Hydrological Services Pty Ltd
Data Logger Model ML1-420
© Copyright
ML1-420 100-2 Issue 1.00 6 Apr, 2011
TABLE OF CONTENTS
1. Introduction ......................................................................................................... 3
2. Product Overview ................................................................................................ 4
2.1 Overview ............................................................................................................... 4
3. Installation ............................................................................................................ 4
3.1 Hardware Connections ....................................................................................... 5
3.1.1 Contact Closure input ......................................................................................... 6
3.1.2 External Power Supply ....................................................................................... 6
3.1.3 4-20mA Transducer Input .................................................................................. 7
3.1.4 Communications .................................................................................................. 7
3.2 Setup and Configuring the Logger .................................................................... 9
3.2.1 Site Information ................................................................................................... 9
3.2.2 System Time/Date ................................................................................................ 9
3.2.3 Sensor + Parameters ............................................................................................ 9
3.2.4 Communications .................................................................................................. 10
4. Operation .............................................................................................................. 11
4.1 Commands / Syntax ............................................................................................. 11
4.1.1 On-line Help (?) ................................................................................................... 11
4.1.2 Communications (BAUD, EV, RE, CLEAR) .................................................... 12
4.1.3 Battery Voltage (BV, BVINT) ............................................................................ 13
4.1.4 Temperature (TEMPC) ...................................................................................... 13
4.1.5 Digital Channel Parameters (CHID, INC, TDAY, TOT, TYPED, UD) ......... 14
4.1.6 4-20mA Channel Parameters (CHIDRV, RVHR, TXI, …..U420, WL) ......... 15
4.1.7 Date/Time Parameters (D, FMT, T, TA) ........................................................... 17
4.1.8 Dump Log Records (DUR, DURV, ….DUALL, CLR, CLRV, MW, LOG) .. 18
4.1.9 Miscellaneous (ID, SI, PASSWD, BYE, SLEEP, RESET, VER) .................... 21
4.1.10 Status Window (ST) ............................................................................................... 22
4.2 Data Output Format ............................................................................................ 24
4.2.1 Dump Log Record ............................................................................................... 24
5. Specification ......................................................................................................... 27
5.1 Hardware Specification ....................................................................................... 27
5.2 LED Indicator ...................................................................................................... 28
5.3 External Contact Interface ................................................................................. 28
5.4 4-20mA Interface ................................................................................................. 28
5.5 Communications Interface.................................................................................. 28
5.6 Watchdog .............................................................................................................. 28
6. Fault Finding ........................................................................................................ 30
Appendix A. Interfacing to a Modem .................................................................................. 32
Appendix B. Installing a RainTrak System ........................................................................ 35
Appendix C. Surge Protection .............................................................................................. 37
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