RKI Instruments OX-82 Owner Manual

 Il
LEUR
- INSTRUMENTS
Gas Detection for Life!
RKI INSTRUMENTS, INC.
INSTRUCTION MANUAL
Model OX-82
The accompanying instrument is sold and serviced in the USA by RKI Instruments, Inc. Please contact RK
Instrumentsfor any follow up service needs, including questions, warranty issues, repairs, and spare parts and
sensors. Thank you for selecting this fine instrument for your use. With proper care and maintenance, it will
provide you with many years of reliable service.
RKI Instruments, Inc. e 33248 Central Avenue Union City, CA 94587 e Phone (510) 441-5656 e (800) 754-5165 e Fax (510) 441-5650
World Leader In Gas Detection & Sensor Technology
www. rkiinstruments.com
OX—82
. DETECTION PRICIPLE !
The oxygen detector is a plug-in cell assembly in a metal enclosure with pins
to retain the defector in a bayonet-type socket at top of panel. The shell
forms one electrical contact, and an insulated button at the bottom end marks
the other contact. A perforated metal guard at top end allows the surround-
ing atmosphere to diffuse in and reach the active part of the cell.
Oxygen detection occurs in an electrochemical cell consisting of a gold and a
lead electrode in a gel-Lype electrolyte, covered by a membrans. Oxygen in
the atmosphere surrounding the detector diffuses Lhrough the membrane at a
rate proportional to the partial pressure of oxygen. This oxygen enters into
ah electrochemical reaction which produces a current directly proportional
to the oxygen concentration and this current in turn develops voltage across
a temperalure-compensating thermistor/resistor network. |
The voltage is applied Lo the detector terminals, and thence to the instru-
ment circuitry where it produces a reading in percenl oxygen, and triggers an
alarm presel point.
. FEATURES
= In trinsically sage design
* Minature size and lightweight (300 g)
+ Percenl oxygen digital readout
* Low bátiery alarm
H
Alarm circuit and metal clip provided
= Automatic self-illumination display in a dark place
1”
Remote alarm capability
+ Remote monitoring capability
3. SPECIFICATIONS
1) Model
2) Detectlon principle
3) Sampling method
4) Range
5) Accuracy
6) Readout
7) Alarm
8) Response time
9) Operating temperature
10) Power supply
11) Battery life
12) Dimensions
13) Weight
14) Life expectancy of
the sensor
15) Warranty
16) Applicable sensor
17) Explosion- proof
OX—82
OX-82
+
Electrochemical
Diffusion sampling
Bullt-in and/or remote sensor type
0 ~ 25% oxygen content
+ 0,3% by volume at constact temp,
Digital display readable to nearest 0,1% oxygen
(3-digit) ,
D Intermittent audible tone and flashing alarm
light, activated when oxygen concent falls
below alarm level (preset at 18%).
@ Continuous audible tone for Tow battery alarm
© External alarm buzzer receptacle
Better than 20 sec, Lo 90% response at 20 ©
5100 — +40€
Dry cells (Standard), 2 pes
100 hrs continuous operation minimum in case of
no alarn/illumination, using dry cells,
78 (4) x 142(H) x 926(D) пп
Approx. 300g (Inc. carrying case)
Above 18 months
| year material & workmanship
Type 0S-B12
Intrinsically safe
OXx-82
4. NAME OF EACH PART
{FTA
e "a e su +. = EE Ки al ue. + y E 5. = 5 IET a A
a Ar A al + TLE : . : E 1 : " de ) Se NL L ь
VP eGR Erie HERS TA DT
ED ET
SRLS
- Pdo ra dir ma
SUR Ee de rf dk nd Rl
" 4
Г Aa A
CERA
Digital Oz display
Oxygen sensor
D
@
opan adjuster
Zero adjuster
Power switch
©
©
©
®
External alarm receptacle
5. OPERATIONAL PROCEDURE
Start
Fa
=
Power switch "ON"
Is
battery voltage
Power switch "OFF"
hed
OX-82
Replacement of battery
* When it is Ni-Cd battery,
above 15 hrs' rechage is
needed,
Oz reading be
above 23% by turning
spen adjuster
When make 0; reading
below 18%, check that
alarm will be triggered,
(Intermittent audible
tone and LED flashing)
E
Adjust reading to
214 in fresh air
ми
This is ready to run
No
Replace sensor with
new one,
1) Operational! procedure
2)
Ox-82
+
The following steps should be followed for normal routine operation.
