Safety Instructions - TDE Instruments DPM961 Instructions D'utilisation

1. Introduction
In 5V mode each module generates its own -5V supply
which enables it to measure signals with the same
common zero as the supply. Connections are brought
out to enable the module to operate in various modes
including single ended, ratio measurement and
differential. Different modes are selected by linking PCB
solder pads which are provided for the purpose.
• Auto-polarity
• 200mV full scale reading
• Low power consumption
• 5 or 9 volt dc operation (customer selectable)
• Low battery warning (9 volt operation only)
• Annunciators for common engineering units and decimal
point
• Hold function with annunciator

2. Safety instructions

No input may be taken outside the range VDD minus
0.5V and VSS plus 1.0v. If there is a danger that any
input may be taken outside these limits, it is necessary
to fit a resistor of suitable value to limit the current to
100µA in series with the input or damage to the unit
may occur.
The voltage on IN HI or IN LO must not exceed ±4.5V
for 5V supply or ±3.5V for 9V supply.
!
The maximum voltage allowed for any connection
to the PCB is 48V. When measuring voltages
greater than 48V, the scaling resistors must be fitted
externally!
3. Specification
Genauigkeit
± 0.5 %
Linearity
±1 LSD
Sample Rate
3 pro sec
Temperature Stability
30 ppm/°C
Operating temperature
0 - 50 °C
Storage temperature
-20 - 70 °C
Supply voltage (5V mode)
3 - 7 V DC
Supply voltage (9V mode)
7 - 12 V DC
Supply current
2 mA
Backlight voltage
4.5 bis 5.5 V DC
Backlight current DPM961
40 mA
Backlight current DPM962
80 mA
Input impedance
100 MΩ
4. PCB
DPM961
VR1
LK6
DPM962
CN2 LK7 LK6
LKT
04
1
LK4 LK5 CN1
LKT LK7 13
LK5 LK2 1
LK1
RB
LK4 VR1 RA
2
14
2
CN1
13
14