Precision -Photometer Operating instructions

CZIBULA & GRUNDMANN GMBH
Precision -Photometer
Operating instructions
Documentation-Version 3.04
Firmware-Version V3.xx
Date: 03.02.2009
Czibula & Grundmann GmbH ♦Reuchlinstr. 10-11 ♦10553 Berlin
Tel. +49 (0) 30 - 3456 0171 ♦ Email: info@photo-meter.com ♦ Fax +49 (0) 30 - 3456 0181
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Operating manual PHOTOMETER
CZIBULA & GRUNDMANN
Table of contents
1
2
Introduction .................................................................................................................. 4
Operation ...................................................................................................................... 4
2.1
Getting started........................................................................................................ 4
2.2
Basic key functions................................................................................................. 5
2.2.1
Range selection .............................................................................................. 5
2.3
Menu Settings ........................................................................................................ 6
2.4
User menu.............................................................................................................. 6
2.4.1
Calibrating reflectance, transmission .............................................................. 6
2.4.2
Instrument mode............................................................................................. 7
2.4.3
CALIB – User Calibration................................................................................ 7
2.4.4
Interface selection and settings....................................................................... 8
2.4.4.1
2.4.4.2
2.4.4.3
2.4.5
Parameters of RS232...................................................................................... 9
Parameters of USB......................................................................................... 9
Parameter of the IEEE488 interface .............................................................. 9
Measure settings .......................................................................................... 10
2.4.5.1
2.4.5.2
2.4.6
Integration time ............................................................................................ 10
Autorange loop rejection.............................................................................. 10
Display settings ............................................................................................ 10
2.4.6.1
2.4.6.2
Format of readings ....................................................................................... 11
Display speed ............................................................................................... 11
2.4.7
Service ......................................................................................................... 11
2.5
Analog output ....................................................................................................... 12
3
PC communication..................................................................................................... 13
3.1
Interfaces ............................................................................................................. 13
3.1.1
RS232 interface ............................................................................................ 13
3.1.2
IEEE488 Interface......................................................................................... 13
3.1.3
USB interface ............................................................................................... 14
3.2
Commands........................................................................................................... 15
3.2.1
Formatting reading........................................................................................ 15
3.2.2
Request a reading ........................................................................................ 16
3.2.3
Request the version...................................................................................... 16
3.2.4
Range handling ............................................................................................ 17
3.2.4.1
3.2.4.2
3.2.4.3
3.2.4.4
3.2.4.5
3.2.5
3.2.6
3.2.7
3.2.8
3.2.9
Get minrange / maxrange............................................................................. 17
Set / Get range.............................................................................................. 17
Switch into a more insensitive range ........................................................... 18
Switch into a more sensitive range .............................................................. 18
Autorange..................................................................................................... 19
Remote Mode ............................................................................................... 19
Local Mode ................................................................................................... 20
Enable external trigger.................................................................................. 20
Enable internal trigger................................................................................... 20
Measure mode.............................................................................................. 21
3.2.9.1
3.2.10
3.2.11
3.2.12
3.2.13
3.2.14
Set unit in user mode.................................................................................... 21
User calibration factor................................................................................... 22
Factory calibration factor............................................................................... 22
Integration time ............................................................................................. 22
Get serial number ......................................................................................... 23
Display settings ............................................................................................ 23
3.2.14.1
Display Mode........................................................................................... 23
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3.2.14.2
3.2.14.3
3.2.14.4
3.2.15
Ieee488 ........................................................................................................ 25
3.2.15.1
3.2.15.2
3.2.16
Ieee488 device address ............................................................................ 25
Ieee488 service request (SRQ)................................................................. 25
Other commands .......................................................................................... 26
3.2.16.1
3.2.16.2
3.2.16.3
3.2.16.4
3.2.16.5
3.2.16.6
3.2.16.7
3.2.16.8
4
5
6
7
Display Speed .......................................................................................... 23
Display Format......................................................................................... 24
Control the display................................................................................... 24
Save Params ............................................................................................. 26
Get timestamp .......................................................................................... 26
Device reset.............................................................................................. 26
Factory Reset ........................................................................................... 26
Autosend .................................................................................................. 27
Autorange loop rejection.......................................................................... 27
Underrange threshold............................................................................... 28
Command set ........................................................................................... 28
Calibration .................................................................................................................. 29
Electrical fuses........................................................................................................... 29
Warranty ..................................................................................................................... 29
Technical specifications............................................................................................ 30
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Operating manual PHOTOMETER
CZIBULA & GRUNDMANN
1
Introduction
The precision photometer designed by CZIBULA & GRUNDMANN GMBH is a photometer built on latest
available technology. It can be used miscellaneous, e.g. as luxmeter or photo current meter (2.4.1). Its
modularity is joined by simple and intuitive operation. Dependent on the version of the instrument, it
fulfills class A or class L requirements of DIN 5032-7.
