Parr Instrument 1356 - Manual (Page 25)

25
Lengthening Post Period for 1356 Calorimeter
Gain entry to the factory menu by pressing the following three keys simultaneously from
the main menu.
1. Hidden key above the Enter key and below the Start key, Shift the Up Arrow key. At
the password prompt, enter 1234567890.
Press 2 to access the L parameters submenu. The password is 61265.
Parameter set 1 is for the 1108 bomb.
1. Turn calorimeter around to gain access to the back.
2. Disconnect the two temperature probes (BNC) from the controller.
3. Disconnect the two wiring harnesses (orange connectors) from the controller.
4. Remove the 6 painted Phillip screws holding the retaining plate (557DD) to the
display of the controller.
5. Parameter set 2 is for the 1107 bomb.
Parameter set 3 is for the 1104 bomb.
Parameter set 4 is unused.
6. Press the menu entry that corresponds to the bomb model number being used.
Change item 9 (Post period timeout) as required in order to eliminate post period timeout
error messages, when slow burning samples are tested. This value corresponds to the
number of ten second time intervals after ignition. The calorimeter will issue a post
period timeout error messages if the post period time exceeds this value
.
Steps to Replace a Power Supply Board in an A1135DDXX
Turn off power and remove power cord.
Remove controller from the calorimeter.
Warning: It is highly recommended that all Electro-static Discharge (ESD)
abatement procedures are used. Failure to do so can damage the circuit boards and
void your warranty.
1.. At an ESD approved workstation remove the display. Disconnect the two cables
attached to the display. Set the display to the side. Care should be taken to avoid
scratching the display.
1. Remove the screws holding the left panel to the chasis. Note: there are two screws
on the bottom of the unit. The power supply board is at the front of the side panel.
2. Remove the harness from the top of the board, the cable from the board to the fan and
the harness at the bottom of the board..
3. Remove the four screws holding the power supply board to the panel.
4. Install the replacement power supply board.
5. Reassemble unit by following these instructions in reverse.
Steps to replace a CPU Board in an A1135DDXX
Turn off power and remove power cord.
Remove controller from the calorimeter.
Warning: It is highly recommended that all Electro-static Discharge (ESD)
abatement procedures are used. Failure to do so can damage the circuit boards and
void your warranty.
1. Disconnect the two temperature probes (BNC) from the controller.
2. Disconnect the two wiring harnesses (orange connectors) from the controller.
3. At an ESD approved workstation remove the display. Disconnect the two cables