PTW MULTIDOS User manual

User Manual
MULTIDOS
RS232 Interface
D177.131.2/0 2003-07 Di/Se

MULTIDOS
RS232 Interface
2D177.131.2/0
For your notes

MULTIDOS
RS232 Interface
Contents
D177.131.2/0 3
Contents
1 FOR YOUR SAFETY 4
2 GENERAL 5
3 INTERFACE CONFIGURATION 5
4 PRINCIPLES OF COMPUTER COMMUNICATION 5
5 GENERAL TELEGRAMS 6
5.1 Device Identification 6
5.2 Keyboard 6
5.3 Basic Device Settings 6
5.4 Controlling a Measurement 6
5.5 Error Codes 6
5.6 Status telegrams 7
6 BRIEF DESCRIPTION 8
7 APPLICATION DUAL CHANNEL DOSEMETER 9
7.1 Basic Settings 9
7.2 Data telegrams 10
7.3 Correction Telegrams 11
7.4 Calibration Factors 11
8 APPLICATION MULTI CHANNEL DOSEMETER 12
8.1 Basic Settings 12
8.2 Data telegrams 12
8.3 Correction Telegrams 13
8.4 Calibration Factors 13
9 APPLICATION CONSTANCY CHECK 14
9.1 Basic Settings 14
9.2 Data telegrams 15
9.3 Correction Telegrams 16
9.4 Calibration Factors 16
9.5 Errors 16
10 APPLICATION LINEAR ARRAY LA 48 17
10.1 Basic Settings 17
10.2 Data telegrams 17
11 APPLICATION AFTERLOADING 20
11.1 Basic Settings 20
11.2 Control Telegrams 20
11.3 Data telegrams 21
11.4 Calibration Factors 22

MULTIDOS
RS232 Interface
For your Safety
4D177.131.2/0
1 For your Safety
−This document is a supplement to the PTW-
MULTIDOS User Manual and is valid only in
conjunction with that manual.
−The safety statements given in both user
manuals are applicable and must be ob-
served.
−In addition to these safety statements,
please note that devices connected to the
interface described in this manual must fulfill
the requirements of the IEC standard 60950
or IEC 61010-1 (EN 61010-1).
PTW-FREIBURG
Physikalisch-Technische Werkstätten
Dr. Pychlau GmbH
Lörracher Str. 7
79115 Freiburg
GERMANY
Phone: [phone]
Fax: [phone]
[e-mail]
www.ptw.de

MULTIDOS
RS232 Interface
General
D177.131.2/0 5
2 General
To get used to the MULTIDOS serial communica-
tion, we recommend to use a terminal program like
the Microsoft-Windows HyperTerminal.
3 Interface Configuration
MULTIDOS RS232 interface:
Baud rates: 4800, 9600, 19200,
38400 (recommended)
Code: 8 data bits
Stop bit: 1 stop bit
Parity: none
If the COM port of your personal computer has a 9
pin D connector (standard IBM layout), use a PTW
cable L178012 (2m), L178026 (5m) or T22373/K67-
30.
If it has a 25 pin connector, use a gender changer
additionally.
Pin assignment:
Pin MULTIDOS signal
2 TxD (out)
3RxD(in)
4-
5SGND
6-
7CTS(in)
8 RTS (out)
Pins 4 and 6 are internally connected. By this, an
external DTR signal may be returned as DSR to the
external device.
Either RTS/CTS hardware handshake or no hand-
shake may be used.
4 Principles of Computer
Communication
Between MULTIDOS and the connected PC, data is
exchanged by means of sequences of ASCII char-
acters which are concluded by the characters CR
(carriage return, hexadecimal 0D) and LF (line feed,
hexadecimal 0A). This sequences are called tele-
grams. The CRLF end mark is omitted in all tele-
gram descriptions. For all communication, a strict
ping pong principle must be observed: after sending
a telegram to the MULTIDOS, the PC program must
wait for the answer from MULTIDOS, before it may
send a new telegram.
NOTE
In this text, the character • is used to depict a
space character contained in a telegram.

