30
Locking System Mode Settings
It is possible to 'lock’ the system settings so that these cannot be tampered
with or altered accidentally during use. This is important, for example, where
it is necessary to verify that tests have actually been carried out at a
particular time or date, or where procedures always require the use of a
sample number or dilution factor.
The instructions for locking the settings are not included in this manual, these
are provided to registered Palintest distributors. If the photometer SYSTEM
mode settings appear to be locked, refer in the first instance to your local
distributor.
Time-Out
As a power-saving measure, in normal use, the photometer automatically
switches off five minutes after the last key is pressed.
The photometer may be switched to ‘Long’ time-out which allows 15 minutes
before shut-down or ‘Off’ which allows continuous use. This is particularly
useful when powering the instrument through the USB interface.
USB
The USB interface allows communication between the instrument and a PC.
Once the computer and instrument are connected by the USB cable, there is
a choice of two operating modes – Hard Drive and COM Port.
In Hard Drive mode, the instrument appears as a removable hard drive when
connected to a PC. No additional software is required on computers running
Windows 2000, ME or XP. A driver to use this option with Windows 98SE is
available from your local distributor.
In COM Port mode, the instrument behaves as if connected to the PC serial port
via RS232. This allows backwards compatibility with software written for earlier
models of Palintest instruments. In this mode, the PC requires installation of a
USB virtual COM Port driver, available from your local distributor.
See the section on ‘Interface Connections and Data Memory’ for full
instructions.
Summary of Contents for Pooltest 25
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