CM 101 - Multimeter BENNING - Free user manual and instructions

USER MANUAL CM 101 BENNING

TRUE RMS digital current clamp Multimeter for - DC/ AC voltage measurements - DC/ AC current measurements - resistance measurements - continuity and diode tests - capacity measurement - frequency measurement Table of contents

3. Scope of delivery

5.3 Data transmission to the smartphone/ tablet

8. Measuring with the BENNING CM 10-1

10. Technical data of measuring accessories

This operating manual is intended for - skilled electricians and - electrotechnically trained personnel. The BENNING CM 10-1 is intended for measurements under dry ambient condi- tions. It must not be used in electrical circuits with a nominal voltage higher than 1000 V AC/ DC (see section 6 „Ambient conditions“ for details). The following symbols are used in this operating manual and on the BENNING CM 10-1: Application around and removal from HAZARDOUS LIVE conductors is permitted.

Warning of electrical danger! Indicates instructions which must be followed to avoid danger to per- sons.

Attention! Must comply with documentation! This symbol indicates that the information provided in the operating man ual must be complied with in order to avoid risks. CAT II Measuring category II is applicable to testing and measuring circuits which are directly connected to user connections (sockets and similar connections) of the low-voltage mains installation. CAT III Measuring category III is applicable to testing and measuring circuits connected to the distribution circuit of the low-voltage mains installation of a building. CAT IV Measuring category IV is applicable to testing and measuring circuits connected to the feed-in point of the low-voltage mains installation of a building.

This symbol on the BENNING CM 10-1 indicates that the BENNING CM 10-1 is equipped with protective insulation (protection class II). Please observe the operating manual! This symbol on the BENNING CM 10-1 means that the BENNING CM 10-1 complies with the EU directives.23

This symbol appears on the display to indicate a discharged battery. This symbol indicates the “diode-testing” application. This symbol designates the „continuity test“ eld. The buzzer is intended for acoustic result output. This symbol marks the range “capacity testing”. (DC) Direct voltage or current.

Ground (voltage against ground)

2. Safety instructions

The instrument is built and tested in accordance with DIN VDE 0411 Part 1/ EN 61010-1 DIN VDE 0411 Part 2-032/EN 61010-2-032 DIN VDE 0411 Part 2-033/EN 61010-2-033 DIN VDE 0411 Part 031/EN 61010-031 and has left the factory in perfectly safe technical condition. To preserve this condition and to ensure safe operation of the device, the user must observe the notes and warnings given in these instructions at all times. Improper handling and non-observance of the warnings might involve severe injuries or danger to life.

WARNING! Be extremely careful when working with bare con- ductors or main line carrier! Contact with live conductors will cause an electric shock!

The BENNING CM 10-1 must be used in electrical circuits of overvoltage category III with a conductor for a maximum of 1000 V to earth only or of overvoltage category IV with a conductor for a maximum of 600 V to earth only. Only use suitable measuring leads for this. With measurements within measurement category III or measurement category IV, the projecting conductive part of a contact tip of the measuring leads must not be longer than 4 mm. Prior to carrying out measurements within measurement cat- egory III and measurement category IV, the push-on caps pro- vided with the set and marked with CAT III and CAT IV must be pushed onto the contact tips. The purpose of this measure is user protection. Please observe that work on live parts and electrical compo- nents of all kinds is dangerous! Even low voltages of 30 V AC and 60 V DC may be dangerous to human life!

In order to prevent any danger, always measure a present volt- age first without low-pass filter (without high-frequency sup- pression) to detect a dangerous voltage.

Before starting the current clamp multimeter, always check the device as well as all measuring leads for damages. If it can be assumed that safe operation is no longer possible, switch the device o󰀨 immediately and secure it against unintended operation. Safe operation can be assumed to be no longer possible, if - the device or the measuring leads exhibit visible damages, - the device no longer works, - the device has been stored under unfavourable conditions for a longer period of time, - the device was exposed to extraordinary stress during transport, or - if the device or the measuring leads are exposed to moisture.24

In order to prevent danger - do not touch the bare contact tips of the measuring leads, - plug the measuring leads into the correspondingly marked measuring sockets of the multimeter and check them for tight fit.