MULTIDOS
RS232 Interface
General Telegrams
6D177.131.2/0
5 General Telegrams
These telegrams are valid for all MULTIDOS applications.
5.1 Device Identification
Telegram Description Response
PTW Read device information. x.xx is the firmware version, u describes the ra-
diological unit
MULTIDOS•x.
xxu
SER Read MULTIDOS serial number SERxxxxxx
5.2 Keyboard
Telegram Description Response
KxDisable or reenable the MULTIDOS keyboard. Parameter x: 0 = disabled, 1
= enabled
Kx
5.3 Basic Device Settings
Telegram Description Response
LxSet/Read language setting. Parameter x: E = Englisch, D = German Lx
Idddd Set/Read interval time. Parameter dddd: 0006 up to 9999 Idddd
AaSet/Read the MULTIDOS application. Parameter a: A = Afterloading, C =
Constancy Check, D = Dual Dosemeter, M = Multi Channel, L = Linear
Array.
Wait 5 seconds after sending Aa
Aa
Aquit Restart the current application. Wait 5 seconds after sending Aquit Aquit
BRbbbbb Set/Read baud rate. Parameter bbbbb: 04800, 09600, 19200, 38400 BRbbbbb
5.4 Controlling a Measurement
Telegram Description Response
STA Equivalent to <STA> key STA
INT Equivalent to <INT> key INT
RES Equivalent to <RES> key RES
HLD Equivalent to <HLD> key HLD
NUL Equivalent to <NUL> key. Response NUL or E06 is send after 28 seconds NUL
MxSet/Read measuring mode. Parameter x: 0 = Dose, 1 = Doserate Mx
S Read measurement status.
Valid values of parameter sss: RES, STA, HLD, INT, RUN, NUL, ERR
Ssss
5.5 Error Codes
Error code Description
E01 Unknown command or illegal parameter
E02 Command in wrong context (STA for doserate measurement, etc.)
E03 Command not allowed at the moment (MULTIDOS is in a menu)
E06 Error during zeroing
E07 Answer could not be sent (transmission buffer full)
E09 Error during write to EEPROM
E10 Parameter out of limits

MULTIDOS
RS232 Interface
General Telegrams
D177.131.2/0 7
5.6 Status telegrams
Telegram Description Response
SC Calibration status of the actual unit of measurement, involving all components
contributing to data acquisition, as there might be a reference or monitor
chamber.
Parameter x: 0 = any of the components involved is uncalibrated, 1 = all used
components are calibrated.
x = 0 conforms to a „uncalibrated“ message on the display
SCx
Note:
An electrical measurement will have the calibration status 1, even if the radiological calibration factors stored in
MULTIDOS are marked „uncalibrated“ (= set to default), as long as the electrical calibration is marked to be
„calibrated“.
Telegram Description Response
SD Device status. iiiii is a five digit decimal number, whose bits, when converted
to binary representation, signal the following condition when the bit is set:
.0 ÞMULTIDOS display is not accessible (command timeout)
.1 ÞMULTIDOS display is not accessible (automode timeout)
.2 Þelectrical calibration possible
.3 ÞSet1 of application dual channel is write protected
.4 Þradiological unit is Roentgen
.5 Þreference temperature for air density correction is 22°C
.6 ÞHV error
.7 ÞME 48 is connected to MULTIDOS
.0 is the least significant bit
SDiiiii
Note:
If bit .0 or .1 is set, the display is not operational. The firmware still continues to execute and to measure, but all
display operations are omitted, the display will no longer be refreshed. The measured values, available by the D
telegrams, are still correct.
Telegram Description Response
SE Reads the error number. ddddd is a five digit decimal number, whose bits,
when converted to binary representation, signal the following error condition,
if the bit is set:
.0 Þerror at calculation of measurement multipliers
.2 Þerror during data acquisition
.4 ÞEEPROM corrected (non critical)
.6 ÞEEPROM error (critical)
.0 is the least significant bit
SEddddd
Note:
There will never be more than one bit set at once, since MULTIDOS checks all error sequentially. Because of
that, each error condition corresponds to a discrete value of ddddd.
ddddd is always equal to 00000, as long as the response to the S telegram is not SERR. SE is designed to give
a more detailed information of the error type.

MULTIDOS
RS232 Interface
Brief Description
8D177.131.2/0
6 Brief Description
Perform steps 1 to 5 in the given sequence to set up the MULTIDOS and read out measured data.
Step 1: physical setup
Connect the RS232 cable to the desired COM port of your personal computer. Switch the MULTIDOS on
and set it manually to the desired application. Set up the following items: unit, absolute or relative readings,
measuring mode, interval time, baudrate. Note that MULTIDOS will reawake in this configuration, when it is
switched on again.
Step 2: open communication
Start the communication program on your PC. The program must be set up correctly!
Telegram Response Description
PTW MULTIDOS Correct response signals proper communication setup and that MULTIDOS
is ready for communication. See note 1
AaAa Set/Read the MULTIDOS application. Parameter a: A = Afterloading, C =
Constancy Check, D = Dual Dosemeter, M = Multi Channel, L = Linear
Array. Sending A reads the current application, sending A with parameter
changes the application.
SER SERxxxxxx Correct response signals the MULTIDOS is ready to measure
Notes:
1. The answer must return within 3 seconds. The first seven characters of the response telegram must be
MULTIDOS (the response itself contains more characters). Repeat this telegram three times maximum, if
you do not receive the expected response or no response at all.
2. For all telegrams: if the expected response is not received, MULTIDOS is set up in a wrong way.
Step 3: zero adjustment
Telegram Description Response
NUL The response is sent at the end of the procedure after approx. 35 seconds max.
If zeroing fails, E06 is responded instead of NUL. Obey the warm up time and
the guidelines for zeroing.
NUL
Step 4: set up and start measurement
Telegram Description Response
Ixxxx Set the interval time between 6 und 9999 seconds (replace Parameter xxxx by
0006 to 9999). Only necessary to alter a previous setting.
Ixxxx
MxSet/Read MULTIDOS measuring mode.
Parameter x: 0 = Dose/Charge, 1 = Doserate/Current
Sending M reads the current mode, sending M with parameter changes the
mode.
Mx
STA Same effect as the <STA> key STA
INT Same effect as the <INT> key INT
Note: During a running measurement a new measurement may be immediately started by STA or INT.
Step 5: read measured values
Telegram Description Response
D Reads the measured values see application chapters in this manual
During serial communication, it is recommended to disable the MULTIDOS keyboard by the K0 telegram.
All MULTIDOS setup (used unit and measuring mode, reference used or not, etc.) can also be done by tele-
grams.
If MULTIDOS is running in menu mode, all telegrams with the exception of PTW will be responded by E03.