D While in a location having normal oxygen contenL, turn POWER switch to
©
ON.
If the instrument gives continuous sudible tone even though the reading
is above 18%, battery replacement is required,
(When applying Ni-Cd rechargeable batteries, recharge Lhem Lhrough
battery charger.)
Turn SPAN adjuster clockwise using a fingertip to bring the reading
above 23%, Then turn SPAN adjuster counterclockwise to bring the
reading below 18% and check that the alarm Cintermittent audible tone
and LED flashing) is triggered,
Performances of oxygen sensor and alarm funclLion have been confirmed
with this step.
Set to 21.0 by turning SPAN adjustment using a fingertip, Turn
clockwise (+) to increase reading. |
Note : In a digital in the last place. Dn not be concerned aboul tie
difference between 19.4 and 19.5 or. 20.9 and 21.0,
Allow detector to recover, and note that reading returns Lo 21.
Instrument is now adjusled and ready for a day's use an oxygen
indicator or monitor, The 04-82 can be carried or worn during normal
aclivilies, and will actuate alarm whenever oxygen content drops
below 18.0%.
Function of each part
This instrument is provided with the each funclion in the following;
D
Cancel of audible Lone for oxygen dificiency
The standard instrument gives intermittent audible tone automatically
when oxygen content drops below 18%. If you do nol need this function,
you can cancel it by means of change-over switch (SW2) located inside
instrument. But low battery alarm has nothing to do with the position
of change-over switch,
OX-82
7
© Zero adjustment
This adjustment has been done, by our factory before shipment. It is
recommendable to perform this adjustment with oxygen-free gas if the
Instrument is used to detect oxygen content in inert gas or to detect
low oxygen content.
But it is of no need to perform this adjustment with regard to the
measurement of oxygen difficiency.
To adjust, prepare calibration kit (gas sampling bag and adaptor/cap -
optional accessories). Pack the oxygen-free gas, such as 99,9%
Nitrogen into the gas sampling bag. Cover the sensor of the instrument
with adaptor/cap.
Connect it with the adaptor and let its N; gas inducted into the
instrument, while instrument ls operating.
Watch display and set it to read 0.0 by use of ZERO adjuster @ after
reading gets stable (for about 1 minute).
For adjustment, set it to read once and gradually turn it to
(+) direction until - sign is disappeared.
Now the reading would be and accurate zero adjustment is
completed. Take off the adaptor and leave it in a fresh air.
Note that reading returns to 21.0. If not, adjust to 21.0 by turning
SPAN adjuster using fingertip.
® Self-illumination
The instrument provides the sel f-illuminatlon circuit to read out
oxygen content definitely in a dark place.
The display board is illuminated automatically when It gets dark.
It is put out automatically when it gets light.
@ External alara buzzer
An external buzzer is available as a optional accessory. The buzzer |5
fitted with a lapel clip so it.can be fastened to shirt collar or belt
. where it can be heard easily even in a high-noise eavironment. To use,
simply plug buzzer cable into EXT,ALARH socket ©),
Both the internal and the external buzzers will sound simul taneously,
The capacity of this buzzer is 90db/30ca.
