Honeywell DR4300 manual Current Output Calibration, Calibrator connections

Input and Output Calibration for Recorder with Display

5.6 Current Output Calibration

Introduction

Calibrate the recorder so that the output provides the required amount of current over the desired range. The recorder can provide an output current range of from 0 to 20 milliamperes and can be calibrated at

4 mA for 0 % of output and 20 mA for 100 % of output, or at any other values between 0 mA and 20 mA.

Equipment needed

You will need a standard shop type milliammeter, with whatever accuracy is required, capable of measuring 0 milliamps to 20 milliamps.

Calibrator connections

Refer to Figure 5-6and wire the recorder according to the procedure given in Table 5-10.

Table 5-10 Set Up Wiring Procedure for Current Proportional Output

Step Action

1With the power off, door open, and the chart plate swung out; tag and disconnect field wiring from the terminals on terminal block TB5 on the printed circuit assembly for pen 1 or pen 2 as applicable (see Figure 5-6).

2Observing polarity, connect a milliammeter’s leads to TB5 terminals.

3Close the chart plate: apply power and allow the recorder to warm up 15 minutes before you calibrate.

Main PCA Pen 2

Main PCA Pen 1

7

TB1

7

TB2 TB2

TB1

TB5 1

_

+

24189

Milliammeter

+

_

Figure 5-6 Test Equipment Connections for Calibrating Current Output

12/03 DR4300 Circular Chart Recorder Product Manual 153