Chauvin Arnoux C.A 6255 Manuel utilisateur

C.A 6255 MICROHMETER

READ the user manual carefully

COMPLY the precautions for use

FUNCTIONS OF THE KEYS

The secondary functions of the keys (written in yellow Italics below each key) can be accessed by

a short press on the yellow key, then on the key concerned.

Activate the secondary function of a keys. The symbol appears on the screen.

Before starting the measurement, select the desired measurement mode: inductive mode,

noninductive mode or non-inductive mode with automatic triggering.

Select the metal for the temperature compensation calculation: Cu, Al, or Other metal

Activate/deactivate the temperature compensation function to calculate the resistance

measured at a temperature other than the measurement temperature.

Activate/deactivate the alarms. The directions and high or low triggering values are

adjusted in SET-UP

Store the measurement at an address identified by an object number (OBJ) and a test

number (TEST). Two presses on MEM are required = confirmation of the location (can be

changed using the ▲▼ and ►keys), then storage.

Retrieve stored data (this function is independent of the setting of the switch) except in

the OFF and SET-UP positions. The data are viewed using the ▲▼ and ►keys. The

R(θ), and ALARM keys can be used.

In SET-UP mode, select a function or increment a flashing parameter.

In SET-UP mode, select a function or decrement a flashing parameter

Select the parameter to be modified (in wraparound mode, from left to right). In SET-UP

mode, access the adjustments of a function.

In SET-UP mode, shift the decimal point and select the unit.

Immediate printing of the measurement to a serial printer. If the temperature

compensation function has been activated, the calculated result and the temperatures

concerned are also printed.

Print stored data to a serial printer.

1st press: the starting OBJ:TEST number appears on the secondary display and the

ending number on the main display (they can be changed using the ▲▼ and ► keys);

press PRINT again to start printing.

Activate/deactivate the backlighting of the display unit.

Activate and adjust the sound level/deactivate the audible signal.

Parameter to be

modified Key Display

Main Secondary Symbol



(1st push)

Communication Prnt rS -



(2nd push)

BUZZ

Buzzer sound level

- BUZZ



(3epush)

EdSn

Display of serial no. Number Edsn -



(4epush)

EdPP

Display of

program no.

Number EdPP -



(5epush)

Lan9

Printing language L9F Lan9 -



(6epush)

trEF

Reference temp.

Value trEF °C



(7epush)

tAnb

Ambient temp.

nPrb tAnb °C



(8epush)

nEtA

Metal selection Value nEtA

Cu or AI or

Other metal



(9epush)

ALPH

Other metal coeff.



Coeff.

value

ALPH Other metal



(10epush)

dE9

Temperature unit

dE9c dE9 -



(11epush)

ALAr

Alarms (values and

directions)

Value ALAr ALARM +



(12epush)

LI9H

Duration of

baclighting T = 1 LI9ht -



(13epush)

nEn

Erasure of memory

dEL nEn -

Value Changing of values

Prnt / OFF / tri9 / PC / ut100

+ rate - type of communication : successive presses on 

- speed regulation: then 

Low / hight or OFF - successive presses on 

- -

Fr / 9b - press on 

-10 … 55°C - press on to change the digit

- press on to change the value of the digit

Prb or nPrb

if nPrb : -10 … 55°C

- presence or absence of sensor 

- if nPrb : then - press on to change the digit

- press on to change the value of

the digit

Cu or AI or Other metal - successive presses on 

0 … 100,00 (10-3 /°C) - press on to change the digit

- press on to change the value of the digit

dE9c (°C) or dE9F (°F) - press on 

ALARM 1 or 2 / or /

5mΩto 2500Ω- choice of parameter to change : successive presses on 

- modification of the parameter: 

1 mn / 5 mn / 10 mn or OFF - press on 

dEL or dEL O

(all memory or object) - press on then 

LIST OF CODED ERRORS

Err 1 Battery charge too low

Err 2 internal problem

Err 3 Impossible to measure battery charge

Err 4 Impossible to measure temperature

Err 5 Internal temperature too high - Let the instrument cool down

Err 6 Measuring current not established

Err 7 Measurement out of range

Err 8 Internal problem

Err 9 Measurement cycle stopped

Err 10 Temperature sensor incorrectly connected or missing

Err 11 Current-circuit wires incorrectly connected

Err 12 Voltage-circuit wires incorrectly connected or measured resistance too high

Err 13 Residual voltage too high

Err 21 Adjustment out of bounds

Err 22 Measured value out of bounds

Err 23 Edition out of bounds

Err 24 Cannot write to back-up memory

Err 25 Cannot read in back-up memory

Err 26 Memory full

Err 27 Memory empty: no data available

Err 28 Memory check problem

Err 29 Object or test number incorrect

Warning:

If error message 2, 3, 4, or 8 appears, the instrument must be switched off and sent to a

qualified organization for repair.

695533A02_Ed1_05/2017

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