Xylem iRIS 150 GPRS DATALOGGERS - Manual (Page 43)

37 – IRIS 150 V1.11 User Guide
iQuest (NZ) Ltd - PO Box 15169, Hamilton, New Zealand Tel: +64 7 857-0810 Fax: +64 7 857-0811 Email: [email protected] 37
8 Troubleshooting
This section offers possible answers to some common installation and/or configuration issues.
8.1 The LCD display is blank
If the unit is operating under external power, the LCD is permanently on. If the unit is operating from its
internal battery, the LCD is automatically turned off if the keypad has not been activated for 15 seconds.
Simply press any key to ‘wake-up’ the display.
8.2 Can not communicate via the RS232 port
Several issues can cause the communication not to work correctly. The most common, with likely solutions
are listed here:
Problem Possible Solution
Incorrect or faulty cable Use null modem cable. Must have GND, RXD/TXD and DTR/DSR lines
Port settings incorrect Settings are 38400bps, 8 data bits, no parity, 1 stop bit
Software not asserting DTR For HyperTerminal® check the flow control is set to “None”
For iLink, check communication mode is ”Direct RS232” not “Radio/RS485”
For iTerm the port always asserts DTR, so this does not apply.
iLink - terminal mode works,
but native binary mode does
not. Check communication address. All iRIS 150s are shipped with a comms
address of 1. However, also try the universal address of –3.
RS232 port is in telemetry
mode If the house icon is visible on the top of the LCD, the unit has been
configured for telemetry operation. This means the unit is in a fixed speed
(either 1200bps or 9600bps). To temporarily revert it to the standard
“laptop” mode, press any key on the keypad. The house icon will disappear
and the port will operate in normal terminal or unload mode at 38400bps.
Telemetry mode will resume after an idle period where no key is pressed or
terminal activated.
8.3 The LCD screen for resetting totals is not available
The menu option for resetting totals is not displayed unless an authorised user is logged in via the LCD and
keypad. The mode can be changed via a terminal session. However, the totals can be reset via a terminal
session even if the logger is in secure mode.
8.4 The iRIS does not log correctly if continuous scan mode is selected
To use continuous mode, the iRIS must have an external dc supply connected. If this is not provided, the
logger will revert to event mode in an attempt to minimise internal battery consumption. This will impact on
analogue measurements in particular and the results will be erratic.
8.5 Some samples are not logged in timed scan mode
The log rates of all sensors must be the same as or a multiple of the scan rate. If the log rate cannot be
exactly divided by the scan rate, some or all of the samples will not be logged. See Section 6.3.3 for more
details.