Redpost RPC-80 Manual de usuario
RPC-80
Playback unit
Manual 2 – Configuration
2
CONTENTS
GENERAL DESCRIPTION......................................................................................... 3
ENTERING CONFIGURATION SECTION................................................................. 3
GENERAL OPERATION ............................................................................................ 4
THE MAIN MENU....................................................................................................... 6
GENERAL FORMAT SETUP.................................................................................. 6
PU CALCULATION SETUP.................................................................................... 9
MONITOR SETUP................................................................................................ 11
RPC-80 SETUP.................................................................................................... 13
FULL LIST SETUP ............................................................................................... 15
PRINTER SETUP ................................................................................................. 16
EXTERNAL LINK SETUP..................................................................................... 17
"DIALOG" LANGUAGE ..................................................................................... 19
DATA TRANSFER TO PERSONAL COMPUTER ............................................ 19
FIRMWARE UPDATE ....................................................................................... 19
FINISHED SETUP : EXIT ..................................................................................... 20
3
GENERAL DESCRIPTION
Using the configuration section you can tailor the operation of the RPC-80 playback
unit to suit your exact requirements. When you have made your chosen settings you
return to the normal operating mode and the normal simplicity of control.
These instructions for configuration are offered in a separate manual because it is
not necessary for everybody involved with the day to day operation of the RPC-80 to
be familiar with them. This manual assumes that you are reasonably familiar with the
normal operation of the RPC-80 as described in Manual-1.
The RPC-80 is supplied in a "default" configuration with many of the features
described in this manual turned off. It is perfectly possible to continue to use the
playback unit in that form but the extra features, once set up correctly, can extend
the usefulness of the whole monitoring system.
The setting section allows you to control and adjust some features such as the clock
without entering the configuration section. This section is described in Manual-1.
ENTERING CONFIGURATION SECTION
The configuration section is protected by a simple password system that is designed
more to prevent inadvertent operation than to deny access to a determined person.
To enter the configuration section, first enter the setting section in the normal way by
switching on and holding down any button until the opening display of time and date
is over. This is described in more detail in Manual-1.
Choose SET CLOCK and then RESET DATE AND TIME. Change the year number to the
password number in just the same way that you would set the year. The clock and
calendar will not be disturbed by this but, if you have set the correct password
number, you will move into the configuration section. The password number is 1991.
The first display asks you to please read this manual before continuing and it is
important that you should at least have this manual ready to refer to before starting
to change any settings.
4
GENERAL OPERATION
The display and the buttons
The general principle behind the controls of playback unit is covered in Manual-1 and
repeated here with an extra section on setting letters for such things as channel
names.
The two line display tells you what is going on or asks you a question using the top
line. The bottom line is used to label the buttons. Not all the buttons are labelled
every time. If a button does not have a label then pressing it will have no effect.
Every time you press a button you hear a short beep to confirm the action. The
buttons are covered to make them splash-proof and so you should press them firmly.
If you do not hear the beep then you may not have pressed the button hard enough.
Some displays have two things to tell you at once and they do this by alternating two
displays: both on the top line. One will be the main display and will be shown first
and for longer than the secondary display. Any buttons will be labelled on the bottom
line as usual.
Some displays have too much information to fit onto one or two lines. In this case
both lines are given over to the main display and two right pointing arrows show you
that there is more to follow on the secondary display. If there are any buttons on this
type of display they can only be on the secondary display.
Menus & repeating buttons
Sometimes the display shows you one of a list of options and you can move forward
and backward through the list using the buttons. This is called a menu. The centre
and right hand buttons are both labelled MORE (i.e. more options available) but with
right and left pointing arrows to show the direction of movement through the list. If
you hold either of these buttons down it will repeat its action so that you can step
through the list quite fast. When you are stepping forward and you reach the last
item on the list your next step will be to the first item. Similarly when stepping
backward the list loops round from the first to the last item. The left hand button,
meanwhile, is labelled OK and you press this button when the option you want to
select is showing on the display.
