbn') which cannot be read directly but can be transferred, using the utility on the disc, to Lotus 1-2-3 readable spreadsheet records (file extension '.wks'), which can be read by a number of commercially available spreadsheet packages. Once loaded into a spreadsheet, further graphical and statistical analysis can be undertaken.

For large data files, the binary transfer is up to ten times as fast as the text transfer.

Details of the format of the binary (.lbn) files are provided on the disk for those wishing to interface the data to their own programs.

Further information on file transfer and conversion appears with the disk software.


5 CONFIGURING THE SYSTEM

Time Print Baud  Quiet Request

Choosing 'Config' from the main menu allows you to set up various logging parameters.

5.1 SETTING THE TIME

Reset time :   13:59:34 16Aug89

Use 'Time' to check or reset the actual time of the day and date. The main 'Organiser' menu also provides a 'TIME' function but this cannot be accessed while a logging session is in progress. The 'Config' time option allows setting of the time in a more convenient way. Just overtype the figures with new values and press 'EXE' when the time and date are shown correctly. The month can be changed using the appropriate letter keys, more than once if necessary. If you press ON/CLEAR, the time will not be reset at all and will remain at its previous value (it will not lose the seconds that have passed while you were looking at the screen).

Time cannot be changed while logging - That would really confuse the system!

5.2 SETTING THE PRINTER

Epson Psion  

Choosing 'Epson' will configure the logger to download any 'Epson-compatible' printer with a RS232 serial input (more details in appendix E). The 'Psion' option will allow the use of the Psion printer if, but the logger module will have to be disconnected from the Organiser before connection to the printer. The logger cannot download to a parallel printer unless a serial to parallel converter is used.

Selecting paper length :

Lines per page   (20-120)? 66

After selecting the printer type, you can change the default sheet length for neat formatting of results. You should leave extra lines for the heading of each page output and for top and bottom margins-standard printout paper is 66 lines tong, so between 50 and 60 lines per page is a good selection, 66 lines is the default.

5.3 QUIET OPERATION

Enable Disable   beep during log

Selecting 'Quiet' from the 'Config' menu will display this short menu, which enables you to choose whether or not you require the logger to emit a 'beep' every time it takes a record. Press 'E' or 'D' as required.

5.4 LOGGING ON REQUEST

Enable Disable   log-on-Request

Selection of 'Request' from the 'Config' menu enables logging records to be taken at times other than the regular intervals defined by the 'Period' option. Press 'D' or 'E' as required. Note that you cannot activate this mode while logging is in progress - you must stop the current session, enable log-on-request, then start a new one.

Having enabled this option, there are different ways of actually requesting a record to be taken at any time.

If the logger is in the 'awake' mode (i.e. it has not 'gone to sleep' between records being taken), you need to select 'View' from the 'Look' menu (or V from the main menu will also work) - this is the screen which will normally be shown while logging with request mode selected.

19.5°C L 1134mV  2098mV R unused

The letter 'R' indicates the request mode. To take a record, simply press the 'R' key. A reading will be taken immediately:

log being taken 

The 'Look' menu will be displayed automatically after taking the reading.

19.5°C L 1134mV  2098mV R unused

5.5 REMOTE LOGGING

As an alternative to pressing the 'R' key for a log-on-request, pins 2 and 4 of the side connector can be shorted together momentarily, (see appendix B). As long as the organiser has been turned off, or timed out and turned itself off, a log will be taken as for log-on-request in section 5.4.


6 DELETING FILES

PACK FULL  

When the logger's internal memory, or the Datapak, becomes full, this message will appear on the screen when you try to start a new session. You will need to erase some old unwanted files before proceeding (but see overleaf concerning Datapaks).

Erase One file   or All files

Press 'O' for one file, or 'A' to delete all files to erase the infernal memory or the Datapak. Confirmation will be sought before deleting ell the files. If 'One file' is chosen, you must then decide which one to erase:

f1300 sk1 f1345  sk2 f1450

Selection is made in the usual way with the cursor keys or the initial letter.

Delete 'myfile'  (size120) Y/N?

When you have selected the file to erase, confirmation of you intentions will be sought. The indicated size may help in determining whether the deletion will be sufficient to begin your new session. The value given is

(Number of records) × (Number of channels active)

or, if log-on-request mode is active,

(Number of records) × (number of channels active + 1)

Pressing 'Y' to this prompt will check with a further 'are you sure?' before deleting the file. Please note that there is no way of recovering the erased data once deleted.

