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accounts for a factor 200. The combination of these two results in a maximum dividend of 60*200, which
equals 12000.
Method to determine the externally controlled chart speed:
S x F x 0. 0025 = Externally Controlled Chart Speed (mm/s).
S = Chart Speed Setting (must be in mm/s).
F = External Pulse Generator Frequency.
NOTE:
Divide by 60 to convert mm/min. to mm/s.
The maximum frequency at which External Chart Pulses may be sent to the BD 11E/12E recorder is 8
kHz. (Pulse duration at least 1 µs). Since the maximum stepping rate, corresponding to a maximum chart
speed of 20 mm/s and a step size of 0.05 mm, equals 400 Hz, this maximum ECP frequency can only be
handled properly by the recorder, if a dividend value of at least 25 is applicable. The user is responsible
for maintaining this lowest value. If the steppermotor of the chart drive receives stepping pulses at a
frequency greater than 400 Hz, it will stop turning regularly.
This special property of the BD 11E/12E has been built in to meet the requirements needed for unusual
laboratory applications. Under normal circumstances External Chart Pulses do not need to have such a
high frequency.
There is no maximum for the ECP pulse duration, but it is recommended to use pulses of at least 1 µs.
As soon as the positive edge is received, the chart drive will make one step. This is only true when the
dividend equals 1. When the dividend has a value of N, that step will not be made until the Nth positive
edge has appeared.
5.4.2.
Servo marker (BD 11E/12E)
When one of the servo marker functions is activated, the corresponding pen moves 10 mm to the left,
with respect to the position it had. It then continues drawing the applied signal, only the drawn curve is
shifted 10 mm to the left. As soon as the function is deactivated, the pen moves back to the position that
represents the channel input value. This is true if the "zero" position is at the left-hand side of the paper.
If it is at the right-hand side of the paper, then the pen moves to the right, when the servo marker function
is activated.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Instruction manual BD 11/11E / 12/12E
Kipp & Zonen B.V.
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