Yokogawa GD40 Gas Density Detector - Manual (Page 14)

<1. Specifications>
1-5
IM 11T3E1-01E
1.1.2 GD40G, T, V, R Detector
l Material exposed to gas
SUS 316 stainless steel, Acrylonitrile Butadiene Rubber and Fluorine-contained Rubber
(O-ring)
l Ambient conditions
Temperature: -10 to 60 °C (14 to 140 °F)
Humidity: 5 to 95 %RH
Installation: Pipe-mounted or on panel
Construction: Explosion-proof and Intrinsically safe. (See 1.1.1 “System Components”)
Though the detector construction makes it relatively insensitive to sudden changes in
the gas temperature, extra precision can be achieved by keeping ambient tempera-
ture conditions as constant as possible. In measurements where optimum precision is
required it is therefore not recommended to install the detector in an outdoors environ-
ment, especially not if such installation is prone to direct sunlight.
l Finish
Cover: Equivalent to Munsell 0.6GY3.1/2.0
Case: Equivalent to Munsell 2.5Y8.4/1.2
l Weight
Approximately 7 kg (with pipe mounting bracket)
l Detector unit
When the system is ordered to be used as a hydrogen purity meter, an optional pressure
transmitter is required for pressure compensation.
• If /EJAJ1, /EJAF2, /EJAF3 or, /EJAF4 are ordered, the detector unit and the
pressure transmitter and the tubing in between will all be integrated on a single mounting
plate. This allows the space where the pressure transmitter is normally mounted to be used
effectively for other purposes.
1.1.3 GD402G, T, V, R Converter
l Display
Reading: Digital (6 digits maximum; resolution: 0.0001 kg/m 3 )
Data items shown:
Measured value: Always on display.
Alarm indications: Abnormal concentration, abnormal pressure range of input and abnormal
value of calibration.
Parameters for calibration: Time of calibration, settling time, starting time of calibration and
calibration cycle
Self-diagnostic indications: Sensor oscillation shutdown, abnormal oscillation frequency of
sensor, failure in sensor temperature detection, failure in A/D conversion
stage and memory failure.
Alarm settings: The contact state can be set to either “normally open (NO)” or “normally
closed (NC)” depending on the needs of the application.
Temperature: Temperature of gas being measured