The DT82I extends the popular dataTaker DT80 data logger rangefor use in applications requiring more sensors. Innovative 'dualchannel' technology allows up to 32 isolated or 48 commonreferenced analog inputs. A regulated 12Vdc output, universaldigital I/O and 'smart sensor' ports allow difficult applicationsto be easily implemented. All standard DT8 data logger rangefeatures are retained including USB memory stick support, Modbusfor SCADA, Ethernet, WEB, FTP and multiple SDI-12 sensornetworks.
Multiplexer (Input Selector)
Relay Multiplexer – provides isolation between inputs*
100KΩ, >100MΩ, programmable
Common mode range: ±3.5V or ±35V on 30V range
Sampling for accuracy and noise rejection by integrating
over 50/60Hz line period.
Maximum sample speed: 25Hz
Effective resolution: 18 bits
Common mode rejection 30mV range: >90dB
Line (50/60Hz) series mode rejection: >35dB
Sensor Excitation (Supply)
Analog channels: Controlled excitation of 4.5V, 250μA,
2.5mA or Switched external supply.
General Purpose: Switchable 12V regulated supply for
powering sensors & accessories. (max 150mA)
Supports a wide range of sensors including, but not
limited to, those listed below. A wide range of sensor
scaling and linearising facilities including polynomials,
expressions and functions.
Types: B, C, D, E, G, J, K, N, R, S, T
Calibration standard: ITS-90
Materials supported: Pt, Ni, Cu
Resistance range: 10Ω to 10KΩ
Number of channels: 8 Bi-directional channels for
state & count input or state output.
Input Type: 8 logic level (max: 10Hz, 4 x 30V, 4 x 20V)
Measure state or low speed counts
Low speed counters do not function in sleep mode.
Output Type: 4 with open drain FET
(max: 30V, 100mA), 4 with logic output.
1 latching relay (max: 30Vdc, 1A)
Dedicated Counter Inputs
Number: 4 high speed counters or 2 phase encoder
(quadrature) inputs (max: 10kHz, 2 x ±30V, 2 x ±10V).
2 Counters have 10mV sensitive inputs for magnetic pick-ups.
Size: 32 bit
Serial Sensor Channel
Two channels available and programmable to allow data
to be logged from smart sensors and data streams.
Dedicated Port: RS232, RS422, RS485
Host Port: RS232 only*
Handshake lines: RTS, CTS
Baud rate: 300 to 115200