sauermann SI-AQ VOC, User Manual

Page: 23 / 42

Page 23 of 42
CHAPTER 9
CALIBRATION
Every instrument must occasionally be tested against some known value or standard in order to make sure that
its accuracy has not deteriorated. If the instrument is reading outside of the stated accuracies in this manual,
the unit should be calibrated.
If the unit is returned to Sauermann for Span Calibration, the unit will be shipped back after Calibration with a
new Calibration Certificate valid for one (1) year. If the unit is Span Calibrated in the field, the original
calibration certificate is no longer valid.
The CALIBRATION MENU lets you set span calibration values for each sensor and performs all sensor
calibrations. The CALIBRATION MENU is shown below.
A brief explanation of the parameters shown follows below:
ZERO GAS SENSORS : This will set the zero point of CO, NO,
NO
2
, SO
2
, H
2
S, CH
2
O, O
2
, VOCs, Pressure & Velocity values.
ZERO CO
2
SENSOR: This will set the zero point of CO
2
.
ZERO THERMOCOUPLE
: This calibrates the external
thermocouple input (T1) to ambient temperature.
ZERO ERRORS
: This will display a list of sensors that were out
of the monitor’s acceptable range during the last zero
countdown.
ZERO TIME : This is the countdown time for the zero Procedure.
The zero cycle time should set at 20-60 seconds.
SPAN TIME : When carrying out a span calibration, you must
introduce the span gas for an appropriate amount of time before
the monitor executes the span calibration. This setting, which is
the same for all sensors, controls this time interval. The span
time is indicated in seconds.
SPAN LOCKOUT
: This controls access to the remaining span
calibration menu options. Span lockout prevents accidental or
mistaken calibrations. Span lockout is enabled and disabled by
entering a 4-digit code. See section D below for the code.
**** CALIBRATION ****
Zero Gas Sensors
Zero CO2 Sensor
Zero Thermocouples
Zero Errors
Zero Time: 60sec
Span Time: 120sec
** Span Lockout **
Sensor History
Span CO: xxxx PPM
Span H2: xxxx PPM
Span CO2: xxxx PPM
Span NO: xxxx PPM
Span NO2: xxxx PPM
Span SO2: xxxx PPM
Span H2S: xxxx PPM
Span FMH: xxxx PPB
Span VOC: xxxx PPB
Span Velocity: xx "
Span ∆ P: xx "
Span AmbT: xx.x C
Span BP: xxxx mbar
Span RH: xx.x %
Cal Thermcple :xxxF
NOTE: Please take special care when performing Calibration of the monitor.
You cannot revert back to the factory setting after any adjustments!
NOTE: CO
2
should ALWAYS be Span Calibrated or Zeroed with a Cylinder of ZERO AIR.
Do Not Use AQ CAL-ZF for CO
2
sensor calibration.