Kleinwaechter CPM 374 User manual

MANUAL
Charge Plate Monitor CPM 374
Incl. Electrostatic Field Meter System Prof. Dr.-Ing. Hans Kleinwächter

2 Man al CPM 374
Inhalt
1. Prod ct 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. Set p ........................................................................................................................................................... 8
4.3.2. Calibration ............................................................................................................................................. 10
5. Voltmeter Mode ..................................................................................................................................................... 11
5.1. Voltage Metering .......................................................................................................................................... 11
5.2. Setting p the Meas rement Range ..................................................................................................... 11
5.3. Settings ............................................................................................................................................................. 11
5.3.1. Change distance .................................................................................................................................. 11
5.3.2. Zero Adj st ............................................................................................................................................ 12
6. Electrostatic Field Meter Mode ........................................................................................................................ 13
6.1. Metering an Electrostatic Field .............................................................................................................. 13
6.2. Adj st Range .................................................................................................................................................. 13
6.3. Zero Adj st ..................................................................................................................................................... 13
7. F rther Messages .................................................................................................................................................. 13
8. Warranty ................................................................................................................................................................... 14
9. Gro nding ................................................................................................................................................................. 14
10. Warning Notices ................................................................................................................................................ 14
11. Maintenance and Calibration ....................................................................................................................... 15
12. Important Information ................................................................................................................................... 15
13. Scope of Delivery .............................................................................................................................................. 15

3 Prod ct Description
1. Product Description
The Charge Plate Monitor CPM 374 with its b ilt-in timer f nction consists of a high voltage nit
and an electrostatic field meter. Therefore it has an inp t resistance of 10
16
Ω and is s ited for
meas ring 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 meas ring vertically the enclosed distance bolts have to be sed.
Important: The high voltage nit is protected by high impedance and therefore to ch-proof.
By the se of battery power and its compact design the CPM 374 is perfectly s ited for mobile
application. Of co rse it can be operated by sing the provided wall power s pply. As the CPM
374 is men -driven and operated by 2 p shb ttons the device is very ser-friendly. For a better
orientation the selected parameters are displayed in the do ble-spaced LCD display.
The device can be operated comp ter-controlled by se 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-n meric display (100mm x 24mm)
2 lines with 16 digits each
Measurement ranges: Charge Plate: Voltage potentials p to ±1000V
Voltmeter (MK11): Voltages p to ±2000V
Static field meter: El. DC fields p to ±200kV/m
PC-Interface: Serial port, 9-pol. S b-D connector
attery: 7,2V / 1300mAh
Time of operation: Approx. 4h on contin o s d ty with f lly 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% h midity

4 Man al CPM 374
1.2 Legend
CPM374V6
CHARGEPLATEMonitor
AB
set-up
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 B tton «A» 10
Serial interface
4 Protective cap 11
±1V analog o tp t with banana jack
5 Mod lator system 12
Gro nd jack
6 B tton «B» 13
Gro nd jack
7 Thread for spacers

5 Initial Operation
2. Initial Operation
With its integrated NiMH storage battery the CPM 374 is pl g-and-play. After switching on the
software version is displayed briefly.
Please se only the provided power s pply. In battery operation mode the backlight is powered
off to save power. F rthermore the device has a tomatic power sh t-off after 10min of inactivi-
ty.
3. Mode Selection
The CPM 374 can be driven as charge plate monitor, voltmeter or electrostatic field meter. By
pressing b tton « » the modes can be switched.
4. Charge Plate Mode
4.1. Decay ime and Offset Voltage
The display shows the selected type of meas rement and prompts to start, e.g.:
The last mode is stored in the EEPROM and displayed after t rning on.
By selecting Decay Time = AUTO the decay time for the positive and the negative voltage is de-
termined a tomatically . AUTO is recommended beca se the Start b tton has to be pressed only
once to perform a meas rement, incl ding the determination of the offset voltage.
The offset voltage is the plate’s potential after a certain time that defines the eq ilibri m 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 man fact rer’s instr ctions for a q alitative analysis.
After pressing the b tton «A», the plate electrode is charged by the integrated high voltage nit.
The display shows the timer parameters and the applied voltage, e.g.:
TIMER: 1000-100V
U > 1200V
DECAY TIME: AUTO
PRESS START !

6 Man al CPM 374
The timer starts by passing the pper threshold (1000V in the example)
and determines the decay time by reaching the lower threshold (100V in the example). The pa-
rameters for the timer can be selected in the Setup.
Important: Decay times ≤
≤≤
≤ 0,1s are displayed as <0,1s
After the determination of the decay time (s), the offset voltage is meas red after a defined time
period.
The meas rement is finished after determining the offset voltage. All data req ired, e.g. to q ali-
fy an air ionizer, can be read off the display. The offset voltage UOFF and the associated time slice
are displayed in the pper line, the decay time is displayed in the bottom line as POS.DECAY or
NEG.DECAY or ii AUTO - Mode alternating every second:
The display remains ntil b tton «A» Continue is pressed.
OFF = XXXV T = XXXs
POS.DECAY = XX.Xs
OFFSET = XXXs
U = XXXXV
TIMER = XX.Xs
U = XXXXV

