Chapter 12. Technical Data
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Chapter 12. Technical Data

Table of Contents

12.1. Specification

Property

Specification

Housing Dimensions

260 × 194 × 50 [mm]

Weight

950 g

Protection

IP65

Temperature

-40–+65 °C (operation)

-20–+65 °C (display readable)

Memory

Meteo-40S: 1 GB

Meteo-40M: 2 GB

Meteo-40L: 2 GB

Date Format

YYYY-MM-DD

Time Format

hh:mm:ss

Clock

Buffered real time clock

Accuracy: -40–+85 °C (±3.5 ppm);

0–+40 °C (±2 ppm)

3 V Lithium Button Cell CR2032;

approx. 180 mAh; operating time >3 years

Power Supply

No internal supply! (see Section 12.2.13, “Electrical Specification of the Power Supply”)

	Important
	Meteo-40 has no internal supply battery! External power supply is essential for proper operation. Section 12.2.13, “Electrical Specification of the Power Supply” contains the characteristics of the voltage supply and the current consumption of the data logger.

Figure 12.1. Mounting threads dimensions.

12.2. Electrical Characteristics

12.2.1. Electrical Specifications of Analog Voltage Channels / Differential Inputs
12.2.2. Electrical Specifications of Analog Current Channels / Differential Inputs
12.2.3. Electrical Specifications of Internal Measurements
12.2.4. Electrical Specifications of Counter Channels / Non-Differential Inputs
12.2.5. Electrical Specifications of Digital Channels (Serial Input / Output)
12.2.6. Electrical Specifications for Digital Clock Output
12.2.7. Electrical Specifications for Analog Current Source
12.2.8. Electrical Specifications for Switches
12.2.9. Electrical Specifications of the 5 V Output
12.2.10. Electrical Specifications of the RS485 Interface
12.2.11. Electrical Specification of the Ethernet Interface
12.2.12. Electrical Specification of the RS232 Interface
12.2.13. Electrical Specification of the Power Supply

The values given in the following tables Table 12.1, “Electrical Specifications of Analog Voltage Channels / Differential Inputs” to Table 12.12, “Electrical Specification of the Power Supply” contain the specifications of the digital and analog inputs and outputs. The given values are specified for a temperature range of -40– +65 °C.

	Note
	All inputs and outputs are protected against overvoltage and electrostatic discharge using suppressor diodes. All voltage outputs of the data logger are fused by an self-resetting electronic fuse. Additionally, the power supply comprises an reverse-polarity protection diode.

12.2.1. Electrical Specifications of Analog Voltage Channels / Differential Inputs

Table 12.1. Electrical Specifications of Analog Voltage Channels / Differential Inputs

Property

Specification

Number of Channels per Data Logger Type

12 @ Meteo-40L (A1–A12)

8 @ Meteo-40M (A1–A8)

4 @ Meteo-40S (A1–A4)

Available Voltage Ranges (DC)

±0.1 V

±1 V

±10 V

0.1 V–0.3 V

Internal Resolution (Bit)

15 bit (Range: ±0.1 V)

16 bit (Range: ±1 V)

16 bit (Range: ±10 V)

16 bit (Range: 0.1 V–0.3 V)

Internal Resolution (Voltage)

6.1 µV (Range: ±0.1 V)

30 µV (Range: ±1 V)

300 µV (Range: ±10 V)

3.1 µV (Range: 0.1 V–0.3 V)

Measurement Accuracy (Voltage)

≤ 50 µV (Range: ±0.1 V)

≤ 150 µV (Range: ±1 V)

≤ 1 mV (Range: ±10 V)

≤ 50 µV (Range: 0.1 V–0.3 V)

Input Impedance

1 MΩ

Input Voltage

min. -12 V

max. +12 V

Maximum Measurement Frequency

4 Hz

12.2.2. Electrical Specifications of Analog Current Channels / Differential Inputs

Table 12.2. Electrical Specifications of Analog Current Channels / Differential Inputs

Property

Specification

Number of Channels per Data Logger Type

2 @ Meteo-40L (AC1–AC2)

1 @ Meteo-40M (AC1)

1 @ Meteo-40S (AC1)

Available Current Ranges (DC)

±1 mA

±10 mA

±100 mA

Measurement Accuracy (DC)

≤ 5µA (Range: ±1 mA)

≤ 30µA (Range: ±10 mA)

≤ 300µA (Range: ±100 mA)

Resolution (Bit)

13 bit (Range: ±1 mA)

15 bit (Range: ±10 mA

Input Impedance (Shunt)

4.7 Ω

Maximum Input Current

150 mA

Maximum Input Voltage

0.75 V

Maximum Measurement Frequency

4 Hz

12.2.3. Electrical Specifications of Internal Measurements

Meteo-40 comprises measurement of Internal Supply Voltage and Internal Current of the data logger. These measurement values can be used for remote verification of the functionality of the data logger and are written to the source data and the CSV data files respectively.

Important Notes:

Internal Supply Voltage and Internal Current are recorded with 12 bit resolution only,
Internal Supply Voltage is measured directly behind a reverse polarity protection diode. This means: The measured value is approximately 0.35 volt lower than the supply voltage at the logger's supply terminals.

12.2.4. Electrical Specifications of Counter Channels / Non-Differential Inputs

The counter counts impulses within a defined measurement timespan. This measurement timespan is derived from a precise timer signal with a precision of ± 5 ppm in the temperature range -40–+65 °C. Note: An impulse is the sequence of two consecutive changes of logical states (0 1 0 or 1 0 1). If the second state change of one impulse does not fit into the defined measurement timespan this impuls is not taken into account in this timespan.