With its display range of 0.0001 mcd up to 200 cd and respectively 0.0001 lx up to 200 klx, divided into
7 decade ranges, all measurement tasks may be performed with highest accuracy. The signal
processing with a fast amplifier combined with a voltage to frequency converter grants a 16 bit wide
digitizing for all signal frequencies which are a multiple of 10 Hz. (others on request). The connected
sensor (photocell) is operated in short circuit, which leads to the highest achievable linearity over the
whole display range.
The illuminated LC - display uses inverse technology for visualization of the readings, which is ideal
for the use in a black laboratory.
The instrument is equipped with a serial interface (RS 232) to be used in automated systems. An
IEEE488-interface or USB are available on demand. All functions of the photometer may be controlled
by interface.
The firmware inside the photometer can be upgraded by the use of the serial interface.
2
Operation
If the temperature of the photometer is below the surrounding temperature (due to transport etc) it
should not be switched on immediately. Moisture may condense inside and lead to malfunction and/or
electrical damage.
For high accuracy measurements the instrument should be left switched on at least one hour to get
into thermal equilibrium.
2.1
Getting started
Before switching on the instrument, the sensor should be plugged into the socket located on the front
panel of the instrument. If the sensor is equipped with a thermostat an additional socket is beside the
one for the sensor.
Please connect the instrument with mains voltage, using the mains cable delivered with the
instrument. A host computer may be connected via serial interface, USB or IEEE4888. The connectors
are found on the rear of the instrument.
Now the instrument may be switched on. After an initialization process the LED found above the keys
will change its color from red to green, the photometer is ready to operate now. The display will
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Operating manual PHOTOMETER
CZIBULA & GRUNDMANN
immediately start to show readings. If a user factor has been set previously, it will be used for all
readings.
2.2
2.2.1
Basic key functions
¦ manual range selection
key ∆ or key ∇
¦ enable auto-range
simultaneously keys ∆ and ∇
¦ select menu / enter
key set
¦ back without saving
key back
Range selection
After switching on the instrument, it operates in automatic range switching mode, indicated by * behind
the reading. If you would like to operate it in a fixed range, please press the keys ∇ or ∆. The
autorange indicator * will be deleted. The current range will be maintained, but it will not change
automatically if an over- or underrange condition is detected.
If an over- or underrange condition is detected, the display indicates them by showing 'O' or ‘U’ behind
the reading. To change the range one of the keys ∇ or ∆ must be pressed. The range is changed,
when the key is pressed.
To switch back to automatic range selection, please press and release the keys ∇ and
simultaneously.
∆
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2.3
Menu Settings
All other settings of the instrument are menu-driven. The operation is simple :
Press the 'SET'-key. The reading in the display is replaced by a
1. press set to enter menu
2. press ∇∆ to select menu
option
menu system. To change the displayed menu option, the keys
∆∇ are used. To select a menu option or to confirm a setting,
press the 'SET'-key.
3. confirm
settings
pressing set
by
Depending on the function it may contain a sub-menu with other
4. press ∇∆ to select
submenu
possibilities and settings which also may be selected by ∆∇ and
or
be done by the keys ∆∇. If the setting is done to the desired
SET-key. If a number has to be entered/changed, this can also
adjust value by pressing
∇∆
5. confirm
settings
pressing set
by
value it must be confirmed by pressing the SET-key or aborted
by the BACK-key. Pressing key BACK in the highest menu level
will be affect to start measuring and showing the value.