0X-82
6. REMOTE MEASURCMENT BY USE OF EXTENSION CABLE
Fy
[f the extension cable is to be used, first unplug the sensor,
1) It is secured in a bayonet-type
socket : press and turn
counterclockwise Lo release,
2) Insert plug end of cable into
same socket and install sensor
in socket end of cable.
In case Oo
3) Verify operation and adjustment of sensor = O
as before, os
4) Insert the renote sensor into the
place Lo be tesled and read out
oxygen content in the normal way.
7, HOW TO USE THE CAL KIT FOR TIE PRESSURIZED AIR
(Useable under the pressurized environment of below 2.0 kg/cm” )
This KIT is consists of ; a) Calibration adaptor .......... I pce
b) Sampling bag (6 2) ........ .. 1 pee
c) Neoprene hose (S0ca) ......... 1 pce
d) Aspirator bulb ............... | pce
In case of
‘extension
cable
When utilize the instrument under Lhe pressurized environment, prepare the
calibration kit for the pressurized air which ig supplied as optional
accessories.
1) Connect the end of aspirator bulb ta the inlet hose of sampling bag(6 £)
as follows
— >= Y + Sampling bag (6£)
/ E
Aspirator bulb
OX—82
9
2) After above connection, Introduce the ambient pressurized gas into the
sampling bag(62) by squeezing the aspirator bulb,
Air under Ges ln,
pressurized est EE Ц
condition
Squeeze
3) Pack the fresh alr into the gas sanpling bag (optional accdessories) and
close !t with its clip.
4) Carry the adaptor (optional accessories), foresaid gas sampling bag and
the instrument into the pressurized environment.
5) Fix the adaptor to the sensor of instrument. Send air into the adaptor
from the gas sampling bag.
6) Put power switch® to "ON" position and set the reading to 21.0 with SPAN
- adjuster, observing the display board.
7) When the adaptor is taken off swiftly Just after having made the span
adjustment, this Is ready Lo start operation.
8) When the pressure is changed, repeat Lhe above procedures,
, REPLACEMENT OF OXYGEN SENSOR
The oxygen sensor is a plug-in assembly which is easily replaced but is not
field-repalrable. It should be replaced ;
1) When the reading is below 23.0 in normal air even if turning SPAN adjuster
clockwise fully.
2) When the reading becomes eratic, or affected by position or movement of
detector,
When oxygen sensor needs replacement, a new sensor should be installed.
The old one should be sent to RIKEN's authorized dealer for reactivation,
which is done at a flat rate.
Oxygen sensor is guaranteed to operated satisfactorily for a period of
one year from date dated of purchase, If it fails within that time, it
will be reactivated at no charge.
9.
10.
REPLACEMENT OF BATTERTY
#
When the capacity of battery is dropped and the batlery is replaced with new
one, prepare 2 pcs of small size(AA or RB) dry cells,
Note : The replacement of battery should be made surcly al the safely area.
Replacement
of battery
CAUTION IN OPERATION
This instrument is deeply concerned with the life of one's life, operate the
instrument with the following notes taken carefully;
1) Be careful to keep the ;instrument from any water,
2) When operate ib in ship, pul il an Lhe oplional wealher-prool rubber
cover.
3) Do nol drop nor throw it,
4) When not in use for a long Lime, it should be stored after removing
battery (2 pcs of dry cells) from it.
. ACCESSORIES
+ Standard accessoles
1) Dry cells (R6 or AA size) ........e se ea. 2 pcs
2) Instruction manual ........eceecoroeoreóos 1 COPY
3) Carrying case (with hand strap) ......... | pce
A) ес ТРОН ins oh mi ast Rakesh A | sheet
r*Uptional accessories
1) Hi-Cd battery and charger (Please specify voltage)
2) External alarm buzzer (with clip)
3) Extension cable (5m, 10m, 20m or 30m)
4) Calibration kit for pressurized air (Gas sampling bag and adaptor)
5) Carrying bag
6) Weather-proof rubber cover(for marine use)
7) (-) Small screwdriver