MULTIDOS
RS232 Interface
Application Dual Channel Dosemeter
D177.131.2/0 9
7 Application Dual Channel Dosemeter
Telegrams containing parameters alter a setting. If the parameter is omitted in the telegram, the actual setting is
returned. For clarification parameters are printed in italic.
Example: I0044 sets the interval time, Ireads the actual interval time and is answered by I0044.
7.1 Basic Settings
Telegram Description Response
PWxP Set/Read the password protection. Parameter x: 0 = clear protection, 1 =
Set protection. P is the password string as described in the MULTIDOS
User Manual
PWx
QxSet/Read the type of data readings on the display. Parameter x: 0 = abso-
lute values, 1 = relative values (channel 2 divided by channel 1)
Qx
Rxy Set/Read range settings. Parameter x: setting of channel 1. Parameter y:
setting of channel 2. Valid values of xand y: L = Low, H = High, - = keep
current setting.
Valid values of the response oand t: L or H. ois the setting of channel 1, t
the setting of channel 2
Rot
Rxy Set/Read range settings. Parameter x: setting of channel 1. Parameter y:
setting of channel 2. Valid values of xand y: L = Low, H = High, - = keep
current setting.
Valid values of the response oand t: L or H. ois the setting of channel 1, t
the setting of channel 2
Rot
SETsSet/Read the calibration set to be applied. Parameter s: 1 up to 5 SETs
SP Read the protection setting of the calibration data. Parameter p is a one
digit number, whose bits show the protection status: bit .0 is set = pass-
word protection is set, bit .1 is set = hardware protection is active
SPp
UxSet/Read unit of measurement. Parameter x: A = Ampere, S = Gy/s, M =
Gy/min, H = Gy/h
Ux

MULTIDOS
RS232 Interface
Application Dual Channel Dosemeter
10 D177.131.2/0
7.2 Data telegrams
7.2.1 Read measured values
The response to a data telegram consists of various fields, separated by semicolons. The fields contain pa-
rameters and text.
The response to the D telegram is:
Dm;ttttt.ns;sss;FL;O;L;M;±m.mmmE±ee;a;±m.mmmE±ee;a;·####.#;bbbbb
The measured values and resolution indicators are that of the actual measuring mode and are transmitted
channel 1 first, followed by channel 2. The ratio is always transmitted, even if absolute values are displayed
(see below).
7.2.2 Description of parameters
mActual measuring mode. Valid values: 0 ÞDose or Charge, 1 ÞDoserate or Current
ttttt.n Elapsed measurement time. Consists of seven characters. Small numbers are right justified,
with leading spaces. Parameter n can have the values of 0 or 5.
If the maximum measurement time of 64800 seconds is exceeded, OL••••• will be transmit-
ted.
sss Measurement status. Valid values: RES, STA, HLD, INT, RUN, NUL, ERR.
FL Global flags. A two digit number, whose set bits, when converted to binary representation,
signal the following error:
.0 Þany of both channels is overloaded at the moment
.1 Þmath error in any channel
.2 ÞMULTIDOS data acquisition error
.3 ÞMULTIDOS HVerror at the moment
.4 Þoverload in any of both channels since the start of a dose measurement
.5 ÞMULTIDOS HV error since the start of a dose measurement
.0 is the least significant bit
OOverload flags of the doserate / current measurement. One digit, whose set bits, when con-
verted to binary representation, signal the following errors:
.0 Þoverload in channel 1
.1 Þoverload in channel 2
LLatched overload flags of the dose / charge measurement. One digit, whose set bits, when
converted to binary representation, signal the following errors:
.0 Þoverload in channel 1 since the start of a dose measurement
.1 Þoverload in channel 2 since the start of a dose measurement
MMath error flags of the actual measurement mode. One digit, whose set bits, when converted
to binary representation, signal the following errors:
.0 Þmath error in channel 1
.1 Þmath error in channel 2
±m.mmm Mantissa of the measured value. This field consists of six characters. Smaller numbers are
right justified, with leading spaces. Positive numbers use a space character instead of the
minus sign.
If the limits of representation (±999.9E+20) are exceeded, +0L••• or -0L••• will be transmit-
ted, depending on the sign.
E±ee Exponent of the measured value. Two digit number, with leading zeroes if necessary. The sign
is always transmitted, either as + or -.
If the limits of representation are exceeded, •••• will be transmitted.
aResolution of the measured value. One digit. Valid values:
2 Þresolution below 1% (conforming to ** on the measuring screen)
1 Þresolution below 0.5% (conforming to *)
0 Þresolution is 0.5% or better

