3 Specifications

3.1Mechanical

Dimensions:

140 mm x 173 x 135 (without chamber fitted)

Weight:

2.8 kg (without chamber fitted)

 

Approx. 3.1 kg (with chamber fitted, and filled with water)

3.2

Electrical

 

 

 

 

 

 

 

 

MR850 Model Number

 

Supply Voltage

 

Supply Current

MR850Axx

 

230 V~

 

1.0 A Max

MR850Pxx

 

127 V~

 

1.8 A Max

MR850Jxx

 

115 V~

 

2.0 A Max

MR850Gxx

 

100 V~

 

2.4 A Max

Supply Frequency:

50 or 60 Hz, Sine Wave

 

Heater Plate Capacity

150 W at nominal mains voltage

HP Thermal Cutout:

118 ± 6 °C

 

Heater Wire Supply:

22 ± 5 V~, 2.73 A Max, 50 or 60 Hz

Maximum Heater Wire Load:

8.0 Ω.

 

3.3Temperature Range

3.3.1Heater Wire Mode

Invasive Mode:

Chamber Set Point: 35.5 to 37 °C

 

Chamber Set Point: 35.5 to 40 °C (versions 5.33, 5.34, 5.45, 5.70,

 

6.00, 7.00, 7.21).

 

Chamber Set Point: 35.5 to 42 °C (versions 7.14, 7.17 & 7.22).

 

Airway Set Point: 35 to 40 °C

Non-Invasive Mode:

Chamber Set Point: 31 °C

 

Chamber Set Point: 31 to 34 °C (versions 5.33, 5.34, 5.45, 5.70,

 

6.00).

 

Chamber Set Point: 31 to 36 °C (versions 7.00, 7.14, 7.17, 7.21,

 

7.22).

 

Airway Set Point: 28 to 34 °C

3.3.2Non Heater Wire Mode

Invasive Mode:

Airway Set point: 37

°C (chamber temperature limited to 66 °C)

Non-invasive Mode:

Airway Set point: 31

°C (chamber temperature limited to 66 °C)

Display:

Three digit, 14 mm, 7 segment LED

 

Range: 10 to 70 °C

 

Accuracy:

± 0.3 °C (in 25 to 45

°C temperature range)

3.3.3Alarm Parameters

High Temperature Alarm:

Causes an immediate, audible and visible alarm at a displayed

 

 

temperature of 41 °C or if the airway temperature exceeds 43 °C

 

 

(see section 4.3)

Temperature Alarm:

Invasive Mode:

 

 

After 10 minutes @ 29.5 °C causes an audible and visible alarm.

 

 

After 60 minutes @ 34.5 °C causes an audible and visible alarm

 

 

(see section 4.5)

 

 

NOTE: The temperature indicator lights if the displayed

 

 

temperature drops below 35.4 °C, initially providing a temperature

 

 

warning.

10

MR850 Technical Manual

* Revision J * Issued November 2005 * Ref. 185041340 (185041713 internal)