Model M2 Plus - Specifications
Performance
Accuracy (complete system at 25ºC)  
Dew/Frost Point +/- 0.2ºC (+/- 0.36ºF)
Temperature +/- 0.15ºC (+/- 0.27ºF)
Relative Humidity +/- 1% of reading (nominal from calculation)
Pressure (optional) +/- 0.5% of scale
Sensitivity > 0.05ºC (0.09ºF)
Repeatability +/- 0.05ºC (+/- 0.09ºF)
Hysteresis None

Measurement Ranges

Chilled mirror sensors See table.
Temperature Sensors T-100, 80º to +100ºC (-112º to +212ºF)
Pressure Sensors (PR)

PT-30A, 0 to 30 psia (0 to 2 bar)
PT-300A, 0 to 300 psia (0 to 21 bar) or
User-supplied 4-20mA signal

Required Sample Flow 0.5 to 5.0 scfh (0.25 to 2.5 L/min)
Maximum Cooling Rate, Dew/Frost Point 1.5ºC (2.7ºF)/sec (typical, above 0ºC (32ºF))
Response Time
Temperature < 7 sec. (+25º to +70ºC (+77º to +158ºF) step change)
Pressure 1 sec to 90% of steady state (10% to 90% change)
Display Resolution 0.1º (dew/frost point, temperature), 0.1% RH
Update Time 3 seconds
 
Functional
Outputs
Analog Two: 4-20 mADC, 500 ohm max., 0-5 VDC, 5mA max.
Analog Scaling (standard)
Dew/Frost Point Sensors 1111H, D-2: -40 to +60ºC (-40 to +140ºF)
SIM-12H: -25 to +100ºC (-13 to +212ºF)
1311DR, 1311XR: -80 to +20ºC (-112 to +68ºF)
RH (optional) 0% to 100% RH
Temperature (optional) -40Cº to +60Cº (-40º to +140Fº)
Pressure (optional)

PT-30A, 0 to 30 psia (0 to 2 bar)
PT-300A, 0 to 300 psia (0 to 21 bar)

Digital RS-232C
Alarm
Relay Form V, SPDT, 5A, 250 VAC
Service Alarm TTL compatible. Service bit also available on RS-232C output.
PACER™ status TTL compatible. Status bit also available on RS-232C output.
Displays
Display 2 displays, 3 1/2 digit LED
Power 100, 115, 230 VAC (+15%, -20%) switch selectable, 50-60HZ, 50 watts max. (specify)
 
Operating Ranges
Sensor
Ambient Temperature -15º to +95ºC (+5º to +203ºF) depending on sensor
Pressure -14.7 to 300 psig (0 to 22 bar) depending on sensor
Electronics
Ambient Temperature 0º to +50ºC (+32º to +122ºF)
Relative Humidity 85% max
 
Physical
Weight 4.3 kg (9.5 lb.)
Shipping Weight 6.6 kg (14.5lb.)
Environmental General purpose bench or rack mount.
 
Accessories
PM-M2 19" rack mount adapter with dust cover
T-100 Temperature sensor
PT-30A Pressure sensor
PT-300A Pressure sensor