West Control Solutions MRC 5000 Controller Manual - Manual (Page 22)

22
Section 5 Recorder Calibration Mode - CAL
As covered in Section 4, the "calibration seal" may need to be removed to access the MODE switch to gain access to the
calibration section. The MODE switch must be positioned to the PROG/TEST/CAL position.
CAUTION: DO NOT ATTEMPT ANY CALIBRATIONS WITHOUT THE PROPER TEST EQUIPMENT THAT MEETS OR
EXCEEDS THE SPECIFICATIONS LISTED.
The Calibration mode provides for the calibration of all the input types for each input as well as the calibration of each pen to
the chart.
The Input Calibration can be performed for ONLY the Input Type selected bt the hardware jumpers JU1 and/or JU2 AND
ONLY the Input Type selected in the Program Mode Input Selection code InPS. See below:
Input Type JU1 JU2 InPS
Thermocouple DOWN DOWN "1"
RTD PARK PARK "11"
mV PARK PARK "14"
mA MIDDLE MIDDLE "12"
V UP UP "17"
5.1 INPUT CALIBRATION - inP
EQUIPMENT REQUIRED:
Input source with accuracy better than
±
0.05% of reading.
Thermoucouple: 1 J type
1 mercury thermometer
±
.25ºF or equivalent
Allow 30 minutes of warm up time for the instrument with the T/C connected before
proceeding with calibration
DC: 0 to 50mV or
0 to 5V or
0 to 20mA
RTD: Decade resistance box with .01% resolution or equivalent.
PROCEDURE:
Position the input conditioning jumpers (JU1 for Pen 1 and JU2 for Pen 2) for the proper input (T/C, RTD, mV, mA or V). Be
sure that the Input Selection parameter InPS in Program Mode has been set correctly.
To enter the Calibration mode, depress SCROLL until CAL appears on the display. Press DOWN to enter the Calibration
mode. Depressing SCROLL will display the following Calibration sections: inP and Chrt. inP is the input calibration section
and Chrt is the Chart calibration section. Press DOWN to enter the desired section when it is displayed.
The Input Calibration section is divided into four sections: PEn, rAng, rEF, and SCAn. PEn selects the pen/input to be
calibrated, rAng selec!ts the input type (T/C, RTD, etc.) to be calibrated, rEF defines the source value to be applied, and
SCAn performs the actual calibration.
A 50mV Input calibration must be performed before the Cold Junction Compensation Calibration can be performed.
With PEn displayed, depress the SCROLL key to display the pen/input selected. Use the UP or DOWN keys to select 1 or 2,
then depress the SCROLL key and rAng should be displayed.
With rAng displayed, depress the SCROLL key to show the range code of the input type to be calibrated. The range codes
are shown below. Use the UP or DOWN keys to select the range to be calibrated:
0=None, means no calibration will be performed.
1=50 millivolts for all millivolt and thermocouple ranges.
2=5 volts for all volt ranges.