Kleinwaechter CPM 374 User Manual
MANUAL
Charge Plate Monitor CPM 374
Incl. Electrostatic Field Meter System Prof. Dr.-Ing. Hans Kleinwächter
2 Manual CPM 374
Inhalt
1. Product Description ................................................................................................................................................ 3
1.1. Specifications .................................................................................................................................................... 3
1.2 Legend ........................................................................................................................................................................ 4
2. Initial Operation ........................................................................................................................................................ 5
3. Mode Selection .......................................................................................................................................................... 5
4. Charge Plate Mode ................................................................................................................................................... 5
4.1. Decay Time and Offset Voltage ................................................................................................................. 5
4.2. Saving Data ........................................................................................................................................................ 7
4.2.1. Choose Storage Space .......................................................................................................................... 8
4.3. Settings ................................................................................................................................................................ 8
4.3.1. Setup ........................................................................................................................................................... 8
4.3.2. Calibration ............................................................................................................................................. 10
5. Voltmeter Mode ..................................................................................................................................................... 11
5.1. Voltage Metering .......................................................................................................................................... 11
5.2. Setting up the Measurement Range ..................................................................................................... 11
5.3. Settings ............................................................................................................................................................. 11
5.3.1. Change distance .................................................................................................................................. 11
5.3.2. Zero Adjust ............................................................................................................................................ 12
6. Electrostatic Field Meter Mode ........................................................................................................................ 13
6.1. Metering an Electrostatic Field .............................................................................................................. 13
6.2. Adjust Range .................................................................................................................................................. 13
6.3. Zero Adjust ..................................................................................................................................................... 13
7. Further Messages .................................................................................................................................................. 13
8. Warranty ................................................................................................................................................................... 14
9. Grounding ................................................................................................................................................................. 14
10. Warning Notices ................................................................................................................................................ 14
11. Maintenance and Calibration ....................................................................................................................... 15
12. Important Information ................................................................................................................................... 15
13. Scope of Delivery .............................................................................................................................................. 15
3 Product Description
1. Product Description
The Charge Plate Monitor CPM 374 with its built-in timer function consists of a high voltage unit
and an electrostatic field meter. Therefore it has an input resistance of 10
16
Ω and is suited for
measuring static potentials and discharging times of air ionizers.
The CPM 374 corresponds to DIN EN 61340-5-1 and EOS/ESD S.3.1.
For measuring vertically the enclosed distance bolts have to be used.
Important: The high voltage unit is protected by high impedance and therefore touch-proof.
By the use of battery power and its compact design the CPM 374 is perfectly suited for mobile
application. Of course it can be operated by using the provided wall power supply. As the CPM
374 is menu-driven and operated by 2 pushbuttons the device is very user-friendly. For a better
orientation the selected parameters are displayed in the double-spaced LCD display.
The device can be operated computer-controlled by use of the provided Excel software.
1.1. Specifications
Dimensions (L x W x H): 152mm x 152mm x 152mm
Weight: Approx. 1,5kg
Display: Alpha-numeric display (100mm x 24mm)
2 lines with 16 digits each
Measurement ranges: Charge Plate: Voltage potentials up to ±1000V
Voltmeter (MK11): Voltages up to ±2000V
Static field meter: El. DC fields up to ±200kV/m
PC-Interface: Serial port, 9-pol. Sub-D connector
Battery: 7,2V / 1300mAh
Time of operation: Approx. 4h on continuous duty with fully charged battery
Charging time: Max. 14h
Wall power supply: Prim. 230V / 50Hz, sec. 12V DC / 750mA
Current consumption: Max. 600mA, battery powered max. 150mA
Temperature range: 0…40°C
Humidity: 10…60% humidity
4 Manual CPM 374
1.2 Legend
C
P
M
3
7
4
V
6
C
H
A
R
G
E
P
L
A
T
E
M
o
n
i
t
o
r
A
B
s
et-
u
p
1
3
2
4
6
5
11
13
128
7
10
9
1 Plate electrode 8 Handhold
2 LCD-Display 9 Mains connection 12V DC
3 Button «A» 10 Serial interface
4 Protective cap 11
±1V analog output with banana jack
5 Modulator system 12 Ground jack
6 Button «B» 13 Ground jack
7 Thread for spacers
5 Initial Operation
2. Initial Operation
With its integrated NiMH storage battery the CPM 374 is plug-and-play. After switching on the
software version is displayed briefly.
Please use only the provided power supply. In battery operation mode the backlight is powered
off to save power. Furthermore the device has automatic power shut-off after 10min of inactivity.
3. Mode Selection
The CPM 374 can be driven as charge plate monitor, voltmeter or electrostatic field meter. By
pressing button «B» the modes can be switched.
4. Charge Plate Mode
4.1. Decay Time and Offset Voltage
The display shows the selected type of measurement and prompts to start, e.g.:
The last mode is stored in the EEPROM and displayed after turning on.
By selecting Decay Time = AUTO the decay time for the positive and the negative voltage is determined automatically . AUTO is recommended because the Start button has to be pressed only
once to perform a measurement, including the determination of the offset voltage.
The offset voltage is the plate’s potential after a certain time that defines the equilibrium of
positive and negative ions. If the offset voltage is positive, the air ionizer has a excess of positive
ions – in case of negative offset voltage the air ionizer excesses negative ions.
Please consider the manufacturer’s instructions for a qualitative analysis.
After pressing the button «A», the plate electrode is charged by the integrated high voltage unit.
The display shows the timer parameters and the applied voltage, e.g.:
TIMER: 1000-100V
U > 1200V
DECAY TIME: AUTO
PRESS START !
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