Application Examples:
1. A Model 7254-10 ISOTRON accelerometer has 10.2 mV/g output sensitivity. Gain on the 4416B is set
at X10. System output is now 102 mV/g. If 2.5V pk is recorded on a digital storage scope, the
acceleration level in this measurement is 24.5 g’s pk.
10.2 mV / g
Model 7254-10
Accelerometer
(voltage)
Model 4416B
Signal Conditioner
X 10
GAIN
102 mV / g
Storage Scope
2500 mV pk
102 mV / g
24.5 g pk
2.5V pk
Example with ISOTRON Accelerometer
2. A Model 22 piezoelectric accelerometer (charge output) has 0.40 pC/g output sensitivity and it is used
with a Model 2771A-20 Remote Charge Converter (RCC) that has a fixed gain of 22 mV/pc. Output at
the RCC is 8.8 mV/g. Gain on the 4416B is set at X10, therefore the system output is now 88 mV/pc. If
235 mV pk is recorded, the acceleration level in this measurement is 2.67 g’s pk.
Accelerometer
(charge)
GAIN
Storage Scope
Model 22
X 22 mV /pc
Model 2771A-20
Remote Charge
Converter (RCC)
Modal 4416B
Signal Conditioner
X 10
GAIN
88 mV / g8.8 mV /g
0.40 pC /g
235 m V pk
235 m V pk
88 m V / g
2.67 g pk
Example with Piezoelectric Accelerometer and RCC
Recharging
The 4416B can be operated with or without the charger attached. When the charger is properly connected
and plugged in, the yellow charge LED will turn on. The 4416B will be fully recharged in 2-3 hours. To
achieve the best possible signal to noise ratio, fully charge the 4416B and disconnect the charger for the
lowest noise operation.
A DMM can be used to verify the charge level of the batteries, by connecting a DMM to the input BNC and
measuring the DC voltage. If the voltage is greater than 28V, the 4416B is fully charged. If the voltage is
24V - 28V, the 4416B is ready for operation. If the voltage is less than 24V, recharge the 4416B to >28V for
the longest continuous operation. A fully charged 4416B can operate continuously for about 8 hours.
Repair
The only field serviceable parts are the Ni Cad rechargeable batteries. To replace batteries, remove the four
rubber feet and four screws. Separate the top and bottom covers. Remove and replace the batteries with
new 9V 110mAh Ni Cad batteries and re-assemble. Charge the batteries before use.
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