Vaisala QML201C Technical data

Vaisala Data Logger QML201C

www.vaisala.com

The Vaisala Data Logger QML201C

Features/Beneﬁts

Easy to install, economical to

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maintain and upgrade

Field-proven reliability and

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accuracy in harsh environments

Low power consumption

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Extensive calculation and data

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logging capability

Good expandability and high

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level of customization through open and modular design

Built-in TCP/IP connectivity

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Compact design

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The QML201C

The Vaisala Data Logger QML201C incorporates Vaisala’s proven sensor technology. A 32-bit central processing unit (CPU), 24-bit A/D conversion (ADC), autocalibration of the ADC and measurement electronics coupled with advanced data quality control and validation software all ensure the accuracy of data measurement.

Easy to use

Sensor measurements, statistical calculations, data logging and data transmissions are performed according to a user-congured Vaisala Setup Software Lizard. The software has many setup options and advanced features.

Expandability

The systems architecture enables the QML201C to be easily upgraded with

new sensors, calculations, output formats, and logging schedules at any time to accommodate users’ changing requirements.

The basic system provides RS-232, RS- 485 and SDI-12 ports for interfacing with almost any type of telemetry, terminal, displays, and smart sensors. With optional plug-in modules the number of serial ports can be enhanced from 3 up to 9 ports, enabling multiple RS-232, RS -485, SDI-12 and Ethernet connections.

The QML201C data logger is also expandable with a multiplexer unit offering additional 10 differential analog channels or even another QML201C unit. A digital I/O unit adds 8 digital outputs and 8 digital inputs for sensors, power optimizing and unmanned control functions based on user dened requirements.

Technical data

General

Processor 33 MHz, 32-bit Motorola Memory 4MB RAM and 4 MB program ﬂash A/D conversion 24 bit Data logging memory 3.3 MB internal ﬂash memory

Up to 2GB on optional, compact

ﬂash memory card

Sensor inputs 10 analog inputs

(20 single-ended inputs)

2 counter/frequency inputs

Internal channel for BARO-1

pressure transducer

SERIAL COMMUNICATION

Standard one RS-232, RS-485 (two-wire) and

SDI-12

Optional Two optional plug-in slots for

communication modules to

increase the number of the serial

I/O channels up to 6 pcs

Fast serial expansion bus

connecting e.g. digital I/O module Speed 300 ... 38400 bps Parameters Conﬁgurable speed, start bits, data

bits, stop bits, parity, XON/XOFF,

and checksum Voltage (external powering) 8 ... 30 VDC Power consumption (typically with 5 sensors) <10 mA/12V Temperature

operating -50 ... +60 °C (-58 ... 140 °F) extended operating -60 ... +70 °C (-76 ... 158 °F) storage -60 ... +70 °C (-76 ... 158 °F)

Humidity 0 ... 100 %RH

ETHERNET COMMUNICATION

Standard IEEE 802.3 Two plug-in slots for ethernet modules Speed 10 Mbps (10 BASE-T)

Can also be connected to 100

Mbps/1000 Mbps 100/1000 BASE-T

networks with 10 Mbps

Parameters Full/half duplex with auto-negotiation

TCP/IP

Supported protocols ARP, UDP/IP, TCP/IP, FTP, SMTP, PPP

(with PAP or CHAP authentication),

HTTP(get), Telnet, ICMP Echo, DHCP, ARP,

NTP, DNS, serial port tunneling over TCP/IP

Accuracy

All data for ambient temperature range -50 ... +60 °C unless otherwise speciﬁed Temperature measurement (PT100 sensor, measurement range -50 ... +80 °C) Typical uncertainty over

temperature range: -50 ... +60 °C < ±0.04 °C temperature range :-60 ... +70 °C < ±0.08 °C

Max. error over

temperature range: -40 ... +50 °C < ±0.10 °C Max. error at 0 °C < ±0.04 °C Voltage measurement uncertainty, temperature range -50 ... +60 °C

±5.0 V range < 0.06 % of reading ±100 µV

±2.5 V range < 0.04 % of reading ±50 µV

±250 mV range < 0.06 % of reading ±6 µV

±25 mV range < 0.06 % of reading ±5 µV Voltage measurement uncertainty, temperature range -60 ... +70 °C

±5.0 V range < 0.10 % of reading ±150 μV

±2.5 V range < 0.08 % of reading ±80 μV

±250 mV range < 0.10 % of reading ±10 μV

±25 mV range < 0.10 % of reading ±10 μV Frequency measurements ±0.003 % + resolution

up to 20 kHz Common mode range +7 V/-3 V Real-time clock (standard)

accuracy Better than 20 s/month back-up time minimum 5 yrs. with CR1220

Lithium cell

Regulatory compliances

Emission CISPR 22, class B (EN55022) ESD immunity IEC6100-4-2 RF ﬁeld immunity IEC6100-4-3 EFT immunity IEC6100-4-4 Surge (lightning pulses) IEC6100-4-5 Conducted RF immunity IEC6100-4-6

For more information, visit www.vaisala.com or contact us at sales@vaisala.com

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