Fluke 8842a instruction manual Front Panel Feature, Corresponding Command, Comments

Maintenance 6

CALIBRATION

Table 6-14. Commands Used During remote Calibration

FRONT PANEL

FEATURE

Display

Function Buttons

Range

CORRESPONDING

COMMAND

G2

F1 through F6

R1 through R6 and R8

COMMENTS

Loads the calibration prompt into the output buffer. Not valid when the 8842A is taking verification readings.

In the calibration mode, these select the Offset and Gain Calibration procedure for the corresponding funtion.

In the calibration mode, these select the Offset and Gain Calibration Procedure for the corresponding range in the presently selected function. (For entering variable inputs, see VAR IN below.)

STORE

A/D

HF AC

ERASE

RATE

VAR IN

--

C0

C1

C2

C3

S0 through S2

N<value>P2

P3<string>

Tells the 8842A that the requested calibration input is valid. This command causes the 8842A to take readings, and compute and store calibration constants.

NOTE

The C0 command can take up to 22 seconds to execute. You must determine when this command is complete before sending more commands. See Timing Considerations in text.

Selects the A/D Calibration procedure.

Selects the High-Frequency AC Calibration procedure.

After receiving this command the display shows the erase mode prompt (‘cl’). (The prompt is not loaded into the output buffer.) To complete the erasure you must then send C0. Sending any other command after the C3 command causes the 8842A to return to its previous state. There is no timeout as with the front panel ERASE button.

CAUTION

The command string “C3 C0” erases the entire calibration memory. A complete calibration must then be performed.

Changes the reading rate while the 8842A is taking verification readings. Causes an error at any other time during calibration.

Enters <value> as a variable input. (See Entering Variable Inputs, in text.) Causes an error if sent during A/D Calibration or when the 8842A is taking verification readings. You can check that the command was successful by checking the error status or by sending the Get Calibration Input command (G2).

Puts the <string> into calibration memory. The string must contain up to 16 ASCII characters, and be recalled with the G3 command.

NOTE: Other commands that may be used during calibration are: P1 (Put SRQ mask); the remaining Get commands; and X0 (clear Error Register).

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