In case of a measurement timespan of one second the count of impulses is (nearly) equal to frequency (Unit: Hz).

Table 12.3. Electrical Specifications of Counter Channels / Non-Differential Inputs

Property

Specification

Number of Channels per Data Logger Type

12 @ Meteo-40L (C1–C12)

8 @ Meteo-40M (C1–C8)

4 @ Meteo-40S (C1–C4)

Frequency Range (TTL-Level)

1 Hz–25 kHz

Frequency Resolution ^[a]

0.1 Hz

Voltage Threshold (f > 1 Hz)

0.22 V

Input Voltage

min. -12 V

max. +12 V

Period Measurement (Non-Differential Inputs)

Channels P1 (C5), P2 (C6), P3 (C11), P4 (C12)

^[a]The frequency resolution depends on the period time setting. Longer period time setting results in higher resolution.

12.2.5. Electrical Specifications of Digital Channels (Serial Input / Output)

Table 12.4. Electrical Specifications of Digital Channels (Serial Input / Output)

Property

Specification

Number of Channels per Data Logger Type

8 @ Meteo-40L (D1–D8)

4 @ Meteo-40M (D1–D4)

2 @ Meteo-40S (D1–D2)

Input Voltage Range (High State)

2 V–25 V

Input Voltage Range (Low State)

-0.5 V–0.6 V

Input Resistance

≥ 10 kΩ

12.2.6. Electrical Specifications for Digital Clock Output

Table 12.5. Electrical Specifications for Digital Clock Output

Property

Specification

Number of Channels per Data Logger Type

8 @ Meteo-40L (D1–D8)

4 @ Meteo-40M (D1–D4)

2 @ Meteo-40S (D1–D2)

High State

5 V

Low State

0 V

Output Resistance

100 Ω

Minimal Load Resistance

500 Ω

12.2.7. Electrical Specifications for Analog Current Source

Table 12.6. Electrical Specifications for Anlog Current Source

Property

Specification

Number of Channels per Data Logger Type

2 @ Meteo-40L (CS1–CS8)

1 @ Meteo-40M (CS1)

1 @ Meteo-40S (CS1)

Nominal Current

200 µA

Tolerances

< 0.5 %

12.2.8. Electrical Specifications for Switches

Table 12.7. Electrical Specifications for Switches

Property

Specification

Number of Channels per Data Logger Type

8 @ Meteo-40L (S1–S8)

4 @ Meteo-40M (S1–S4)

2 @ Meteo-40S (S1–S2)

Switch Voltage Range

5 V–28 V

Max. Current Continuous Switch

120 mA

Peak Switch Current (2 s)

400 mA

Switch On Resistance

< 350 mΩ

Switch Off Resistance

> 10 MΩ

Important

The switches section of the Meteo-40 comprises 5 V outputs to supply periferical devices inside the steel cabinet of the measurement setup. The 5 V supply is not intended to supply sensors connected with long cables due to the risk of damage caused by lightning strike.

The 5 V outputs provide an electronic current limiter and an overvoltage protection.

12.2.9. Electrical Specifications of the 5 V Output

Table 12.8. Electrical Specification of the 5 V Output

Property	Specification
Max. output voltage	5.5 V
Min. output voltage	4.7 V
Max. output current per output terminal	15 mA

12.2.10. Electrical Specifications of the RS485 Interface

Table 12.9. Electrical Specification of the RS485 Interface

Property	Specification
Supply Voltage RS485 A, B	5 V
Termination Resistor (Bus Termination)	120 Ω
Maximal Transmission Rate	1 MB/s

	Note
	Biasing of RS485 interface via external module M83570.

12.2.11. Electrical Specification of the Ethernet Interface

	Important
	The Ethernet interface is only available on Meteo-40 Revision D.

Table 12.10. Electrical Specification of the Ethernet Interface

Property	Specification
Ethernet port (Meteo-40 Revision D)	100 Mbit/s (100BASE-TX)

12.2.12. Electrical Specification of the RS232 Interface

	Important
	The RS232 interface is only available on Meteo-40 Revision C. The production of Meteo-40 Revision C stopped in October 2012.

Table 12.11. Electrical Specification of the RS232 Interface

Property	Specification
Serial interface port (Meteo-40 Revision C)	Male 9-pin RS232 connector for connection to serial modem
Maximal Baudrate	115200 Baud

12.2.13. Electrical Specification of the Power Supply

	Important
	Meteo-40 has no internal supply battery! External power supply is essential for proper operation.

Table 12.12. Electrical Specification of the Power Supply

Power Supply

Property

Specification

Supply Voltage Input (with Reverse Voltage Protection)

Supply Voltage Range

9 V (DC)–36 V (DC)

Peak Supply Voltage (10 s)

55 V (DC)

Current Consumption

Average Current Consumption @ 12 V (DC) during measurement

≤ 30 mA (P < 360 mW)

Average Current Consumption @ 12 V (DC) during communication

≤ 70 mA (P ≤ 840 mW)

for Meteo-40 Revision D

≤ 60 mA (P < 720 mW)

for Meteo-40 Revision C

Average Current Consumption @ 12 V (DC) with display illumination

175 mA (P ≤ 2.1 W)

for Meteo-40 Revision D

< 500 mA (P < 6 W)

for Meteo-40 Revision C

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