Metex 8760CLP Total Free Chlorine & pH Analyzer - Manual (Page 48)

AQUAMETRIX INC.
1-800-742-1413 www.aquametrix.com
48
Metric or Imperial Units
By default the analyzer will use metric units. This means that temperature will be displayed using
degrees Celsius and that the prompt for the temperature input will be [°C]. The analyzer can also be
made to use imperial units as the preferred unit. Using imperial units, temperature will be displayed
using degrees Fahrenheit in the sample menu and the prompt for the temperature input will be [°F]
instead of [°C] throughout the program.
For practical reasons, the temperature input is identified as [°C] throughout this instruction manual and
in the menus.
To select imperial units for the analyzer, select [unit] from the configuration menu, then go into edit
mode and change the [°C] prompt to [°F].
Input Damping
The chlorine, pH and temperature measurements can be damped to deal with rapidly-varying or noisy
signals. Damping range is selectable between 3 s to 99 s. With 0 seconds, each reading is used to
directly update the display and 4 mA to 20 mA output. The factory default of 5 seconds adds the next 4
seconds of readings to the first and divides by five; this gives fast response. Selecting 99 seconds
provides a smooth damping out of turbulent readings. Any selection between 3 s and 99 s can be made.
Select [CONF] [in] from the menu. Using Up or Down arrow key find the desired input and press
SELECT. Using Up or Down arrow key find [dA] and press SELECT. Press ENTER to get into edit
mode and change the damping value to the new value. Press ENTER to accept the change and leave edit
mode.
Real-Time Clock
All AquaMetrix analyzers have an internal clock used for date/time stamping of system events and the
internal data log. On power outage, the clock stops,
then it continues where it left off when power
returns.
When the 8760CLP is purchased with option -13, a real-time clock will maintain the correct time and
date even with the power turned off. To check if your analyzer has a real-time clock, select [CONF]
[rtc] [CHIP] from the menu. If the display shows [YES], then there is a real-time clock. If the display
shows [no] you can still set the date/time clock, but the time and date will need to be adjusted each time
the analyzer loses power.
To set the real-time clock, select [CONF] [rtc] from the menu. Set the year, month, day (of the month),
hour, minute, and second.
Electronic Calibration of Inputs
Adjustments to the input circuits of chlorine, pH and temperature can be made both electronically and
by making software adjustments.
The program adjustments are made using the configuration section of the menu, ie. by selecting [CONF]
[in] and then the appropriate input from the menu. The procedures are described in detail in the
Electronic Hardware Alignment section.