is fully charged. Only charge the battery when ambient temperature is between
16°C and30°C (61°F and 86°F) It normally takes about three hours to fully
charge the battery.The instrument can be operated while the b attery is being
charged.The charging indicator on the back panel is green when the battery is
fully chargedand amber when being charged using the AC adapter.
The battery may self-discharge overseveral months, especially if the tempera-
ture iswarm. The battery pack can be used for a minimum of 500 charge-dis-
chargecycles before needing to be replaced. Replacement battery packs are
availablefrom the manufacturer. The battery pack can be easily removed and
replaced in the fieldby following this procedure:
1. Power the 1529 off and unplug the AC adapter from the unit.
2. Turn the 1529 over to expose the battery compartment. Remove the bat-
tery cover hex screw. Place the screw in a safe place so it won’t get lost.
Flip open the battery cover to reach the battery pack.
3. Remove the battery pack. Gently disconnect the battery plug connector.
4. Attach the polarized plug of the new battery pack onto the connector.
Note: The battery plug is polarized and can only be plugged in one di-
rection. DO NOT force it. Place the battery pack in the battery
compartment.
5. Close the battery cover and replace the screw. Avoid pinching the battery
wires.
6. Plug in the AC adapter and charge for a minimum of four hours for the
initial charge. Used batteries must be disposed of properly. Check your
local regulations for additional information. You may return used batter-
ies to the manufacturer. Never dispose of batteries in fire as this may re-
sult in an explosion with the possibility of personal injury or property
damage.
When the battery charge is not at 100%, the measurement accuracyis not af-
fected. If the poweris interrupted while the instrument is logging measure-
ments (on demand or automatically),the logged data is preserved and logging
resumes when the poweris restored.
6.4 Probe Input Modules
The 1529 can be configuredin three ways:
•TwoRTD/thermistor input modules.
•Two thermocouple input modules.
•One RTD/thermistor and one thermocouple input module.
Each inputmodule supports two channels. Your 1529 thermometer readout is
configuredat the factory and is not field changeable. Input modules should
neverbe removed for any reason.
1529 Chub-E4 Thermometer Readout
User’s Guide
22