Yokogawa CA12E User Manual

User’s

CA12E
HANDY CAL

Manual

In addition to this User’s Manual, there is another manual for the instrument,
IM CA12E-01E, which provides instructions for its safe use and explains its
functions. Refer to it as needed.

8. Calibration Procedure

■ Calibration Procedure

To maintain a high level of accuracy, it is recommended that the CA11E HANDY CAL be calibrated
annually. The “Selecting the Standards” section below presents calibration methods using the
recommended standards.

■ Selecting the Standards

Source feature

Items to be

calibrated

DCV Digital multimeter 100 mV Max.110 mV (0.005%+5 µV)

 Digital multimeter 400 

Measurement feature

Items to be

calibrated

DCV



■ Environmental Conditions for Calibration

Ambient temperature: 23  1°C
Relative humidity: 45 to 75% R.H
Warm-up: Warm-up time as specified for the standard

Names of

standards

Names of

standards

Standard DC
voltage generator

Decade resistance
box

(Temperature Calibrator)

Range

Range

100 mV 100 mV  0.01%

400  400 

Measuring

range

Max. 440 
Measuring
current: 1 mA

Generated

value

Accuracy Remarks

(0.005%+0.02 )

Accuracy Remarks

 0.01%

IM CA12E-02E

2nd Edition Nov. 2006 (KP)

Model 7561
(Yokogawa)
or equivalent

Model 7561
(Yokogawa)
or equivalent

Model 2552
(Yokogawa)
or equivalent

Model 279301
(Yokogawa) or
equivalent

-2-

Yokogawa Meters & Instruments Corporation
International Sales Dept.

Tachihi Bld. No.2, 6-1-3, Sakaecho, Tachikawa-shi,Tokyo 190-8586 Japan
Phone: [phone], Facsimile: 81-42-534-1426

YOKOGAWA CORPORATION OF AMERICA (U.S.A.)

Phone: [phone] Facsimile: 1-770-251-2088

YOKOGAWA EUROPE B. V. (THE NETHERLANDS)

Phone: [phone] Facsimile: 31-334-64-1610

YOKOGAWA ENGINEERING ASIA PTE. LTD. (SINGAPORE)

Phone: [phone] Facsimile: 65-6241-2606

YOKOGAWA AMERICA DO SUL S. A. (BRAZIL)

Phone: [phone] Facsimile: 55-11-5681-1274

YOKOGAWA MEASURING INSTRUMENTS KOREA CORPORATION (KOREA)

Phone: [phone] to -0664 Facsimile: 82-2-551-0665

YOKOGAWA AUSTRALIA PTY. LTD. (AUSTRALIA)

Phone: [phone] Facsimile: 61-2-9888-1844

YOKOGAWA INDIA LTD. (INDIA)

Phone: [phone] Facsimile: 91-80-2852-1441

YOKOGAWA SHANGHAI TRADING CO., LTD. (CHINA)

Phone: [phone] Facsimile: 86-21-6880-4987

YOKOGAWA MIDDLE EAST E. C. (BAHRAIN)

Phone: [phone] Facsimile: 973-336100

LTD. YOKOGAWA ELECTRIC (RUSSIAN FEDERATION)

Phone: [phone] Facsimile: 7-095-737-7869

IM3E-2006.2

■ Notice regarding the Manual

<1> The information contained in this Instruction Manual is subject to change without notice.
<2> Every effort has been made to ensure that the information contained herein is accurate.

However, should any concerns, errors, or omissions come to your attention, or if you have any
comments, please contact us.

CA12E

Input terminal Sensing terminal

3W
Lo

Lo

Hi

H

2000  range

L

Standard

DMM

<2>Calibration for 400- measurement

• Connection method
Connect the CA12E calibrator to the standard in a three-wire connection configuration for
calibration as shown below:

CA12E

■ Calibration Points

• The calibration points are as specified in the following tables.

• It is possible to independently select the necessary range to be recalibrated.

• Always calibrate the zero (0) point and full scale (FS) as a pair for generation.

Source: Measurement:

Calibration points Standard Value

100 mV

400 

*1: Make adjustments to CA12E according to the

reading of the standard (CA12E output value)
as specified in the table.

00 mV
FS 100 mV
00 m V
FS 400 

Standard Value

*1

Calibration points

100 mV FS 100 mV
400  FS 400 

*2: Set the value to the standard as specified in

the table.

■ Calibrating the Generation Feature

Operation procedure:

<1> Warm up the standard.
<2> Before turning on the power of the CA12E calibrator, connect it to the standard. Be sure to

remove the external RJ sensor.
<3> Turn on the power of the instrument.
<4> Simultaneously press and hold the [▲1] and [▼4] keys (shown in the figure in the “Assign-

ment of Keys for Calibration” section below) for about 2 seconds to enter the calibration

mode.
<5> Select the generation range to calibrate using the MEASURE/SOURCE selection switch

and range selection rotary switch. The display unit shows “CAL,” “SOURCE,” “ON,” “0,” and

the lower limit.
<6> Read the output value of the CA12E using the standard (digital multimeter), and using the

[▲] and [▼] adjustment keys adjust the CA12E so that the output value is set to the offset

value. Then press the [▼1] input determination (ENTER) key to fix the setting.