6. discard changes or
decrease menu level by
pressing BACK
2.4
User menu
The changing of a setting over the menu will be stored directly after pressing the SET-key. Unlike the
changing of setting over the interface will be stored not directly, but after sending the command
SAVEPARAMS.
2.4.1
Calibrating reflectance, transmission
In Instrument mode rho/tau you can calibrate the actual photo current to 100%. After pressing the
SET-key the photometer will measure the photocurrent ten times, calculates the average value and
stores it in the internal eeprom.
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2.4.2
Instrument mode
The Photometer supports several modes in displaying of the measured readings. The mode can be
changed by menu selection or the selected interface.
table 1: measuring modes
Menu index
Menu item
Description
Calibration required
1
Lux
Illumination [lx]
x
2
Iph
Photo current [A]
-
3
Lumen
luminous flux [lm]
x
4
cd/m2
Luminous density [cd/m2]
x
5
User
Can be defined by user [user]
x
6
Volt
Output voltage of the analog amplifier [V]
-
7
Counts
Counter reading over the integration time
-
[couns/integration time]
8
rho/tau%
Reflectance, transmission [%]
x
9
Candela
Luminous intensity [cd]
x
*
The modes marked with x demand a calibration of the photometer together with the associated
photometer head.
*
The calibration in mode candela requires a calibration in mode illumination before.
The mode output voltage and counter reading is implemented for service.
After changing the mode the instrument will display the readings immediately.
If the mode requires a calibration and is not factory calibrated, the message “Not calibrated” will shown
on the display.
2.4.3
CALIB – User Calibration
The instrument is calibrated in the factory. Sometimes you will need a user defined factor to be
multiplied with the reading.
If you select CALIB, you will see the calibration mode (user/factory) and the instrument mode for a
short time. Then it will showed the current factor on the right half of the display and on the left half the
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Operating manual PHOTOMETER
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current reading multiplied by this factor. This will be the new value displayed during continuous
measurement.
By pressing key ∇∆ the factor will be decreased or increased. If holding key ∇ or ∆, the change of the
factor will be speed-up.
CALIB
à
∇∆
à
Mode
When holding key set you can select the quantity of changing the factor. In slow mode the position
after decimal point is changed, in fast mode the position before the decimal point is
increased/decreased by 1. You can change the mode everytime.
Press the SET-key shortly to save the factor or BACK to discard changes.
2.4.4
Interface selection and settings
By default the instrument is equipped with a RS232 serial interface. On demand also an IEEE488
/GPIB- or an USB- interface are available. The selection of the active interface is done by the I/Omenu in the setup (IntFace).
The availability of the submenu for Ieee488 and USB depends on the equipment.
IntFace
à
RS232
↓
IEEE488
optional
↓
USB
optional
By selecting (set) an interface it will be activated and the corresponding submenu will be showed. If
and IEEE488 modul is installed, it can be used parallel to one of the serial interfaces (RS232/USB).
Note that USB and RS232 cannot be used parallel.
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2.4.4.1 Parameters of RS232
IntFace
IntFace
à
à
RS232
RS232
à
à
Baudrate
Parity
à
57600
à
38400
à
19200
à
9600
à
4800
à
2400
à
1200
à
none
à
even
à
odd
2.4.4.2 Parameters of USB
The USB-Interface has fixed settings. By using a virtual comport the settings are 57600 8N1.
2.4.4.3 Parameter of the IEEE488 interface
It is just necessary to assign a device address to the photometer. The default address is 02. To
change the address select the submenu IntFaceàIEEE488àDevNo and press keys ∇∆ to change it.
Press SET to store or BACK to discard changes.
IntFace
à
IEEE488
à
DevNo
à
1
up to
à
30
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2.4.5
Measure settings
2.4.5.1 Integration time
In the submenu Int-Time you can change the integration time in the range of 10ms up to 400ms with a
resolution of 1ms. Be careful if you measure AC-signals. The integration time has to be a multiple of
the period of your signal. See the examples below.
f[Hz]
T[ms]
Integration time [ms]
50
20
20,40,60 … 400
60
16,66
100,200,300,400
100
10
10,20,30 … 400
Pressing the key ∆ rather ∇ shortly will increase or decrease the integration time by 1ms. Hold the key
for fast changes.
