Operating manual
E3907
4
BE 984 i
www.tecsis.de
3. Introduction
This manual describes the features and installation procedures for the E3907 with firmware version 3.
3.1 Brief description
The E3907 is a DC measuring amplifier for passive or active sensors. A flexible data logger can store up to 3000
measured values with time and date. Mobile operation is possible by battery or accu operation, however, it can also
be operated with a power unit. Measuring or logging values are transmitted via an RS-232 interface to a pc or
printer. 10 parameter sets for sensors are available. There, in each case, the calibration data , the sensor
designation and the physical unit are being stored. Functions such as tare, min./max.-recall and min./max.-delete
are available during the measurement procedure. Via a trigger input the data logger or the interface can be
controlled externally.
If the E3907is being delivered with one or more sensors, these sensors will be in-calibrated to the E3907 and are
immediately ready for operation. An assignment of sensors to the corresponding parameter set is documented on
the rear of the device
3.2 Power supply
Mains operation:
Power supply:
6V DC, min. 1,8A
Fuse:
Self-reset-able fuse 1,5A
Under-Overcut:
Can cause measurement errors or defects.
Stress peaks:
Be derived using protection components.
Voltage dropouts:
Voltage dropouts up to 10ms are without consequences.
Warning:
Remove batteries when using external power supply!
The E3907 must only be used with ground reference voltage supplies, switching power supplies without earth
reference can cause measurement errors.
Battery Operation:
Battery operation:
4 x Typ: Mignon AA 1,5V
Accu operation:
4 x Typ: NiMH Mignon AA mit min. 1500mAh und 1,2V
The battery charging time for a battery capacity of 2.7 Ah approximately 9-10 hours. The constant charging current
for charging the battery is approximately 290mA. The end of charging process will be recognized with a minus delta
peak method (overcharge protection). For rapid charging of the batteries is an external battery charger (eg
Ansmann 4 - 6) recommended. The batteries can be charged at off, and while the E3907 is running.
Power supply:
If the permissible battery voltage falls below the indicator starts blinking