Whenever a menu is shown for the first time the menu option showing will be the
current setting of that particular parameter.
Setting numbers
Sometimes the display shows you a number that you can change. An example would
be the day of the month. The first time the number is shown there will be two buttons
labelled OK and CHANGE. Press OK if you do not need to change the number at all,
otherwise press CHANGE. If you opt to change the number, a flashing cursor appears
under the first digit of the number and the centre and right hand buttons are labelled
"-" (minus) and "+" (plus). The minus button reduces the number while the plus
button increases it. If you hold down either of these buttons it will repeat its action.
The left hand button is labelled DIGIT OK and you press this button each time a digit
is correct. The cursor then moves to the right, under the next digit.
5
When all the digits have been adjusted the display changes again to the one with
two buttons labelled OK and CHANGE. This gives you a chance to change your mind
if you have made a mistake. If everything is correct press OK.
When changing the digits you will notice that only numbers that make sense in any
particular situation are possible. For example, you will not be able to set the date to
the 38th of the month.
Setting letters
Sometimes the display shows you a name that can consist of letters and numbers
that you can change. An example would be a channel name. The method of setting a
name is very similar to that for numbers described above.
The first time the name is shown there will be two buttons labelled OK and CHANGE.
Press OK if you do not need to change the name at all, otherwise press CHANGE. If
the name has not been set up before you will be shown a blank. There will always be
inverted commas ("...") or square brackets ([...]) to show you where the name will
appear and how long it can be.
If you opt to change the name, a flashing cursor appears under the first character of
the name and the centre and right hand buttons are labelled "-" (minus) and "+"
(plus). The minus button moves backward through the alphabet while the plus button
moves forward. If you hold down either of these buttons it will repeat its action. The
left hand button is labelled OK> and you press this button each time a character is
correct. The cursor then moves to the right, under the next character.
Only the numbers 0 to 9, a blank or space, a full stop (.), an oblique stroke (/) and
uppercase letters A to Z are offered as you move through the alphabet with the
minus and plus buttons. If the name is shorter than the maximum size allowed then
you should leave the remaining characters as spaces and step through each one
with the OK> button.
When all the characters have been adjusted the display changes again to the one
with two buttons labelled OK and CHANGE. This gives you a chance to change your
mind if you have made a mistake. If everything is correct press OK.
6
THE MAIN MENU
The various parts of the configuration section are grouped under the headings of the
main configuration menu. These menu headings are used as the headings for the
manual sections that follow.
GENERAL FORMAT SETUP
This section covers the general format of the printed text, graphs and display.
SELECT LANGUAGE allows you to choose the language that will be used for all the text
and displays. The language you choose comes into use at once and applies to all
the monitors used with this playback unit. Some of the older 100 Series PU monitors
are programmed with French language text and displays. When these monitors are
used with the RPC-80 they produce text and displays in the language set here by the
SELECT LANGUAGE menu.
SELECT DECIMAL POINT offers a choice of two number display formats using the dot
(99.9) or the comma (99,9) to separate the integer part from the fractional part of the
number. No separators are offered between the thousands. The chosen format
applies to all printed output, displays and pre-processed data output on the External
Link.
SET GRAPH FORMATS leads you into the settings for all the graph variables and
introduces the idea of user formats.
User formats
The RPC-80 is supplied with all the format details pre-set to standard values and you
do not need to change any item that you are happy with or that does not apply to
your installation. Just press the OK button when you are shown an item and it will
remain as it is. Remember that when you are first shown an item the display will
show the current setting or value of that item.
PU user
FORMAT FOR PU USER sets up the graph format for use with PU monitors.
Choose from the following units:-
For temperature channels; ºC or ºF.
For pressure channels; bar, lb/in2 or kg/cm2.
The chosen units apply to all printed output, displays and pre-processed data output
on the External Link and apply to all PU monitors used with this playback unit. The
older 100 Series PU monitors were programmed with various units as requested by
customers at the time of purchase. When these monitors are used with the RPC-80
they produce all output in the units set here by the UNITS menu.
