Detcon FP-524D-HRT - Manual (Page 37)

Model FP-524D-HRT
FP-524D-HRT Instruction Manual Rev. 0.1 Page 33 of 48
Figure 19 FP Calibration Screen
4.4.3.3 Sensor Calibration using the HRT Bridge
Calibration of a sensor using the HRT Bridge follows the same principle as calibrating the sensor via the
magnetic interface. Since most of the calibration information can be found in Section 3.4 Calibration Mode, it
is important to have the sensor manual on hand when performing sensor calibration.
Auto Zero
Auto Zero function is used to zero the sensor. Local ambient air can be used to zero most sensors as long as
there are no traces of target or interference gases. If this cannot be confirmed, then a zero air or N
2
should be
used. N
2
must be used for zero calibration of O
2
deficiency sensors.
Material Requirements:
 Handheld Communicator or PC and interface for HRT Bridge.
 Detcon PN 613-120000-000 Splash Guard with integral Cal Port. -OR-
-Detcon PN 943-000006-132 Threaded Calibration Adapter
 Detcon PN 942-001123-000 Zero Air cal gas or use ambient air if no combustible gas is present.
NOTE: The zero gas source should have a normal background concentration of 20.9% O2.
Pure Nitrogen gas standards should not be used or errors may result.
NOTE: Refer to Section 3.4.1 AutoZero. For FP sensors, zero air should be used. Zero Air
should have a normal background of 20.89% O
2
. Pure Nitrogen (N
2
) should not be used or
errors may result.
Auto Zero consists of entering “Autozero Cal” and following the menu-displayed instructions.
1. If applicable install the Calibration Adapter or Splash Guard Adapter with integral Cal Port.
2. If applicable connect zero gas to the cal port.
3. Select “Autozero Cal” from the Sensor Calibration section of the screen.