DATAPAKS: Deletion of files on Datapaks is possible but no space can be regained - the space can only 'reformatted' which needs the optional 'Formatter'- see chapter seven of the 'Psion Organiser II' operating manual.

RAMPAKS: Deletion of files in Rampaks is possible and will free all the space for re-use immediately.


7 SWITCHING OFF

The logger will automatically switch off after about five minutes if no keys are pressed, if you wish to switch off immediately, however, press the ON/CLEAR key repeatedly until you reach the main 'Organiser' menu :

LOGGER FIND SAVE DIARY CALC PROG

(Note however that if a logging session is still in progress, you will not be allowed to access to this menu - use the 'Stop' option from the main logger menu first).

Having reached this menu, press 'O' (for Off) to turn the organiser off.


Warranty

Digitron's SF10 module, software, probes and accessories are warranted against faulty workmanship and materials for 12 months from the date of purchase.

During the warranty period any defective instrument will be repaired, or replaced at our discretion. This warranty does not cover damage or failure resulting from misuse or accident.

Modification, adjustment or any alteration with the internal arrangement of the instrument shall absolve us from any liability in respect of the instrument.

Any instrument to be repaired should be forwarded to us carriage paid and at the owner's risk. A brief description of the fault should be included.

Please Note: The Psion Organiser II is covered by Psion Plc manufacturers warranty. Any Organisers to be repaired should be sent to Psion Plc at Psion House, Harcourt Street, London W1H 1DT, U.K.


APPENDIX A

DATALOGGER SPECIFICATION
Number of input channels4
Maximum Number of Records For A Single File
Internal RAM1 channel only(models XP and LZ)9,120
1 channel only (model LZ64) 25,000
4 channels (models XP and LZ) 2,280
4 channels (model LZ64) 6,250
128K Datapak1 channel only(models XP, LZ & LZ64) 60,000
Maximum Number of Logging Sessions (Files)90
InputWhen taking reading4.7 MΩ
ImpedanceOther times4.70 KΩ
Battery LifeActive use, or logging in seconds40 hours typical
Logging to RAM at 1 record/minute200 days typical
Operating Temperature0-50°C
Dimensionsincluding Psion Organiser excluding probes212×78×30 cm
Input Connections180° 5-pin DIN sockets; a separate serial port
is located on the side of the SF 10 module
 
 
PROBE SPECIFICATIONModelSensorRange
TemperatureTHSFThermistor-20°C to +100°C
 TKSFLType K Thermocouple-40°C to +160°C
 TKSFHType K Thermocouple-40°C to +960°C
 TKSFL-S*Type K Thermocouple-40°C to +160°C
 TKSFH-S*Type K Thermocouple-40°C to +960°C
PressureP5SF**Semi-Conductor Transducer0 to 1000 mbarG
Relative HumidityR5SFCapacity0 to 100% RH
VoltageVSF*** 0 to 2500 mV
 
Cont.ModelResolutionSystem Accuracy
 THSF0.1°C+/- 1.5%
 TKSFL0.1°C+/- 1%
 TKSFH0.1°C+/- 0.5%
 TKSFL-S*0.1°C+/- 0.25%
 TKSFH-S*0.1°C+/- 0.25%
 P5SF**1mbar+/- 0.5%
 R5SF0.1% RH+/- 3%
 VSF***1mV+/- 0.1%
 

* These models allow a variety of Type K Thermocouple plug-in probes to be used and the accuracies quoted for these models account for instrument and Type K interface accuracies only, as different classes of sensors can be used.

** Model P5SF has a multi-turn potentiometer located on top of the instrument to allow for zero control. The connection required for the push-fit plastic tubing is 3mm I.D.

*** Model VSF has no sensor, thus the accuracy quoted is that of the instrument alone.

PLEASE NOTE: All quoted accuracies with the exception of models TKSFL-S, TKSFH-S and VSF relate to the total system accuracy of instrument, probe and sensor.


APPENDIX B

ELECTRICAL CONNECTIONS

Input Connections

All four sockets accept sensor inputs using 5-pin DIN plugs.

Side socket 1 is a special 5 pin socket for connection to either a PC, printer or a 'log on request' remote triggering contact.

Side socket 2 is for an optional mains adapter.

