Model CMH-RPC Chilled Mirror Dewpoint Hygrometer0 pages

Model CMH-RPC
Chilled Mirror Hygrometer
Chilled Mirror
-90°C to +20°C (-130°F to +68°F)
The Model CMH-RPC instrument is designed to
measure moisture in gas as low as –90°C (-130°F)
dewpoint (Td).
It comprises a three stage peltier cooled mirror
hygrometer that gives a 95°C temperature depression
across the battery at 25°C with a fan cooled refrigerant
condensing unit, together with a temperature controller
and associated electronics.

Accuracy to ± 0.2°C dewpoint - Bench
or Counter Top Standing - Front panel access to all main
components including mirror cleaning - Fast response Stable - Reliable - Easy set up.

Measuring instrument
conforms with
EN 61326

Features and Technical Specication
Sensor Assembly, ow through.
• Three Stage Peltier with Refrigeration
pre-cooler.
Automatic Balance Cycle (ABC).
• Automatically corrects for most mirror
contaminants.
• Automatically re-balances the optics at switch on.
Programmable Automatic Balance Cycle (PABC)
• You choose time and interval of automatic
rebalance for greatest convenience.
• Increases the length of unattended
operation.
Manual Balance Control (MBC).
8 Line LCD Graphic data display with backlight.
Measurements in °C or °F dewpoint.
%RH, AT, ppm(v) and pressure also available.
Scrolling menu via front panel.
Dual alarm capability
• User programmable.
• Can be set for latching or auto-reset
mode.
Serial and analogue outputs
• RS232 communication with terminal,
printer, or computer.
• Remote programming.
• Data output such as dew point and alarm
status - 0-5 VDC, 4-20 mA, 0-10 VDC, or 0-20mA.
• User scalable to drive peripheral devices.

• Available simultaneously, one output
per measurement parameter.
• Scalable throughout the entire operating
range of psychometric variables.
• Programme via front panel.
Pressure transducer input for psychometric
variable (Optional Extra).
Temperature sensor for RH calculation
(Optional Extra).
Control Servo for Mirror temperature overrides
(Heat and Cool).
Power Alternatives:
110-230 VAC, 50/60Hz.
Sample Pressure:
0 to 5 bar (0 to 75 psia).
Sample Flow Rate:
0.25 to 2.4 litres/minute (0.5/5.0 SCFH).
Accuracy: +/-0.2°C dewpoint.
Range:
-90°C dewpoint to +20°C dewpoint.
Certicate of Calibration:
Traceable to National/International Humidity
Standards.
Dimensions: 600 x 520 x 435mm.
Packed Dimensions: 740 x 680 x 590mm.
Weight: 47 Kg.
Packed Weight: 70 Kg.

© Alpha Moisture Systems Ltd.

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