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Sound and Vibration Instrument Hire and Calibration

Norsonic 1251 and 1252 Specifications


 
Norsonic Acoustic Calibrators
 
Nor 1251 : Sound Level Calibrators - class 1 precision £ 3 a day *
 
Nor 1252 : Sound Level Calibrators - class 2 £ 2 a day *
 

The Nor 1252 has been withdrawn as most customers prefer the Nor 1251 class 1 calibrators. The following 1252 details are retained for information only

 
Specifications 1251 1252
IEC 60942 Class Class 1 Class 2
Complies with ANSI S140 Yes Yes
SPL re 20 µPa 114.0 ± 0.2 dB 114.0 ± 0.4 dB
Frequency 1000 Hz ± 0.2 % 1000 Hz ± 0.2 %
Distortion < 1% < 1%
Sensitivity to load volume +0.0003 dB/mm3 +0.0003 dB/mm3
Typical change in SPL per year < 0.02 dB < 0.02 dB
Time for level to stabilize < 2 sec. < 2 sec.
Microphone size * 1"   1/2"   1/4" 1/2"   1/4"
Temperature range -10 °C to +50 °C -10 °C to +50 °C
Ambient pressure range 65 to 108 kPa 65 to 108 kPa
Humidity range 10 to 90 %RH 10 to 90 %RH
Battery type 9V - 6LR61 9V - 6LR61
Battery life > 30 hours > 30 hours
Adaptor - 1/4" * Nor 1444 Nor 1445
External supply voltage 7.5 to 15 V DC. Automatic shut-off when V < 7.5 V DC
CE classification, EMC EN 50081-1, EN 50082-1
Safety EN 61010-1, 1993 portable equipment pollution category 2
Size Length: 109.5mm, Ø: 40 mm
Weight 185 g with battery
Controls Power-on push button with green LED indication
 
E&OE - specifications subject to change without notice.