à
Measure
à
Int-Time
10
up to
à
400
à
on
à
off
2.4.5.2 Autorange loop rejection
à
Measure
2.4.6
AR Loop
Display settings
Display
à
à
Format
Speed
à
Exponent
à
Float
à
Slow
à
Medium
à
Fast
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2.4.6.1 Format of readings
You can select the format of readings between exponential (e.g. 1.435E-06 A) and fixed-point with SIunits (e.g. 1.435 uA). This setting only affects the display. For the PC-interface you can change the
settings by command (3.2.1) (default setting is exponential format).
2.4.6.2 Display speed
By changing the display update speed a better clearness of display first of all in short integration times
will be reached. Therefore several measurements are made, depending on the integration time, and
the average is calculated before the result will be displayed.
Setting
Refresh rate [1/s] (approx.)
Slow
1
Medium
2
Fast
4
This setting doesn`t affect the PC-Interface. Always the actual value will be transmitted.
2.4.7
Service
This function can be used for diagnostics and service. Additional the photometer can be restore
factory settings. This doesn`t affect the factory calibration.
Service
à
Info
à
service infos
à
FactRst
à
No
à
Yes
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2.5
Analog output
The photometer may be equipped with an analog output. It delivers a voltage between 0 and 10 V
which may be measured with any voltmeter which has an input impedance of more than 100 kΩ. The
automatic range switching should be disabled when using the analog output.
Note that the output voltage follows the input photometric current in its time responds up to the
amplifiers cut-off frequency. This frequency is about 400Hz in the most sensitive range and will
increase in insensitive ranges.
range
Imax [A] (10V)
ILSB [A]
0
1*10
-3
1*10
-8
1
1*10
-4
1*10
-9
2
1*10
-5
1*10
-10
3
1*10
-6
1*10
-11
4
1*10
-7
1*10
-12
5
1*10
-8
1*10
-13
6
1*10
-9
1*10
-14
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3
PC communication
3.1
Interfaces
3.1.1
RS232 interface
All commands are sent as ASCII-string which must be terminated by the terminator CR (0x10).
Photometer
Pin No.
PC
Rx (In)
2
Tx (Out)
Tx (Out)
3
Rx (In)
CTS (In)
7
RTS (Out)
RTS (Out)
8
CTS (In)
GND
5
GND
To connect the instrument to a computer, just use a standard 9-pole (DB9) serial cable with a 1:1
connection.
During handling a command the RTS-Line of the RS232-Interface is cleared, otherwise it is set.
3.1.2
IEEE488 Interface
SPOLL-Register:
Name
Ready
Bit
0
Error
1
Data available
Measure running
Reserved
Reserved
Service_Request
Reserved
2
3
4
5
6
7
Description
1 - Ready
0 - Busy
1 - last command finished not correctly
0 - last command finished correctly
1 - measure data are ready to enter
1 – measure running
1 - Service Request
-
As EOS (End of String) identification the character CR (carriage return) and LF (line feed) followed of
the EOI is sent when transmission finished.
Bit0 in the SPOLL-Register indicates the receive readiness. During handling a PC-command the bit is
cleared, if the instrument is ready for new commands it is set.
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3.1.3
USB interface
To use the USB interface you have to install the provided windows-driver. After first connection of the
photometer to the PC a message „new hardware detected“ will showed. You have to specify the path
where the driver is located.
After successful installation the instrument is showed in the system control. You can use the provided
DLL or the Windows software to communicate between PC and photometer (3.2).
The USB-Interface must be activated in the menu. You have to select between RS232 and USB.
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3.2
Commands
The command set described below is available in all interfaces. To be compatible with older
photometer firmware command sets (firmware versions 1.xx) you can activate the compatibility mode
(3.2.16.8).
The changing of a setting over the menu will be stored directly after pressing the SET-key. Unlike the
changing of setting over the interface will be stored not directly, but after sending the command
SAVEPARAMS.