After fixing the setting, the display unit reading changes to “CAL,” “SOURCE,” “ON,” “FS,”

and shows a full scale of the range.
<7> Read the output value of the CA12E using the standard (digital multimeter), and using the

[▲] and [▼] adjustment keys adjust the CA12E so that the output value is set to the full

scale value. Then press and hold the [▼1] input determination (ENTER) key for about 1

second to fix the setting.

After fixing the setting, the display unit shows “0 FS” blinking. Re-press and hold the [▼1]

input determination (ENTER) key for about 1 second to write the calibration coefficients to

the EEPROM of the instrument. (This overwrites the previous calibration coefficients.)

When this is complete, the instrument returns to the status in Step 5.
<8> Repeat Steps 5 to 7 for each range to be calibrated.

To return to the previous step:

<9> To return to the previous step without fixing the setting, press the [▲1] input cancellation

key. Note that this is possible only before writing to the EEPROM.

To return to the normal operation mode:

<10>Simultaneously press and hold the [▲1] and [▼4] keys (shown in the figure in the “Assign-

ment of Keys for Calibration” section below) for about 2 seconds, or press the [POWER] key

to turn off the power once and then press it again to turn it back on.

■ Calibration Precautions

<1>Calibration for 400- generation

• Set resistance-measuring current to 1 mA (*)
(*) Check the specifications of the digital multimeter (DMM) to be used as the standard.
Example: Resistance-measuring current is 1 mA for the 2000 range of Model 7561

(Yokogawa).

• Connection method
Connect the CA12E calibrator to the standard in a four-wire connection configuration for
calibration as shown below:

3W
Lo

Lo

Hi

Decade

resistance box

400 

Standard

<3>Calibration for internal RJ compensation

*2

Because this calibration requires special equipment (a K-type thermocouple and 0°C reference
temperature chamber), contact the sales agent or office where the instrument was purchased,
or our office.

■ Assignment of Keys for Calibration

When the CA12E calibrator is in the calibration mode, keys are assigned as specified here.

CAL

0

1234

Input cancellation key

Input determination

(ENTER) key

Digit to be adjusted by the [▲4/▼4] adjustment keys

SOURCE

ON

Mode switching (calibration or normal)
(Press and hold two keys
simultaneously for 2 seconds.)

Adjustment keys (six keys)

■ Calibrating the Measurement Feature

Operation procedure:

<1> Warm up the standard.
<2> Before turning on the power of the CA12E calibrator, connect it to the standard. Be sure to

remove the external RJ sensor.
<3> Turn on the power of the instrument.
<4> Simultaneously press and hold the [▲1] and [▼4] keys (shown in the figure in the “Assign-

ment of Keys for Calibration” section below) for about 2 seconds to enter the calibration

mode.
<5> Select the measurement range to calibrate using the MEASURE/SOURCE selection switch

and range selection rotary switch.

"CAL” and “MEASURE” appear and “FS” blinks on the display unit.

(If a value nearly equivalent to full scale has been input, a measured value and “FS”

appear.)
<6> Set up the standard in order to input the full scale value to the instrument. Wait until the

reading stabilizes, then press and hold the [▼1] input determination (ENTER) key for about

1 second to fix the setting.
<7> After fixing the setting, “0” and “FS” indications on the display unit start blinking. Re-press

and hold the [▼1] input determination (ENTER) key for about 1 second to write the calibra-

tion coefficients to the EEPROM of the instrument. (This overwrites the previous calibration

coefficients.)
<8> Repeat Steps 5 to 7 for each range to be calibrated.

To return to the previous step:

<9> To return to the previous step without fixing the setting, press the [▲1] input cancellation

key. Note that this is possible only before writing to the EEPROM.

To return to the normal operation mode:

<10>Simultaneously press and hold the [▲1] and [▼4] keys (shown in the figure in the “Assign-

ment of Keys for Calibration” section below) for about 2 seconds, or press the [POWER] key

to turn off the power once and then press it again to turn it back on.

