PureAire 99185 Remote Digital Display Alarm Indicator Instruction Manual
- June 5, 2024
- PureAire
Table of Contents
Remote Digital Display Alarm Indicator
Part #: 99185
The Remote Digital Display Alarm Indicator provides continuous information on
the status of PureAire’s line of oxygen deficiency and carbon dioxide
monitors, O2 analyzers, or gas detectors. All PureAire safety monitors have a
built-in mA output. The Remote Display Alarm easily connects to the monitor’s
input power and mA output connection. n 18 AWG, three conductors, shielded
control and instrumentation cable, Belden 8770 or equivalent, is recommended
for the connection. The maximum permissible cable ength is 250 feet. The
Remote Display can also be connected to a programmable logic controller (PLC),
providing simultaneous alarm and status indications in multiple locations
throughout the facility. 
How to mount the Remote Display Alarm Indicator
How to wire the Remote Display Alarm Indicator
An 18 AWG, three conductors, shielded control and instrumentation cable,
Belden 8770 or equivalent, is recommended for the connection. 
Identification of switches and controls
Identification of switches and controls
-
Alarm Adjusting Switches – These switches are used to select the alarm level to be adjusted.
They are factory set at 19.5% for Alarm 1 and 18% for Alarm 2. (Normally set at the factory) -
Alarm Polarity Switches – These switches are used to select when the alarms will activate.
For oxygen, the alarm switches are set for “Below”. If the readings go below an ambient level, (i.e. 19.5%), then the internal horn and LEDs will activate. When used with our toxic gas monitors, the polarity is set to “Above”. (Normally set at the factory) -
Range Auto Adjustment Switches – These switches are used to adjust the zero and full-scale reading on the Remote Display Alarm Indicator. When sending a 4mA and 20mA signal from your monitor, pushing these switches will automatically adjust the zero and full-scale readings on the Remote Digital Display.
-
Alarm Adjusting Buttons – These buttons are used to increase, (UP) or decrease (DOWN)the alarm settings.
PureAire Monitoring Systems, Inc. -
Horn On/Off Switch – This switch is used to turn the internal audio horn on and off. In the On position, any alarm will activate the audible horn. To disable the internal horn, turn the switch to Off.
How to Setup and Operate the Remote Display
CAUTION: Entering the set-up menus will disable the real-time oxygen
readings
After wiring the remote display to your monitor, turn on the power to your
monitor. During the warmup, the remote display will illuminate a yellow fault
LED and the display will read FLt, (indicating that the monitor is in fault).
This will clear after the monitor completes the 4-minute warm-up. 
How to set the zero and full-scale range
This will need to be set up in the field to adjust to the length of cable
between the monitor and the remote display alarm indicator. To perform this in
the field, using the wand, first, hold the wand at the NEXT key for five
seconds until the screen appears requesting a special key sequence (wand over
UP four times) and go to “Output Zero” by wanding DOWN and then wanding EDIT.
Select CHANNEL 2 by wanding DOWN and then EDIT. You will see the first screen
below. This sends a 4mA signal to the remote display. On the back of the
remote display push the ZERO button for 3 seconds. You’ll see the display
reset and automatically adjust itself to the new zero. If necessary, you can
wander over UP/DOWN to fine-tune the zero reading. NOTE: Both AL1 and AL2 LEDs
will be illuminated. To exit the Zero menu, wand over NEXT. 
Wand DOWN to “Output Span” and then EDIT. This sends a 20mA signal to the remote display. On the back of the remote display push the SPAN button for 3 seconds. You’ll see the display reset and automatically adjust itself to the new span. If necessary you can wand UP/DOWN to fine-tune the full-scale reading. When done, wand NEXT, and the monitor will reboot.
CAUTION: If the monitor is in the measuring mode and the ZERO push button is pressed “Err” will be displayed on the remote display and no readings will be recorded. If the SPAN button is pressed in the measuring mode, the remote display will automatically adjust to 100%. You will need to repeat the above adjustment procedure again for the remote display to mirror the monitor. NEVER PUSH THE SPAN button in the measuring mode.
How to set the internal alarms on the Remote Display
The Remote Display has two user-selectable alarms with a separate horn tone to
identify Alarm 1 from Alarm 2. Both alarms, unless specified otherwise, are
preset at the factory as
LEL 0-100%: AL1 = 20% and AL2 = 40% *Please note that alarm levels can be
changed in the field.
To set Alarm 1, Press Alarm 1 for two seconds to enter the alarm change mode.
The display will show the current alarm setting and the right-most decimal
point will be lit. Use the UP or DOWN buttons to increase or decrease the
alarm value. When done, push the Alarm 1 button for 2 seconds to get back to
the monitoring mode.
To set Alarm 2, Press the Alarm 2 button for two seconds to enter the alarm
change mode. The display will show the current alarm setting and the left-most
decimal point will be lit. Use the UP or DOWN buttons to increase or decrease
the alarm value. hen done, push the Alarm 2 button for 2 seconds to get back
to the monitoring mode.
PureAire Monitoring Systems, Inc.
1140 Ensell Road
Lake Zurich, Illinois 60047
Phone:847-726-6000
Fax:847-726-6051
Toll-Free:888-788-8050
www.pureairemonitoring.com
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PureAire 99185 Remote Digital Display Alarm
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Alarm Indicator
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