Maintenance: Do not open the multimeter, because it contains no components which can be repaired by the user. Repair and service must be carried out by qualified personnel only!

Cleaning: Regularly wipe the housing by means of a dry cloth and clean- ing agent. Do not use any polishing agents or solvents!

3. Scope of delivery

The scope of delivery of the BENNING CM 10-1 comprises:

3.1 One BENNING CM 10-1

3.2 Two safety measuring lead, red/ black (L = 1.4 m) (part no. 044145)

3.3 One compact protection carrying case

3.4 Two 1.5 V batteries (type AA/ IEC LR6) for initial assembly is integrated

3.5 One operating manual

Note on optional accessory: - Flexible AC current transformer BENNING CFlex 1 (part no. 044068) Alternating current ranges: 30 A/ 300A/ 3000 A Parts subject to wear: - The BENNING CM 10-1 is supplied by means of two integrated 1.5 V batter- ies (AA/ IEC LR6). - With the protective caps being attached, the safety measuring leads men- tioned above (tested accessories, item no. 044145) comply with CAT III 1000 V/CAT IV 600 V and are approved for a current of 10 A.

4. Device description

See gure 1: Device front The display and operating elements shown in gure 1 are designated as follows:

Measuring clamp, for clamping on the single-wire live conductor,

Bulge for current clamp, protects against contact with conductor,

LED (red) for voltage indicator and continuity test

Opening lever, for opening and closing the current clamp, for activation of the measuring point illumination

HOLD/ZERO key, measured value storage respectively ZERO for null bal- ance (ADC)

Rotary switch, for selecting the measuring function,

key, for activation of the Bluetooth

MIN/MAX-key, storage of highest and lowest measurement value, resp. Volt- sense function

MODE key (blue), for selecting the measuring function/secondary function, resp. display illumination

Polarity indication,

Battery condition indicator,

COM jack, common jack for voltage/ resistance/ frequency/ capacity mea- surements, continuity tests and diode tests

This is what the automatic polarity indication for DC current and DC voltage refers to

5. General information of the digital current clamp multimeter

is designed as a 4 digit liquid crystal indicator with 15 mm digit height and decimal point. The highest value displayed is

functions automatically. Only a polarity con- trary to the socket denition is indicated as “-“.

5.1.3 The range overload will be displayed with “OL” or “- OL”.

Attention: No indication and prior warning in the event of an overload condition! A exceeding of dangerous contact voltage (> 60 V DC/ 30 V AC rms) is indicated by an additional ashing symbol „()“.

5.1.4 The BENNING CM 10-1 conrms each button press with a signal sound.

Invalid button presses are conrmed by a double signal sound.

5.1.5 The nominal measurement rate of the BENNING CM 10-1 is 3 measure-

ments per second (sec) for the digital display.

5.1.6 The BENNING CM 10-1 is switched on and o󰀨 by the rotating switch

Switch-o󰀨 position “OFF”.

has two functions: HOLD key function: Press the HOLD/ZERO key

to store the measuring result. At the same time, the digital display

shows the “ HOLD ” symbol. If the measured value exceeds the stored value by 50 digits, the change of the measured value is indicated by the display ashing and an acoustic signal. (Changes of measured values between AC and DC voltage / current will not be recognized). Press the key again to switch the device back to the measuring mode. ZERO key function: For null balance in case of current measurements with the A DC function. For this, remove the BENNING CM 10-1 from all live conductors and press the HOLD/ ZERO key

for 2 seconds until the “ ZERO ” symbol is displayed.

has two functions: Bluetooth

interface with the “ “ symbol being shown on the LC display

at the same time. Press the key again to disable the Bluetooth

interface. LOG function (data logger/measured value memory): Press the key for approx. 2 seconds to enable the LOG function with the

at the same time. See

has two functions: HFR function (low pass filter): The HFR function is intended for connecting a low-pass lter (high-fre- quency suppression) in the V AC and A AC functions in order to lter out high-frequency pulses e. g. at pulsed motor drives. “ HFR ” symbol on the LC display

. The limiting frequency (- 3 dB) of the lter is fg = 800 Hz. When reaching the limiting frequency fg, the displayed value is lower by a factor of 0.707 than the actual value without lter. Press the key again to switch back to normal operating mode. without HFR (without low-pass filter) with HFR (with low-pass filter)

In order to prevent any danger, always measure a present volt- age first without low-pass filter (high-frequency suppression) to detect a dangerous voltage.

