Electrical measuring instruments >> analog panel meters >> recorders

N338 (H338)

available:
1 piece
For order is possible effectively delivery of any quantity.

Fast recording device N338

Also this device may be referred to: N-338, N 338, N3-38, H338, H-338, H 338.

 

N338 fast recording device is designed to record in analog form of fast processes that are converted to the corresponding value of the electric voltage.

 

Modifications N338-1, N338-2, N338-4, N338-6, N338-8, N338-1B, N338-2B, N338-4B, N338-6B, N338-8B are medical devices, and modifications N338-1P, N338-2P, N338-4P, N338-6P, N338-8P- for general industrial use.

 

Devices N338 can be used as an individual device, and by inserting it into the electrocardiographs and other medical and measuring systems.

 

Specifications N338:

 

Operating frequency range - from 0 to 150 Hz.

The linear part of the frequency range - from 0 to 60 Hz.

Permanent registration of each measuring channel - 0,02 V/cm; 0,04 V/cm; 0,08 V/cm; 0,2 V/cm; 0,4 V/cm; 0,8 V/cm; 2/cm; 4 V/cm.

 

Modifications Number of channels The width of the chart tape
N338-1, N338-1B, N338-1P 1 50 mm
N338-2, N338-2B, N338-2P 2 100 mm
N338-4, N338-4B, N338-4P 4 200 mm
N338-6, N338-6B, N338-6P 6 290 mm
N338-8, N338-8B, N338-8P 8 380 mm

 

Record readings:

- modifications N338-1B, N338-2B, N338-4B, N338-6B, N338-8B - on heat-sensitive paper in a rectangular coordinate system;

- modifications N338-1, N338-1P, N338-2, N338-2P, N338-4, N338-4P, N338-6, N338-6P, N338-8, N338-8P - ink in the curvilinear coordinate system.

The width of each measuring channel recording - 40 mm.

 

Chart speed tape:

- devices for recording with the ink - 1 mm/s; 2,5 mm/s; 5 mm/s; 10 mm/s; 25 mm/s; 50 mm/s; 100 mm/s;

- devices for recording on heat-sensitive paper - 0,2 mm/s; 1 mm/s; 2,5 mm/s; 5 mm/s; 10 mm/s; 25 mm/s; 50 mm/s; 100 mm/s.

The voltage from the internal calibration source - 40±1,2 mV.

 

Reduced static nonlinearity error of the amplitude characteristic, expressed as a percentage of the width of the measuring channel recording:

- medical devices - not more than ±3%;

- general purpose device - not more than ±4%.

 

Variation readings, expressed as a percentage of the width of the measuring channel recording - not more than 4,5%.

Total failure to return the end of the writing device and the zero line chart tape - not more than 1 mm.

Ratio of the first release on the transient response to steady deviation writing device - not more than 1,1.

 

Admission to the uneven frequency response:

- in the range from 0 to 60 Hz (when a double recording amplitude 20 mm) - not more than ±0,5 dB;

- in the range from 0 to 100 Hz (when a double recording amplitude 20 mm) - not more than +0,5 dB, -1,5 dB;

- at a frequency of 150 Hz (at double amplitude records 10 mm) - -3 dB.

 

Zero offset line records for 8 hours of operation, expressed as a percentage of the width of the measuring channel recording - not more than 1%.

Line shift recording in any measuring channel multichannel device, due to the influence of rectangular pulses applied to the input of the measuring channel located near, expressed as a percentage of the width of the measuring channel recording - not more than 1,5%.

Scour recording line from the internal noise, interference and noise, expressed in percentage of the width of the recording of the measuring channel - not more than 0,5%.

Accuracy of temperature change for every 10° C, expressed as a percentage of the width of the measuring channel recording - not more than ±2,25%.

Deviation from the influence of an external magnetic field of 400 A/m, expressed as a percentage of the width of the measuring channel recording - not more than ±1%.

Error on the inclination of the device at 5°, expressed as a percentage of the width of the measuring channel recording - not more than ±1%.

Error caused by the change in the power supply voltage of ±10% of nominal value, expressed as a percentage of the width of the measuring channel recording - not more than ±1%.

 

Power consumption:

- modifications N338-1, N338-1B, N338-1P - not more than 60 V·A;

- modifications N338-2, N338-2B, N338-2P - not more than 75 V·A;

- modifications N338-4, N338-4B, N338-4P - not more than 100 V·A;

- modifications N338-6, N338-6B, N338-6P - not more than 150 V·A;

- modifications N338-8, N338-8B, N338-8P - not more than 185 V·A.

 

Test voltage supply circuit device relative to the body:

- medical devices - 4 kV;

- general purpose instrument - 2 kV.

 

Permissible values of current and voltage contacts for remote button medical devices intended to enable the external circuit:

- DC - 250 V and 0,1 A; 127 V and 0,4 A; 12 V and 1,0 A;

- AC - 250 V and 0,2 A; 127 V and 0.6 A; 12 V and 1,5 A.

 

MTBF - not less than 8000 hours on the same channel.

Average life - 8 years.

Dimensions and weight instruments are presented in the table:

 

Modifications Overall dimensions Weight
N338-1, N338-1B, N338-1P 225×440×170 mm 15 kg
N338-2, N338-2B, N338-2P 270×440×170 mm 18 kg
N338-4, N338-4B, N338-4P 360×440×170 mm 22 kg
N338-6, N338-6B, N338-6P 450×440×170 mm 32 kg
N338-8, N338-8B, N338-8P 540×440×170 mm 35 kg

 

N338 recording device consists of measuring units, power stabilizers, structurally combined with timers in a multichannel device, tape drive and power supply.

 

Operating conditions N338:

 

Normal ambient temperature - (+20±5)° C.

Ambient temperature - from +10° C to +35° C.

Relative humidity at +30° C - 80%.

Rated voltage - 220 V.

Supply frequency - 50 Hz.

Photos: N338 (H338)

N338 (H338) device image.
N338 (H338) device image.
N338 (H338) front view.
N338 (H338) front view.
N338 (H338) side view.
N338 (H338) side view.
N338 (H338) side view.
N338 (H338) side view.
N338 (H338) rear view.
N338 (H338) rear view.
N338 (H338) bottom view.
N338 (H338) bottom view.


Яндекс цитирования