Campbell TX320 Manuel d'utilisateur télécharger pdf (Page 7)

ANALOG INPUTS; DIGITAL I/O

Channels SE1 to SE5 can be individually configured

for single-ended measurement or digital I/O.

SINGLE-ENDED MEASUREMENT (SE1 TO SE5):

Analog Input Range: 0 ≤ V < 2.5 Vdc

Measurement Resolution: 0.6 mV

Measurement Accuracy

Typical: ±(0.25% of reading + 1.2 mV offset)

over -40° to +50°C

Worst-case: ±(1% of reading + 2.4 mV offset)

over -40° to 50°C

DIGITAL I/O (SE1 TO SE5):

Input/Output High State: 2.1 to 3.3 Vdc

Input/Output Low State: <0.9 Vdc

Output High State: 3.3 V (no load)

Drive Current: 220 µA @ 2.7 Vdc

Maximum Input Voltage: 4 Vdc

HALF BRIDGE MEASUREMENTS:

Accuracy: Relative to the excitation.

Using +2.5 Vdc excitation, is

±(0.06% of reading + 2.4 mV)/(2.5 Vdc)

PERIOD AVERAGING (SE1 TO SE4):

Maximum Input Voltage: 4 Vdc

Frequency Range: 0 to 150 kHz

Voltage Threshold: counts cycles on transition

from <0.9 Vdc to >2.1 Vdc

EXCITATION CHANNELS (VX1 AND VX2):

Range: Programmable 0, 2.5, 5 Vdc, or

off (floating)

Accuracy: ±25 mV on +2.5 Vdc range, ±125 mV

on +5.0 Vdc range

Maximum Current: 25 mA on +2.5 Vdc range,

10 mA on +5.0 Vdc range

CONTROL PORTS (C1 AND C2)

DIGITAL I/O:

Voltage Level When Configured as Input:

<0.9 Vdc (low state) to >2.7 Vdc (high state)

Voltage Level When Configured as Output:

0 V (low state), 5 Vdc (high state) (no load)

Logic Level: TTL

Drive Current: 1.5 mA @ 4.5 V

SDI-12: SDI-12 sensors connect to C1

PULSE COUNTERS

SWITCH CLOSURE (P_SW):

Maximum Count Rate: 100 Hz

Minimum Switch Open Time: 5 ms

Minimum Switch Closed Time: 5 ms

Maximum Bounce Time: 4 ms

PULSE COUNT (P_SW, C1, AND C2):

Voltage Threshold: count on transition from

<0.9 V to >2.7 Vdc

Minimum Pulse Width: 320 µs

Maximum Input Frequency: 1 kHz

Max Input Voltage: C1 & C2 (6.5 V), P_SW (4 Vdc)

LOW LEVEL AC (P_LL):

Voltage Threshold: <0.5 to >2 V

Minimum Input: 20 mV RMS

Maximum Frequency: 1 kHz

Maximum Input: ±20 V

Note: C1 and C2 can be used for switch closure

using the battery voltage and a 100 kOhm

pull-up resistor. If the dc offset is >0.5 V, then

AC coupling is required.

COMMUNICATIONS

SERIAL INTERFACE: Female RS-232 9-pin

interface for logger-to-PC communications

ON-BOARD SPREAD SPECTRUM RADIO:

Frequency: 915 MHz (CR206X),

922 MHz (CR211X),

or 2.4 GHz (CR216X)

Transmission Range: 1 mile with 0 dBd ¼ wave

antenna (line-of-sight) and 900 MHz radios;

0.6 miles (1 km) with 0 dBd ½ wave antenna

(line-of-sight) and 2.4 GHz radio;

up to 10 miles with higher gain antenna

(line-of-sight)

RF4XX used as a base station radio

Transmitter Power Output:

100 mW (CR206X, CR211X);

50 mW (CR216X)

AVAILABLE RADIO TRANSMISSION MODES:

Always on, program controlled

Cycle Time: 1 or 8 s cycles; on for 100 ms every

period; checks for incoming communication

Scheduled Transmission Time: off until transmis-

sion time

PakBus

packet switching network protocol

CLOCK ACCURACY

8.2 minutes/month @ -40° to +50°C; 1 minute/month

@ +25°C

CPU AND STORAGE

FINAL STORAGE: 500 kB Flash, data format

is 4 Bs per data point (table-based)

SRAM: 8 kB

COMPILED PROGRAM STORAGE: up to 19.6 kB

depending on structure of CRBasic program

OPERATING SYSTEM FLASH: 106 kB

FASTEST SCAN RATE: once per second

SWITCHED BATTERY (SW BATTERY)

Switched under program control; 300 mA minimum

current available

POWER

BATTERY VOLTAGE RANGE: 7 to 16 Vdc

(can program datalogger to measure internal

battery voltage)

MAXIMUM CONTINUOUS BATTERY CHARGING

CURRENT:

0.9 A @ 20°C; 0.65 A @ 50°C

RECOMMENDED BATTERIES: 12 Vdc, 7 A h or

smaller sealed rechargeable battery when

connected to the on-board charging circuit.

Using larger batteries with the datalogger's

built-in charger may result in excessive PC

board heating. This is especially a concern

when the battery is deeply discharged or failing

with a shorted cell.

Alkaline cells, lithium, or other non-rechargeable

battery types may be connected if the charging

circuit is not used (i.e., nothing connected to

Charge terminals).

CHARGER INPUT VOLTAGE: 16 to 22 Vdc

SOLAR PANEL: 10 W or smaller when using

on-board charging circuit.

WALL CHARGER: 1 A or smaller when using on-

board charging circuit.

SHELF LIFE OF CLOCK’S BACKUP BATTERY:

5 years

CURRENT DRAIN (@12 V)

QUIESCENT CURRENT DRAIN:

No Radio or Radio Powered Off: ~0.2 mA

ACTIVE CURRENT DRAIN:

No radio ~3 mA

Radio receive ~20 mA (CR206X, CR211X),

~36 mA (CR216X)

Radio transmit ~75 mA (CR206X, CR211X,

CR216X)

AVERAGE CONTINUOUS CURRENT DRAIN:

Radio always on ~20 mA (CR206X, CR211X),

~36 mA (CR216X)

Radio in 1 s duty cycle ~2.2 mA (CR206X,

CR211X), ~4 mA (CR216X)

Radio in 8 s duty cycle ~0.45 mA (CR206X,

CR211X), ~0.8 mA (CR216X)

CE COMPLIANCE (as of 03/02)

CE COMPLIANT DATALOGGERS: CR200X,

CR206X, CR211X, CR216X

STANDARD(S) TO WHICH CONFORMITY IS

DECLARED: IEC61326:2002

EMI AND ESD PROTECTION

IMMUNITY: Meets or exceeds following standards:

ESD: per IEC 1000-4-2; ±8 kV air, ±4 kV contact

discharge

RF: per IEC 1000-4-3; 3 V/m, 80-1000 MHz

EFT: per IEC 1000-4-4; 1 kV power, 500 V I/O

Surge: per IEC 1000-4-5; 1 kV power and I/O

Conducted: per IEC 1000-4-6; 3 V 150 kHz-80 MHz

Emissions and immunity performance criteria avail-

able on request.

PHYSICAL

CASE DESCRIPTION: Aluminum with spring-loaded

terminals

DIMENSIONS (including terminals):

14.0 cm x 7.6 cm x 5.1 cm; 5.5 in x 3 in x 2 in

WEIGHT:

CR200X or CR295X: 242 g (8.5 oz)

CR206X, CR211X, or CR216X: 271 g (9.5 oz)

CUSTOM CASE: available for OEM applications;

contact Campbell Scientific

WARRANTY

Three year covering parts and labor.

CR200X-series Datalogger Specications

Electrical specications are valid over a -40° to +50°C range unless otherwise specied; non-condensing environment required. We recommend that

you conrm system conguration and critical specications with Campbell Scientic before purchase.

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Campbell TX320 Manuel d'utilisateur Page 7

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