3.2.1
Formatting reading
The formatting of the reading can set up:
Position
Get
Answer
1234567890123
0000000001111
MEAFORMAT f
Ack / Error
Get
Answer
MEAFORMAT?
f
Content
Description
f
Bitmask Formatting (decimal):
Bit0 – Range (1=on, 0=off)
Bit1 – exponent or float (1=exp, 0=float)
Bit2 – hide unit (1=hidden, 0=visible)
Bit3 – fixed digits (e.g. 1.5400E-6)
Bit4 – Rangestat-Mode0
Bit5 – Rangestat-Mode1
2 Bit Rangestat-Mode :
00
01
10
11
- O=Overrange, U=Underrange, no
underrange if range=maxrange
- O=Overrange, U=Underrange, underrange
if range=maxrange
- AR = Autorange, OVR=Overrange,
UR=Underrange, no underrange if
range=maxrange
- reserved
Example 1 (exponent, unit, rangestate Mode 0,
show range) in mode Iph:
1.54E-06 A 2 U
Formatting: 3 (0b00 0011)
The default setting is 2 (rangestat Mode 0, exponent)
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3.2.2
Request a reading
To request a reading from the photometer the following command has to be sent to the instrument:
The numbers of positions after decimal point depend on the amplitude of the amplifier and the
integration time. It can vary of two up to five. If the formatting setting (3.2.2) is set on fixed len the
unused digits will be filled with ‘0’.
Position
Get
Answer
(exp)
Answer
(float)
1234567890123
0000000001111
?
MEA
MEASURE
v.vvvvvE+ww uu r sss
f.ffff uu r sss
Content
Description
v.vvvvv
E
+
ww
uu
r
sss
Mantissa
Exponent, always "E"
Sign of Exponenten, "+" or "-"
Exponent
unit (e.g. lx, A)
range
State
U
O
Underrange
Overrange
The reading depends on the measure mode.
3.2.3
Request the version
To request the firmware version of the instrument the following command has to be sent:
Position
1234567890123
0000000001111
Get
VER
VERSION
*IDN?
Answer
C&G Photometer HWhh Vx.xx w MMM TT JJJJ HH:MM:SS
Content
Description
hh
x.x
w
MMM TT JJJJ
HH:MM:SS
Company + type of instrument
Hardware Version
Firmware Version
(Softwareoption)
Date of build
Time of build
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3.2.4
Range handling
3.2.4.1 Get minrange / maxrange
The number of ranges can vary. Normally there are 7 (0..6) ranges. On demand there are more than 7
ranges. With this command you can get the minimum and maximum ranges.
Position
Get
Get
Answer
1234567890123
0000000001111
MINRANGE?
MAXRANGE?
r
Content
Description
r
range
3.2.4.2 Set / Get range
To set or get the range the following command has to be sent. By setting the range manually the
autorange will be disabled.
Position
Set
Answer
1234567890123
0000000001111
SETMB r
Ack / Error
Get
Answer
GETMB
Content
Description
r
rs
Current range (e.g. 0...6)
OVR Overrange
AR
Autorange enabled
UR
Underrange
MBr rs
Additional there two more commands to switch and get the range (without status information).
Position
Set
Set
Answer
1234567890123
0000000001111
RNG r
RANGE r
Ack / Error
Get
Get
Answer
RNG?
RANGE?
Content
Description
r
range
r
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Operating manual PHOTOMETER
CZIBULA & GRUNDMANN
3.2.4.3 Switch into a more insensitive range
This command switches the range into a more insensitive range. If the most insensitive range (MR0) is
still set, the command will not be executed. By setting the range manually the autorange will be
disabled.
To set the range the following command has to be sent:
Position
1234567890123
0000000001111
Set
Answer
RANGEDN
Ack / Error
3.2.4.4 Switch into a more sensitive range
This command switches the range into a more sensitive range. If the most sensitive range (e.g. MR6)
is still set, the command will be deleted. By setting the range manually the autorange will be disabled.
To set the range the following command has to be sent:
Position
1234567890123
0000000001111
Set
Answer
RANGEUP
Ack / Error
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Operating manual PHOTOMETER
CZIBULA & GRUNDMANN
3.2.4.5 Autorange
To let the photometer handle the best range automatically you can activate the autorange.
