ANALOX 1371 MK2 User manual

ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR
1371-810-03 User Man al, A g st 2007 117
ANALOX 1371 MK2 SURVEYOR
CARBON DIOXIDE MONITOR
INSTRUCTION MANUAL
Analox Sensor Techn
15 Ellerbeck Co rt
Stokesley B siness Park
STOKESLEY.
Cleveland
TS9 5PT
Telephone : [phone]
Fax : [phone]

ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR
1371-810-03 User Man al, A g st 2007 217
LIST OF CONTENTS
Section Page N mber
1 INTRODUCTION ........................................................................................................................ 5
2 SPECIFICATIONS....................................................................................................................... 6
2.1 GENERAL........................................................................................................................ 6
2.2 OPERATIONAL............................................................................................................... 6
2.3 OUTPUTS ........................................................................................................................ 7
2.4 MECHANICAL................................................................................................................ 7
3 INSTALLATION AND COMMISSIONING............................................................................... 8
3.1 INSTALLATION.............................................................................................................. 8
3.2 CONNECTIONS ............................................................................................................. 9
3.3 COMMISSIONING.......................................................................................................... 9
4 OPERATION.............................................................................................................................. 10
4.1 ALARM SETPOINTS.................................................................................................... 10
5 CALIBRATION.......................................................................................................................... 11
5.1 GENERAL COMMENTS .............................................................................................. 11
5.2 CALIBRATION PROCEDURE..................................................................................... 11
6 MAINTENANCE ....................................................................................................................... 14
6.1 GENERAL ..................................................................................................................... 14
6.2 CHANGING THE FILTER............................................................................................ 14
7 PRINCIPLE OF OPERATION................................................................................................... 14
8 WARRANTY & REPAIR.......................................................................................................... 15
8.1 WARRANTY ................................................................................................................. 15
8.2 REPAIR .......................................................................................................................... 16
8.3 TRANSDUCER REPLACEMENT................................................................................ 17
9 FAULT FINDING ...................................................................................................................... 18
10 SPARES...................................................................................................................................... 19
10.1 CALIBRATION KITS.................................................................................................... 19
10.2 CALIBRATION SPARES.............................................................................................. 19
10.3 OPERATIONAL SPARES............................................................................................. 19

ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR
1371-810-03 User Man al, A g st 2007 317
IMPORTANT NOTES
Any adj stments or repairs to the ANALOX 1300 range of instr ments sho ld only be carried
o t by a competent electronic engineer, familiar with Instr ment technology.
S.A.E.P. Ltd. WILL NOT ACCEPT RESPONSIBILITY FOR ANY EVENTS OCCURRING
AS A RESULT OF UNAUTHORISED ADJUSTMENTS OR REPAIRS TO THE INSTRUMENTS.
S.A.E.P. Ltd. operate a policy of contin o s improvement to their prod cts and reserve the right to change
the design, components and specification of their eq ipment, witho t prior notice.
However, the company will endeavo r to keep their c stomers informed of any changes, which they
consider to be relevant to the contin ed satisfactory performance of their prod cts.
The information in this doc ment is given in good faith and believed to be correct, at the time of
p blication.
The p rchasers attention is drawn to o r terms and conditions of sale, a copy of which is available, on
req est.
F rther technical assistance may be obtained by contacting S.A.E.P.
IMPORTANT SAFETY WARNINGS
THESE WARNINGS MUST BE READ AND UNDERSTOOD BY ALL PERSONNEL
CONCERNED WITH THE INSTALLATION, OPERATION AND MAINTENANCE OF
THIS INSTRUMENT.
The Instr ments in the 1300 Range are NOT s itable for operation in a Hazardo s Area, as
defined by the British Standard BS 5345 Part 4.
ELECTRICAL SHOCK HAZARD WARNING.
The electrical power sed in the 1300 Range of Instr ments, may be at a voltage s fficient
to endanger life. Before carrying o t any maintenance or repair, persons concerned m st
ens re that the eq ipment is disconnected from any Mains s pply and tests made to ens re
that isolation is complete.
When the s pply cannot be disconnected, f nctional testing, maintenance or repair sho ld
only be ndertaken by q alified persons, who are aware of the preca tions necessary when
carrying o t s ch operation.

ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR
1371-810-03 User Man al, A g st 2007 417

ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR
1371-810-03 User Man al, A g st 2007 517
1 INTRODUCTION
The ANALOX 1371 SURVEYOR provides a clear Digital Display of Carbon Dioxide
concentration in a gas sample. It can be employed either as an ambient monitor, sing its
internal p mp to draw the sample, or as an 'On-Line' monitor if the gas to be checked is
flowing thro gh a pipe.
The Instr ment ses a 'State-of-the-Art' Infra-Red Analyser, with no electro-mechanical moving
parts, designed to meet the demand for acc rate meas rements of Carbon Dioxide, where
performance and q ality are essential.
Ranges of meas rement available are as follows :
Range Part N mber
0-100% SA1 D03 BG88 N002
0-20% SA1 D03 BE87 N002
0 - 10% SA1 D03 BD86 N002
0 - 5% SA1 D03 BC89 N002
0 - 2% SA1 D03 BB90 N002
0 - 1% SA1 D03 BA91 N002
0-0.5% SA1 D03 SA92 N541
Two completely independent, ser adj stable alarm circ its are incorporated, the setpoints of
which are accessible on the front panel, and adj stable over the f ll range of the Instr ment.
Both a dible and vis al indication is provided at the onset of an alarm condition and volt-free
relay contacts are available for connection of external warning devices.
The Instr ment is ho sed in a high impact, glass reinforced polycarbonate wall mo nting
case and is sealed to IP65, when the hinged transparent front cover is closed. This front cover
also incorporates a simple locking device to disco rage na thorised adj stments of the front
panel controls. The Instr ment case has been coated with a do ble layer of cond ctive
material to provide EMC Compliance - ie Imm nity from external Radio Freq ency Emissions
and containment of any internally generated RF. Mains inp t filters are also fitted to avoid
cond cted interference.
Installation is straightforward only req iring three fixing points and all external electrical
connections are made to screw terminals.

ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR
1371-810-03 User Man al, A g st 2007 617
2 SPECIFICATIONS
2.1 GENERAL
Ranges Available : 0 to 0.5%,1%, 2%, 5%, 10%, 20%, 100% CO
2
Linearity : 1% FS
Repeatability : 1% FS
Resol tion : ± 1 Digit on Display
Zero Drift : 2% FSD / week max
Response time : Less than 30 secs to T90
Display : 3 1/2 Digit LCD (1999 max reading)
Alarm Ranges : Adj stable over f ll range of Meas rement
2.2 OPERATIONAL
Ambient Temperat re : 5 to 50°C (Wider operating Temperat re Units are
available on req est)
Storage Temperat re : -20 to 70°C
Analyser Temp. : Ambient
Warm- p Time : 2 mins at 25°C (Typical)
Temp. Co-efficient : Zero : 0.1% FS /°C (Typical)
: Span : 0.2% FS /°C (Typical)
H midity : 0 -90% Non-condensing
P mp Flow Rate : 75 ml/min (4.5 l/hr)
Press re Effect : 0.15% of Reading per millibar
Operating Press re : 0.9 to 1.1 Bar ABS.
Power S pplies : a) 230v AC 50/60Hz
(specified at time of order) : b) 110v AC 50/60 Hz

ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR
1371-810-03 User Man al, A g st 2007 717
: c) 12V DC
Power Cons mption : 18 VA Maxim m
2.3 OUTPUTS
Relays : Low Flow Alarm
: SPCO Contacts NO NC COM (HI Alarm)
: SPCO Contacts NO NC COM (LO Alarm)
Contacts rated 7 Amp 250v AC (Resistive)
7 Amp 30v DC
Analog e O tp t : 4-20mA Maxim m Load 300 Ohms
: Optional 0 to 1 Volt (Minim m Load 5K Ohms)
2.4 MECHANICAL
Tilt Effect : Independent
Dimensions : 296mm (W) 256mm (H) 118mm (D)
Weight : 3.2 kg
Gas Connections : S itable for 6mmOD / 4mmID plastic Pipe
NOTE : DISPLAY RESOLUTION & ACCURACY.
The Digital displays used in this series of instruments are of the 3 1/2 digit type. The indicating
accuracy of such a Display is limited to the resolution ie Plus or Minus the reading on the Least
Significant Digit (the right most Digit . If the Quoted indicating range is 0.00 to 100.00 then
when the display reads 0.00 the actual input signal could be between -0.004 and +0.004.
The Least Significant Digit will change from 0 to 1 when the absolute value changes from 0.004
to 0.005

ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR
1371-810-03 User Man al, A g st 2007 817
3 INSTALLATION AND COMMISSIONING
3.1 INSTALLATION
3.1.1 The 1371 S rveyor sho ld be mo nted on a vertical s rface sing 3 off M4 machine screws or No.
8 woodscrews. Make s re that the chosen mo nting position allows s fficient room on the Left
of the Instr ment, to permit the hinged front cover to be f lly opened, and below the nit to
allow cables and pipework to be correctly fitted. The Hinged front cover may be reversed if
req ired.
3.1.2 Remove the two screws from the Terminal compartment cover, sit ated along the lower edge
of the Instr ment. Remove the cover taking care not to strain the connecting wires to the a dible
warning b zzer. These wires are connected to the Motherboard sing a small 2 way pl g. This
may be removed by caref lly releasing the locking latch on the Left of the pl g.
3.1.3 Referring to the Fig re 1 below, drill three holes in the mo nting s rface or fit 3 woodscrews at
the hole centres.
3.1.4 Fix the Top screw in place b t not f lly screwed down - this is req ired to hang the Instr ment
from the Keyhole position on the back of the case. Hang the Instr ment on the central screw and
then sec re it with two screws in the slotted positions in the lower corners.

ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR
1371-810-03 User Man al, A g st 2007 917
Fig re 1. Fixing Centres.
3.2 CONNECTIONS
3.2.1 Connections to remote eq ipment, eg Flashing beacons or High powered So nders and data
recording devices are made thro gh two cable glands, to the screw terminals in the middle area of
the terminal compartment. The pper row of terminals provide connections to the alarm relay
contacts and the lower row are signal inp t and o tp t connections. On the 1371 Instr ment,
only the extreme right hand two terminals are sed on the Signal terminals - these provide a 4-
20mA DC o tp t signal, representing 0 to 100% of Instr ment meas ring range. Optionally, a 0 -
1volt o tp t can be provided instead of the 4-20mA, if this is req ested when ordering.
3.2.2 On AC S pply versions, an AC mains s pply of correct val e as stated on the Internal label
covering the terminals, sho ld be connected thro gh the left most cable gland, to the terminals
marked 'L' and 'N'. The Earth lead sho ld be fixed to the Ring connector provided on the Earthing
st d, on the Left inside wall of the Terminal compartment.
3.2.3 On DC S pply versions, a 12V DC s pply sho ld be connected to the terminals marked '12V', '+'
and '-'.
3.2.4 Remote gas sampling may be carried o t by connecting p to abo t 30 metres of 4mm I.D. 6mm
OD plastic t bing between the 'GAS IN' b lkhead connector and the area to be monitored.
3.2.5 A P mp fail re or gas flow fail re Alarm circ it is incorporated and this operates a relay, whose
contacts are connected to a 3way screw terminal block, j st to the left of the terminals described in
Section 3.2.1 Under normal flow conditions, the NC and CM contacts are closed and the NO and
CM contacts open. Under flow fail or power fail conditions, these contacts will change over.
3.3 COMMISSIONING
3.3.1 When the 1371 S rveyor is first switched on, it req ires a period of abo t 40 Seconds, for the IR
Transd cer to settle. D ring this period, the Reading on the Display will be clamped to read the
F ll Scale Val e of the partic lar Instr ment.
3.3.2 When the settling time has expired, the Instr ment will display the CO
2
concentration in the gas
being drawn thro gh the Transd cer, by the sample p mp.
3.3.4 The Alarm setpoints sho ld be checked and adj sted if necessary, following the proced re
o tlined in Section 4 and a f ll Calibration carried o t as detailed in Section 5.

ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR
1371-810-03 User Man al, A g st 2007 1017
4 OPERATION
4.1 ALARM SETPOINTS
4.1.1 The Instr ment incorporates two completely independent alarm circ its, which may be adj sted
by the ser, to any point within the f ll range of the instr ment. Both alarm circ its are
config red to operate when the meas red gas concentration Exceeds the setpoint - ie they are High
going alarms.
4.1.2 When an alarm condition occ rs, the appropriate Red LED (HI or LO) will start to flash, the
internal A dible device will so nd and the associated relay will change state. The A dible alarm
may be silenced by pressing the 'MUTE' b tton, located j st nder the lower edge of the main
panel. This action also changes the LED from flashing to a steady ill minated state. The relay and
LED will remain in this condition, ntil the meas red concentration falls below the alarm
setpoint, at which time, the relay will revert to its normal state and the LED will be t rned off.
4.1.3 Adj stment of the setpoints is a simple proced re. Locate the switch marked 'HI - LO' in the
'ALARM ADJUST' section of the front panel. This device is normally spring biassed to its central
position. To read the present setpoint for the LO alarm, press the switch to the right - the setpoint is
then shown on the display. To read the present setpoint for the HI alarm, press the switch to the left
- the setpoint is then shown on the display. To adj st the setpoint, hold the switch in the appropriate
position and sing the trimming tool provided, or a small terminal screwdriver, rotate the
appropriate trimmer , 'HI' or 'LO' ntil the desired setpoint is indicated on the Display.
Clockwise rotation increases the setpoint val e. Release the switch and repeat for the other alarm
if req ired.

ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR
1371-810-03 User Man al, A g st 2007 1117
5 CALIBRATION
5.1 GENERAL COMMENTS
Calibration req ires gases to be fed from cylinders of certified concentration. These gases
MUST NOT be delivered directly at cylinder press re to the Instr ment, otherwise the internal
p mp will be damaged. Scottish Anglo E.P. Ltd. s pply calibration kits for the 1371 Instr ment,
comprising two cylinders of gas, a cylinder mo nted flowmeter with control valve and s itable
t bing. It is strongly recommended that this kit is sed for Calibration.
If a ternative ca ibration equipment is used, precautions must be taken to imit the gas
pressure and f owrate to a va ue not exceeding 1.0 Litres per Minute.
Under no circumstances must excessive gas pressure or f ow be app ied to the instrument
otherwise damage to the pump and/or Transducer wi be inevitab e.
5.2 CALIBRATION PROCEDURE
5.2.1 Zero calibration
Using a Calibration Kit cylinder of 'Zero Gas' ie Nitrogen, fit the Flowmeter/control valve
assembly on to the Cylinder screw connector. There may be a small escape of gas j st before the
assembly is f lly tightened - this is q ite normal. Connect the delivery t be to the small Barbed
connector on the flowmeter and then to the 'GAS IN' port on the Instr ment. Adj st the rotary
valve on the flowmeter ntil the indicator ball is level with the middle grad ation on the flowmeter.
This prod ces a flow of approximately 1 Litre per min te. Allow the displayed reading to stabilise
and if necessary, adj st the 'ZERO' trimmer, to the left of the display, ntil the Display shows
'000'.
5.2.2 Span Calibration
Using a Calibration Kit cylinder of 'Span Gas' having a concentration of CO
2
between 75% and
100% of Instr ment meas ring range, fit the Flowmeter/control valve as described in Section
5.2.1. Adj st the rotary valve on the flowmeter ntil the indicator ball is level with the middle
grad ation on the flowmeter. This prod ces a flow of approximately 1 Litre per min te. Allow the
displayed reading to stabilise and if necessary, adj st the 'SPAN' trimmer, ntil the reading on
the display is the same as the concentration of the Certified gas mixt re.
5.2.3 Close the control valve, remove the plastic t bing from the instr ment and the flowmeter and
remove the flowmeter/control valve assembly from the gas cylinder. The control valve is not
designed to provide a total gas sh t-off when closed so to conserve gas s pplies, it sho ld only be
fitted immediately before se.

ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR
1371-810-03 User Man al, A g st 2007 1217
5.2.4 It is important to realise that the Analyser in this Instr ment responds to the partial press re of
Carbon Dioxide in the gas sample and that the calibration is strictly valid only at the temperat re
and press re at which the calibration was done. Small changes in readings will occ r as ambient
press re changes from day to day. However, these changes are limited to abo t 0.15% of reading
per millibar press re change and for most applications, wo ld be insignificant.
For example, ass me an Instr ment is monitoring a 1% gas mixt re at 1000mB press re and is
s bjected to a 30 mB press re increase over a period. This wo ld res lt in a change in reading of
4.5% of the 1% reading and the Instr ment indicating 1.045% .
5.2.5 If d ring the Calibration process, the desired readings cannot be achieved, then it is possible that
the Infra-Red Transd cer mod le req ires service. To check that the Transd cer mod le is
operating correctly, proceed as follows.
5.2.6 THIS OPERATION SHOULD ONLY BE CARRIED OUT BY A COMPETENT TECHNICIAN,
SINCE THERE ARE LETHAL VOLTAGES PRESENT INSIDE THE UNIT.
Open the front clear plastic cover of the Instr ment. Remove the Fo r Corner screws in the front
panel and caref lly ease the front panel o t of the Instr ment case. The Infra-Red Transd cer
mod le is located in the lower right corner of the Instr ment ho sing. On the top cover of the
Transd cer mod le, there is a stat s indicator light.
Under normal operating conditions, this light sho ld be flashing On and Off at abo t a 1 second
period. If the Transd cer mod le req ires service, then this light will either be Permanently ON or
OFF. If this is the case, then contact either yo r distrib tor or Scottish Anglo E.P Ltd. for f rther
Advice.

ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR
1371-810-03 User Man al, A g st 2007 1317
6 MAINTENANCE
6.1 GENERAL
Ro tine maintenance sho ld be carried o t at six monthly intervals to ens re contin ed reliable
operation. The proced re detailed below sho ld be followed and sho ld not take more than abo t
20 min tes. It is strongly recommended that the proced res be carried o t by a technician or
engineer, familiar with Electronic Instr mentation.
Scottish Anglo E.P. Ltd offer both a f ll calibration service, and training service for c stomers'
maintenance personnel. F ll details are available from Scottish Anglo E.P. Ltd. C stomer services
Department, who may be contacted at the Address / Telephone / Fax shown on the front page of
this man al.
6.2 CHANGING THE FILTER
Disable the power s pply to the Instr ment and open the front cover. Remove the fo r corner
screws from the front panel and caref lly ease the front panel away from the Instr ment case.
The panel is attached to the main circ it board by some wires b t it can be temporarily 'parked' in
the ppermost slots on the left and right sides of the case. Locate the plastic filter nit fitted in
the Gas Inlet Pipe. Caref lly remove the plastic t bing from the ends of the and insert the new
filter in the piping. Replace the front panel, ens ring that the wires to the front panel are not
trapped between the panel and the case. The Instr ment may now have its power s pply restored
and after initial warm- p will be ready for operation.
Replacement Filters are available from Scottish Anglo E.P. Ltd. and sho ld be ordered as Part
N mber 1000-1401
A f ll Calibration proced re, as detailed in Section 5 sho ld now be carried o t.
NOTE : If the Instrument is being used in a particularly dusty atmosphere, the filter may
require changing more frequently.

ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR
1371-810-03 User Man al, A g st 2007 1417
7 PRINCIPLE OF OPERATION
Most gases, when exposed to the Infra Red region of the electromagnetic spectr m, will
absorb energy and prod ce very specific resonant molec lar vibrations. These characteristic
absorptions (vibrations) can then generally be sed to identify individ al gases.
The degree of absorption depends on the n mber of absorbing molec les (concentration) in an
Infra Red path length between an Infra Red so rce and Infra Red detector. (Beer-Lambert Law)
In practical terms, the path length is chosen for the degree of absorption necessary to determine
a partic lar band of concentration (range of meas rement) and the gases can be identified by
se of narrow band interference filters, t ned to an appropriate characteristic absorption
wavelength.
The family of Transd cers sed in the ANALOX 1371 MK 2 range of Instr ments are based
on a meas rement and reference sensor principle, tilising sample path lengths of between 1mm
and 100mm in length, depending on the concentration to be meas red, and wavelength selection
by a caref lly specified narrow band interference filter. The so rce is p lsed at a reg lar freq ency
to prod ce an Infra Red carrier signal which is atten ated by Carbon Dioxide absorption and a
detection system which converts this atten ation into an electrical o tp t.
The electrical o tp t from the transd cer is then processed by additional electronic circ its to
provide indication of concentration on an LCD Display and monitoring for Alarm conditions.

ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR
1371-810-03 User Man al, A g st 2007 1517
8 WARRANTY & REPAIR
8.1 WARRANTY
We provide the following Warranties for the Analox 1371:
A 1 year sensor warranty.
A 1 year electronics warranty.
In both cases the Warranty period runs from the date of our Invoice.
We warrant that the e uipment will be free from defects in
workmanship and materials.
The Warranty does not extend to and we will not be liable for defects
caused by the effects of normal wear and tear, erosion, corrosion, fire,
explosion, misuse, use in any context or application for which the
e uipment is not designed or recommended, or unauthorised
modification.
Following a valid Warranty claim in accordance with the above, the
e uipment, upon return to us, would be repaired or replaced without
cost or charge but in our discretion we may elect instead to provide to
you which ever is the lesser of the cost of replacement or a refund of
net purchase price paid as per our Invoice on initial purchase from us.
We shall have no liability for losses, damages, costs or delays
whatsoever. We shall have no liability for any incidental or
conse uential losses or damages. All express or implied warranties
as to satisfactory or merchantable uality, fitness for a particular or
general purpose or otherwise are excluded and no such Warranties
are made or provided, save as set out in this Clause 7.
In order to effectively notify a Warranty claim, the claim with all
relevant information and documentation should be sent in writing to:
Analox Sensor Technology Limited
15 Ellerbeck Court
Stokesley Business Park
Stokesley
North Yorkshire
TS9 5PT
Or by e-mail to : [e-mail]
Or by Fax to : [phone]

ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR
1371-810-03 User Man al, A g st 2007 1617
We reserve the right to re uire from you proof of dispatch to us of the
notification of Warranty claim by any of the above alternative means.
The e uipment should not be sent to us without our prior written
authority. All shipping and Insurance costs of returned e uipment are
to be born by you and at your risk. All returned items must be properly
and sufficiently packed.
8.2 REPAIR
Apart from ro tine Calibration and filter changes, there are no ser serviceable parts inside the
Instr ment. In the event of any s spected malf nction, the ser sho ld check that all controls
are in their correct position and if still experiencing problems, contact Scottish Anglo E.P. or
their Agent.
SAEP offer service and training co rses for c stomers' maintenance personnel and we strongly
recommend that this instr ment be serviced by an SAEP trained engineer, on a 6 monthly basis.
F rther details may be obtained by contacting o r C stomer Service Department.

ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR
1371-810-03 User Man al, A g st 2007 1717
8.3 TRANSDUCER REPLACEMENT
The Infra-Red Transd cer (CO
2
Sensor) is constr cted as a complete Mod le which permits rapid,
relatively straightforward, field replacement, in the nlikely event of the Transd cer req iring
service.
It is strong y recommended that this operation is on y carried out by personne who have
attended a re evant training course at Scottish Ang o, or Qua ified E ectronics Engineer, with
guidance from Scottish Ang o E.P. Service Department.
The proced re is as follows:
1 Remove power from the Instr ment and open the clear plastic door cover. Remove the 4
corner screws in the instr ment front panel and caref lly ease the front panel away from the
ho sing. The panel may be temporarily 'parked' in the pper pair of g ide slots, located on
the side members of the ho sing.
2 The Transd cer is located in the lower right corner of the ho sing. It is a metal box
meas ring approximately 115mm x 65mm x 30mm.
3 Remove the 6mm OD plastic t bes from the gas flow adaptor, mo nted on the top of the
Transd cer. This operation is best carried o t by inserting the jaw tips of a pair of thin
nosed pliers, between the end of the plastic t be and the hexagonal white part of the flow
adaptor and gently levering the t be off the barbed connector.
4 Separate the two halves of the 'In-Line' connector located on the right of the Transd cer.
5 The Transd cer is sec red to the baseplate by 4 x No 8 Self tapping screws. Remove these
screws and the Transd cer may then be withdrawn from the Instr ment ho sing.
6 Fit the replacement Transd cer and re-assemble the Instr ment.
7 Switch on the power s pply to the Instr ment and allow it to operate for abo t 30 min tes.
Carry o t a f ll Calibration ro tine as detailed in Section 5 of this man al.
8 The original Transd cer sho ld be ret rned to Scottish Anglo E.P. Ltd. for f rther
investigation.

ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR
1371-810-03 User Man al, A g st 2007 1817
9 FAULT FINDING
The list below is intended to assist in tracing elementary fa lts, which can probably be corrected by
the ser or a Technician. It is not an exha stive list of all possible conditions. If any diffic lty is
experienced, contact either the agent who s pplied the Instr ment or Scottish Anglo E.P. Ltd.
Service Department, at the address shown on the front page of this man al.
SYMPTOM CORRECTIVE ACTION
No Display or Green Light Check Mains S pply is connected / Switched On
Check Instr ment F se & Replace if necessary
No Display Response to Gas
whilst in normal operating
mode.
Check that P mp is operating (Listen close to Instr ment for B zzing
so nd / feel slight vibration on Instr ment Ho sing) If obvio sly not
operating contact Agent or SAEP. Ltd.
Check any external t bing to the Instr ment for blockage / kinks
No Display response to
Calibration Gas
Check Calibration Gas Cylinder is not empty and that the gas in the
cylinder is Carbon Dioxide (CO
2
).
Check the flow on the flowmeter is approximately 1 Ltr/Min. If still no
response, carry o t proced re detailed in Section 5.2.6 of this man al &
contact Agent / SAEP. Ltd
Alarms not F nctioning
Check that the ALARM INHIBIT switch on the front panel is in the Right
Hand position, and the 'INHIBIT' LED is not lit. Note that the Inhibit LED
will operate for abo t 30 Seconds after switch-on.
Check the Alarm Set points as detailed in Section 4 of this man al.
'FAULT' LED Ill minated 'ZERO' adj stment control incorrectly set (Too far Anti-clockwise)
Carry o t Calibration proced re as detailed in Section 5 of this man al
If this does not correct the fa lt, contact Agent or SAEP. Ltd.
'O.RNG' LED Ill minated
(Overrange)
Contact Agent / SAEP. Ltd.

ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR
1371-810-03 User Man al, A g st 2007 1917
10 SPARES
10.1 CALIBRATION KITS
Instr ment Range Kit Part N mber
0.5% FS - SA7 D03 0P5
1.0% FS - SA7 D03 1P0
2.0% FS - SA7 D03 2P0
5.0% FS - SA7 D03 5P0
10% FS - SA7 D03 10P
20% FS - SA7 D03 20P
100% FS - SA7 D03 100P
10.2 CALIBRATION SPARES
Gases 20 Litre Cylinder (Disposable) Test Gas
P re Nitrogen - SA7 L20 01
0.5% CO
2
in Air - SA7 L20 130
1.5% CO
2
in Air - SA7 L20 131
4.0% CO
2
in Air - SA7 L20 132
10% CO
2
in Air - SA7 L20 57
50% CO
2
in Air - SA7 L20 133
100% CO
2
- SA7 L20 134
Reg lator to s it 20 Ltr Cylinder SA7 FLOWIN
10.3 OPERATIONAL SPARES
Pack of 5 Gas Filters 1000-1401
Comment:
LAST
Comment:
PAGE