Instruction manual

2.0 SPECIFICATIONS SM425 INSTRUCTION MANUAL
2.5 ZA8F Flow Setting Unit and SM425CAL Automatic
Calibration Unit
2.5.1 ZA8F Flow Setting Unit
This flow setting unit is applied to the reference gas and the calibration gas in a system configuration
(System 2).
This unit consists of a flowmeter and flow control valves to control the flow of calibration gas and
reference air.
Standard Specifications
Flowmeter:
Calibration gas; 0.1 to 1.0 l/min. Reference air; 0.1 to 1.0 l/min.
Construction:
Dust-proof and rainproof construction
Case Material:
SPCC (Cold rolled steel sheet)
Painting:
Baked epoxy resin, Dark-green (Munsell 2.0 GY 3.1/0.5 or equivalent)
Pipe Connections:
Rc1/4 or 1/4FNPT
Reference Air pressure:
Clean air supply of measured gas pressure approx. 50 kPa G (or measured gas pressure plus
approx. 150 kPa G when a check valve is used)
Pressure at inlet of the autocalibration unit. (Maximum 300 kPaG)
Air Consumption:
Approx. 1.5 l/min
Weight:
Approx. 2.3kg
Calibration gas (zero gas, span gas) flow 0.7 l/m (at calibration time only)
Use instrument air for span calibration gas, if no instrument air is available, contact Teledyne Monitor
Labs.
Table 2-5 Flow setting unit codes
42500001 REV A 21