Manual

Publication GMSI10-UM031C-EN-E - January 2009
22 Installing the Enwatch
Sampling rate 64 to 51200 Hz by 1
Number of synchronous time averages 1, 2, 4, 8, 32 ... 32768
Sample length Multiple of 256 bytes, maximum sample 32768 bytes if no trigger, 16384 bytes with
pre-trigger (not used in first version of Enwatch)
Filter settling time HP 0.36 Hz 18 seconds
HP 2.67 Hz 3 seconds
HP 5.3 Hz 1.2 seconds
HP 23.8 Hz 0.3 seconds
Integrator HP 0.36 Hz 25 seconds
Integrator HP 2.67 Hz 8 seconds
Integrator HP 5.3 Hz 1.5 seconds
Integrator HP 23.8 Hz 0.8 seconds
gSE 200 Hz 88 milliseconds
gSE 5 kHz 2 milliseconds
Core 0.7 seconds
Time constant of 0.03 seconds 300 milliseconds
Time constant of 0.006 seconds 60 milliseconds
Time constant of 0.0012 seconds 12 milliseconds
Time constant of 0.00024 seconds 3 milliseconds
Trigger delay 0-32768 samples. Emonitor always uses 0.
Trigger channel 1-4 channels, TTL input 5-20 V
Maximum combined trigger current (channels 1-4), not to exceed 100mA.
Gain control X1, X10, X100, X1000, X5, X50, X500, X5000
Download X1 always. The Enwatch unit autoranges and returns back the current gain for
rescaling.
Anti-Alias filter 20 kHz, 2 kHz, 500 Hz, 100 Hz. This is read only. The Enwatch unit selects the proper filter.
Table 1.16 Enwatch measurement capabilities
Product Feature Capability
FMAX Sampling Rate FMAX Sampling Rate
25 64 2000 5120
50 128 3200 8192
100 256 4000 10240
200 512 5000 12800
400 1024 6400 16384
500 1280 8000 20480
800 2048 10000 25600
1000 2560 16000 40960
1600 4096 20000 51200