APT3500 Smart Pressure Transmitter
Operation Manual M3500-EO1G
12 DUON System Co., Ltd.
(5) Select a place that transmitter maintenance is very easy.
2.5 Calibration on Spot after Installation
(1)
Sensor Zero Trim should be done after transmitter is installed on spot, because zero point is not
accurate as to mounting status.
(2) For Sensor Zero Trim, make differential pressure of transmitter for zero in advance. Then, make
Sensor Zero Trim after pressure is sufficiently stabilized (after approximately 10 seconds).
(3) There are two ways for making differential pressure for zero. One is to apply zero differential
pressure (making same pressure both high and low side pressure). The other is to close Hign and
Low side of stop valve of 3 valve manifold and to open its equalizing valve.
(4) Sensor Zero Trimming is to use HHT (ACONF312 or 275/375/475 HART Communicator), PC or PDA
configurator, and to use Zero/Span button. Make sure all details on this manual.
(5) Refer to On-line Operation for configuring another parameters except Sensor Zero Trim
2.6 Pressure Connections
The following precautions must be observed in order to safely operate the transmitter under pressure.
(1) Never apply a pressure higher than the specified maximum working pressure.
(2) Confirm the option of pressure connection of transmitter. Necessarily use standardized and quality-
approved parts.
(3) In case of being needed by hard circumstances and regulations, there should be seal equipment
for leakage.
2.7 Waterproofing of Cable Conduit Connections
Apply a non-hardening sealant (silicone or tape, etc.) to the threads to waterproof the transmitter
cable conduit connections.
2.8 Restrictions on Use of Radio Transceivers
▲
Warning
◈
Instrument installed in the process is under presure. Never loosen or tighten the flange bolts as it may
cause dangerous spouting of process fluid.
◈
If the accumulated process fluid may be toxic or otherwise harmful, take approriate care to avoid contack
with the body of inhalation of vapors even after dismounting the instrument from process line for
maintenance.