7 Charge Plate Mode
4.2. Saving Data
It is possible to save the meas red data in the internal memory. After every meas rement the
device prompts :
By pressing b tton « » the c rrent data are discarded and the next meas rement can be per-
formed.
By pressing b tton «A» the saving is initiated. In event of free space section 4.2.1 is displayed. In
the case of f ll memory (99 entries) the device anno nces for 2s:
To save the data nevertheless the memory has to be erased. Therefore the following prompt is
displayed:
Skip the deleting process by pressing b tton « » and contin e to the next meas rement. The
last res lt disappears from the display and cannot be saved.
Important: It is strongly recommended to copy all data with the provided software to a pc. In
this case the memory can be erased witho t losing precio s data.
After erasing the whole memory by pressing b tton «A», the device proposes the storage space
FILE NO 01 for saving the last meas rement.
DELETE FILES?
A<YES
NO>
MEMORY FULL!
SAVE VALUES?
A<YES
NO>

8 Man al CPM 374
4.2.1. Choose Storage Space
In case of eno gh free space the device prompts:
Confirm the selection by pressing «A». The data is stored:
The selection can be modified by pressing b tton « ». The device displays:
Decrease the tens col mn by pressing «A» and/or decrease the ones col mn by pressing « ».
Important: Only existing file n mbers can be overwritten.
If no b tton is pressed for abo t 3s the display ret rns and yo can select the new val e by
pressing b tton «A».
4.3. Settings
By pressing «A» and « » sim ltaneo sly the device prompts after 1s:
Press «A» to enter SETUP or « » followed by «A» to enter the ZERO ADJUST men .
4.3.1. Setup
In the SETUP the last selected settings for mode are displayed:
By pressing « » the following options can be selected:
In the modes POS or NEG only positive resp. negative decay time is meas red and after the time
period the offset voltage is displayed.
MODE = AUTO
A<OK
CHANGE>
SET-UP ?
A<YES
NO>
FILE NO: XX
A<
-
10
-
1>
PLEASE WAIT !
SAVING !
FILE NO: XX
A<YES
CHANGE>

9 Charge Plate Mode
Afterwards the starting voltage can be set
Confirm the displayed val e by pressing «A» or press « » to select a new one. Val es are
switched in the following order:
Next the stop voltage is set:
Confirm the displayed val e by pressing «A» or press « » to select a new one. Val es are
switched in the following order:
Afterwards the time period for the offset voltage meas rement is inq ired:
Confirm the displayed val e by pressing «A» or press « » to select a new one. Val es are
switched in the following order:
The selected parameters for START, STOP and OFFSET are displayed for 3 seconds:
The device inq ires whether the parameters are right:
Confirm the displayed val e by pressing «A» or press « » to change the val es again.
TIMER + OFFSET OK?
A<YES
NO>
TIMER: 1000-100V
OFFSET: 1 min
OFFSET: 10s
A<OK
CHANGE>
STOP: U = 100V
A<OK
CHANGE>
START: U = 1000V
A<OK
CHANGE>

10 Man al CPM 374
After pressing b tton «A» the device inq ires if the memory sho ld be cleared:
Important: If yo have changed the parameters, the memory must be cleared to apply the
changes, beca se stored data always incl de the stored parameters.
Delete all files and apply the new parameters by pressing b tton «A» Set p will q it afterwards.
Press b tton « » to discard the changes:
The old parameters are set again and the changes that have been made are discarded.
4.3.2. Calibration
By pressing « » followed by «A» after the SETUP q estion, the calibration men appears:
Choose «A» YES to perform an a to offset calibration. The device ret rns:
Pressing « » skips the calibration.
Caution: D ring the calibration external voltage m st not be connected to the plate electrode!
PLEASE WAIT!
CALI RATION!
ZERO ADJUST?
A<YES
NO>
PARAMETER
NOT CHANGED !
PARAMETER
CHANGED
CLEAR MEMORY?
A<YES
NO>

11 Voltmeter Mode
5. Voltmeter Mode
5.1. Volt Meter
For metering voltages with the CPM 374 the plate electrode has to be removed. Afterwards the
voltage meas ring head MK11 has to be mo nted on the mod lator system of the integrated
electrostatic field meter.
5.2. Setting up the Measurement Range
Information on changing the mode is available in section 3. In the voltmeter mode the display
shows:
By pressing «A» the following ranges can be set:
The display shows the c rrent range, in the example above R=2kV.
5.3. Settings
After pressing «A» and « » sim ltaneo sly the device prompts after 1s:
Enter the SETUP by pressing «A» or ZERO ADJUST by pressing « » followed by «A».
5.3.1. Change Mode
In the SETUP the following message appears:
After pressing «A» to change the mode the device prompts:
By pressing b tton « » the following options can be set:
V-Mode: MK11!
A<
OK
CHANGE
>
SELECT Mode?
A<
YES
NO
>
SET-UP?
A<YES
NO>
V-METER R=2kV
MK11!
U = 0,00kV

