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PICOAMMETER TYPE CP10A

 CP10A

INTRODUCTION

The picoammeter CP10A is a small mains powered instrument for measuring DC currents with 10 full scale ranges of 1.0x10-3 to 1.0x10-12A. 

 

A front panel LCD has a full scale reading of 10.00 and a rear panel socket provides access to a voltage proportional to input current.  A front panel control enables the output to be offset by ±100mV to facilitate driving unipolar V ® F converters.  A rear panel mounted ‘D’ socket provides indication of range, status and power for a remote indicator.  A front panel switched output smoothing control provides risetimes of 100m sec to 300m sec in 8 positions with a 1, 3, 10 sequence.  The backlit LCD brilliance is front panel adjustable. 

 

SPECIFICATION

At 20°C and after 10 min settling period and output offset nulled.

 

Error and Stability

Range (FSD)

Error %

Int. DPM

Error %

Analogue Out

Temp Coef.

PPM/°C

Stability typ.

± % per annum

10x10-4

1.5

1

±50

0.1

10x10-5

1.5

1

±60

0.1

10x10-6

1.5

1

±50

0.1

10x10-7

1.5

1

±60

0.1

10x10-8

2.5

2

±150

0.2

10x10-9

2.5

2

±160

0.2

10x10-10

2.5

2

±150

0.2

10x10-11

2.5

2

±160

0.2

10x10-12

3.5*

3*

-1000 typical

0.5

10x10-13

3.5*

3*

-1000 typical

0.5

 

* This does not include the error due to residual current.

 

Virtual Earth Potential

Initial                             within 20mV

With temperature           ±10mV/°C

With time                      ±50mV per 12 months

With signal                    10mV

 

Residual current

2x10-14A max

Output Smoothing Risetime (10-90%)

100, 300mSec, 1, 3, 10, 30, 100, 300mSec

 

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