Calibration; Readout Check - ANALOX SA1 W75 SR 60 N 564 User Manual

6

Calibration

Factory Calibration is required at least once every 12 months to replace the electrochemical
oxygen sensor.
6.1

Readout check

It is recommended that a readout check is performed on a routine basis as part of emergency
equipment checks and drills.
The readout check can either be performed using certified test gases or in a verified
atmosphere. The SUB MkIIP should be turned on and allowed to warm up (at least 40
seconds) before readings are taken. Test gases should be piped as described in Section 6.2.
Atmospheric measurements should be made in an atmosphere whose constituents have
been measured by verified O
Once the readings on the SUB MkIIP have settled, take readings for O
using certified test gases, the readings should be within the tolerances in the center column of
the table below. When the SUB MkIIP is being verified against a CAMS verified atmosphere,
use the right hand column as a guideline to the acceptable tolerance. Also ensure that the
SUB MkIIP is sampling the atmosphere from the same compartment as the CAMS.
To convert the CAMS Gas reading from units of Torr to %SEV, use the following formula:
CAMS Gas Reading
To convert the CAMS Pressure reading from units of Torr to FSW, use the following formula:

CAMS Pressure Reading


750
Parameter
(to be used with certified test gas)
Oxygen (O ) An accuracy of ±1% for SUB MkIIP reading
2
over a 0 to 200%SEV range and ±2 display
counts;
(SUB MkIIP Reading)(0.01)+0.2 = (± _%SEV*)
Carbon An accuracy of ±5% of a 10%SEV CO2 range
Dioxide (CO ) for readings 0 to 4.99%SEV and ±2 display
2
counts; (±0.52%SEV*).
An accuracy of ±10% of a 10%SEV CO2 range
for readings 5 to 10%SEV and ±2 display
counts; (±1.02%SEV*).
Pressure ±0.15% of 300FSW range and ±2 display
counts; (±0.7 FSW*) at STP.
±0.5% of 300FSW range and ±2 display
counts; (±1.7 FSW*) otherwise.
If the readings are outside these tolerances the SUB MkIIP requires calibration.
Sub MkIIP Oxygen & Carbon Dioxide Monitor
, CO and pressure sensors (e.g. CAMS).
2 2

in Torr 100

CAMS
750


in Torr 32.8

-

SUB MkIIP specification
*
Applicable Readout Tolerance
User Manual - US Navy Version
2
Equivalent Reading

32.8 CAMS Equivalent
SUB MkIIP vs. CAMS Allowable
(to be used at 700 to 900Torr
compartment pressure and 50 to 90°F)
± 0.74%SEV*
± 0.52%SEV*
Document Ref: AS2-802-14 - January 2016
, CO and pressure. If
2
in %SEV
Reading in FSW
Tolerance
±1.75 FSW*
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