12 Man al CPM 374
Confirm the selection and exit SETUP by pressing «A». Mo nt the selected part (Mk11 or Plate)
on the system. The res lt is displayed in Volts for the selected part.
5.3.2. Zero Adjust
If yo press b tton « » for NO in 5.3 Settings the device asks for a zero adj st:
Press «A» for a zero adj st or « » to leave the men . After pressing «A» the prompts whether
MK11 or Plate is installed:
For a proper zero adj st the meas ring head has to be gro nded:
Gro nd the meas ring head and confirm that by pressing b tton «A». Afterwards the zero adj st
is performed and the device ret rns:
Important: D ring the zero adj st external voltage m st not be connected to the device or the
meas ring head, beca se otherwise no proper zero adj st can be performed.
To perform a zero adjust without MK11 please mount the protective cap and confirm this as
gro nded MK11 in the men .
By mo nted Plate it is asked if the plate is free ? Then the plate is gro nded internal !
PLEASE WAIT !
CALI RATION !
GROUND MK11 ?
A<
YES
NO
>
MK11 FIXED ?
A<
YES
NO
>
ZERO ADJUST ?
A<
YES
NO
>
V-Mode: Plate!
A<
OK
CHANGE
>

13 Electrostatic Field Meter Mode
6. Electrostatic Field Meter Mode
For operation in electrostatic field meter mode the pper plate has to be removed. Νο
ΝοΝο
Νο meas ring
head may be installed.
6.1. Metering an Electrostatic Field
Only static (DC) fields can be meas red with the integrated electrostatic field meter
1
. The display
directly shows the electric field strength in (kilo)Volt/meter:
6.2. Adjust Range
By pressing b tton «A» the selected range can be changed. Yo can choose between the follow-
ing options:
6.3. Zero Adjust
The provided protective cap has to be mo nted on the mod lator system to perform a zero ad-
j st. After pressing «A» and « » sim ltaneo sly for abo t 1s the device asks whether a zero
adj st sho ld be performed:
Q it by pressing b tton « » or press «A» YES to advance. The device asks to p t on the protec-
tive cap:
P t the protective cap on the mod lator system and press «A» to perform the zero adj st. Press-
ing b tton « » closes the men .
7. Further Messages
In case of a damaged electrostatic field meter the device displays:
1
Freq enz f<1Hz
PUT ON COVER ?
A<
YES
NO
>
ZERO ADJUST ?
A<
YES
NO
>
EFIELD R=20kV/m
E = 0,0kV/m

14 Man al CPM 374
If the s pply voltage of the NiMH battery falls below 6.7 Volt, the device ret rns in the pper
line:
The battery has to be charged, altho gh the c rrent meas rement can be completed.
Important: Please se only the provided power s pply to charge the battery. Charging also
takes place while the device is switched off. The maxim m charge time for the switched off de-
vice is abo t 14 ho rs.
If the s pply voltage falls below 6.4 Volt, the display shows
before the device powers off a tomatically to prevent total discharge of the battery. Total dis-
charge can lead to damage or breakdown of the battery!
8. Warranty
In case of proper operation according to the man al we iss e a g arantee of 24 months. Mechan-
ical damage and battery destr ction by wrong handling are excepted.
Guarantee expires on opening the device!
9. Grounding
To provide acc rate evidence of the polarity and magnit de of the field meas red, the device has
to be gro nded properly. To this end connect the instr ment at the gro nding jack with gro nd.
10. Warning Notices
•The instr ments are not accredited for meas rements in explosion-proof areas. Mea-
s rements in power plants are not permitted!
•Alternating fields f > 1 Hz cannot be meas red
•Spark discharge on the mod lator system m st be avoided
•Do not connect the switched off device to the mains adapter for longer periods (max.
14h), overloading may occ r
AUTO OFF
LOW ATTERY !
LOW ATTERY !
EFM DEFECT !
REPAIR IS NEEDED

15 Maintenance and Calibration
1)
11. Maintenance and Calibration
The PTFE spacers need to be kept clean (free of grease), therefore sho ld not be to ched by
hand. If the voltage decrease nder normal s rro nding conditions witho t ion so rce is larger
than 100V/min, the spacers have to be cleaned with acetone or comparable.
The recommended calibration interval is 1 year
12. Important Information
D ring air ionization meas rements please note :
As the plate electrode is ins lated it has to be protected from electrostatic ind ction. Electrostat-
ic ind ction can be effected by a person passing by or by moving a charged object close to the
instr ment. External static fields ca sed by high charges in the instr ments s rro nding have to
be avoided.
13. Scope of Delivery
The charge plate monitor CPM 374 is delivered with:
•Charge Plate Monitor CPM 374
•Cond ctive transport case
•Wall power s pply prim. 230V/50Hz sec. 12V DC/750mA
•Voltage meas ring head MK11
•PTFE meas ring line 1m
•Alligator clip
•Gro nding cable
•Serial PC cable
•3 spacers
•Man al
•Declaration of factory calibration
•CD with Excel software and man al

16 Man al CPM 374
©2008 Kleinwächter GmbH