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3. Press ENTER to accept the new entry or select
ESC to revert to the previous setting.
7.9. Zone Hold Mode
A zone can be placed on hold and continuously mon-
itored for a length of time determined by the Zone
Hold Time value. To place a zone on hold:
1. Select the zone at the top level screen.
2. Press and hold down the ENTER key until the
unit beeps. The word HOLDING will appear
in the status box.
3. While in the hold mode, further investigation
of the zone's status can be made by navigating
to that zone's Setup Screen 1.
4. To release the zone from the Hold Mode, press
and hold down the ENTER key until the unit
beeps and the screen display returns to normal.
7.10. Zone Hold Time
Sets the length of time a zone will be monitored when
the Zone Hold feature is activated. The default is 15
minutes. The range is 1 to 999 minutes.
1. Press the ENTER key to adjust this setting.
2. Use the left/right cursor keys to move across
the entry field and the up/down cursor keys to
modify the individual numbers.
3. Press ENTER to accept the new entry or ESC
to revert to the previous setting.
7.11. Detection Limit
Detection Limit is a squelch setting that instructs the
instrument to interpret PPM readings below the des-
ignated level as 0. The range is 1 to 99 PPM.
1. Press the ENTER key to adjust the setting.
2. Use the up/down cursor keys to modify the
setting.
3. Press ENTER to accept the new entry or select
ESC to revert to the previous setting.
Zone Hold Mode
7.12. Loop2 Factor
Loop2 Factor sets the PPM scale factor for current
loop number 2. To calculate the current output,
multiply the scale factor by the PPM and add four (4).
For example, at the default scale factor of 0.016, a
measurement of 100 PPM would generate a current
output of 5.6 mAdc. The current output cannot exceed
the 20 mAdc capacity of the interface.
1. Press the ENTER key to adjust the setting.
2. Use the left/right cursor keys to move across
the entry field and the up/down cursor keys to
modify the individual characters.
3. Press ENTER to accept the new entry or select
ESC to revert to the previous setting.
7.13. Re-Zero Mode
This parameter defines the frequency at which the in-
strument re-zeros the optical sensor.
1. Press the ENTER key to adjust the setting.
2. Use the up/down cursor keys to toggle between
settings.
AUTO - sets the instrument to re-zero every 10 min-
utes.
ZONE CHANGE - sets the instrument to re-zero at
each zone change. This is the most accurate setting,
but increases the time interval between measurement
cycles.
3. Press ENTER to accept the new entry or ESC
to revert to the previous setting.
Programming Setup and UI Navigation for RLDS - Display Screens • 29
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