38 en | Installing the Pendant Arm Wall, Corner, and Mast (Pole) Mounts VG4 Modular Camera Series
F.01U.162.025 | 6.0 | 2010.03 Installation Manual Bosch Security Systems, Inc.
Figure 2.21 Tighten Pendant Connection
2.11.5 Calibrating the Pressure Sensor
The VG4 Pressurized Environmental Housing features an internal low-pressure sensor alarm
which must be calibrated to the local atmospheric pressure. The heater/blower/pressure
sensor power must be connected to do calibration.
You must perform the calibration procedure within four (4) minutes of powering up the VG4
unit or the sensor will not store the calibration data. If you should miss this calibration period,
power off the unit and restart the procedure.
Once the sensor is calibrated no further adjustment is necessary. You may recalibrate the
unit, however, anytime that power is shut off to the VG4 unit.
The procedure is as follows:
1. Apply power to the VG4 unit. The green LED, located at the left side of the camera
module, illuminates and remains constant.
2. After approximately 30 seconds the LED begins to blink, indicating that the VG4 unit is
ready for calibration.
1 Rotate down to engage dome connector.
2 Tighten the two (2) mounting screws to a minimum torque of 10-12 N-m
(90-105 in.-lbs).
CAUTION!
You must tighten the two mounting screws to a minimum torque of 10-12 N-m (90-105 in.-lbs)
to ensure a proper seal between the arm and the housing.
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