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MODEL TCL SECTION 7
PROGRAMMING THE ANALYZER
7.4.5 Procedure – Synchronizing Timers
1. Synch Timers is available only if two or more alarm relays have been configured as interval timers.
2. Press MENU. The main menu screen appears. Move the cursor to
Program and press ENTER.
3. Choose Alarms.
4. The summary display shows the current Synch Timers setting, (Yes or
No)
To make a change, choose Synch Timers and press ENTER. A screen
will appear in which the present setting can be edited. Press ENTER to
store the setting.
For an explanation of terms, see sections 7.4.1 and 7.4.2.
5. To return to the main display, press MENU then EXIT.
Alarms
Configure/Setpoint
Simulate
Synch Timers: Yes
Synch Timers:
Program
Outputs
Alarms
Measurement
Temperature
Alarms
7.5 CONFIGURING THE MEASUREMENT.
7.5.1 Purpose
This section describes how to do the following:
1. Program the analyzer to measure total chlorine. This step is necessary because the analyzer can be used
with other sensors to measure other chlorine oxidants.
2. Set the level of electronic filtering of the sensor current.
3. Set the display resolution.
7.5.2 Definitions
1. CHLORINE OXIDANTS. Although the TCL is used to measure total chlorine only, the 1056 analyzer used with
the TCL can be used to measure other chlorine oxidants, for example monochloramine and free chlorine.
2. FILTER. The analyzer applies a filter to the raw sensor current. The filter reduces noise but increases the
response time. The available filter(s) depend on the time setting. If the filter is between 0 and 10 seconds, the
analyzer applies a window filter. A window filter averages the measured value within the filter time. For exam-
ple, if the filter is 5 seconds and a step increase is applied to the input, the displayed value increases linearly,
reaching the final value after 5 seconds. If the filter is set to greater than 10 seconds, the analyzer applies
either an adaptive filter or a continuous filter. An adaptive filter discriminates between noise and real process
change. It filters changes below a fixed threshold value but does not filter changes that exceed the threshold.
It is best used in situations where the noise is relatively low. A continuous filter dampens all changes. The fil-
ter time setting is approximately equal to the time constant, the amount of time required for the reading to reach
63% of the final value following a step change.
3. RESOLUTION. If the chlorine concentration is less than 1.00 ppm (mg/L), the display resolution can be set to
0.XX or 0.XXX.