Optional leads are available to drive printers or send data to a remote computer.

DIN plug connections for Logger Board - View from outside end of logger module.

Channels 1-4

3 o o 1 o o 5 o 4 2

Pin 1 - 0v
Pin 2 - Signal in (0-2500 mV)
Pin 3 - Vref. out (2550 mV)
Pin 4 - +5V out, max current 100mA
Pin 5 - 5V out, limited current (see GE SolidState Intersil ICL 7660 data)

Side Channel 1

1 2 3 o o o o o 4 5

Pin 1 - TXO
Pin 2 - Remote trigger
Pin 3 - RXD
Pin 4 - Ov
Pin 5 - DTR


APPENDIX C

OPERATION OF STANDARD 'ORGANISER' FUNCTIONS

LOGGER FIND SAVE

Because of the complexity of the software embodied in the logger design, there are a few effects on the normal operation of the 'Organiser'.

Conversely, use of the 'Organiser' in its normal way can in some cases effect the performance of the logger.

  1. The ALARM function is disabled while the logger software is in use and any alarms which are preset when a logging session is commenced will be cleared. This to avoid the chance of alarms interfering in any way with the precise timing of logging intervals.
  2. The SAVE and FIND functions can be used in the normal way, and records can be intermixed with logger records in both internal memory and Datapak. However, note that a very large number of records, either in internal memory or on a Datapak may cause the logger to be much slower at finding and displaying recorded values.
  3. The built-in programming language OPL may be used as normal. The only point to note is that certain OPL procedure names are used by the logger software and therefore these names should not be used by other OPL programs. A list of these names is given in appendix D. Additionally, the filename 'LPARAMS' is reserved for use with the logger (as well as any filenames used (or logged data) so do not try to create or open any files with these names. Files of logged data cannot be accessed safely by OPL.

APPENDIX D

INPUT CONVERSIONS FROM OPL

The function which reads the analogue-to-digital converter in the logger module is available for use in your own OPL programs, as long as the logger software Datapak is plugged in and 'booted'. This function is named 'CONVERT%' and its use is detailed below.

However, please note that the logger software uses certain OPL procedure names other than this, and these names should therefore be avoided. Inadvertent use of these names could cause a system crash, since many of them call machine-code routines (see appendix D of the 'Psion Organiser II' operating manual).

The procedures that cannot be used all have short names and are:

mnin$bd edfdgt
ssmf ds dugadw
s1dp dc lkfbff
ddcf id inghch
dhfp$e$ fnrrpp
tswu endpk

The two procedures which can be used are LOGGER and CONVERT%.

LOGGER will run the entire logger software package, as though it were called from the top-level menu as normal.
CONVERT% is called with a parameter STATUS$ which describes the input status of the four channels (i.e. temperature, millivolts etc.,) STATUS$ should be a string of four digits, e.g. "3100" where each digit represents the input status of the corresponding channel:

0: Unused, no conversion
1: Thermocouple, 160°C
2: Thermocouple, 960°C
3: Thermistor
4: Humidity
5: Millivolts
6: Pressure, millibars
7: Binary value (0-1 023 bits)

CONVERT% returns a pointer to set of four words (two bytes each) for the converted values for each channel. Note that if the status value is 4 or less (temperature or humidity) the value pointed to will be 10 times the actual value (this avoids using floating point values for temperatures like 45.7°C).

A typical usage might be:

pointer% = convert%:("3050") temp1 = peekw(pointer%)/10.0 mvolts = peekw(pointer% + 4)

which would set the variable 'temp1' to the temperature of the thermistor (status 3) fitted to channel one, and set the variable 'mvolts' to the input voltage (status 5) on channel three. Channels 2 and 4 would not be converted.

A value of $D000 (-12288) in the data block signifies an overrange or unconnected input.


APPENDIX E

CONNECTION TO EPSON PRINTER OR PC

The TX' line (pin 1 of the 5-pin socket on the side of the SF10) should be connected to pin 3 of a 25-way D type plug. The 'RX' line (pin 3 of the 5-pin socket) should be connected to pin 2 of the D type plug. The 'Ov' line (pin 4 of the 5-pin socket should be connected to pin 7 of the D type (CTS), and pins 20, 6 and 8 of the D type plug should be linked. To attach this cable to a PC, insert the D type plug in a female-female "null modem".


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