RKI Instruments Beacon 110 - Manual (Page 39)

Beacon 110 Operator’s Manual 35
Figure 13: 4 - 20 mA Transmitter Detector Head
Entering Calibration Mode
WARNING: The Beacon 110 is not an active gas monitoring device during the calibration
procedure. The 4-20 mA output signal will “freeze” at 3.5 mA (17.4 mA if an
oxygen detector head is installed) and all relays will remain in their non-alarm
state while the Beacon 110 is in Calibration Mode. The 4 - 20 mA output signal
will not indicate current readings and the relays will not resume operating
normally until the Beacon 110 is in normal operation again.
1. While in normal operation, press and hold the UP/YES button for 5 seconds to enter
Calibration Mode. Release the button when the following screen appears.
2. If you want to exit Calibration Mode, press and release the DOWN/NO button. The
Beacon 110 will indicate Leaving CAL Mode and the Beacon 110 will return to normal
operation.
If you want to continue with calibration, press and release the UP/YES button. If a
direct connect detector head is installed, the display will indicate the target gas and
CAL Mode for a few seconds before showing FreshAir Adjust?. If a 4 - 20 mA
transmitter detector head is installed, the display will alternate between CAL AT AMP
and the current gas reading.
NOTE: The Beacon 110 can support one detector head which is either a 4-20 mA
detector head or a direct connect detector head. The following examples
illustrate each type. See the detector head operator’s manual for calibration
information and procedures specific to your detector head.
No
Press ENTER
When Done
Calibrate?
Yes/No
Normal Operation
Press
UP/YES
Calibrate at
Detector Head
Yes
Calib?
YES/NO