OTIS GenII WireFree OI-6900 User manual

Model OI-6900 Sensor Assembly
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Operation Manual
Revision 2.3w
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Product Overview
The Otis Instruments, Inc. GenII WireFree OI-6900 ambient air gas sensor assembly is a WireFree gas sensor assembly that uses an electro-
chemical sensor element to detect a variety o gases. The device comes standard with a 102 x 64 graphical LCD screen, Otis Instruments standard
three-button inter ace, Otis-blue custom explosion-proo enclosure, non-intrusive magnetic switches, and radio (900MHz or 2.4GHz).
The OI-6900 is designed to be sel -contained and to last rom 6-12 months on a single battery (time varies depending o amount o gas detected).
The device has been designed to reject EMI and other orms o inter erence in order to avoid alse gas readings.
The OI-6900's key eature is non-intrusive calibration and con iguration. With all adjustments made at the sensor assembly, one-man non-intrusive
calibration is quick, easy, and allows the sensor housing and enclosure to remain Class I, Division 1, Group C and D certi ied while in the ield.
Non-intrusive calibration is made possible by using an Otis Instruments, Inc. distributed magnet to activate the MENU, ADD, and SUB buttons.
The device is sel -contained and battery operated. The sensor unctions by transmission o radio wave messages to the OI-7010 (or any Otis
receiving controller) every minute when there is no gas present, and every ive seconds when gas is present (and above the background gas level
setting).
The device is ield adjustable or background gas, and addressable to eliminate inter erence with other systems. Since each system's address is
ield adjustable, any OI-6900 sensor may be used as a replacement.
Features such as auto-setting Null, relay/alarm tests and battery voltage indication make this device a truly remarkable gas detection system.
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Table of Contents
Product Overview.......................................................................................................................................2
Introduction................................................................................................................................................ 4
Warnings..................................................................................................................................................... 5
Complete System Diagram........................................................................................................................ 6
Complete System (External)...............................................................................................................................................6
Complete System (Internal)............................................................................................................................................... 7
Power On from Power Off Mode)........................................................................................................... 8
Power Off ................................................................................................................................................. 10
Normal Operating Mode......................................................................................................................... 12
Basic Menu Mode ....................................................................................................................................13
Calibration................................................................................................................................................ 13
Nulling the Sensor............................................................................................................................................................13
Calibration (Auto Cal)..................................................................................................................................................... 16
Calibration ( anual Cal)................................................................................................................................................ 20
Setting Radio Address...................................................................................................................................................... 23
Advanced Menu Mode.............................................................................................................................25
Relays/Alarms Test Setting ..............................................................................................................................................25
Setting Network ID ..........................................................................................................................................................26
Diagnostics....................................................................................................................................................................... 27
Last Setup Times.............................................................................................................................................................. 28
Unit Info........................................................................................................................................................................... 28
Background Gas Setting ................................................................................................................................................ 29
Calibration ethod Setting ............................................................................................................................................30
Setting LCD Contrast....................................................................................................................................................... 30
Restore to Factory Default...............................................................................................................................................31
Battery Replacement................................................................................................................................34
Sensor Replacement................................................................................................................................. 38
Antenna Replacement..............................................................................................................................40
Appendix A: O2 Sensor Information.....................................................................................................42
Null................................................................................................................................................................................... 43
Background Gas Setting.................................................................................................................................................. 43
Exiting enu ode......................................................................................................................................................... 43
Response Time.................................................................................................................................................................. 43
O2 Percentile Range.........................................................................................................................................................43
Appendix B: OI-6900 Troubleshooting Guide......................................................................................44
Specifications............................................................................................................................................ 47
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Introduction
This document is an Operation Manual containing diagrams and step-by-step instruction or proper operation o the Otis
Instruments, Inc. WireFree Model OI-6900 Sensor Assembly. This document should be read be ore initial operation o the
product.
Should a question arise during the use o the product, this document will serve as a irst re erence or consultation. I
urther questions arise, or i the device is not working properly, please contact the sales representative o this product.
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Warnings
CAUTION: THE INTERNAL COMPONENTS CAN BE STATIC SENSITIVE. USE CAUTION WHEN
OPENING THE ENCLOSURE AND HANDLING INTERNAL COMPONENTS.
Do not open the enclosure when the device is energized.
Do not open the enclosure i an explosive gas atmosphere may be present.
The Otis Instruments WireFree OI-6900 Sensor Assembly is Class I Division I, Groups C&D
Certi ied. The assembly is able to maintain its certi ication at all times while in the ield,
simply by using the non-intrusive calibration method which requires the use o an Otis
Instruments, Inc. distributed magnet. However, i the Moore lid is removed, or whatever
reason, the OI-6900 certi ication is not valid. To avoid invalidating the certi ication, once the
device is put in the ield, always use the Otis Instruments, Inc. distributed magnet to ensure
non-intrusive calibration.
Strong magnetic ields may inter ere with the non-intrusive magnetic switches. A strong
magnetic ield may momentarily active a switch, or permanently disable the switch to the “on”
or “o ” position.
Do not cover the hole in the calibration cup, as this will cause the calibration to be inaccurate.
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Complete System Diagram
The ollowing diagrams should be consulted or identi ication o the system and all parts that may be re erred to in this Operation Manual.
Complete System (External)
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Complete System (Internal)
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Power On (from Power Off Mode
Powering on the device activates its unctions. When powered on, the device is ully unctional and access to system and
settings menus is allowed.
1. Locate ADD on the Front Panel.
2. Touch an Otis Instruments, Inc. distributed magnet to the le t side o the device to activate ADD (and turn on the
device).
NOTE: When the magnet tou hes the devi e and a onne tion has been made a trapezoid will appear.