INRUSH function (inrush current measurement): In measuring mode “A AC”, press the HFR key

for approx. 2 sec- onds to enable the inrush current measurement. At the same time, the digital display

shows the symbol. Press the key again to select a suitable measuring range. The INRUSH function initiates a measuring process for 100 milliseconds after a trigger current is applied. The aver- aged value of this time period is displayed. Press the key

for approx. 2 seconds to switch back to the measuring mode. Trigger current: (> 0.5 A in the 60 A measuring range, > 5 A in the 600 A measuring range, > 50 A in the 1500 A measuring range)26

engine off trigger point engine

has two functions: MAX/MIN function: The MIN/MAX function automatically records and stores the highest and the lowest measured value. By pressing the key again, the following values are displayed: “MAX/MIN” displays the current measured value,

to pause the MIN/MAX function. Press the key for approx. 2 seconds to switch back to normal operating mode. Voltage indicator function: Press the key for approx. 2 seconds to enable the voltage indicator func- tion (VoltSense) for non-contact detection of an alternating eld (see

has two functions: Press the MODE key (blue)

to select the secondary or third function of the rotary switch position. Press the key for approx. 2 seconds to enable or disable the display illumination.

5.1.12 The BENNING CM 10-1 switches o󰀨 automatically after approx. 20 min-

utes (APO, Auto-Power-O󰀨). It switches on again if the rotary switch is switched on from switch position “OFF” or if a key is pressed. The switch-o󰀨 time can be set (see section 5.1.13).

5.1.13 The BENNING CM 10-1 o󰀨ers individual setting possibilities. To change

a setting, press one of the following keys and simultaneously switch on the BENNING CM 10-1 from the “OFF” position. MODE key (blue)

Setting the APO time to 5/10/20 min. or switching off the APO function, “OFF” is shown on the display. Each time the key is pressed again, the value changes. HOLD/ZERO key

Displaying the firmware version

5.1.14 Temperature coe󰀩cient of the measured value: 0.2 x (stated measuring

accuracy)/ °C < 18 °C or > 28 °C, related to the value for the reference temperature of 23 °C.

5.1.15 The BENNING CM 10-1 is supplied by means of two 1.5 V batteries (IEC

5.1.16 The battery indication

continuously shows the remaining battery ca- pacity via a maximum of three segments. When switched on, the device additionally displays the battery status “Full” (full), “HALF” (half) or “Lo” (low).

As soon as all segments of the battery symbol have disappeared and the battery symbol is flashing, the batteries must be re- placed by new ones immediately in order to prevent danger for persons caused by incorrect measurements.

5.1.17 The battery life is approximately 300 hours without using the display

illumination and the Bluetooth

Weight: 490 g with batteries

5.1.19 Current clamp opening: 42 mm

5.1.20 The safety measuring leads supplied are expressly suited for the rated

voltage and the rated current of the BENNING CM 10-1.

5.1.21 The BENNING CM 10-1 supports wireless data transmission via the

4.0 standard to an Android or IOS device (smartphone/tab-

The data logger (LOG) allows the automatic and manual storage of series of measurements with a predened measuring interval (sampling rate) and up to 4000 measured values. The measuring interval can be set from 1 s to 60 s. The measured values can be read out later via Bluetooth

for further processing.

and simultaneously switch on the BENNING CM 10-1 via the rotary switch

. The current setting is shown by a symbol on the digital display

. As soon as the symbol appears, press the Bluetooth

repeatedly to select from the following functions: Symbol: Function: „LOG“ Automatic storage with predened measuring interval „SAVE“ Manual storage by pressing a key „CLR“ Deleting the internal measured value memory A selected function will be automatically accepted after 2 seconds and remains permanently stored. Press

Set the data logger to automatic storage „LOG“ with predened measuring inter- val according to section 5.2.1. To enable the data logger, press the Bluetooth

for 2 seconds until the „ LOG “ symbol and the set measuring interval are shown on the digital display