To set the autorange the following command has to be sent:
Position
set
answer
1234567890123
0000000001111
AUTO x
Ack / Error
get
answer
AUTO?
x
enable
disable
answer
AUTO1 (obsolete, don’t use anymore)
AUTO0 (obsolete, don’t use anymore)
x
Content
Description
x
0 – disable autorange
1 – enable autorange
If there is no parameter x the autorange will
be enabled.
In case of unfavourable input signal (high dynamic, oscillation) it can happen, no range can be
detected. A message will be displayed on the display (AR failed). In this case you can enable the
autorange loop rejection (3.2.16.6).
3.2.5
Remote Mode
You can lock the keys on the front of the photometer in remote mode.
The following command has to be sent:
Position
1234567890123
0000000001111
Set
Answer
REMOTE
Ack / Error
The instrument will be switched in remote mode automatically after receiving any command over the
Ieee488 interface or an Ieee488 trigger (DET) occures.
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3.2.6
Local Mode
You can unlock the keys on the front of the photometer in local mode.
The following command has to be sent::
Position
1234567890123
0000000001111
Set
Answer
LOCAL
Ack / Error
You can press the GotoLocal-key (back) to go to local-mode.
3.2.7
Enable external trigger
The device is in standby. When the command measure (3.2.1) received, the device starts measuring.
When finished the reading will be send. Note that you have to set the valid range before execute the
trigger. If autorange is enabled and the current range is not valid, the autorange routine will switch the
range until a valid range was found. When finished the reading will be sent.
To trigger the photometer by the PC you have to enable the external Trigger by sending the following
command:
Position
1234567890123
0000000001111
Get
Answer
TRIG ON
Ack / Error
If the photometer is equipped with a IEEE488-Interface the measurement will be started if you send a
Group Execute Trigger (DET). After measurement finished the reading will be stored in the transmit
buffer. You have the collect the reading when the Data available SPOLL-Bit is set (3.1.2).
3.2.8
Enable internal trigger
To enable the continuous measurement you have to send the command:
Position
1234567890123
0000000001111
Set
Answer
TRIG OFF
Ack / Error
The internal trigger is activated after start the device automatically.
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CZIBULA & GRUNDMANN
3.2.9
Measure mode
The format of readings (only interface) depends on the format settings.
Position
set
set
answer
1234567890123
0000000001111
MODE x
UNIT x
Ack / Error
get
get
answer
MODE?
UNIT?
X
Content
Description
x
Mode index (see table 1 on page 7)
3.2.9.1 Set unit in user mode
Position
Set
Answer
1234567890123
0000000001111
USER sssss
Ack / Error
Get
Answer
USER?
sssss
Content
Description
sssss
Unit of reading in user measure mode, max. 5
characters
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CZIBULA & GRUNDMANN
3.2.10 User calibration factor
Position
Set
Answer
1234567890123
0000000001111
FACTOR m f
Ack / Error
Get
Answer
FACTOR? m
f / Error
Content
Description
m
f
measurement mode (3.2.9)
Set:
Factor (expontential or float format) e.g.
1.546E-9 or 0.9889
Get: always expontential
3.2.11 Factory calibration factor
You can get the factory calibration factor by sending the command:
Position
Get
Answer
1234567890123
0000000001111
GETFFACT? m
f / Error
Content
Description
m
f
measurement mode (3.2.9)
always expontential
3.2.12 Integration time
You can set and get the integration time with the following command (see 2.4.5.1):
Position
Set
Set
Answer
1234567890123
0000000001111
TI t
INTTIME t
Ack / Error
Get
Get
Answer
TI?
INTTIME?
t
Content
Description
t
Integration time [ms] (10ms … 400ms)
Page 23
Operating manual PHOTOMETER
CZIBULA & GRUNDMANN
3.2.13 Get serial number
The serial number is stored in the internal EEprom and can be read by the command:
Position
1234567890123
0000000001111
Get
Answer
SN?
ssss
Content
Description
ssss
Serial number
3.2.14 Display settings
3.2.14.1 Display Mode
The measure mode to show in the display can be changed by the keys (2.4.2) or by command.
Position
Set
Answer
1234567890123
0000000001111
DISPMODE m
Ack / Error
Get
Answer
DISPMODE?
m
Content
Description
m
Mode index (see table table 1 on page 7)
3.2.14.2 Display Speed
The measure speed to show in the display can be changed by the keys (2.4.6.2) or by
command.
