Sentry Equipment Corp | Sample Sequencer
5
SPD 5.5.15 51
7 MAINTENANCE
7.1 Cleaning
The Sample Sequencer is constructed of rugged materials that do not require cleaning. If
cleaning the external surfaces is desired, a soft cloth and water is recommended.
7.2 Battery
The Sequencer board contains a lithium ion battery. This battery is not intended for field
replacement. Contact the factory for additional information regarding replacing this battery or
proper disposal of a CPU board containing the lithium ion battery.
The power supply uses a 4 A fast acting fuse rated for 250 V.
Replacement fuses for the power supply are available from Sentry. Refer to the Spare Parts List of
this manual for further information. Refer to the Disassembly procedure for instructions on
replacing user replaceable parts such as fuses.
7.3 Disassembly
Electrical Shock Hazard – Disconnect all power, including
voltages connected to relays, before servicing or replacing
fuses.
AVERTISSEMENT
Risque potentiel choc électrique – Enlever la source
d’alimentation incluant les sources de voltage au relais avant
tout entretien ou remplacement des fusibles.
Use the following steps to replace any user serviceable parts:
1. Open the door of the enclosure using a screwdriver to unlock the door.
2. Disconnect all terminal blocks on the circuit board. Remove the circuit board by removing
the mounting screws.
3. Disconnect the power supply cable from the power supply board.
4. Replace desired part, such as fuse, circuit board, or cable assembly.
5. Replace the circuit board. Secure the board in place using the screws removed in step 2.
Reconnect all terminal blocks.
6. Close and lock door.
7.4 Calibration
Note: The analog circuitry of the Sample Sequencer is calibrated at Sentry prior to shipment.
Re-calibration should be performed by properly trained personnel. Refer to the following
procedures to calibrate the analog circuits of the Sample Sequencer:
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