MULTIDOS
RS232 Interface
Application Dual Channel Dosemeter
D177.131.2/0 11
•####.# Ratio of measured value of channel 2 divided by the measured value of channel 1, given in
percent. The decimal point position is fixed. Smaller numbers are right justified, with leading
spaces. Positive numbers use a space character instead of the minus sign.
If the maximum representable ratio of ±9999.9 is exceeded, •####.# will be transmitted.
If one of the measured values exceeds it limits of representation, •----.- will be transmitted.
bbbbb Block check sequence of the response. This is a five digit number, representing a 16 bit un-
signed integer, with leading zeroes if necessary.
The block check sequence is calculated starting from the first character of the response up to
the character preceding bbbbb and must be equal to the value of bbbbb.
7.2.3 Read maximum value
The response to the DMc telegram is
DMc•m.mmE±ee
where c is the channel number (valid values are 1 or 2). The transmitted value is the maximum value of the
doserate / current measurement for the active unit (radiological or electrical) and actual measuring range of that
channel. The value is formatted in scientific notation.
7.2.4 Read Resolution
The response to the DRc telegram is
DRc•0.mmmE±ee
where c is the channel number (valid values are 1 or 2). The transmitted value is the resolution of the actual
measuring mode for the active unit (radiological or electrical) and actual measuring range of that channel. The
number of digits following the decimal point may vary from 1 to 3.
7.2.5 Measuring unit
Telegram Response
DU DUu
Reads the absolute unit of measurement of the active measuring mode. Possible values of u:
when MULTIDOS is set to radiological units: Gy Gy/s Gy/min Gy/h
when MULTIDOS is set to electrical units: C A
7.3 Correction Telegrams
Telegram Description Response
KSxSet/Read the correction setting. Parameter x: 0 = correction off, 1 = on KSx
KPpSet/Read the value of the atmospheric pressure p. p= 0500.0 … 1300.0 KPnnnn.n
KTtSet/Read the value of the ambient temperature t. t= 10.0 … 40.0 KTnn.n
KTR Read the setting of the reference temperature. Parameter x: 0 = 20°C, 1 =
22°C
KTRx
KD Read the calculated air density correction factor kD KDn.nnn
KKck Set/Read the overall correction factor kof channel c. k= 0.500 … 2.000 KKcn.nnn
7.4 Calibration Factors
Telegram Description Response
CRsFcf Set/Read the calibration factor fof channel cof set sCRsFccf
CRsNname Set/Read the name of set s. name is a string of 19 characters max. CRsNname
CRsTcid Set/Read the ID of channel cof set s. id is a string of 15 characters max. CRsTccid
CRsQqSet/Read the measuring quantity of set s. Parameter q: W = Dw, A = Ka, S
= Js
CRsQq
CRsUxUpdate (x= 1)/Read (no x) the result of the check sum protection of set sCRsUx
CRsBbbbbb Set/Read the block check value bbbbb of set sCRsBbbbbb

