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Millwatch / Silowatch
19 Technical Specification
Coal Mill Probe
Probe material
Hardened mild steel
Probe filter
Stainless steel
Weight
3.5 kg (7.7 lb)
Flue gas temperature
200 ºC maximum
Analyser
Ambient Temperature
0 ºC to 45 ºC (32 ºC to 113 ºF),
-20 ºC to 45 ºC (-4 ºF to 113 ºF) with optional case heater
0 ºC to 50 ºC (32 ºF to 122 ºF) with optional cooler
Weight
53 kg (117 lb)
Power consumption
300 W
800 W with case heater
225 W with antifreeze line
Voltage
83 to 132 V ac or
165 to 264 V ac
50 to 60 Hz
Calibration
Automatic, 2-point calibration span and zero,
microprocessor controlled.
Indicators
2 LEDS on door panel; power on and system OK
Environmental
System enclosure:
Painted steel, sealed to IP65/NEMA 4
Compliance
EMC:
Conforms to EN-50 081 and EN-50 082
Electrical Safety:
Conforms to EN-61010-1
Measurement Ranges
Low CO sensor*
0 to 100 up to 4000 ppm in 50 ppm steps or
0 to 100 up to 5000 mg/m3 in steps of 50 mg/m
O
sensor*
0 to 5% up to 25%
2
High CO sensor*
0 to 100000 ppm or
0 to 125000 mg/m
Composite output*
0 to 100000 ppm or
0 to 125000 mg/m
Resolution
1 ppm / 1 mg/m
Linearity
< 2 % of range
Zero drift
< 2 % of range per month
Span drift
< 2 % of range per month
Input and Output Connections
Analogue Outputs
*4 x isolated current loops: Low CO, O
**One isolated current loops for CO level
0, 2 or 4 mA to 10 to 20 mA
Relay outputs
CO level alarms:
*Low CO Sensor mid point and high
*High CO sensor mid point and high
*O
**CO level alarms: mid point and high, O
System OK
Calibration/Maintenance
Isolated change over SP 1 A at 240 V a.c.
28
*
Millwatch / Silowatch (CO single stream, including High-CO)
**Silowatch (CO + O
single stream
2
3
3
3
sensor high point
2
3
, High CO and Composite CO level
2
high
2
Single Stream
User Guide
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