Specifications

ATI Model A15/82 Fluoride Monitor with Auto-Calibration
19
O&M Manual
Rev-G (6/10)
9. SET A F.: LO (OR HI) This routine allows the function of setpoint A to be defined as either low or high.
When LO is selected, relay A acts like a low alarm, with the relay activating when the measured fluoride
is below the setpoint. When HI is selected, the relay acts like a high alarm, activating when fluoride is
above the setpoint. Setpoints are programmed in another routine described later in this manual.
10. SET B F.: LO (OR HI) This routine allows the function of setpoint B to be defined as either low or high
similar to relay A described in 7 above. Note that relay B cannot be used as an alarm relay when the
automatic calibration function is used. When the Auto Cal is activated, relay B is used for
initiating the calibration sequence.
11. AL SET A: OFF A separate alarm relay is provided in the monitor which is independent of relays A and
B. It is marked C/D on the back of the instrument. This relay can be used to actuate an emergency
alarm should the fluoride concentration remain outside of the A setpoint for some fixed period of time.
The default for this function is off. If you want to use this function, use the UP key to select ON and then
press ENTER. The display will change to “TIME SET A: 60 M”. Use the UP or DOWN key to select the
time period after which you want the C/D relay to actuate. For instance, if you have already defined
relay A as a low alarm with a setpoint of 0.50 ppm and want to activate an additional alarm if fluoride
remains below 0.5 for more than 30 minutes, press the UP key until the display indicates 30 M and then
press ENTER. This function can be extremely useful for applications where the A relay is being used for
control, since it provides an alarm if the control function does not maintain the desired value for some
period of time.
12. AL SET B: OFF This routine is similar to 8 above, but with respect to relay B. It associates the alarm
relay with the operation of relay B as described above.
13. AL CALIBR.: OFF This routine allows the alarm relay (relay C) to be used to indicate failure of the
automatic calibration sequence. Set this function to ON if you wish to use the C relay for this purpose.
14. AL RELAY: ACT (OR DEA) This routine allows the C/D relay to be defined for normal or fail-safe
operation. Select ACT (activated) for normal operation. This refers to the fact that the relay coil is not
normally energized and energizes on alarm condition. Select DEA (deactivated) for fail-safe operation.
This can be useful if this relay is to be used for a power failure indication. Note that the C and NC relay
indications on the wiring diagrams refer to the contact designations in fail-safe operating mode. If normal
operation is selected, the NC contacts become NO contacts.
15. AL TYPE: CONT or FLASH This routine gives the option, when alarm is activated, to hold the relay coil
continuously of have the coil flash (cycle between energized and de-energized). The sub menu when AL
TYPE is set to FLASH, allows for the selection of slow, med, or fast flashing.
16. CLEAN: DISABLED The automatic cleaning feature is not implemented in the fluoride monitor. This
function should not be changed.
17. CLEANING T: 15.0” Not used. Do not adjust.
18. HOLDING T: 3.O’ Not used. Do not adjust.
19. CALIBR.: AUTO This routine allows you to specify whether the automatic calibration feature will be run
automatically based on the internal timer, manually at the option of the operator, or disabled. The
default is AUTO. If you wish, you can use the UP or DOWN keys to set the calibration function to
Manual or Disabled.