MULTIDOS
RS232 Interface
Application Multi Channel Dosemeter
12 D177.131.2/0
8 Application Multi Channel Dosemeter
Telegrams containing parameters alter a setting. If the parameter is omitted in the telegram, the actual setting is
returned. For clarification parameters are printed in italic.
Example: I0044 sets the interval time, Ireads the actual interval time and is answered by I0044.
8.1 Basic Settings
Telegram Description Response
UxSet/Read unit of measurement. Parameter x: A = Ampere, S = Gy/s, M =
Gy/min, H = Gy/h
Ux
RxSet/Read measuring range. Parameter x: L = range Low, H = range High Rx
SETsSet/Read the calibration set to be applied. Parameter s: 1 up to 5 SETs
8.2 Data telegrams
8.2.1 Read measured values
The response to the Dmima telegram is:
Dmima;m;ttttt.ns;sss;FL;lm;um;am;OOOO;LLLL;MMMM;Kbbbbb
The various fields contain the following information:
mi number of first channel to be read (01 … 12)
ma number of last channel to be read (01 … 12)
mactual measuring mode (0 = Dose, 1 = Doserate)
ttttt.n elapsed measuring time
sss actual measurement status. String of 3 characters
FL global measurement flags as Overload in any channel, HVerror, etc. Two digit number
lm number of maximum channel of group 1-6 (marked on display by ‘<‘). Two digit number
um number of maximum channel of group 7-12 (marked on display by ‘<‘). Two digit number
am number of absolute maximum channel (marked on display by ‘<<‘). Two digit number
OOOO overload flags of the doserate measurement of all 12 channels. Four digit number
LLLL overload flags of the dose measurement of all 12 channels. Four digit number
MMMM MathError flags of the actual measuring mode. Four digit number
Kmeasured values of all requested channels. See below
bbbbb block check value of the data telegram. Five digit number
The field Kconsists of (ma-mi+1) values of the following format: ±m.mmmE±ee;
8.2.2 Read Resolution
The response to the DRc telegram is
DRcc0.mmmE±ee
where cc is the channel number (valid values are 01 to 12). The transmitted value is the resolution of the actual
measuring mode. The number of digits following the decimal point may vary from 1 to 3.
8.2.3 Measuring unit
Telegram Response
DU DUu
Reads the absolute unit of measurement of the active measuring mode. Possible values of u:
when MULTIDOS is set to radiological units: Gy Gy/s Gy/min Gy/h
when MULTIDOS is set to electrical units: C A

MULTIDOS
RS232 Interface
Application Multi Channel Dosemeter
D177.131.2/0 13
8.3 Correction Telegrams
Telegram Description Response
KSxSet/Read the correction setting. Parameter x: 0 = correction off, 1 = on KSx
KPpSet/Read the value of the atmospheric pressure p. p= 0500.0 … 1300.0 KPnnnn.n
KTtSet/Read the value of the ambient temperature t. t= 10.0 … 40.0 KTnn.n
KTR Read the setting of the reference temperature. Parameter x: 0 = 20°C,
1 = 22°C
KTRx
KD Read the air density correction factor kD KDn.nnn
KKkSet/Read the overall correction factor k. k= 0.500 … 2.000 KKn.nnn
8.4 Calibration Factors
Telegram Description Response
CRsFccf Set/Read the calibration factor fof channel cc of set sCRsFccf
CRsIxSet/Read the ‘Is calibrated’ flag of set s.
Parameter x: 0 = uncalibrated, 1 = calibrated
CRsIx
CRsNname Set/Read the name of set s.
Parameter name: string of 19 characters max. (spacers allowed)
CRsNname
CRsTccid Set/Read the ID id of channel cc of set s.
Parameter id: string of 15 characters max. (spacers allowed)
CRsTccid
CRsDdd.mm.
yyyy
Set/Read the calibration date of set sCRsDdd.mm.
yyyy
CRsUxUpdate (x= 1)/Read (no x) the result of the check sum protection of set sCRsUx
CRsBbbbbb Set/Read the block check value bbbbb of set sCRsBbbbbb

MULTIDOS
RS232 Interface
Application Constancy Check
14 D177.131.2/0
9 Application Constancy Check
Telegrams containing parameters alter a setting. If the parameter is omitted in the telegram, the actual setting is
returned. For clarification parameters are printed in italic.
Example: I0044 sets the interval time, Ireads the actual interval time and is answered by I0044.
−If the unit is changed, the measurement is continued and the measuring values are re-calculated to the
new measuring unit.
−All telegrams that begin with X are only valid in XMODE. The XMODE is activated with XM1. If it is not ac-
tivated, you get E01 back as the telegram response.
It is only possible to select a set if the set is calibrated or if it is possible to calibrate the MULTIDOS or if the
MULTIDOS is in XMODE or if there is no calibrated set at all.
9.1 Basic Settings
Telegram Description Response
UxSet/Read unit of measurement. Parameter x: 1 = Ampere, 2 = Gy/s, 3 =
Gy/min, 4 = Gy/h
Ux
RxSet/Read range settings. 1: Range Low, 2: Range High Rx
SETsSet/Read the calibration set to be applied. Parameter s: 1 up to 5 SETs
V Checking whether Gray or Röntgen, 0 : Gray
1 : Röntgen
Vx
XMxx = 0: Switching of the extension mode
x = 1: Switching on the extension mode
XMx
XDxRead/Set the display mode
0: normal, 1: omit the renewing of the display
XDx

