ZRN-RY-A industrial dissolved oxygen meter

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ZRN-RY-A industrial dissolved oxygen meter Notable features:
A, can be a key recovery (return to factory settings )
B, a plurality of parameters simultaneously display
C, a plurality of different display modes
D, button audio feedback
Technical Parameters:
1. Measuring range : 0.00 ~ 19.99mg / L
2. Resolution : 0.01mg / L
3. Control range : 0.00 ~ 19.99mg / L
4. Temperature compensation : 0.0 ~ 45.0 ℃ ( automatic or manual)
5. Output signal : 4 ~ 20mA output isolation protection
6. Control output : ON / OFF relay output contacts
7. relay under load : Maximum AC 220V 5A
8. Current output load : maximum allowable load of 500Ω
9. Operating voltage : 220V ± 10% AC, 50 / 60Hz
10. Dimensions : 96 * 96 * 115mm
11. Hole Size : 91 * 91mm
12. The working conditions of the instrument :
① ambient temperature : -5 ~ 55 ℃
② air relative humidity : ≤80%
③ outside the Earth's magnetic field around strong magnetic field interference except