900C52-0021 Honeywell

Introduction

The DR4500A recorder does not require any periodic maintenance as such. But you will have to replace the 

ink cartridge, and replace the chart and optional chart lamp, as required.

CAUTION

Do not lubricate the plastic gears on the chart and pen motors.

Changing the ink cartridge

Follow the procedure in 88HTable 5-30 to clean the pen tip.

CAUTION

Be careful not to move the pen arm(s) during this procedure. The top arm is pen 1 (purple 

cartridge) and the bottom arm is pen 2 (red cartridge).

Table 5-30 Changing the ink cartridge

Step Action

1 Open the recorder door.

2 Pull the pen lifter up in order to raise the pen from the chart.

3 Unclip and remove the ink cartridge from the pen arm.

4 Remove the protective cap from the pen tip on the new cartridge and open its clip.

5 Slide the new cartridge onto the pen arm and close its clip.

6 Push the pen lifter down to lower the pen tips to the chart.

7 Close the door and resume normal operation.

Replacing a burned-out chart lamp (optional)

Follow the procedure in 89HTable 5-31 to replace a burned-out chart lamp.

Table 5-31 Replacing a chart lamp

Step Action

1 Open the recorder door and remove power.

2 Unscrew and remove the hood from the lamp assembly.

3 Push the (bayonet-type) lamp in and turn it counterclockwise to remove it from the socket.

4 Reverse step 3 and install the replacement lamp (General Instrument type 1828 or equivalent) 

in the socket.

5 Replace the hood on the lamp assembly.

6 Close the door and apply the power.

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