MULTIDOS
RS232 Interface
Application Constancy Check
D177.131.2/0 15
9.2 Data telegrams
The response to a data telegram consists of various fields, separated by semicolons. The fields contain pa-
rameters and text.
9.2.1 Description of parameters
cc Channel number, consisting of two characters. Valid values:
01 to 12or the channels 1 to 12
mActual measuring mode. Valid values: 0 ÞDose or Charge, 1 ÞDoserate or Current
uunit of measurement. Parameter x: 1 = Ampere, 2 = Gy/s, 3 = Gy/min, 4 = Gy/h
ttttt.n Elapsed measurement time. Consists of 7 characters. Small numbers are right justified, with
leading spaces. ncan take the values 0 or 5.
If the maximum measurement time of 64800s is exceeded, OL••• will be transmitted.
sss Measurement status. Valid values: RES, STA, HLD, INT, RUN, NUL, ERR.
FL Global flags. A two digit number, whose bits, when set to one, signal the following:
.0 Þany of all channels is overloaded
.1 Þmath error in any channel
.2 ÞMULTIDOS data acquisition error
.3 ÞMULTIDOS HVerror
.4 ÞMULTIDOS electrically uncalibrated
.5 ÞMULTIDOS electrically uncalibrated
±m.mmm
mmm
Mantissa of the measured value. This field consists of 9 characters. Smaller numbers are right
justified, with leading spaces. Positive numbers use a space character instead of the minus
sign.
If the limits of representation (±999.9E+20) are exceeded, +0L••• or -0L••• will be transmit-
ted, depending on the sign.
E±ee Exponent of the measured value. Two digit number, with leading zeroes if necessary. The sign
is always transmitted, either as + or -.
ma highest channel number for data transmission with DA telegram
Valid values: 01 to 12.
bbbbb Block check sequence of the response. This is a five digit number, representing a 16 bit un-
signed integer, with leading zeroes if necessary.
The block check sequence is calculated starting from the first character of the response up to
the character preceding bbbbb and must be equal to the value of bbbbb.
9.2.2 Data telegrams
Telegram Response
DA;ma DA;ma;ttttt.ns;m;u;Kbbbbb
Reads the measured values of channels 1to ma
Kcontains the measurement data and consists of ma parts:
FL;±m.mmmmmmE±ee;
Kcontains no channel numbers, the data is transmitted in the order from channel 1 to channel ma.
Telegram Response
D;cc D;cc;ttttt.ns;m;u;FL;±m.mmmmmmE±ee;bbbbb
Reads the measured value of a single channel.

MULTIDOS
RS232 Interface
Application Constancy Check
16 D177.131.2/0
9.3 Correction Telegrams
Telegram Description Response
C;xSet/Read Air Density Correction 0: Off 1: On C;x
CP;xxxx.x Set/Read nominal air pressure (500.0 <= p <= 1300.0), default: 1013.2hPa CP;xxxx.x
CT;xx.x Set/Read the temperature (10.0 <= T <= 40.0), default: 20/22°C CT;xx.x
CD Checking the correction factor temperture/air density without kQE CD;x.xxxx
CK;x.xxxx Set/Read Beam Quality Factor. (0.0000 < kQE <= 2.0000), default: 1.0000 CK;x.xxxx
9.4 Calibration Factors
Telegram Description Response
XR;s;cc;f Set/Read the radiological calibration factor for channel cc in set sXR;s;cc;±m.m
mmmE+ee
XRF;sSet/Read the flag for set sfor radiologically calibrated/uncalibrated
0: not calibrated, 1: calibrated
XRF;s;x
XRN;s;name Set/Read the name for set swith radiological calibration factors XRN;s;name
XRD;s;dd.mm
.yyyy
Set/Read the radiological calibration date for set sXRD;s;dd.mm
.yyyy
XRC;sRenew the check sum radiological calibration factor for set sXRC;s
9.5 Errors
Telegram Description Response
ERR Checking the error status flag of MULTIDOS
Bit0: MENU_ERROR
Bit1: ELCAL_ERROR
Bit2-7: not used
Bit8: RADCAL_ERROR Set 1
Bit9: RADCAL_ERROR Set 2
Bit10: RADCAL_ERROR Set 3
Bit11: RADCAL_ERROR Set 4
Bit12: RADCAL_ERROR Set 5
Bit13-15: not used
ERR;xxxxx

