Measuring ranges and
technical data
ALMEMO®: up to 4 measuring channels on 1 measuring input!
With the ALMEMO®-system the number of measuring channels, which is
available at the corresponding measuring input, depends on the instrument and the sensor
in use. The reason for that is based on the patented ALMEMO®-connector-system:
The ALMEMO®-connector contains 6 screw-terminals, 2 for the sensor power
supply, 4 for the measurement signal of the sensor. Using Pt100-sensors with
4-wire-circuit all of the free connections are needed for the measurement signal. Thus,
only one sensor of this type can be connected to one measuring input. Electrical signals
only need 2 connections for the measurement signal. Therefore, two different measurement
signals can be with one measuring channel each can be measured with one connector.
Humidity sensors for example are often combined with a temperature sensor.
The corresponding calculating values (e.g. dew point, mixture ratio, partial vapour
pressure, enthalpie) are programmed in the connector as additional measuring channels.
For each measuring input a maximum number of 4 measuring channels can be output, however.
Some instruments have a limited number of measuring channels at each measuring input.
Using dataloggers, only 2 measuring channels are available for each measuring input by
standard.
ALMEMO®: acquisition, documentation, evaluation
ALMEMO®-instruments are the solution for many measurement applications.
Data recording, decentral data acquisition and computer evaluation are often standard
requirements.
To make it easier for you to find the suitable instrument concerning your individual
measurement applications,
we included a symbol to the instrument data:
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memory 520 kB (100000 values)
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addressablity and network capability with the relevant cables
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adaptable to computer, digital data output via interface module
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printer connectable for measurement-recording
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ALMEMO® measuring ranges
clic to see the table
ALMEMO® General Technical Data
| Inputs: |
Channel switch
between the sockets: |
4-polar photovoltaic relays with
potential separation: 50 V
offset voltage: <5m V |
| Measuring channels: |
depending on type of instrument and sensors,
a different number of channels is available |
| Sensor power supply: |
7.2 V … 12 V unregulated depending on
power
supply max 50 mA/instrument |
| Measuring current Pt100: |
1 mA |
| Diff. amplification factors: |
1, 2, 5, 10, 20, 40, 100 |
| Source impedance: |
50 M W |
| A/D converter: |
multi slope integrating, 16-bit resolution |
| Measuring rate: |
2 or 10 measurements/s |
| Self calibration: |
automatic zero-point correction,
measuring current calibration |
| System accuracy: |
±0.03% of meas. value,
±2 digits (at 2.5 measurements/s) |
| Temperature drift: |
0.005%/°C |
| Nominal temperature: |
22°C ±2K |
| Ref. junction compensation: |
eff. in range 30 to +100°C
accuracy: ±0.2°C, ±0.01K/°C |
| Check functions: |
automatic sensor and sensor breakage
detection,
interface identification |
| Outputs |
| ALMEMO® output socket 1: |
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| Digital interface: |
Baud rates:
150, 300, 600, 1200, 2400, 4800, 9600, 57.6K
data 8 bit serial, ASCII code, 1 Startbit,
1 Stopbit, no parity, RS232 (with data cable ZA 1909-DK,
RS422 (with network distributor ZA 5099-NV)
RS485 (with network branch box ZA 5085 NV
Centronics (with data cable ZA 1936-DK) |
| Analog Output: |
-1.25 … 2.0 V, not galv. sep. (with cable ZA 1601-RK) |
| ALMEMO®output socket 2: |
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| Networking : |
current loop (with network cable ZA 1999-NK) |
| Analog output : |
-1.25 … 2.0 V, not galv. sep. (with cable ZA 1601-RK) |
| Trigger input : |
with trigger cable ZA 1000-EK/EAK, ZA 8000-RTA |
| Relay output : |
with relay cable ZA 1000-AK/EAK, ZA
8000-RTA |
| Ambient conditions: |
| Operating temperature: |
-10 to +60°C |
| Storage temperature: |
-30 to +60°C |
| Humidity range: |
10 to 90% (non condensing) |
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