Tde Instruments DPM961-NTR User Manual
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.
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
• 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.
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.
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!
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 M
± 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 M
Ω
4. PCB
DPM961
DPM962
04
VR1
LK4
LK5
CN1
1
2
13
14
LK6
LKT
LK7
1
2
CN1
13
14
VR1
LKT
CN2
LK7
LK4
LK6
LK5
LK1
LK2
RB
RA
!