RKI Instruments GX-86A - Manual (Page 30)

Model GX-86A Instruction Manual
RKI Instruments, Inc. Page 29
Note
If the batteries are fully discharged before replacement,
allow 1/2 hour for the toxics circuits to show a normal
response.
Sensor Maintenance
Electrochemical sensors (O
2
, H
2
S, CO) gradually deteriorate,
regardless of use, and require periodic replacement. Combustibles
sensor life is generally related to usage, but other factors may affect
duration.
The GX-86A sensors are easy to replace, but only the combustibles
sensor contains user-serviceable components. If a sensor requires
replacement, call RKI or your local distributor. All sensors are
warranted usable for one year from the date of shipment. Sensors that
fail within the warranty period will be replaced at no charge.
Combustibles Sensor
Replace the combustibles sensor or filaments when:
1. The combustibles circuit cannot be calibrated correctly.
2. The HC (%LEL) display does not show 0 immediately after the
start-up sequence, and it cannot be set to zero by the Demand Zero
command.
O
2
Sensor
Replace the O
2
sensor when:
1. The O
2
circuit cannot be set to 00.0% on an oxygen-free sample.
2. The OXY (O2) display does not show 20.9% immediately after