MULTIDOS
RS232 Interface
Application Linear Array LA 48
D177.131.2/0 17
10 Application Linear Array LA 48
Telegrams containing parameters alter a setting. If the parameter is omitted in the telegram, the actual setting is
returned. For clarification parameters are printed in italic.
Example: I0044 sets the interval time, I reads the actual interval time and is answered by I0044.
10.1 Basic Settings
Telegram Description Response
UxSet/Read unit of measurement. Parameter x: A = Ampere, S = Gy/s, M = Gy/min,
H = Gy/h
Ux
RxSet/Read setting of reference channel. Parameter x: 0 = without reference, 1 =
refer to reference chamber, 2 = refer to monitor signal
Rx
10.2 Data telegrams
The response to a data telegram consists of various fields, separated by semicolons. The fields contain pa-
rameters and text.
The format of the response to the Dcc and DA telegrams differs, depending if measuring against a reference
signal is set up or not.
10.2.1 Description of parameters
cc Channel number, consisting of two characters. Valid values:
01 to 47 for the LA 48 channels 1 to 47
R• for the reference channel, M•for the monitor signal
V1 addresses the channel which measures the 900 volts, V4 that to measure the 400 volts
mMeasuring mode. Valid values: 0 ÞDose or Charge, 1 ÞDoserate or Current
ttttt Elapsed measurement time. Consists of five characters. Small numbers are right justified, with
leading spaces.
If the maximum measurement time of 64800s is exceeded, OL••• will be transmitted.
sss Measurement status. Valid values: RES, STA, HLD, INT, RUN, NUL, ERR.
fFlags for a single channel. One digit, whose bits, when converted to binary representation,
signal the following errors when the bit is set:
.0 Þoverload in that channel
.1 Þmath error in that channel
.0 is the least significant bit.
FL Global flags. A two digit number, whose bits, when set to one, signal the following:
.0 Þany of all channels is overloaded (including reference or monitor, if used)
.1 Þmath error in any channel (including reference or monitor, if used)
.2 ÞMULTIDOS data acquisition error
.3 ÞMULTIDOS HVerror
.4 Þ900 volts error in ME 48
.5 Þ400 volts error for reference chamber
aResolution of the reference (chamber or monitor, whichever is used). One digit. Valid values:
2 Þresolution below 1% (conforming to ** on the measuring screen)
1 Þresolution below 0.5% (conforming to *)
0 Þresolution is 0.5% or better

MULTIDOS
RS232 Interface
Application Linear Array LA 48
18 D177.131.2/0
±m.mmm Mantissa of the measured value. This field consists of six characters. Smaller numbers are
right justified, with leading spaces. Positive numbers use a space character instead of the
minus sign.
Notes:
For channels 1 to 47 and if measurement against reference is used, this field may have the
„values“ >=1000 and <•5E-4
If the limits of representation (±999.9E+20) are exceeded, +0L••• or -0L••• will be transmit-
ted, depending on the sign.
E±ee Exponent of the measured value. Two digit number, with leading zeroes if necessary. The sign
is always transmitted, either as + or -.
For channels 1 to 47 and if measurement against reference is used, the exponent field will be
omitted. If the limits of representation are exceeded, •••• will be transmitted.
rSetting of the reference selection. Valid values: 0 = no reference, 1 = referred to reference
chamber, 2 = referred to monitor signal.
mi Number of that LA 48 channel having the smallest absolute value. Valid values: 01 to 47
ma Number of that LA 48 channel having the largest absolute value. Valid values: 01 to 47
bbbbb Block check sequence of the response. This is a five digit number, representing a 16 bit un-
signed integer, with leading zeroes if necessary.
The block check sequence is calculated starting from the first character of the response up to
the character preceding bbbbb and must be equal to the value of bbbbb.
10.2.2 Single channel data
Telegram cc Response Notes
Dcc 01 .. 47 Without reference: Dcc;m;ttttts;sss;±m.mmmE±ee;f;FL;bbbbb
01 .. 47 With reference: Dcc;m;ttttts;sss;±m.mmm;f;FL;bbbbb 1
R• or M• Dcc;m;ttttts;sss;±m.mmmE±ee;f;FL;a;bbbbb 2, 3
V1 or V4 Dcc;m;ttttts;sss;±m.mmmE±ee;f;FL;bbbbb 4, 5
Reads the measured value of a single channel.
Notes:
1. For LA 48 channels, when using a reference, the exponent field is omitted (rational number, as displayed on
the measuring screen)
2. DR• or DM• is only allowed if the corresponding reference is activated. Otherwise the response will be E02.
3. The response contains the resolution of the channel additionally
4. This values always have an exponent field, independent from the reference setting
5. In both measuring modes the value of the measured high voltage is responded
Examples:
1. The measuring mode may be doserate, the measuring status may be HLD, no reference used, the measured
value of channel 14 at the HLD-time may have been 27.7mGy/s, MULTIDOS may show a HVError, the HLD
state has been entered after 31 seconds.
The response to the D14 telegram will be D14;1;•••31s;HLD;••27.7E-03;0;08;43712
(the block check sequence is fictitious)
2. The measuring mode may be dose, the reference chamber may be used as reference, whose measured
value of -1.4µGy may have a resolution worse than 1%. An interval measurement may be started but the
HLD state has not yet been reached, the actual measurement time may be 21 seconds. The 900 volts of the
ME 48 may be out of limits.
The response to the DR• telegram will be DR•;0;•••21s;INT;••-1.4E-06;0;16;2;00413
(the block check sequence is fictitious)

