QRD1112B Ammonia Decomposition Rate Analyzer User Manual introduces the product's use conditions, main technical data, working principle, set, electrical system, installation, start-up and indication calibration, manufacturing unit guarantee and other information.
The QRD1112B ammonia decomposition rate analyzer measures the decomposition rate by detecting the change in oxygen concentration after ammonia is decomposed, suitable for nitrogen furnace atmospheres and gas generation devices. It operates by heating a platinum‑wire sensor whose resistance changes with gas thermal conductivity, producing a voltage output proportional to H₂ concentration.
The manual provides technical data, installation instructions, electrical system diagrams, startup procedure, zero and full‑scale calibration steps, and warranty information. It specifies required gas conditions, environmental limits (ambient temperature 5–40 °C, relative humidity up to 80 %, no corrosive gases), and power requirements (220 V ±10 %, 50–60 Hz). This manual is written in Chinese.
| Measurement range | 0–100 % H2 |
|---|---|
| Output signal | 0–100 mV (DC) |
| Basic error | ±2.5 % |
| Time constant | <20 s |
| Thermal equilibrium time | <30 min |
| Supply voltage | 220 V ±10 % |
| Supply frequency | 50–60 Hz |
It measures from 0 to 100 % H₂.
After 30 minutes of thermal equilibrium, introduce a 0.5 L/min zero‑standard gas (air) and adjust the zero‑adjustment potentiometer until the output reads 0 mV.
Ambient temperature 5–40 °C, relative humidity up to 80 %, and no corrosive gases in the atmosphere.
Less than 30 minutes after power‑on.