In Continuous mode both the time (minutes) and the conc. Level are used. If the concentration should reach
the level specified, the timer will start and count down from the time specified to zero before advancing the
tape.
WARNING – When tape saver mode is active the actual gas concentration may not be displayed. Anytime the
counter (in seconds – see figure 5.16) is counting down to zero NO ANALYSIS IS BEING PERFORMED and the
concentration displayed may not be accurate.
While tape saver mode is enabled the letters ‘TSM’ will always appear on the analysis screen.
Figure 5.16
Example using figures 5.15 and 5.16: When the values displayed in figure 5.15 are entered and TSM is
enabled (ON), a gas concentration reading of 100.3 would start the TSM counter and freeze the concentration
reading at 100.3 ppb. (see figure 5.16) Regardless of the amount of gas present during this time the counter
will start at 300 seconds and countdown to 0 before advancing the tape and calculating a new gas
concentration.
After the tape advance the CL1/CL2 will again monitor for gas and display the calculated value. If the new
calculated value is below the TSM concentration the concentration displayed will begin to update
appropriately. Once the gas concentration reaches 100.0 the timer will start again, and the value will remain
at the last calculated concentration.
5.6.3 Latching Relays
(Default Configuration: ON)
Press the upper left soft key to toggle the latching relays on and off. The display adjacent to the soft key
always displays the current state of the relays. (ex: in figure 5.17 the relays are currently non-latching).
Figure 5.17
Latching relays will cause a gas alarm relay to remain active even if the gas concentration drops below the
alarm level until it is acknowledged. If the relays are set to non-latching the output the relay outputs will
toggle on and off as the gas concentration goes above and below the corresponding alarm level.
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