Millwatch/Silowatch
Single Stream
User Guide
Page 28
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
3
O
2
sensor*
0 to 5% up to 25%
High CO sensor*
0 to 100000 ppm or
0 to 125000mg/m
3
Composite output*
0 to 100000 ppm or
0 to 125000mg/m
3
Resolution
1 ppm / 1 mg/m
3
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
2
, High CO and Composite CO level
**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
2
sensor high point
**CO level alarms: mid point and high, O
2
high
System OK
Calibration/Maintenance
Isolated change over SP 1 A at 240 V a.c.
*
Millwatch / Silowatch (CO single stream, including High-CO)
**Silowatch (CO + O
2
single stream