. As soon as the measuring interval is shown, directly press the Bluetooth

to set the measuring interval to 1 s, 5 s, 10 s, 30 s or 60 s. After having selected the desired measuring interval, the data logger starts sto- ring measured values in the internal memory automatically after 2 seconds. If the data logger is enabled, the symbol “ LOG ” is ashing. Press the Bluetooth

for 2 seconds to stop the data logger. Note: Each start of the data logger „ LOG “ deletes the internal memory and thus all stored measured values. LOG 2 SecPressPress Press >2 Sec Press >2 Sec LOG 2 Sec Wait 2 Sec28

Set the data logger to manual storage “SAVE” by pressing a key according to

for 2 se- conds until the „ LOG “ symbol on the digital display

ashes. Each time the HOLD key

is pressed, the current measured value is stored in the internal memory and the corresponding storage location number is briey shown on the digital display

. Manual storage is stopped by pressing the Bluetooth

for 2 seconds. Note: The rst start of the manual storage “SAVE” deletes the internal memory and thus all stored measured values of the data logger “LOG”. The manual storage „SAVE“ can then be started and stopped several times. The measured values are continuously stored in the internal memory at the storage locations 0001 to 4000. LOG 2 Sec HOLD Press LOG 2 Sec >2Sec

5.3 Data transmission to the smartphone/ tablet

The BENNING CM 10-1 is provided with a Bluetooth

Low Energy 4.0 interface for real-time wireless transmission of measured values to an Android or IOS device. The “BENNING MM-CM Link” app required for this is available in the Google Play Store and in the Apple App Store. Google Playstore App Store The “BENNING MM-CM Link” app o󰀨ers i.a. the following functions: - Displaying of the measured values in real time and storage as CSV le. - Download of the data logger LOG (up to 4,000 measured values) from the BENNING CM 10-1. To activate the Bluetooth

at the BENNING CM 10-1 (symbol “ ” ashes). As soon as a Bluetooth

connection is established, the symbol “ ” is displayed permanently. Range in open space: approx. 10 m

6. Ambient conditions

- The BENNING CM 10-1 is intended for making measurements in dry envi- ronment. - Maximum barometric elevation for making measurements: 2000 m, - Overvoltage category / installation category of the BENNING CM 10-1: IEC 60664/ IEC 61010 → 600 V category IV; 1000 V category III - Contamination class: 2, - Protection class: IP 30 (DIN VDE 0470-1, IEC/ EN 60529) IP 30 means: Protection against access to dangerous parts and protection against solid impurities of a diameter > 2.5 mm, (3 - first index). No protection against water, (0 - second index). - Operating temperature and relative humidity: For operating temperatures from 0 °C to 30 °C: relative air humidity lower than 80 %, For operating temperatures from 31 °C to 40 °C: relative air humidity lower than 75 %, For operating temperatures from 41 °C to 50 °C: relative air humidity lower than 45 %. - Storage temperature: The BENNING CM 10-1 can be stored at temperatures between - 10 °C and + 60 °C, at a relative air humidity lower than 80 % with- out batteries.29

Note: The measuring precision is specied as the sum of - a relative fraction of the measured value and - a number of digits (counting steps of the least signicant digit). This specied measuring precision is valid for temperatures in the range from 18 °C to 28 °C and relative humidity less than 80 %. The stated accuracy is specied for 1 % to 100 % of the nal measuring range value. Additional specifications for AC functions: The measuring value is gained and indicated as e󰀨ective value (True RMS, AC coupling). In case of non-sinusoidal curves, the indicating value becomes inaccu- rate. Thus, an additional error occurs for the following crest factors: crest factor from 1.0 to 2.0 additional error + 3.0 % crest factor from 2.0 to 2.5 additional error + 5.0 % crest factor from 2.5 to 3.0 additional error + 7.0 % Maximum crest factor of the measuring signal: crest faktor 3.0 @ 3000 digits crest faktor 2.0 @ 4500 digits crest faktor 1.5 @ 6000 digits Measured values < 20 digits are set to 0 on the digital display

Square-wave signals are not specied. HFR function (low-pass filter) additional error for functions VAC, AAC and (exible AC current transformer) ± 4 % with regard to the specied measuring accuracy (45 Hz to 200 Hz) Limiting frequency fg (- 3 dB): 800 Hz

