Non-Incendive Field Wiring 4-20 Ma, Gcs404 Series; Calibrating The Cylinder Scale Amplifier - Brooks Instrument GCS404 Serie Manual De Instalación Y Funcionamiento

Installation and Operation Manual
X-PR-GCS400-eng
Part Number: 541B175AAG
February, 2012

2-7-2 Non-Incendive Field Wiring 4-20 mA, GCS404 Series

Figure 2-1 Non-Incendive Field Wiring 4-20 mA, GCS404 Series

2-7-3 Calibrating the Cylinder Scale Amplifier

The non-incendive field wiring for the GCS404 series is shown in Figure 2-1.
The GCS404 cylinder scale is factory calibrated. However, if field adjustment
is needed, follow the steps below.
Exceeding the scale's capacity changes its calibration and may cause
permanent damage.
NOTE The GCS404 Cylinder Scale is NOT field serviceable. Should the scale
require repair, it must be returned to the factory for service.
1. Connect the power source and allow a few minutes for the amplifier to
stabilize.
2. With no load on the scale's platform, adjust the zero potentiometer to
obtain 4.0 mA dc on either lead.
3. Place a load on the scale that weighs ± 0.1% of the scale's full capacity,
and adjust the span potentiometer to obtain 20.0 mA dc.
4. Repeat steps 3 and 4 as necessary to achieve a stable output at both
ends of the cylinder scale (zero and full scale).
Section 2 Installation
®
Brooks GCS404/GCS405 Series
2-3