Position
Set
Answer
1234567890123
0000000001111
DISPSPEED s
Ack / Error
Get
Answer
DISPSPEED?
s
Content
Description
s
1 – fast
2 – middle
3 - slow
Page 24
Operating manual PHOTOMETER
CZIBULA & GRUNDMANN
3.2.14.3 Display Format
The measure format to show in the display can be changed by the keys (2.4.6.1) or by
command.
Position
Set
Answer
1234567890123
0000000001111
DISPFMT f
Ack / Error
Get
Answer
DISPFMT?
s
Content
Description
f
Formatting bitmask (3.2.1)
3.2.14.4 Control the display
Position
Display On
Display
Off
answer
1234567890123
0000000001111
DISPON
DISPOFF
Ack / Error
Page 25
Operating manual PHOTOMETER
CZIBULA & GRUNDMANN
3.2.15 Ieee488
3.2.15.1 Ieee488 device address
Position
Set
Answer
1234567890123
0000000001111
I488ADR a
Ack / Error
Get
Answer
I488ADR?
a
Content
Description
a
Ieee488 device address [1..30]
3.2.15.2 Ieee488 service request (SRQ)
The behaviour of the service request bit in the SPOLL-Register can be configured. If it is
enabled, the service request bit is set after a measure reading is ready to enter.
Position
Set
Answer
1234567890123
0000000001111
I488SRQ a
Ack / Error
Get
Answer
I488SRQ?
a
Content
Description
a
Ieee488 Service Request
0 = Off
1 = On
Page 26
Operating manual PHOTOMETER
CZIBULA & GRUNDMANN
3.2.16 Other commands
3.2.16.1 Save Params
The changing of a setting over the menu will be stored directly after pressing the SET-key. Unlike the
changing of setting over the interface will be stored not directly, but after sending the command
SAVEPARAMS.
Position
Set
Answer
1234567890123
0000000001111
SAVEPARAMS
Ack / Error
3.2.16.2 Get timestamp
The internal timer has a resolution of 1ms. It will run after switching on the device. After approx. 50
days the timer will begin at 0.
Position
Get
Answer
1234567890123
0000000001111
GETTICKS
t
Content
Description
t
Timestamp [s] (e.g. 861.023 s)
3.2.16.3 Device reset
To reset the device and all components you can send this command. If you have an ieee488Interface you can execute a device clear.
Position
Set
Answer
1234567890123
0000000001111
RESET
Ack / Error
3.2.16.4 Factory Reset
You can send this command to restore factory settings. Factory calibration and serial number
will not be deleted.
Position
Set
Answer
1234567890123
0000000001111
CLR_EEPROM
Ack / Error
Page 27
Operating manual PHOTOMETER
CZIBULA & GRUNDMANN
3.2.16.5 Autosend
If you enable the autosend mode the device measures continuous and sends the values when
measure finished, if the RTS-Line (3.1.1) is set.
Position
Set
Answer
1234567890123
0000000001111
AUTOSEND a
Ack / Error
Get
Answer
AUTOSEND?
a
Content
Description
a
0: Autosend off
1: Autosend on
3.2.16.6 Autorange loop rejection
In case of unfavourable input signal (high dynamic, oscillation) it can happen, no range can be
detected. A message will be displayed on the display (AR failed). In this case you can enable the
autorange loop rejection.
Position
Set
Set
Answer
1234567890123
0000000001111
ARLOOP a
ARLOOP str
Ack / Error
Get
Answer
ARLOOP?
a
Content
Description
a
0: ARLOOP off
1: ARLOOP on
Off: ARLOOP off
On: ARLOOP on
str
Page 28
Operating manual PHOTOMETER
CZIBULA & GRUNDMANN
3.2.16.7 Underrange threshold
Position
Set
Answer
1234567890123
0000000001111
URTHRESH xxxx
Ack / Error
Get
Answer
URTHRESH?
xxxx
Content
Description
xxxx
Underrange threshold in counts,(100000 counts
≙ 100%), default value is 6600 ≙ 6,6%
rejection
The device must be in factory calibration mode to change this parameter.
