Metek 920, Operator'S Manual With Essential Health And Safety Requirements

Page: 143 / 278

Controller / User Interface | 4-35
CAL Mode – F3 Commands
Keystroke Term Definition
F3 • — —
F3 – — —
F3 y Timery Sets the duration the solenoid valve controlling the Zero or Calibration gas connected to
SSR output ‘y’ is energized during the Auto-Zero, Auto-Span, and Auto-Calibration func-
tions, where ‘y’ = F3 0..F3 2 .
F3 0 = Timer0
F3 1 = Timer1
F3 2 = Timer2 – Used only with O
2
Sensor (General Purpose applications)
Timer0 is the Zero solenoid timer, while Timer1 and Timer2 are Calibration gas mixture
solenoid timers. The duration can be set from 0–255 minutes in one-minute increments.
Setting the timer to ‘ 0 ’ turns it off.
F3 3 PrbTz The Probe Blow-Back Timers allow you to set up the Blow-Back feature for systems using
a sample probe with a Blow-Back function (optional), where ‘z’ = 1..3.
1 = PrbT1: The Probe Blow-Back Interval timer allows you to enter the interval-
time between Blow-Backs (minutes). When an interval-time is entered, it is
displayed along with a countdown timer (time remaining until the next Blow-Back).
2 = PrbT2: The Probe Blow-Back Duration timer allows you to enter the duration
of each Blow-Back (seconds).
3 = PrbT3: The Probe Blow-Back Pulse Width timer allows you to enter the duration
(in seconds) the analyzer will allow the Blow-Back system to build up pressure
between pulses (air bursts, which blow back debris into the stack).
F3 4 — —
F3 5 — —
F3 6 IntTime Sets the duration (seconds) over which the reading for each Manual Zero or Span is aver-
aged. Setting the timer to ‘ 0 ’ turns the function off.
F3 7 SDelay Sets the time delay for the CAL relay to continue indicating that a calibration is in progress
after the calibration is complete. This permits a smooth transition from the Zero/Span gas
back to the sample gas. The delay can be set from 0–255 minutes in one-minute incre-
ments. Setting the delay to ‘ 0 ’ turns the function off.
The delay also occurs when exiting CAL or CFG mode.
F3 8 AZInt Sets the time interval (hours) between Auto-Zeroes. This allows Auto-Zero to be performed
more frequently than Auto-Calibration. The interval can be set from 0–999 hours in one-
hour increments. Setting this interval to ‘
0
’ turns the function off.
The Auto-Zero function will be included in the Auto-Calibration sequence if Auto-Zero is
enabled and
Timer0
duration is not ‘
0
’.
Also displays the time remaining until the next Auto-Zero (hours and minutes).
F3 9 ACal The Auto-Calibration Interval setting sets the duration (hours) between Auto-Calibrations.
The interval can be set from 0–999 hours in one-hour increments. Setting this function to ‘ 0 ’
turns it off.
Also displays the time remaining until the next timed Auto-Calibration (hours and minutes).