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Power On ont...
3. The device will then count down rom 60 to 0.
From 60 to 30, the Display Screen will show the Otis Instruments, Inc. logo.
From 30 to 0, the Display Screen should resemble the ollowing illustration:
4. When “0” is displayed, the device is in Normal Operating Mode and ready to operate.
NOTE: If the devi e is in Fault (in this example, Fault 14), the Display S reen will resemble the above
illustrations:
For additional in ormation regarding system aults, see the OI-6900 Troubleshooting Guide on page 44.
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Power Off
Powering o the device shuts down the sensor assembly. When powered o , the device is no longer transmitting signals
so the receiving controller will display “Fault 9” or that sensor channel.
1. Locate SUB on the Front Panel.
2. Touch and hold an Otis Instruments, Inc. distributed magnet against the right side o the device or our seconds to
activate the SUB button (which turns the device o ).
NOTE: When the magnet tou hes the devi e and a onne tion is made, a trapezoid will appear on the display
s reen.
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Power off ont...
3. When powering o , the display screen will switch rom showing “0” to “OFF”. The display will continue to show
“OFF” (when power is being supplied to the unit) until the device is powered on.
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Normal Operating Mode
When powered on, the device will enter and remain in Normal Operating Mode until commanded otherwise. The presence
o gas will a ect the transmission o signals to the receiving controller in the ollowing ways.
●When the device is in Normal Operating Mode, and there is no gas present, the sensor will send a message to the
receiving controller every minute (approximately) to indicate that the system is in working order.
●When gas is present, and above the Background Gas Level, the device will report to the receiving controller every
six seconds.
●When the gas level alls below the Background Gas Level the device will return to reporting every minute
(approx.).
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Basic Menu Mode
The Basic Menu Mode should be used to set the basic settings o the OI-6900 be ore initial use, and/or to adjust the basic
settings to accommodate use. Basic Menu Mode options include: Null, Calibration, and Setting Radio Address.
Calibration
System calibration is necessary or the device to accurately sense gas and to send messages to the transmission controller
in relation to gas presence in parts per million. Each time a sensor is replaced the device must be re-calibrated.
The Model OI-6900 is equipped with a dual set o switches or MENU, ADD and SUB. The manual and magnet switches
are located on the Front Panel. Manual switching may be used in calibration when the Moore explosion-proo enclosure
lid is removed. The magnet switches, or non-intrusive calibration, are activated by an Otis Instruments, Inc. distributed
magnet.
NOTE: Do not over the hole in the alibration up, as this will ause the alibration to be ina urate.
NOTE: Calibration must be performed using a 0.25 LPM (liters per minute) flow regulator (OI-556-R) and a
alibration up (OI-410).
NOTE: If the OI-6900 times out of Calibration Mode when set to Auto Cal, it will start at the initial s reen
when returning to Calibration Mode (instead of the s reen that was last displayed).
Nulling the Sensor
NOTE: When using an O2 sensor, the nulled reading will be 20.9.
1. Touch an Otis Instruments, Inc. distributed magnet against the top side o the device to active MENU and enter
Setup Mode.
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Nulling the Sensor ont...
2. Touch the magnet to MENU once.
3. The display screen should resemble the ollowing illustration:
NOTE: A message will be sent to the re eiving ontroller indi ating that the sensor is in Null Mode..
4. As the Display Screen instructs, press ADD to auto null.
5. The Display Screen will then show:
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Nulling the Sensor ont...
6. Press ADD or “yes” or SUB or “no”.
NOTE: If too mu h time elapses between when ADD is pressed and when the question regarding lean air is
answered, the devi e will default ba k to the primary Null s reen. If this o urs, simply press ADD again.
7. The Display Screen should resemble the ollowing illustration (as the device counts down rom 6 to 0):
8. Once the device has been Nulled, the Display Screen should resemble the ollowing illustration:
9. Once the Null is set, proceed to the next step.
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Calibration (Auto Cal)
NOTE: When using the Auto Cal method, the alibration gas should be less than full s ale of the sensor.
1. A ter the Null has been set (see above), touch an Otis Instruments, Inc. distributed magnet to the top side o the
device to activate the MENU button.
2. The display screen should resemble the ollowing illustration:
3. Touch the magnet to ADD (“Yes”) or the device to calibrate, or SUB (“No”) to return to Normal Operating Mode.
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Calibration ont...
4. The display screen should resemble the ollowing illustration:
5. Touch the magnet to ADD (“Yes”) or the device to begin Auto Cal, or SUB (“No”) to return to Normal Operating
Mode.
NOTE: If “Yes” is hosen, the devi e will be alibrated. To stop alibration after this point, the battery
must be unplugged.
6. The display screen should resemble the ollowing illustration:
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Calibration ont...
7. The %LEL displayed on the screen should match that o the calibration bottle. Touch the magnet to ADD to
increase the reading displayed on the screen by 1% LEL, or SUB to decrease.
8. Once the %LEL displayed on the screen matches that o the calibration bottle, touch the magnet to MENU.
9. The display screen should resemble the ollowing illustration:
10. Unscrew and remove the sensor rainguard rom the sensor housing.
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Calibration ont...
11. Replace the sensor rainguard with an Otis OI-410 Calibration Cup.
12. Apply a known calibration gas to the OI-410 Calibration Cup that is attached to the sensor housing.
13. Touch the magnet to MENU.
14. The display screen should resemble the ollowing illustration, counting down to begin Auto Cal.
15. Once Auto Cal is complete, the OI-6900 will display the caled “Reading: ___”.
16. Unscrew the OI-410 Calibration Cup.
17. Reattach (screw on) the sensor rainguard to the sensor housing.
18. Once Calibration is complete, proceed to the next step.
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