Choose the starting point of the temperature and pressure graph scales.
Choose the size of the graph major division steps for the temperature and pressure
graph scales.
7
For maximum clarity and ease of interpreting the graph you should choose the
starting point and step sizes from the numbers 0, 1, 2, 5, 10, 20, 50 etc. The starting
point can be a negative number but the step size must be positive.
The total span of each scale will depend on the step size you choose and the
number of major divisions that fit onto a page. This depends on the graph style (see
below) and the paper size you are using. Remember that the scales run across the
shortest dimension of the page.
Choose the graph style.
You can choose inch or metric sizes with major graph divisions of one inch or 20
millimetres. Fewer major divisions will fit onto the page with the inch size but the
graph will have greater resolution and therefore show slightly more detail.
You can also choose the type of grid that is printed as a background to the graph.
The standard grid with major divisions and tenths accurately divides each grid
square into tenths and makes the graph easier to interpret. Turning the grid off
completely will result in slightly faster graph printing in most cases.
Head space correction
Monitors that measure pressure in cans and bottles use a pressure sensor inside the
instrument that connects to the container via a quick release coupling and a fine
flexible tube. This inevitably causes a slight increase in volume which slightly
disturbs the pressure in the container. If the theoretical volume of the head space of
the container is known and entered into the RPC-80 then the unit can make a first
order correction for the error. The pressure sensor connections must be cleaned out
after each run so that the pipe and coupling are empty if this error correction is to
operate correctly. The error is only significant when head space volume is less than
about 20 millilitres. The maximum correction allowed will increase the recorded
pressure by 5%. You may choose not to make this correction if you use many
different sizes of container and print all the results with one RPC-80.
HEAD SPACE CORRECTION? allows you to choose whether to make the correction.
HEAD SPACE VOLUME allows you to set the theoretical volume in millilitres (same as
cubic centimetres).
The correction will be applied to printed output, displays and pre-processed data
output on the External Link from the pressure channel of all 200 & 300 series PU
monitors used with this playback unit. If you choose to make this correction then the
head space volume will be printed on the results page with the pressure channel
results.
8
Channel names
Monitors with more than one channel are shown on the graph with several traces
identified by numbers. It is helpful to be able to give the channels names as well as
these numbers. Channel 1 should always be used in PU monitors for the
temperature of the product being pasteurised and so this channel could perhaps be
named "PRODUCT". The second channel could be used to measure the water spray
temperature in the pasteuriser and so could be named "SPRAY". These names
appear on the printed results and help to make them easier to interpret.
SET CHANNEL NAMES lets you set up names for the three possible channels of the PU
monitor. The names can have up to 15 characters (letters or numbers). Channels 1
and 2 are temperature channels; channel 3 is the pressure channel. When used with
monitors having fewer than three channels the extra names are ignored. The names
you set apply to all PU monitors; you cannot set different names for individual
monitors.
Note. Channel 3s name is always used for the pressure channel. The older 100
Series RPT-122 pressure monitor has only two channels. The pressure channel is
channel 2 and will use trace No 2 on the graph but will use the name you set here for
channel 3.
After you have set up the graph format for the PU monitor user you will be returned
to the SET GRAPH FORMATS display where you can exit this part of the setting section
by pressing the CANCEL button. If you continue by pressing the OK button you can
make further changes to the formats.
Leaving Graph Formats section
After you have set up the graph format for the PU monitor user you will be returned
to the SET GRAPH FORMATS display where you can exit this part of the setting section
by pressing the CANCEL button. If you continue by pressing the OK button you can
make further changes to the formats.
All the graph format settings are printed on the Status Report for the RPC-80. See
Manual-1.
9
PU CALCULATION SETUP
This section covers the selection of PU calculation constants and of the PU Cut-off
temperature.