MULTIDOS
RS232 Interface
Application Linear Array LA 48
D177.131.2/0 19
10.2.3 Data of all channels
Telegram Response
DA DAm;ttttts;sss;r;mi;ma;FL;[R]Kbbbbb
Reads the measured values of all channels simultaneously. Notes:
1. Ris an optional field, which is only transmitted when a reference is used. The [] are not transmitted, they
only depict the optional character of the field. It contains the measurement data of the activated reference
and consists of the following fields: ±m.mmmE±ee;f;a;
2. Kcontains the measurement data of the 47 channels and consists of 47 parts looking like this:
±m.mmm[E±ee];f;
If a reference is used, the exponent field is not transmitted.
Kcontains no channel numbers, the data is transmitted in the order from channel 1 to channel 47.
Length of the response (including DA, without CR LF):
with reference: (26 + 15 + 47 * 9 + 5) characters = 469 characters
without reference: (26 + 0 + 47 * 13 + 5) characters = 642 characters
10.2.4 Measurement resolution
Telegram Response
DRcc DRcc0.mmmE±ee
Reads the absolute resolution of channel cc. Notes:
1. This is the resolution of the active (displayed) measuring mode (mode 0 or 1)
2. Depending on the actual resolution, mmm consists of 3, 2 or 1 digit
3. The resolution is always given as an absolute value, even if measurement against reference is selected.
4. Channel numbers R• and M• are only valid, if measurement against reference is selected. Otherwise the
response will be E02.
Example:
For the unit of measurement Gy/min the resolution of channel 17 in mode 1 (= dose rate) may be 50µGy/min,
displayed as 0.05 mGy/min.
Therefore, in mode 1 the response to DR17 will be DR170.05E-03
10.2.5 Measurement unit
Telegram Response
DU DUu
Reads the absolute unit of measurement of the active measuring mode. Possible values of u:
when MULTIDOS is set to radiological units: Gy Gy/s Gy/min Gy/h
when MULTIDOS is set to electrical units: C A
If the radiological unit is Roentgen, replace Gy by R in the upper lines.

MULTIDOS
RS232 Interface
Application Afterloading
20 D177.131.2/0
11 Application Afterloading
Telegrams containing parameters alter a setting. If the parameter is omitted in the telegram, the actual setting is
returned. For clarification parameters are printed in italic.
Example: I0044 sets the interval time, I reads the actual interval time and is answered by I0044.
11.1 Basic Settings
Telegram Description Response
UxSet/Read unit of measurement. Parameter x: A = Ampere, S = Gy/s, M =
Gy/min, H = Gy/h
Ux
RxSet/Read measuring range. Parameter x: L = range Low, H = range High Rx
SETsSet/Read the calibration set to be applied. Parameter s: 1 up to 5 SETs
SETAaa Set/Read the status of the channels of the applied set. aa is a 2 digit decimal
number, whose set bits, when converted to binary representation, signal the
following status:
.0 Þchannel 1 of the rectum probe is active
.1 Þchannel 2 of the rectum probe is active
.2 Þchannel 3 of the rectum probe is active
.3 Þchannel 4 of the rectum probe is active
.4 Þchannel 5 of the rectum probe is active
.5 Þchannel of the bladder probe is active
.0 is the least significant bit
aa can take values from 00 to 63.
SETAaa
11.2 Control Telegrams
Telegram Description Response
NEW Reinitialize measurement NEW
NULE Read the channels (only active channels are considered) with erroneous results
during last zeroing. ee is a 2 digit decimal number, whose set bits, when con-
verted to binary representation, signal the following status:
.0 Þchannel 1 of the rectum probe was out of offset limits
...
.4 Þchannel 5 of the rectum probe was out of offset limits
.5 Þchannel of the bladder probe was out of offset limits
.0 is the least significant bit
ee can take values from 00 to 63.
NULee
NULLrRead the offset current limits for measuring range r
Limits (Ampere) in the data format ±m.mmmE±ee;
Data output: rectum probe channels 1 to 5, bladder channel
Example for measuring range Low:
NULLL•41.70E-12;•42.25E-12;•41.40E-12;•42.10E-12;•41.80E-12;•42.05E-12;
NULLrLimit
s
NULOrRead the offset current measured during last zeroing in measuring range r
Results (Ampere) in the data format ±m.mmmE±ee
Data output: rectum probe channels 1 to 5, bladder channel
Results for deactivated channels are 0.0
Example for measuring range Low with deactivated channel 1:
NULOL••0.00E-12;••0.60E-12;••0.50E-12;•-0.10E-12;••0.70E-12;••0.55E-12;
NULLOr-
Results