Super Systems H2 Sensor - Manual (Page 3)

Hydrogen (H
2
) Sensor Operations Manual
Super Systems Inc. Page 3 of 17
Introduction
This sensor is designed to accurately measure Hydrogen through thermal conductivity
technology. It is capable of providing additional computations based on the Hydrogen
measurement, and it has multiple methods of digital and analog communications capabilities.
Features
• Measures H
2
from 0 to 100% with 0.01% resolution
• Calculates NH
3
, DA, and K
N
for nitrider applications
• Two isolated analog outputs capable of outputting current (4-20 mA or 0-20 mA) as well as
voltage (2-10 VDC, 0-10 VDC, 1-5 VDC, or 0-5 VDC)
• One RS-232 port with Modbus RTU or a simple ASCII protocol
• One RS-485 port with Modbus RTU protocol
• Wide power supply input range (9 to 30VDC)
• Small physical size
Specifications
Hydrogen measurement
• Range: 0 to 100%
• Accuracy: ±0.01%
• Repeatability: ±0.01%
• Resolution: ±0.01%
Calculated Variables for simple nitrider applications
• %NH
3
0 to 100%
• %DA (dissociated ammonia) 0 to 100%
• K
N
nitriding potential
Analog Outputs
• Two isolated analog outputs with common supply; capable of outputting current (4-20 mA or
0-20 mA) as well as voltage (2-10 VDC, 0-10 VDC, 1-5 VDC, or 0-5 VDC)
• Output variables: %H
2
, %NH
3
, %DA, and K
N
on either output
• Adjustable range of PV: zero and span
• Resolution: 0.005 mA
• Accuracy: ±0.01% of range
• Linearity: ±0.01%
• Minimum load resistance: 0 Ohms
• Maximum load resistance: 500 Ohms
Sample flow rate
• 1.5 to 2 cfh
RS-232 Serial Communications
• Protocols: Modbus RTU or a simple ASCII
• Baud rates: 9600, 19200, or 38400
• Format: 8 bits No parity, 1 stop bit, No handshaking
• Connection: DB-9F