DO9847K Three channel multifunction data logger for Temperature, Relative Humidity and
Temperature measurement. Sampling speed one per second each channel.
Storage capacity 32000 samples per channel.
Functions: CLOCK, HOLD, RELATIVE , MINIMUM, MAXIMUM, MEAN MEASUREMENT.
Simultaneous display of the measurements on three channels or two channels plus the difference between two channels. Calibration of the individual probes with permanent storage of the
calibration data inside the probe, it is possible to change the probes without losing the calibration.
The instrument allows the input of various types of probe of different physical magnitudes.
The software can be updated via RS232C, to implement new physical magnitudes, starting
from version 2.0.
Platinum probes (25, 100, 500 Ω at 0°C), Thermocouples K, J, E, T, N, R, S, B probes,
combined R.H. and temperature, pressure also barometric one, air speed, light, mV and mA probes
can be connected through the SICRAM modules.
Centesimal temperature measurements can be carried out by PRT sensors in the
range: –200…+350°C, and decimal in the range +350…+850 °C.

It is provided with a 128x64 pixel (56.27x38.35 mm)
graphic display and three independent inputs.

Each input can be connected to one channel or
two channel dual probes
(two thermocouples, relative humidity temperature).

The instrument automatically acknowledges SICRAM probes connected to the input
(memory equipped and configurable intelligent probe).
Functions: watch, hold, max., min., average,
immediate or deferred start record logging, difference between two inputs, relative measures, three
input channel measurement and inside reference temperature display.

Sampling time: 1 per second/input.
Probe calibration through a SICRAM module; calibration data permanent storage inside the probe.
Storage capacity: 32,000 readings per input.
Storage interval and printing can be configured between one second and one hour.
RS232C serial output: from 300 up to 38,400 baud rate.
Immediate or deferred print-out.
Stored data can be displayed and stored data blocks can be deleted.
Automatic shutdown after 8 seconds can be disabled.
Units of measurement can be selected according to the physical quantity of the connected probe.
Firmware update through RS232C serial link.
Different types of SICRAM probes can be connected to the input: either Platinum sensor temperature probes, thermocouples or temperature and humidity probes, Vdc and mA.

Power supply: Batteries: 4 x 1.5V AA alkaline batteries; operating time with high quality batteries: about 60h.

Mains: through 9Vdc, 250mA external power supply (2-pole-connector).

Operating conditions:
Operating temperature: -10...+50°C.
Storage temperature: -25...+65°C.
Relative Humidity: 0...90%R.H., not condensing.
LCD display: 128x64 pixel (56.27x38.35 mm) graphic LCD.
Keyboard: 18 multifunction keys and 3 function keys.
Recorded data safety: unlimited, independently from batteries charging conditions.
Measured values storage: on 16 data files divided into 16-sample pages.
Quantity: 32,000 samples per input channel.
Storage interval: 1 second...1 hour.
Time/Date: time and date, real time.
Accuracy: 1 minute/month maximum error margin.
Serial interface:
RS232C type galvanically insulated, SUB D 9 male connector.
Baud rate: 300...38,400 baud.
Data bit: 8.
Parity: none.
Stop bit: 1.
Flow control: Xon/Xoff.

Immediate print interval: 1s...1h.
RS232C cable max. length: 15 m.
Firmware can be updated through PC using the instrument serial port.
Probes connections: n° 3 DIN45326 8-pole connectors.
Dimension - 245x100x50 mm
Weight:  - 300 gr.
Case: ABS - Protection: rubber.

DO 9847 with SICRAM module: measuring capacity

Temperature measure through PRT Platinum sensor

PRT resistance values @ 0°C 25, 100, 500
Temperature range -200...+850°C
Accuracy with Pt100 sensor ±0.03°C to 350°C, ±0.3°C to 850°C
Resolution 0.01°C from -200°C to 350°C, 0.1°C from 350°C to 800°C
Temperature drift 0.003%/°C

Temperature measure through thermocouple

Temperature range Thermocouple K -200 ... 1370°C
Thermocouple J -100 ... 750°C
Thermocouple T -200 ... 400°C
Thermocouple E -200 ... 750°C
Thermocouple R +200 ... 1480°C
Thermocouple S +200 ... 1480°C
Thermocouple B +200 ... 1800°C
Thermocouple N -200 ... 1300°C
Resolution Thermocouples K, J, T, E, N 0.05°C from upper scale to 350°C, 0.1°C from 350°C to full scale
Thermocouples R, S, B 0.1°C the whole scale
Accuracy Thermocouple K ±0.1°C to 600°C, ±0.2°C above 600°C
Thermocouple J ±0.05°C to 400°C, ±0.1°C above 400°C
Thermocouple T ±0.1°C
Thermocouple E ±0.05°C to 300°C, ±0.08°C above 300°C
Thermocouple R ±0.25°C
Thermocouple S ±0.3°C
Thermocouple B ±0.35°C
Thermocouple N ±0.1°C to 600°C, ±0.2°C above 600°C

Accuracy regards the instrument only; we do not provide for any error caused by
the thermocouple or the cold joint reference sensor.

Temperature Drift 0.02%/°C

Relative humidity and temperature measure

Humidity measure
Sensor capacitive Mk-33
Average capacity @ 30%R.H. 300pF±40pF
Probe operating temperature -40...+150°C
Measure range 0...100%R.H.
Accuracy ±1%R.H. range 20...90%R.H. ±2%R.H. range 10...90%R.H.
Resolution 0.1%R.H.
Temperature Drift 0.05%/°C
%R.H. response time at a constant temperature 10 s (10.80%R.H.; air speed=2m/s)
Temperature measure
Temperature sensor Pt100 (100 @ 0°C)
Temperature range -50...+200°C
Accuracy ±0.03°C
Resolution 0.1°C
Temperature Drift 0.003%/°C
Thermocouple R +200 ... 1480°C
Thermocouple S +200 ... 1480°C
Thermocouple B +200 ... 1800°C
Thermocouple N -200 ... 1300°C