3.2.16.8 Command set
To be compatible with older luxmeter firmware versions (V1.xx) you can set the command
set to V1. We recommend to use command set 1 only if you have old pc software and have no
possibility to change.
The main advantage of command set 2 is that you get a reply on every command request (Ack
/ Error), so you can check the success of the command.
Position
Set
Answer
1234567890123
0000000001111
CMDSET x
Ack / Error
Get
Answer
CMDSET?
x
Content
Description
x
Command set
1 : Luxmeter Version 1
2 : Luxmeter Version 2 and later
Page 29
Operating manual PHOTOMETER
CZIBULA & GRUNDMANN
4
Calibration
The device was tested and calibrated and agrees with the published Technical specifications. The
accuracy and the calibration of this device is traceable to the normal of the PTB (PhysikalischTechnischen Bundesanstalt). The calibration is arranged with lamps what are compared and set up
with calibrated normales in regular and adequate intervals.
The Photometer is factory calibrated. It is recommend that the device will be recalibrated in intervals of
two years by CZIBULA & GRUNDMANN GMBH.
5
Electrical fuses
The luxmeter contains a fuse of 400mA at its mains connector.
6
Warranty
CZIBULA & GRUNDMANN GMBH warrants for the period of one year from delivery that instrument
maintains ist technical properties.
Whenever the instrument shows a defect during this period of time it has to be sent to the factory in
Berlin. It may be repaired or exchanged. After repair it will be sent to the customer.
No warranty is given if the customer modifies the instrument or changes parts inside.
Also no warranty is given for defective batteries, mechanical defects caused by the customer or third
people.
Page 30
Operating manual PHOTOMETER
CZIBULA & GRUNDMANN
7
Technical specifications
Instrument
Manufacturer
CZIBULA & GRUNDMANN GMBH
Type
Photometer
Display Range
0,1pA … 1 mA
0,001 lx to 200 klx (depending on sensor)
functions
User-calibration
Selectable integration time
Interface parameter settings
External or internal trigger Trigger
Firmware-Update using RS232-interface
Use
Application and environment
Laboratory / indoor
Special application
Goniometers, integrating spheres
Class
Acc. to DIN 5032-7
Class L or Class A
Sensor
Type
Full-filtered Si Photocell
External, plugged in
Display Unit
Cable length
3 m / others on request
Spatial sensitivity
Cosine
Temperature control
See certificate
Diameter of sensitive area
8 mm or 25mm
Amplifier
Trans-impedance-amplifier
Integration time
10ms to 400ms
Meas rate
Up to 40 s-1 , depends on integration time
display
16 character LCD illuminated
Meas ranges
7 ranges, auto or manual
Interfaces
RS232, on demand IEEE488/USB
Analog output
0 to 10V (100µA/V .. 100pA/V)
parameters
DIN 5032-6
calibration deviation
ukal
< 1%
V(λ)- adjustment
f’1
See test chart
UV-sensitivity
u
< 0,01%
IR- sensitivity
r
< 0,01%
linearity
f3
< 0,1%
indicator
f4
< 0,1%
fatigue (at 1 klx)
f5
< 0,1%
Page 31
Operating manual PHOTOMETER
CZIBULA & GRUNDMANN
Calibration
temperature coefficient
α25
< 0,1%/K (Kl. L) bzw. < 0,2%/K (Kl. A)
Modulated light
f7
< 0,1%
Trim fault
f11
< 0,1%
Overall characteristic
fges
< 3% bzw. < 5%
Normal
bei norm illuminant A
environmental temperature
(25 ± 1)° C according to DIN 5032-6
recommend recalibration interval
2 Years
Nominal voltage
230 V / 50 Hz
Voltage range
120 V – 240 V / 47 Hz – 63 Hz
operation
0°C < T < 60°C (75 % rel. humidity, not condens.)
Stock
-20°C <T<75°C
L x B x H Device
315 mm x 255 mm x 120 mm
L x B x H Standard-photometer head
∅ 34 mm x 21 mm
L x B x H thermostated photometer head
∅ 50 mm x 49 mm
Device
3,2 kg
Standard-photometer head
50 g
thermostated photometer head
300 g
Elektrical
specifications
Temperature
Metrics
Weight
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LuxmeterV3.02e.doc/12/12/08
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