7.1 Voltage ranges (V AC, V DC)

Function Measuring range Resolution Measurement accuracy V AC

Function Measuring range Resolution Measurement accuracy LoZ

Function Measuring range Resolution Measurement accuracy A AC [1] [2]

additional error for functions AAC and (exible AC current transformer) ± 3 % with regard to the specied measuring accuracy Average time: 100 ms Trigger current: > 0.5 Ae󰀨 in the 60 A measuring range, > 5 Ae󰀨 in the 600 A measuring range, > 50 Ae󰀨 in the 1500 A measuring range

7.4 Resistancemeasuringranges(Ω),continuityanddiodetesting

Function Measuring range Resolution Measurement accuracy* Resistance

• Before the measurement, a possible o󰀨set must be determined by short-cir- cuiting the measuring leads and subtracting them from the measured value. Overload protection: 1000 VAC/DC Max. open circuit-voltage: approx. 1.8 V The built-in buzzer sounds when resistance is less than 20 Ω to 200 Ω. Response time: < 100 ms Acoustic indication: 2.7 kHz

7.5 Capacity ranges (µF)

Conditions: Capacitors discharged and connected in accordance with the pola- rity stated. Measuring range Resolution Measurement accuracy

Measuring range Resolution Measurement accuracy

Measuring range (1 mV/ 1 A) Resolution Measurement accuracy [1]

± 1.5 % + 7 digits (45 Hz - 400 Hz) 3000 A 1 A [1] The measuring accuracy of the exible current transformer BENNING CFlex 1 (item no. 044068) has not been taken into consideration. Overload protection: 1000 VAC/DC31

8. Measuring with the BENNING CM 10-1

8.1 Preparation for measuring

Store and use the BENNING CM 10-1 only under the correct temperature condi- tions stated. Always avoid longer exposure to sunlight. - Check the rated voltage and rated current stated on the safety measuring leads. The safety measuring leads supplied with the unit are suitable for the rated voltage and current of the BENNING CM 10-1. - Check the insulation of the safety measuring leads. If the insulation is dam- aged in any way, do not use the leads. - Check the continuity of the safety measuring leads. If the conductor in the safety measuring lead is interrupted, do not use the leads. - Before selecting another function with the rotating switch

, always discon- nect the safety measuring leads from the measuring point. - Sources of strong current in the vicinity of the BENNING CM 10-1 may cause unstable or incorrect readings.

8.2 Voltage/ frequency measurement

Do not exceed the maximum permitted voltage with respect to earth potential! Please observe the overvoltage category of the electric circuit! Attach the protective caps (CAT III/IV) to the contact tips be- fore making measurements in circuits of overvoltage category CAT III or IV. Electrical danger! The highest voltage that may be applied to the jacks - COM jack

of the BENNING CM 10-1 against ground is 600 V CAT IV/ 1000 V CAT III.

8.2.1 Voltage/ frequency measurement (switch position: ,

to select the required function , or LoZ on BENNING CM 10-1. - Connect the black safety measuring lead to the COM jack

of the BENNING CM 10-1. - Connect the red safety measuring lead to the jack +

of the BENNING CM 10-1. - Bring the safety measuring leads into contact with the measuring points and read the measured value on the digital display

of the BENNING CM 10-1. - In the function, the MODE key (blue)

can be used for switching over to frequency measurement (Hz). - In the function, the MODE key (blue)

can be used for switching over to the mV range. see g. 2: Direct voltage measurement see g. 3: Alternating voltage measurement (frequency measurement) Note: On the digital display

, the “LoZ” function (AutoV) is displayed by the “LoZ” symbol. It automatically determines the required measuring function (AC/ DC voltage) and the ideal measuring range. Moreover, the input resistance is re- duced to approx. 3 kΩ in order to suppress inductive and capacitive voltages (reactive voltages).

