Technical Data; Operating Modes - Conrad 55 96 19 Bedienungsanleitung

Configuration before the first measurement
The following settings are permanently stored in the temperature logger. They are available for every
operating mode after restarting.
The menu language can be set by entering „0" and the letter „d" (= German) or „e" (= English).
Furthermore, a decimal separator can be determined via the input „4". This is important, e.g. for further
processing of the measured values in spreadsheet programmes (stored measured values are not
changed).
Additionally, an ADC input can be selected by entering „5" and activated with „j" (= ja=yes) or deactivated
with „n" (= no).
Output/storage of the analogue value is performed as the last value of a data record. The analogue input
should never be used openly to avoid interfering irradiation (50 Hz mains hum, etc.).
The analogue/ADC input should be calibrated before use. The analogue/ADC input is calibrated by input
of „6".
The measuring range is about 0....1 V. For higher voltages, an advanced voltage divider and calibration
of the temperature logger is required.
The application of a voltage divider is explained in an example below.
Example for a voltage divider:
R1 = 150kΩ, R2 = 10kΩ
The measuring range here is at: 1 V * (R1+R2) / R2 = 16 V
In the example, a voltage up to 16 V can be measured across the voltage
divider according to calculations without exceeding the measured range
of the temperature logger.
In the terminal window, the following prompt appears after selecting the function „Calibrate ADC value":
„Voltage divider at analogue input, voltage 0 V, if ready, any key..."
Other procedures:
• Connect an adjustable voltage source/mains unit with the previously calculated value to the voltage
divider (the mass connection of the voltage divider is connected to the GND connection of the
temperature logger).
• After pushing any key, the terminal programme starts with continuous measurements.
• Fine adjustment of the voltage around the calculated value (in the example about 16 V), the display in
the terminal programme must be adjusted to abut „0" (-1..1) (a small increase of the voltage beyond
16 V would be admissible in the example).
• Stop the measurement by pushing any button.
• Perform a precise measurement of the currently pending voltage across the entire voltage divider with
a digital multimeter (in the example, the value must be at about 16 V).
• Enter the measured voltage value with decimal point and two decimal digits -> „Enter".
The calibration is completed, the parameters stored permanently in the temperature logger. The temperature
logger can now measure voltage of up to about 16 V across the voltage divider. Observe that no higher
voltage than the one calibrated for the device is pending. Calibration (e.g. with other impedances of the
voltage divider) can be performed at any time.
The measuring interval can be determined via the input „7". The input here is made in seconds and can
be between 1 and 65534 (= 1 s to ~ 18.2 h). Then confirm this function with „Enter". Deletion of the input
via the back button is not possible in the terminal programme. If an incorrect value was entered
accidentally, it can be changed by calling the menu „Setting measuring interval" again.

Operating modes

The temperature logger must be configured independently of the operating mode used before use (see
confirmation before the first measurement). The data saved in the temperature logger are overwritten at
every new measurement in the „Stand-Alone-Mode" or the „PC mode with logging function" (also when
using the analogue input only). The first measurement is performed for all modes after completion of the
measuring interval set.
The temperature logger has three operating types (modes):
1) „Stand alone" Mode
The temperature logger independently records measured values (without PC connection). Data that are
already present are deleted. Later transfer of the recorded data to the PC is possible. The user can enter
this operating mode by the following procedure:
• Deactivate temperature logger after the configuration and disconnect it from the PC
• Bridge jumper JP1 (see PCB label) (put on jumper)
• Activate temperature logger or connect it to the power supply
• Remove jumper JP1 again
The LED lights up for about 10 seconds (memory is deleted!). Then the LED flashes once per second or
twice per measurement and thrice when the memory is full. The data saved can be backed up via the
terminal programme by calling the menu item „Display recorded measured values" by importing the
copying the displayed data into a text file and, e.g., importing them into Excel (see chapter: „Save measured
value and process them further"). The „Stand-alone" mode is terminated by deactivation of the temperature
logger.
2) PC mode: Input „1" (= „Display measured values")
The temperature logger connected to the PC sends the measured data to the serial interface. It is displayed
via a terminal programme. The measuring values will not be stored! The measurement is cancelled with
„Q" (input of the large letter Q) for „Quit"!
3) PC mode and logger: Input „2" (= „Display and record measured values")
The function is as in „2) PC-Mode" but the measured values are additionally saved in the temperature
logger (the LED lights up for about 10 seconds -> any data present on the device are deleted). The
measurement is cancelled with „Q" (input of the large letter Q) for „Quit"!

If the data are to be archived, proceed as described in the chapter „Save measured values and
process them further".
Save measured value and process them further
Read measured values:
The measuring series can be taken from the terminal programme by simple copying (highlight values ->
right-click -> copy; or alternatively via the keyboard by „Ctrl + c") and inserted and saved in a text file.
Example: Further processing of the measured values with Microsoft Excel
A comma is needed in the German Excel version as a decimal separator (see programme menu 4: „Decimal
separator [,]"). After starting the Excel programme, the measured values can be imported via the function
„File/Open" („Display all files" must be selected). Then the file with the saved measured values (e.g.
Messwerte1.txt) must be selected.
Operation of the „Continue" button takes you to another input window. You need to check „Semicolon" here
in the menu item „separator" to display the measured data per sensor in one column (the semicolon
separates the measured values from each other). Push the „End" button to accept the measured values
into the Excel document.
Then you can process the measured values further, e.g. in a graphical display. The procedure may deviate
in different Excel versions.

Technical Data

Voltage supply ....................................... 7 - 14 V/DC
Power input ............................................ Max. 30 mA (at 12 connected temp. sensors)
Temperature input (SEN) ...................... Max. 12 temperature sensors type „DS1820"
Analogue input ....................................... Resolution 10 bit, measuring range 0....1 V/DC
Interface setting ..................................... 19200 Baud, 8 data bits, no parity bit, 1 stop bit.
Measuring interval ................................. Can be set from 1 s to about 65534 s (~18.2 h)
Memory ................................................... Max. 32768 measured values
Dimensions of the PCB ......................... Approx. 28 x 35 mm
Max. permissible total cable length ...... 10 m
Operating temperature range ................ 0 °C to +60 °C
Temperature range sensors .................. -55 °C to +125 °C
These operating instructions are a publication by Conrad Electronic SE, Klaus-Conrad-Str. 1,
D-92240 Hirschau (www.conrad.com).
All rights including translation reserved. Reproduction by any method, e.g. photocopy, microfilming,
or the capture in electronic data processing systems require the prior written approval by the editor.
Reprinting, also in part, is prohibited.
These operating instructions represent the technical status at the time of printing. Changes in
technology and equipment reserved.
© Copyright 2013 by Conrad Electronic SE.