IM CA12E-02E <1>

9. Specifications

■ Source/Measurement Functions

Accuracy: (% of set value or reading + °C, µV, or ), at 23 5°C

Range

Selection

TC
*1

100 mV

400 
PT100 *2
JPT100

Range of Source/Measure

-200.0 to +1372.0°C

K

-200.0 to +1000.0°C

E

-200.0 to +1200.0°C

J

-200.0 to +400.0°C

T

-200.0 to +1300.0°C

N
R

0 to 1768°C

S

+600 to +1800°C

B

-200.0 to +900.0°C

L

-200 to +400°C

U

-10.00 to +110.00 mV

-200.0 to +850.0°C

-200.0 to +500.0°C

0 to 400 

Source *3 Measurement *4 Remarks

0.05%+1°C

0.05%+2°C

0.05%+3°C

0.05%+2°C

0.05%+4°C

0.05%+3°C

0.05%+0.5°C

0.05%+1°C

0.05%+30 V

0.05%+0.2 

0.05%+0.6°C

Accuracy

0.07%+1.5°C

0.07%+2°C

0.07%+3°C

0.07%+2°C

0.07%+4°C

0.07%+3°C

0.07%+1.5°C

0.07%+2°C

0.05%+30 V

0.05%+0.2 *5

0.05%+0.6°C*5

-100°C or above
Below -100°C

Below 100°C
100°C or above

Below 1000°C
1000°C or above

0°C or above
Below 0°C

Measurement range:
0 to 110.00 mV

Excitation current
*6

Temperature coefficient: 1/10 of accuracy/°C

*1: According to JIS C 1602-1995 (Reference Thermo-electromotive Force Table). L and U are determined

according to the DIN standard.

*2: According to JIS C 1604-1997 (Reference Resistance Table)

International Practical Temperature Scale of 1968 (IPTS68) for PT100 reference resistance
IPTS68 for PT100 is -200 to +650°C.

*3: The TC generation accuracy does not include the RJ accuracy.

The sensor output accuracy must be taken into consideration when output compensation is determined
based on the RJ temperature (output compensation performed every 4 seconds).

*4: When it is calculated according to the Reference Thermo-electromotive Force Table, the TC measuring

accuracy includes the RJ accuracy (TC accuracy added).

The terminal temperature must be stable.
*5: Three-wire measurement
*6: Excitation current for generation: 0.5-2 mA; Excitation current for measurement: approximately 2 mA

When the excitation current is 0.1 mA, 0.05% + 1°C (0.4 ) is added, and the maximum input capacitance of

the device under calibration is 0.1 µF.

Power supply: Four 1.5-V alkaline batteries (LR6, AA-size) or dedicated AC adapter

(sold separately)
Battery life: Approximately 55 hours (when running on alkaline batteries)
Automatic Power Off: After a period of approximately 10 minutes with no operations
Generation Signal Level Setting:

By four sets of up and down keys
Response of generator: Approximately 20 ms (between the time when the specified current is

supplied and the time when the output value enters the accuracy range)
Loading conditions: Less than 0.1 µF (DCV)
Measured-value indication updating intervals:

Approximately 1 second
Display: 7 segments LCD
Maximum allowable applied voltage:

42 V between each terminal and ground
Operating temperature and humidity range:

0 to 50°C, 20 to 80% R.H. (no condensation)
Storage temperature and humidity range:

-20 to 50°C, 90% R.H. or less (no condensation)
Dimension: Approximately 192 (H)  92 (W)  42 (D) mm (excluding protrusions)
Weight: Approximately 440 g
Accessories: Lead cables (B9108MT) for measurement and generation

(one set, consisting of two black cables and one red cable)
Terminal adapter (B9108KF)
2 manuals

Optional accessories: Dedicated AC adapter

(A1020UP: AC100 V, A1022UP: AC120 V, B9108WB: AC 220-240 V)
Carrying case (B9108NK)
Rubber boot (93038)
Strap (97040)
Accessory case (B9108XA)
RJ sensor: reference junction compensation (B9108WA)

Safety standards: EN61010-1 (only AC adapter B9108WB)

(A1020UP and A1022UP are excluded.)

EMC standards: EN61326 ClassB

EN55011 ClassB Group1
EN61000-3-2
EN61000-3-3

Immunity: EN61326

Performance criterion under immunity test environments: B
(self-returnable performance deterioration)

Test conditions of EMC and Immunity standards:

AC adapter (B9108WB), Lead cables (B9108MT) and RJ sensor
(B9108WA) are used.

Resolution

0.1°C

1°C

0.1°C

0.1 V

0.1 

0.1°C

10. How to Use the Carrying Case and Rubber Boot

■ Carrying case (B9108NK)

The carrying case (B9108NK) may be used as follows:

(1) Undo the fasteners on the top

and sides of the case cover to
open it.

Note: The fastener on the logo-side cannot be undone.

■ Rubber boot (93038) ■ Anti-skid pad

The optional rubber boot provides
shock protection and can be used
with a strap.

Note: When using the instrument with a rubber boot, the anti-skid pad at the bottom is not

needed. When used without a rubber boot in a leaning position, the supplied anti-skid
pad should be used.

■ Specifications of the External RJ Sensor *3 (Model: B9108WA)

Measuring range

-10 to +50°C

Accuracy (when combined with the instrument)

18 28°C: 0.5°C
Other ranges: 1°C

Cord length: Approximately 1.5 m
Compensation using the built-in sensor is also possible by adjusting the setting of the internal DIP
switch on the instrument.

(2) With the fastener on the logo-

side of the case centered, lift the
cover and pivot it to the side and
under the case itself.

Anti-skid pad
(supplied)

(3) Re-do the fasteners at the top

and sides of the cover.

IM CA12E-02E <2>