8.3 Current/ frequency measurement (switch position ,

Do not apply any voltage to the input jacks

of the BENNING CM 10-1! Any possibly connected safety measuring leads have to be removed. - Use the rotary switch

to select the required function or

(2s) to set the BENNING CM 10-1 to the starting point (only DC coupling mode). - Operate opening lever

single wire live conductor centrally by means of the BENNING CM 10-1 current probe. - In the function, the MODE key (blue)

can be used for switching over to frequency measurement (Hz). - Read off the digital display unit

see g. 4: Direct/ alternating current measurement (frequency measurement)

- Connect the black safety measuring lead to the COM jack

of the BENNING CM 10-1. - Connect the red safety measuring lead to the jack +

of the BENNING CM 10-1. - Bring the safety measuring leads into contact with the measuring points and read the measured value on the digital display

of the BENNING CM 10-1. see g. 5: Resistance measurement/ continuity and diode test/ capacitance measurement

8.5 Continuity test with buzzer and LED (switch position )

to select the required function on BENNING CM 10-1. - Connect the black safety measuring lead to the COM jack

of the BENNING CM 10-1. - Connect the red safety measuring lead to the jack +

of the BENNING CM 10-1. - Press the MODE key (blue)

to enable the continuity test with buzzer/LED. - Bring the safety measuring leads into contact with the measuring points. If the line resistance between the COM jack

falls below a value between 20 Ω and 200 Ω, the integrated buzzer of the BENNING CM 10-1 sounds and the red LED

lights up. see g. 5: Resistance measurement/ continuity and diode test/ capacitance measurement

Discharge capacitors fully before measurement! Never apply voltage to the sockets for capacitance measurement as this may cause irreparable damage to the unit. A damaged unit may repre- sent an electrical hazard! - Use the rotary switch

to select the required function on BENNING CM 10-1. - Determine the polarity of the capacitor and discharge it completely. - Connect the black safety measuring lead to the COM jack

of the BENNING CM 10-1. - Connect the red safety measuring lead to the jack +

of the BENNING CM 10-1. - Press the MODE key (blue)

twice to enable the capacity measurement function. - Contact the discharged capacitor with the safety measuring leads observing correct polarity. Read the measurement value on the digital display

of the BENNING CM 10-1. see g. 5: Resistance measurement/ continuity and diode test/ capacitance measurement

to select the required function on BENNING CM 10-1. - Connect the black safety measuring lead to the COM jack

of the BENNING CM 10-1. - Connect the red safety measuring lead to the jack +

of the BENNING CM 10-1. - Press the MODE key (blue)

3 times to enable the diode test. - Bring the safety measuring leads into contact with the measuring points and read the measured value on the digital display

of the BENNING CM 10-1. - For a normal silicone diode located in flow direction, the flow voltage be- tween 0.400 V and 0.800 V is displayed. If “000” appears in the display, there may be a short circuit in the diode, „OL“ indicates an interruption inside the diode. - For a diode applied in reverse direction, „OL“ is displayed. If the diode is defective, „000“ or other values are displayed. see g. 5: Resistance measurement/ continuity and diode test/ capacitance measurement

8.8 Current measurement with the flexible AC current transformer

to select the required function on BENNING CM 10-1. - Connect the black safety measuring lead to the COM jack

of the BENNING CM 10-1. - Connect the red safety measuring lead to the jack +

CM 10-1. - Select the 3,000 A (1 mV/A) measuring range at the AC current transformer BENNING CFlex 1. - Clamp the single-wire live conductor centrally by means of the flexible mea- suring loop. - Read the measurement value displayed in the digital display

see g. 6: Current measurement with the exible AC current transformer BENNING CFlex 1

The voltage indicator function is not intended for testing the absence of voltage. Even without an indication or acoustic signal, a dangerous contact voltage might be applied. Electrical danger! - Use the rotary switch

for 2 seconds to enable the voltage indicator (VoltSense) until the ““ symbol on the digital display

flashes. Press the MIN/MAX key

to switch over to Hi (high sensitivity) or Lo (low sensitivity). - The voltage indicator function does not need any measuring leads (non- contact detection of an alternating field). The detector is located on the top side of the BENNING CM 10-1. In case of a phase voltage being localized, an acoustic signal is emitted and the red LED

on the top side of the device lights. An indication is shown in earthed AC mains only! Practical hint: Interruptions (cable breaks) in cables lying around openly such as e.g. cable reels, fairy lights etc. can be traced from the feeding point (phase) to the point of interruption. Functional range: ≥ 230 V