Pasteurisation units
Experiments on mixed populations of the common brewery contaminants have
shown that at temperatures over about 50ºC there is a ten-fold increase in kill rate for
every 7ºC increase in temperature. For example, if the time required to kill a
population of contaminant cells at 60ºC is found to be 5 minutes then if the
temperature were to be increased to 67ºC the time required would be only 0.5
minutes. The Z Value is defined as the increase in temperature required to produce
a ten-fold increase in kill rate. The Z Value in this case is therefore 7ºC.
For beer the Pasteurisation Unit (PU) has been defined (arbitrarily) as the biological
destruction observed when beer is held for one minute at a temperature of 60ºC.
This temperature, where 1 PU per minute is achieved, is known as the Base Value:
60ºC in this case. The same definition of the PU is often used for soft drinks and
other beverages but, where there is a possibility of spore-forming bacterial
contamination being present, very much higher temperatures are required for
pasteurisation and so other definitions are in use outside the brewing industry.
Experiments have shown that Pasteurisation Units are additive in their effect in
situations where the temperature is changing such as in the tunnel pasteurisation
process.
If you select STANDARD PU CALCULATION then the Base Value will be set to 60ºC and
the Z Value to 7ºC. (If the temperature units have been set to Fahrenheit then the
Base value will be set to 140 ºF and the Z Value to 12.5 ºF.) These are the normal
settings for beer production.
If you select CUSTOM PU CALCULATION then you will be able to set up any Base Value
and Z Value that you require. Settings will depend on conventional practice in
various industries.
The PU calculation that you choose will apply to all PU monitors that use this RPC-
80 playback unit.
PU cut-off temperature
At temperatures below about 50ºC it is doubtful that any significant pasteurising
effect is achieved even though from a strictly mathematical point of view the correct
PU total could still be obtained, given enough time in the pasteuriser. For this reason
is it desirable to set a temperature level below which no PUs are added to the total.
This is known as the PU Cut-off temperature.
The PU Cut-off temperature is initially set to 50ºC (122 ºF) but you can set any
temperature that you require. Higher settings will give a more conservative picture of
total PU achieved.
The Cut-off temperature that you choose will apply to all PU monitors that use this
RPC-80.
10
Dual channel monitors
It is possible to set up different PU Cut-off temperatures for channel 1 and channel 2
on dual channel monitors. This can be useful when setting up a pasteuriser and
when comparing the effect that changes in the Cut-off temperature have on total PU
achieved.
It is also possible to turn off the PU calculation on channel 2 of a dual channel
monitor. Where the second channel is monitoring pasteuriser spray temperature
there is no requirement to calculate the PU total achieved and the lack of PU figures
make the results easier to read. You will be asked the question PU ON CHANNEL 2?
with buttons marked YES and NO for your reply.
The PU calculation and Cut-off that you choose are printed on the Status Report for
the RPC-80. See Manual-1.
100 & 300 Series PU monitors
The PU calculation and Cut-off temperature that you choose will apply to all PU
monitors that use this RPC-80 playback unit. This means, for the 100 & 300 Series
monitors, that their own internal settings for PU calculation and Cut-off will be over-
ridden. You may therefore get different results when you print out the 100 Series
monitor on the older RPC-42 printer/charger or display the results on the monitor's
own display. The advantage of having all the control in the RPC-80 playback unit is
that it is very easy to maintain a common standard across all the monitors in an
installation. Changes in that standard are easily handled without individual
modifications to all the monitors.
PU cut-off and the graph
The PU Cut-off temperature is printed on the graph as a dashed line so that it is easy
to see the area where the temperature trace exceeds the Cut-off and where PUs are
being added to the total.
In the case of two different Cut-off levels being set, they cannot both be shown on
the graph when the RPC-80 is used with a multi-channel monitor. However, the
channel 1 Cut-off will be shown when the RPC-80 is used with a single channel
monitor. If there is no PU calculation on channel 2 then the Cut-off will only be shown
on the graph if channel 1 is active.
Otros manuales para RPC-80
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