PureAire Monitoring Systems 99091 User manual

Remote Display Alarm Indicator for Oxygen monitor
(Part number 99091)
The Remote Display Alarm Indicator is designed to display remote oxygen
concentration information from PureAire’ oxygen monitors. All PureAire O2
monitors have a built in 4-20mA output. The remote display alarm easily
connects to the monitor’s input power and mA output connection. An 18
AWG, three conductor, shielded control and instrumentation cable, Belden
8770 or equivalent, is recommended for the connection. The maximum
permissible cable length is 250 feet. You can simultaneously connect one
remote display to one Air Check Oxygen monitor and one programmable
logic controller, PLC.
PureAire Monitoring Systems, Inc.
557 Capital Drive
Lake Zurich, Illinois 60047
Phone: [phone]
Fax: [phone]
Toll-Free: 888-788-8050
pureairemonitoring.com

How to mount the Remote Display Alarm Indicator
1) Open the two side
doors to expose the
front panel screws.
2) Loosen the 4 screws
to separate the front
panel from the case.
Mount the case to a wall or other
flat surface. There are 4ea. through
holes for fastening the case.
The case is designed to be flush
mounted.
NOTE: The front cover can be
removed from the case by gently
pulling on the plastic hinges. (they
will stay connected to the front
cover.
To connect the front cover, just
push the plastic hinge into the case.

How to wire the Remote Display Alarm Indicator
Identification of switches and controls
1. Alarm Adjusting Switches –These switches are used 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)
2. 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
ambient, 20.9% then the internal horn and LED’s will activate. When used with our toxic
gas monitors, the polarity is set to “Above”. (Normally set at the factory)
3. 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
Max distance 250 feet
CAUTION: Make all wire terminations with
the power OFF. Failure to do so can damage
the oxygen monitor and remote display and
void your warranty.
18 AWG, three conductor,
shielded control and
instrumentation cable,
Belden 8770 or equivalent
24VDC Power Supply
Ground and
shield are
tied together
mA
When connecting
to PLC, remove
jumper and connect
MA to PLC+ and
SHIELD to PLC-.
Do not remove
jumper unless
connecting to
PLC.

signal from your oxygen monitor, pushing these switches will automatically adjust the
zero and full scale readings on the Remote Digital Display.
4. Alarm Adjusting Buttons –These buttons are used to increase, (UP) or decrease
(DOWN) the alarm settings.
5. 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 Oxygen monitor, turn on the power to your oxygen
monitor. During the warm up the remote display will illuminate a yellow fault LED and the
display will read FLt, (indicating that the oxygen monitor is in fault). This will clear after the
oxygen monitor completes the 4 minute warm-up.
0
1. Alarm
adjusting
switches
2. Alarm
Polarity
switches
3. Range auto
adjustment
switches
Do not remove
jumper unless
connecting to
PLC.
4. Alarm
adjusting
buttons
5. Horn On Off
Switch
During warm up After 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 oxygen
monitor and the remote display alarm indicator. To perform this in the field, first enter the
password on your oxygen monitor and select the “Set 4-20mA loop” menu. (See Section 5.5.1
Set 4-20mA loop in your oxygen manual).
On your oxygen monitor, use the joystick to select “Set 4mA Zero”. 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
push the joystick up or down to fine tune the zero reading.
NOTE: Both AL1 and AL2 LED’s will also be illuminated.
Once adjusted, use the joystick to select
“Set 20mA Span”. 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 of 25%. If necessary you can push the joystick up
or down to fine tune the full scale reading.
NOTE: To fine tune the reading to match the
reading on the oxygen monitor, use
the “Set 20mA Span” menu. Push the
joystick up or down until both displays match.
CAUTION: If the oxygen monitor is in the measuring mode and the ZERO push button is
pressed an “Err” will be displayed on the remote display and no readings will be recorded. If the
SPAN push button is pressed in the measuring mode, the remote display will automatically
adjust to 25.0%. You will need to repeat the above adjustment procedure again for the remote
display to mirror the oxygen monitor. NEVER PUSH THE SPAN 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 are preset at the factory; AL1 = 19.5% and AL2 = 18%. They 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. When done, push the Alarm 2
button for 2 seconds to get back to the monitoring mode.