DT51 User`s Manual Amendment
Contents
1. Height 60mm Power AC DC Convert AC DC 4 Xx g Display Lamp Power Alkaline Lead Acid c t Input 9V 6V Sneg oh lt a 250 mm I amip 270 mm Wiring Battery Bat H 62 10V Lead 1O External Alkaline Battery I 1 O I A Gna 9 18Vac 11 24Vdc Alkaline L Bat gt 56 ev Lead i External Gel Cell Battery x don t care permanent switched powered down while the logger is in the sleep state For the datalaker 57 this is set using DIP switch s4 The factory preset is for the multiplexers to power down while the datal ker 57 ais sleep The current saving is approximately 150 1A which is current draw of the 4 CMOS multiplexer integrated circuits CD4052 See Multiplexer Powering on page 15 logger address range is reduced to 0 7 Multiplexer Power The power consumption of the datalaker 51 can be kept toa minimum if the input multiplexer is datalaker 51 Address See text to right ooooooojbpoo0oo0oo0o0 e 3 The datal ker 51 can be given an address despite the fact that the logger does not support networking The address of a datal ker 51 can be used for identification in the STATUS or STATUS1 commands see STATUS on page 10 identification of returned data if L Address Switch is enabled see Swityches L on page11 If 300 or 9600 baud rate is selected then the address range is limited2. characteristics Note TxD the RS232 standard specifies 2000pF maximum N C cable capacitance and no maximum distance N C The datalaker 51 RS232 COMMS Port is NC A intertace electrically isolated to 500V Ground RS232 COMMS 4 AA Lithium Battery x Ground 2 110 mm o o 4 Around 1 out 2 o 3 Ground Wake Caution To avoid damage use 6 Volt lead acid battery only ensure correct polarity before connecting the battery 6 9V Switch Mode Regulator 9 2mV C AC DC Power 6 9V External Battery Protection 0 220 Connections Circuit Bat Gnd Simplified Power Supply Schematic RS232 COMMS Port Isolated tja Analog Input R 5 volts switched 3 Digital O Weight 1 5kg 2 Counters Wiring Power External AC Power External DC Power Dip Switch Shown set to the factory defaults Country US 60Hz on Other 50Hz off Page A1 Country Setting The Country Setting determines the default integration period 16 7mS for US and 20mS for others for the analog to digital converter and the default date format see Date on page 6 Baud Rate and Address The datafaker 51 RS232 COMMS port baud rate must match that of the host computer See COMMS Port on page 13 If either 300 or 9600 baud is selected the on lower circuit board
3. Appendix datalaker Introduction Each model in the datalaker data logger range has a number of characteristics that differentiate it from the other models This Appendix describes these characteristics for the datalaker 51 Analog Inputs 1 differential or 3 single ended can be used in any mix Sampling rate 25 samples sec Input impedance 1MQ or gt 100 MQ selectable Common mode range 3 5 VDC Common mode rejection gt 90 db 110 db typical Series mode line rejection gt 35 db Sensor excitation of 4 5V 250 0uA or 2 500mA each channel Full half and quarter bridges voltage or current excitation Multiplexer type solid state CMOS For each analog input type the datalaker 57 provides three decade ranges which are selected automatically Input Type Channels Range Units Resolution Diff SE DC Voltage 1 3 25 mV 1uV 250 mV 10V 2500 mV 100uV DC Current 1 4 0 25 mA 200nA 2 5 mA 14A 25 mA 10A Resistance 1 2 10 Ohms 0 5m Q 100 Ohms 5mQ 500 Ohms 50mQ 7000 Ohms 500mQ Frequency 1 2 0 1 20 000 Hz 0 01 Diff refers to differential or double ended channels and SE refers to single ended channels see Glossary on page 23 Digital Inputs and Outputs 4 TTL CMOS compatible digital input channels for digital state digital events low speed counters 10 Hz 16 bit presettable Digital input terminals are shared with digital output channels 4 Digital open collector outputs
4. rated to 200mA at 30V 3 high speed counters 1KHz or 1MHz 16 bit presettable All analog channels may also be used as digital inputs with a user definable threshold Input Type Channels Range Digital Bit 4 Oor 1 State Digital Nibble 1 0 to 16 State LS counter 4 65535 Counts HS counter 3 65535 Counts Power Supply and Battery aiso page 15 The datalaker 51 can be powered as follows Source Range Terminal Terminal AC 9 18Vac AC DC AC DC DC 11 24Vde AC DC AC DC DC 11 24Vdce AC DC Gnd 9V Alkaline Battery 6 2 10Vdc Alkaline Bat 6V Gel Cell Battery 5 6 8Vdc Lead Bat The external 6 Volt gel cell connection provides temperature compensated charging with voltage 6 90V and current 1A limiting for a three cell battery when an external AC or DC power supply is also connected When the dataTaker 57 is powered by a 9V alkaline battery and an external AC or DC source the 6 9V regulator s see schematic output is increased to 10V so that power is drawn from the external source in preference to the battery DT51 COMMS Port also page 13 The datal ker 51 RS232 COMMS Port is serial RS232 compatible The output signal level is approximately 4 Volts allowing communications N C over distances in access 100 meters at 1200 baud N C Greater distances are possible at 300 baud The RxD maximum practical distance is also dependent on N C the host computer s RS232
5. to 0 7 Power Consumption The dataTaker 57 will consume very little power if it is allowed to sleep Less power is consumed if the datalaker 57 is powered through the battery terminals rather than through the AC DC terminals because the battery charger circuit draws additional current especially if it is charging a depleted battery Power Source Condition Current typical battery battery AC DC AC DC AC DC AC DC awake 100mA sleep 0 36mA awake 105mA awake amp charging 600mA sleep 5mA sleep amp charging 500mA
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