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
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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

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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
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ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR
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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.

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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

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: 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

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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.

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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.

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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.