West Control Solutions MRC 9000 User Manual

Page 224

Edition 3
Rev G

11-2

Section 11

11.1 INPUT CALIBRATION

This routine allows for the calibration of all input channels and all input types.

Important Notes:

1. The calibration information is stored on each input board for all input types in an Electrically Erasable

Programmable Read Only Memory (EEPROM). The instrument and every input board supplied to the

field is shipped from the factory calibrated for each input type.

2. Recalibration should only be performed if it is determined that the Recorder is outside of the operating

specifications for the instrument itself (without considering the input source). Input Correction should be

used to correct for Input Signal inaccuracies.

3. If recalibration is necessary, it is only required for the particular input type and range that is being

used.

Step 1

With INPUT CALIBRATION in the lower display line, press the

to enter the Input Calibration. The upper

display line will display CALIBRATE INPUT and the lower display line will display IV1. If an input other than input

1 is to be calibrated, use the MOD, LEFT, SCROLL, UP or DOWN as required to select the proper input number,

then press the

Step 2

Press the

and the upper display line will display IVx CAL BOARD TYPE (x = input number selected) and

the lower display line will display TC/VOLT. If the input to be calibrated is TC/VOLT/mA, press the

to move

to the next step. If the input to be calibrated is RTD, press

, then F5, then

Step 3

IVX CAL WHAT RANGE should be in the upper display line and OFF - NO INPUT should be in the lower display

line. To calibrate, press the

, then UP, DOWN, LEFT, SCROLL as required to select the input range to be

calibrated per Table 11-2,

then press

TABLE 11-2 RANGE SELECT

Select

Input Is

TC WIDE

TC and not T, R, S, or B

TC NARROW

TC and other than above

RTD

CURRENT

25 mV

mV and maximum is 25 mV or less

100 mV

mV and maximum is 100 mV or less

1 VOLT

Volt and maximum is 1 Volt or less

10 VOLT

Volt and maximum is 10 Volts or less