- Connect the black safety measuring lead to the COM jack

of the BENNING CM 10-1. - Connect the red safety measuring lead to the jack +

for 2 seconds to enable the voltage indicator (VoltSense) until the ““ symbol on the digital display

flashes. Press the MIN/MAX key

to switch over to Hi (high sensitivity) or Lo (low sensitivity). - Connect the red safety measuring lead with the measuring point (system part). - If an acoustic signal is emitted and the red LED

lights, the phase of an earthed alternating voltage is applied to this measuring point (system part). see g. 7: Voltage indicator with buzzer and LED

Before opening the BENNING CM 10-1, strictly observe that the device is free of voltage! Electrical danger! Working on the opened BENNING CM 10-1 under voltage must be carried out by skilled electricians special precautions for the prevention of accidents only! Make sure that the BENNING CM 10-1 is free of voltage as described below before opening the device: - First, remove both safety measuring leads from the object to be measured. - Then, remove both safety measuring leads from the BENNING CM 10-1. - Turn the rotary switch

to the switch setting “OFF”.

9.1 Securing the device

Under certain circumstances, safe operation of the BENNING CM 10-1 might no longer be ensured, e.g. in case of: - visible damage of the housing, - incorrect measuring results, - recognizable consequences of prolonged storage under inadmissible condi- tions and34

- recognizable consequences of extraordinary stress due to transport. In such cases, immediately switch o󰀨 the BENNING CM 10-1, disconnect it from the measuring points and secure it against further use.

Clean the exterior of the device with a clean dry cloth (exception: special cleaning wipers). Do not use any solvents and/or abrasives to clean the device. Make sure that the battery compartment and the battery contacts are not contaminated by leaking battery electrolyte. If there are electrolyte contamination or white deposits in the area of the battery or the battery compartment, clean these areas as well by means of a dry cloth.

9.3 Battery replacement

Before opening the BENNING CM 10-1, strictly observe that the device is free of voltage! Electrical danger! The BENNING CM 10-1 is supplied by means of two integrated 1.5 V batteries (AA/ IEC LR6). Battery replacement (see g. 8) is required as soon as all seg- ments of the battery symbol

have disappeared and the battery symbol is ashing. Proceed as follows to replace the battery: - Disconnect the safety measuring leads from the measuring circuit. - Remove the safety measuring leads from the BENNING CM 10-1. - Turn the rotary switch

to the switch setting “OFF”. - Lay the BENNING CM 10-1 face down and release the screws of the battery compartment cover. - Lift the battery compartment cover to remove it from the housing. - Remove the discharged battery from the battery compartment.

Insert the new batteries into the battery compartment observing correct polarity. - Place the battery comparment cover onto the bottom part and tighten the screw. See g. 8: Battery replacement

Make your contribution for environmental protection! Do not dispose of discharged batteries via the household waste. In- stead, return them to a collecting point for discharged batteries or spezial waste. Please look for information in your commu- nity‘s facilities.

Benning guarantees compliance with the technical and accuracy specications stated in the operating manual for the rst 12 months after the delivery date. To maintain accuracy of the measuring results, the device must be recalibrated in regular intervals by our factory service. We recommend recalibrating the device once a year. For this purpose, send the device to the following address: Benning Elektrotechnik & Elektronik GmbH & Co. KG Service Center Robert-Bosch-Str. 20 D - 46397 Bocholt

10. Technical data of measuring accessories

- Standard: EN 61010-031 - Maximum rated voltage to earth () and measuring category: Safety measuring lead (part no. 044145) With push-on caps: 1000 V CAT III, 600 V CAT IV Without push-on caps: 1000 V CAT II Maximum rated current: 10 A - Length: 1.4 m - Protection class II (

), continuous double or reinforced insulation - Contamination class: 2 - Ambient conditions: Maximum barometric height for measurements: 2000 m Temperature: 0 °C to + 50 °C, humidity 50 % to 80 % - Only use the test leads if in perfect and clean condition as well as according to this manual, since the protection provided could otherwise be impaired. - Replace the measuring lead if the insulation is damaged or the conductor/ connector is interrupted. - Do not touch the bare contact tips of the measuring leads. Only touch the35

area behind the grip limit intended for your hands! - Insert the bent terminals into the testing or measuring device.

11. Environmental note

At the end of product life, dispose of the unserviceable device via appro- priate collecting facilities provided in your community.36